MEILING DW-HL50-HC Ultra Low Temperature Freezer Instruction Manual

Instruction Manual for MEILING models including: DW-HL398-M-SA-HC, DW-HL528-M-SA-HC, DW-HL678-M-SA-HC, DW-HL778-M-SA-HC, DW-HL858-M-SA-HC, DW-HL1008-M-SA-HC, DW-HL50-HC, DW-HL100-HC, DW-HL218-HC, DW-HL340, DW-HW50-HC, DW-HW138, DW-HW328, DW-HW668, DW-HL50-HC Ultra Low Temperature Freezer, DW-HL50-HC, Ultra Low Temperature Freezer, Low Temperature Freezer, Temperature Freezer, Freezer

148527-ult-freezer-dw-hw50hc-meling-biomedical-operation-manual

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148527-ult-freezer-dw-hw50hc-meling-biomedical-operation-manual

Ultra-Low Temperature Freezer
Operation Manual
The following product models are applicable: DW-HL398/M/SA/HC DW-HL528/M/SA/HC DW-HL678/M/SA/HC DW-HL778/M/SA/HC DW-HL858/M/SA/HC DW-HL1008/M/SA/HC DW-HL50/HC DW-HL100/HC DW-HL218/HC DW-HL340 DW-HW50/HC DW-HW138 DW-HW328 DW-HW668
Zhongke Meiling Cryogenics Company Limited

Better science, Better life!
www.melingbiomedical.com zkmeiling@zkmeiling.com

Table of Contents

1. Application Notes

2. Safety Instructions

3. Precautions in Use

4. Product Installation

4.1 Installation Environment

4.2 Installation Site

4.3 Preparation before Use

4.4 First Power-on

4.5 Operation after Power Failure

5. Component Composition

6. Operating Instructions (Version 1)

6. Operating Instructions (Version 2)

6.1 Introduction to Homepage

6.2 Alarm Management

6.3 Access Management

6.4 Data View

6.5 Data Curve

6.6 Settings

6.7 Message Board

6.8 Login

7. Optional Accessories

7.1 Bluetooth printer

7.2 Printer

7.3 Chart Recorder

7.4 Remote Alarm Terminal and RS485 Interface

7.5 CO2 Backup System

7.6 Freezer Rack and Freezer Box

8.Defrost, Discontinuation and Maintenance

8.1 Equipment Maintenance

8.2 Equipment Discontinuation

8.3 Maintenance, Replacement and Recovery of Rechargeable Batteries

9. Troubleshooting and Maintenance Services

10. Specifications

11. Accessories

1. Application Notes
Thank you for choosing MELING BIOMEDICAL products! For your safe and convenient use and reasonable maintenance of the equipment, please read the Operation Manual carefully before use and keep it properly for reference. The equipment operator can copy some chapters of this operation manual, but only for internal use, for example, to instruct the user how to deal with emergencies. These chapters are clearly marked in the catalog of the manual. MELING BIOMEDICAL has no obligation and responsibility for any instrument damage caused by the user's failure to use the equipment according to the instructions or the method specified by the manufacturer. Due to the rapid improvement of MELING BIOMEDICAL products, the functions described in the instructions may be inconsistent with those of the products you purchased. Please refer to the physical functions.
Ø Please read carefully the Attention and Safety Precautions in 2. Safety Instructions.
Ø During transportation or use, no violent vibration or collision is allowed and the freezer shall be kept away from rain. Store in a clean room with humidity no more than 80%, no corrosive gas and good ventilation.
Ø The ultra low-temperature freezer (hereinafter referred to as equipment) can only be operated by trained and authorized personnel.
Ø Maintenance of the equipment can only be completed by MELING BIOMEDICAL or an agent authorized by MELING BIOMEDICAL.
Ø If the operator encounters any situation not mentioned in this manual, please contact MELING BIOMEDICAL or the agent authorized by MELING BIOMEDICAL for the correct handling method.
Ø If the equipment is not used according to the method specified in the specification, it may be damaged.
Ø Try to use the accessories provided by MELING BIOMEDICAL. If users would like to use other accessories, MELING BIOMEDICAL will not be responsible for the adverse consequences caused therefrom.
Ø Equipment must be inspected and maintained regularly to ensure good operation of the equipment.
Ø The Ultra-Low Temperature Freezer is intended for cryopreservation of plasma, cells, tissues, etc; is applicable to blood stations, hospitals, epidemic prevention stations, research institutes etc.
Ø Do not use mechanical devices or other means to accelerate the defrosting process, other than those recommended by the manufacturer.

Protective gloves must be worn
Tips

Warning:
After each access, be sure to dry the water stains around the sealing strip to prevent freezing. Wear protective gloves when storing items in the equipment, and beware of frostbite!

® Always use protective equipment correctly (including clothes, gloves, goggles, etc.) ® Always keep good hygiene habits ® Each personnel is obliged to be responsible for his or her own safety
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2. Safety Instructions
When using this product for the first time, please pay attention to the meaning of the following warning signs and carefully read the safety precautions, so that you can use this equipment safely and correctly.
Warning: crushing of hands.
Beware of low temperature.
Do not use the power supply that is not specified in the equipment design, so as to avoid overheating, short circuit and other faults. For example, connecting 110V rated voltage products to 220V power supply may cause faults such as overheating and equipment burning. For detailed input voltage AC please refer to Specification (Rated voltage ±10%).If the operating voltage is too low or too high, a suitable automatic voltage stabilizer must be installed for cooperative use.
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3. Precautions in Use
® When the equipment is running, the contact part between the front part of the equipment and the outer door may generate heat. This is not a fault: in order to prevent condensation around the casing, a heating anti-condensation pipe is installed in the equipment.
® Before putting the items into the equipment, please confirm that the temperature in the freezer has reached the set value first, and then put the articles in batches. Every time you put in items, they shall not exceed 1/3 of the inner volume of the freezer so as to prevent excessive temperature rise.
® The freezer body is provided with a access port so as to lead out the test line from the cabinet during the test. After the test line is led out, it is necessary to plug the access port with thermal insulation material again, otherwise the temperature inside the freezer may not reach the set value, and condensation will appear around the outside of the through hole.
® The equipment temperature display value is the temperature at the temperature sensor in the freezer. There is a certain gap between the displayed temperature and the actual temperature at the center of the equipment when the equipment just starts running, but as the equipment enters a stable state, the displayed temperature will gradually approach the actual temperature.
® Please use a diluted neutral cleaner to clean the equipment, and do not use brushes, acid, gasoline, soap powder, polishing agent or hot water to clean the equipment, otherwise the painted surface and plastic rubber parts may be damaged. Be careful not to wipe plastic rubber parts with volatile solvents such as gasoline.
® After a period of operation, a layer of frost will form on the inner wall and inner door of the freezer body. If the frost layer is too thick, it will affect the heat preservation effect of the equipment and increase the power consumption. Therefore, once in a while, when the frost layer reaches about 5mm, the attached defrosting shovel shall be used for defrosting.
® Before defrosting, please take out the frozen items in the freezer and put them in an environment suitable for their storage, so as to prevent the item damage due to the temperature rise in the freezer during defrosting.
® Since there are many cooling coils behind and on the side of the inner wall, do not use sharp objects such as knives, ice chisels or screwdrivers to remove frost from the inner wall. Be careful not to scratch the inner wall when defrosting, otherwise it may lead to the failure.
® When the equipment is not used for a long time, the power supply shall be cut off.
4. Product Installation
4.1 Installation Environment
ò Ambient temperature: 16°C ~ 32°C, the most ideal temperature is 18°C ~ 25°C, and the air conditioning system shall be used when necessary.
ò Relative humidity: 80%RH. ò There is no strong vibration and corrosive gas around. ò Avoid the existence of a large amount of dust. ò Avoid rocking or shaking the equipment. ò Elevation of the working position of the equipment: less than 2000m. ò Indoor use, pollution degree 2, and overvoltage category II. ò For detailed input voltage AC please refer to Specification(Rated voltage ±10%). ò There is no direct sunlight, other cold and heat sources and strong electromagnetic interference, which will affect
the normal operation of the control system and directly damage the system in severe cases.
Attention: Since the ambient temperature has great influence on the equipment, if the above environmental requirements cannot be met, the equipment may not run normally. Please improve the environment before using the equipment; The equipment is operated intermittently.
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4.2 Installation Site
In order to operate the equipment normally and obtain the best performance level, the installation site of the equipment shall meet the following requirements: ò It cannot be installed in a narrow and closed space, and the door of the room shall not be smaller or lower than this
equipment, which shall at least ensure the normal access of the equipment, so as to avoid the maintenance difficulties in case of equipment failure, which may result in damage to stored items due to the failure to repair the equipment in time; ò The installation floor must be solid, flat, non-combustible and able to bear the weight of the equipment during operation; ò It shall be with good ventilation, and direct sunlight shall be avoided. ò Each equipment needs to use a power outlet independently. Please ensure that the plug and outlet are firmly connected; ò Check the working voltage before use. In areas with unstable voltage, consider using a voltage stabilizer suitable for the equipment load to ensure that the input voltage requirements in the installation environment are met. ò Equipment shall be reliably grounded. If the power cord outlet is equipped with grounding wire, check whether the grounding is good before use. If the outlet is not equipped with grounding wire, it must be installed by professional engineers and technicians.
4.3 Preparation before use:
1.Remove the outer packaging of all products (including the protective foam in the packaging box)
Warning: Don't put the plastic bags within the reach of children, so as to prevent suffocation accidents. 2. Inventory of accessories: Please check the accessories and materials according to the packing list. 3. Cleaning: Clean the product once before use. 4. Adjust anti-skid leveling feet: Please use a wrench to rotate the fixing foot clockwise so that the fixing foot
extends outward and is supported on the ground. Ensure that the equipment will not move when in use.
4.4 First Power-on
When using the equipment for the first time, please follow these steps: 1. After the equipment is placed, leveled and cleaned, it shall stand for more than 24 hours, and then power it on to
ensure the normal operation of the equipment. 2. Under no-load condition, connect the power cord to a special outlet with appropriate specifications. 3. After switching on, turn on the power switch of the equipment (if the auxiliary cooling system is installed, turn off the
switch first). 4. Set the required temperature in the freezer (in order to give full play to the best performance of the freezer, if the user
needs to use the freezer at a storage temperature below -80°C, please set the temperature at -80°C when using it for the first time. After the system runs stably at -80°C for 3~4 hours, the temperature can be further lowered to below 80°C! ). 5. In case of an alarm after power-on for the first time, click the mute button to eliminate the alarm sound. 6. Check whether the operating temperature of the equipment reaches the required value, observe the normal start and stop of the equipment for more than 24 hours, and put a small amount of items in the freezer after confirming the normal performance. 7. Please store items in batches, with the items not exceeding 1/3 of the freezer volume each time. Ensure that the equipment is running properly after shutdown for more than 12 hours before putting in the next batch of items). 8. Try not to open the door during cooling, otherwise the temperature will rise. 9. Turn on the auxiliary cooling system if it is installed.
4.5 Operation after Power Failure
1. The equipment has a memory function for the set value. When the power is restored after power failure, the equipment will continue to operate before power failure.
2. Once the equipment is powered off, it requires 5 minutes before it can be switched on again, so as to avoid damaging the compressor.
3. We guarantee the normal operation of this equipment under certain conditions, but we are not responsible for any loss or damage of stored items after power failure.
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Notes:
® The transportation and movement of equipment is realized by casters. ® A special person should be responsible for checking and recording the running status of the equipment every day (record
and check once every 2-4 hours). In case of failure or shutdown, the temperature in the freezer will rise. If it cannot be repaired in a short time, please take out the stored items and transfer them to a place that meets the temperature requirements for storage to avoid damage to the items. ® Before putting items into the equipment, it shall be confirmed in advance whether the temperature range of the equipment meets the temperature requirement of the items, so as to avoid damage to stored items due to the difference between the settable temperature of the equipment and the required temperature of the items. Please pay attention not to block the air outlet and air inlet when putting items into the equipment. ® Due to the refrigeration inertia, there is a certain difference between the actual display temperature and the set temperature of the equipment, which is a normal phenomenon. ® The equipment is an item storage equipment, which cannot be used for routine production operations. It is strictly forbidden to put too many items which are relatively hot into the equipment at one time, otherwise the compressor will run for a long time, and be burned due to high temperature. Items must be put in batches, so as to ensure that the freezer is cooled step by step until the temperature required for storing items is reached. ® Electrical appliances without production license shall not be used inside the equipment. ® During use, when the power supply voltage fluctuates or an short-time alarm is triggered, if the voltage error within ±10%,it will not affect the normal use of the freezer. ® Do not change the set temperature frequently in a short time, otherwise the expected setting effect may not be achieved due to the large temperature inertia; Ensure that there is a certain air circulation space around the cabinet when putting in items, especially do not block the temperature sensor in the cabinet (for collecting the temperature of the cabinet), otherwise it will affect the stability and accurate control of the temperature in the freezer body! ® When putting in items, if the moisture content of the items is too much or too little, it will affect the humidity change in the cabinet, so it is best to keep the items sealed; The humidity of the working environment will affect the change of humidity in the cabinet, especially if the door is opened too frequently and the door is not closed properly.
Warning: Children are not allowed to play with this equipment as a game prop, otherwise the injury or loss
caused therefrom will be at their own risk.
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5. Component Composition
Outer Door

Movable caster

DW-HW328/DW-HW668

Outer Door Controller board

display panel

Condenser filter
DW-HL340/HL218/HC 7

Door lock

Movable caster

DW-HW138

Door handle (with lock)

DW-HL50/HC DW-HL100/HC

Movable caster
Power switch
DW-HW50/HC

Display panel

Outer door

Movable caster

Air inlet and condenser filter screen
Adjustable anti-skid leveling feet

DW-HL398M ~ 1008M series (schematic diagram)

Method for door opening:

When storing valuables, if necessary, please add padlock after the door is closed!

Note: For products equipped with the safety function of the electric control lock, please log in and
release the electric control lock before opening the door.
Open the filter screen from here

The schematic diagram is only used to illustrate the opening position of the filter screen and the position of the bottom support foot,and the rest varies depending on the model.

There are adjustable anti-skid leveling feet in front of the two front casters at the bottom of

the equipment. Please use accompanying tools

to turn the leveling feet downwards

after the equipment is placed securely, so as to stabilize the machine.

When you need to move the equipment, please turn the leveling feet upwards. Do not move it forcibly so as to avoid damage! Adjustable anti-skid leveling feet

Electric control door lock module (optional)
Display panel
Card swiping module (optional) Fingerprint recognition module (optional)

Outer door
USB flash drive interface

Power switch

Movable caster

Air inlet and condenser filter screen
Adjustable anti-skid leveling feet

DW-HL398/SA/HC ~ 1008/SA/HC series (schematic diagram)
* Due to the improvement of products and model differences, the actual products may be different from the diagram. Please refer to the actual products! The diagram is only used for functional parts description. * Structure and composition: The product consists of freezer body, door (glass door structure or foam door structure), refrigeration system and control system.

.6 Operating Instructions (Version 1)

6.1 Function Introduction

1.Function description of indicators (see the table on the right)

Remote port
Battery level

Key lock
Power failure

Refrigerati Power

supply

Mute

Door switch

a. Remote port indicator optional When the reserved RS-485 remote port is not connected to the freezer, the remote port indicator will be off; when the freezer is successfully connected to the reserved RS-485 serial port, the remote port indicator will be on. b. Key lock indicator When the keys are in a locked state, none of the keys will respond and the key lock lights up. In this case, after pressing the up key + down key for 3s, you will be prompted to enter the password, which is defaulted as "0005." After entering it correctly, press the Set/Mute Multiplex key and the key lock will be released. At this time, the key lock indicator will be off. In the unlocked state, if no key is pressed in 60s, the key lock is activated, and the key lock indicator is on. Long press the up key + down key for 3s, and the keys are locked. c. Refrigeration indicator If the compressor is in working condition, the refrigeration indicator is normally on; If the compressor is in a shutdown state, the refrigeration indicator is off. d. Power indicator When the indicator is on, it means that the power switch of the product has been turned on. e. Low battery level indicator When the battery voltage is less than 10.8V, the buzzer will be triggered, the low battery indicator will be on and the digital tube will flash the low battery code "BL" alternately at intervals of 3s; when the battery voltage is greater than 12V, the buzzer will be turned off, the low battery indicator will be off and the digital tube will resume normal display. f. Power failure The freezer is normally powered by 220V. When there is blackout, the buzzer will be triggered, the digital tube flashes the power failure code "PF" alternately at 3s intervals and the power-off indicator is on. When the input power is turned on, it will return to normal and the power-off indicator is off. g. Mute indicator When the mute key is activated, the indicator is on; When the alarm mute function is canceled, the indicator is off. h. Door switch indicator When the door is opened, the door switch indicator is on; When the door is closed, the door switch indicator is off.

temperature display window, which displays the average temperature inside the freezer body in °C

under normal operations;

View ambient temperature:

In the key locked state, press key and the digital tube will display the ambient temperature and return to

normal display after 5 s without key operations or pressing and .In the key unlock state, press key,

and digital tube displays ambient temperature, and returns to normal display after 5s without key operation.

A.T. check: in the key locked state, press and key and the digital tube will display the ambient

temperature and return to normal display after 5 s without key operations or pressing and .

3. is an up key; in parameter setting mode, move to the next parameter or increase the parameter value.

For example, when adjust the set temperature, press this key to increase the set temperature value. When

adjust the parameter value, long press the up button, and the parameter will increase rapidly. Under normal

conditions, long press the up key for 3 seconds to import the data of the USB flash drive in 12 months.

4. is a down key;

In parameter setting mode, move to the previous parameter or decrease the parameter value. For example,

when adjust the set temperature, press this key reduce the set temperature.

When setting the parameter value, long press the down button, and the parameter will decrease rapidly.

5. is the set/mute key; in case of no alarm state and key unlocked state, press and display the ambient

temperature for 5s and then return to normal display; in the unlocked state, press for more than 3s and

enter the user menu.

When the buzzer is triggered (including cabinet high-temperature alarm, door opening alarm, sensor failure

alarm, etc.) and in the button unlocked state, press for the first time and the buzzer will stop ringing and

the ambient temperature is displayed for 5s, after that, normal display will be resumed (pressing the mute

button is only to turn off the buzzer for alarming this abnormal state, for example troubleshooting but the

buzzer will be triggered next time for any abnormality). Then press again, trigger the buzzer, display the

ambient temperature for 5s and resume the display of chamber temperature and alarm state. In the key

unlock state, can be used as a setting key.

In unlock state and parameter setting mode, press this key to display parameter values and parameter

names. If the pressing time is longer than 3 seconds, save the settings and return to the normal interface.

6. USB data export;

Automatic export: when the U disk is connected to the USB interface, the recorder buzzer will chirp once and

display "on". PDF files of data that not currently exported will be generated in the U disk. After data

transmission, the buzzer will chirp once again and display "End".After 6s, it will return to normal display.

Note: When there is less data, the digital tube will not display "on" and "End."

Manual export: in the key unlocked state and when the USB flash drive is connected and the file is not being

generated, press the key up for 3 seconds and the digital tube will display "d01." Press the up key or down

key to adjust "d00~d12" and press key to obtain the file generation (d00) or generate the PDF file of the

record data of the previous months (1-12).

Note: when the alarm of the digital tube flashes and displays "LoF," the recorder is not started; Meanwhile

press and key for 3s, and "LoF" disappears, the buzzer beeps once and the recorder is started.

6.2 Function Settings
1. Power on and turn on the power switch on of the freezer body and the equipment will enter the working
state;

Unlock:under normal operating state,simultaneously press and keys for 3s and the digital tube will
display the parameter code"0000";By pressing to enter the password"0005"and holding to unlock.
Then press key for 3s,the digital tube will display the parameter code"PS1"and enter the setting and
adjustment parameters.Use or key to scroll the parameters; Use or key to scroll the parameters ; Press to confirm the parameter type, and the first parameter name of this type of parameter will be displayed; Use or key to scroll the parameters; Press key to display the corresponding parameter value; Use or to increase or decrease the value; Use temporarily store the modified values and return to the display parameters;

If other parameters are modified, repeat steps Press for more than 3s, save the modified parameters and return to the display parameter category. Press for more than 3s, or press no key in 60s to exit the parameter setting program.
6.3 Parameter Display
The following table is a comparison table for parameter display.

No. Menuitem

Parameter Range

Suggested settings

Remarks

MAX

MIN

CLR

Set

_ _ _ -86.0~-40.0
0.0~10.0

0.0~10.0

Set logger module time - year

Set logger module time - month

Set logger module time - day

Set logger module time - hour

Set logger module time - minute

tH1

0~240min 20.0~50.0

Ps1

0~9999

_ _ _ -80.0
10.0
10.0 _ _ _ _ _ 20
40.0 5 _

The highest temperature since last clerance
The lowest temperature since last clerance
Clearance of the Max and Min temperature records
Temperature setting
Set value of high temperature alarm set+H; When H =0, High temp alarm is disabled; When the alarm is over high temp alarm set, H1 will be displayed on the controller
Set value of low temperature alarm set-L; When L =0, Low temp alarm is disabled; When the alarm is below low temp alarm set, L1 will be displayed on the controller
_ _ _ _ _
Print interval
Upper limit of ambient temperature alarm
User menu password settings
Repair Information 1

Repair Information 2

Quick setting of time after power on After the power-on self-test on the display board is completed, the quick setting menu is displayed.

Menu item Menu

Menu description

Set range

Default

Unit

n Set logger module time - year

10~50

y Set logger module time - month

1~12

r Set logger module time - day

01~31

Quick

S Set logger module time - hour

00~23

Settings

F Set logger module time - minute

00~59

Pt Print interval

0~240

min

0~240

SCY Temperature data recording period 0: shielded

min

recorder

If there is no operation for 60 seconds under the quick setting menu, it will automatically exit the quick setting menu and return to normal display.

6.4 Alarm Display

The following table is a comparison table of alarm codes and fault descriptions.

Alarm Code

Default Description

High temperature alarm

Low temperature alarm

High ambient temperature alarm

High condenser temperature alarm

Door opening alarm

Power failure alarm

Low battery alarm

The recorder is not connected

LoF

The recorder is not started

Communication failure

Notes:
® It is normal that a "High temperature alarm" is given when the machine is turned on for the first time. Put items into the freezer only after the temperature in the freezer stabilizes and the "high temperature alarm" is automatically released.
® The items stored each time cannot exceed 1/3 of the freezer capacity. After the freezer reaches the set temperature and operates normally for 24 hours, put another 1/3 of the freezer capacity of items for storage.
® Try not to open the door during cooling, otherwise the temperature will rise. ® Do not change the set temperature frequently within a short time, otherwise your expected setting effect
may not be achieved due to the large temperature inertia; Ensure that there is a certain air circulation space around the cabinet when putting in items, especially do not block the temperature sensor hole in the cabinet (for collecting the temperature in the cabinet), otherwise it will affect the stability and accurate display control of the temperature in the freezer body! ® Items stored should not block the temperature sensor hole in the cabinet (for collecting the temperature in the cabinet), otherwise it will affect the stability and accurate display control of the temperature in the freezer body!

.6 Operating Instructions (Version 2)
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The main interface display may vary slightly depending on the product model. 6.1 Introduction to Homepage 6.1.1 Status bar

The upper part shows the current time of the system, and the lower part shows the

status of Wi-Fi and Bluetooth;

b. Electric control lock icon. Click the icon to open the electric control lock. Before opening the Freezer door, you need to open the electric control lock (note: please log in before unlocking, users who do not log in do not have the authority to open the electromagnetic lock; the electromagnetic lock will automatically close a certain period after opening, without manual locking; if the door remains open for a long time after it is opened and the handle is locked so that the door cannot be closed due to the locked handled, please click the electromagnetic lock icon to unlock it and then close the door);

Alarm status icon. If there is any alarm information, an alarm sound will be sent out and the red

status indicator will flash (the alarm flashing cannot be canceled until the fault is eliminated). Click the icon to

turn on/off the alarm sound, and long-press the icon to enter the alarm management interface (you do not

need to log in before entering the alarm management interface). If there are unread alarm messages, the

number of unread messages will be displayed in the upper-right corner of the icon;

User status icon. After the user logs in, the last word of the user name will be displayed. Click the

icon when you do not log in, it will jump to the login page. Click the icon after you log in, a shortcut menu will

pop up where you can view the user information, modify the password, log out, set the fingerprint (optional),

set the card wiping (optional), set the face login (optional), etc. The initial user name is user001 and the initial

password is 123456. You need to change the password when logging in for the first time.

6.1.2 Information display area

Display the real-time temperature inside the ultra low-temperature freezer and the

temperature unit. When the temperature in the freezer is between the high-temperature alarm value

and the low-temperature alarm value, the outer ring is a blue-green gradient, otherwise, the outer

ring is a red-orange gradient. Click the temperature value to enter the running status interface (you

do not need to log in before entering the running status interface);

Display the ambient temperature;

Display the setting temperature;

Compressor state indicators,the blue one means the compressor operate in normal,while

yellow one means the compressor has been forbidden,the red one means the compressor(s) has(have) a

certain issue(This icon shows the compressor fault alarm function on some models and only for

reference. Please refer to the actual machine interface )

6.1.3 Function entry area

Access management entry. Click to enter the access management interface where you can

conduct access management for the items in the ultra low-temperature freezer. You need to log in before

entering this function interface;

Data view entry. Click to enter the data view page where you can view historical equipment

running data and operation data. You do not need to log in before entering this function interface;

Data curve entry. Click to enter the data curve viewing interface where you can view the historical

temperature curves in the freezer. You do not need to log in before entering this function interface;

Setting management entry. Click to enter the setting management interface where you can set

various parameters or functions of the equipment. You need to log in before entering this function interface;

Message board entry. Click to enter the message board interface where you can post messages

and view messages. If there are unread messages, the corner mark in the upper-right corner will show the

number. You need to log in before entering this function interface.

6.2 Alarm Management

a. Alarm management. You can view the alarm contents, the alarm occurrence time, the release time, and the alarm time. Click the screen button in the upper-left corner to filter the alarm time by date;

b. Click the button to identify that the alarm entry has been viewed;

c. Click the

button to return to the previous interface, click the

main interface, and click the

button to pop up the help information;

button to return to the

d. The alarm functions of this equipment are as follows:

Alarm items

Alarm description

Communication failure with the mainboard

When the transmission signal between the display screen and the main control board is interrupted, a communication failure alarm will be triggered.

Alarm for the door being open for a long time Ambient temperature sensor failure

When the door has been open for more than 1 minute When the ambient temperature sensor fails

Condenser sensor failure

When the condenser sensor fails

Temperature sensor failure Pt1000 high-temperature alarm Pt1000 low temperature alarm Alarm for high condenser temperature Alarm for high ambient temperature Low battery Battery power detection failure

When the temperature sensor fails
When the temperature in the cabinet is higher than the set temperature of high temperature alarm When the temperature in the cabinet is lower than the set temperature of low temperature alarm When the condenser temperature is too high due to the condenser filter screen blockage or high ambient temperature
When the ambient temperature is too high
When the battery is too low
Battery power detection failure

Power failure

When the main power supply fails

6.3 Access Management
a.Takeout management page. Click the add/remove button on the right side of the sample to set the
quantity, and then click the takeout button in the upper-left corner;
b.Storage management page. First, select the type, then set the storage quantity, and then click the OK button;
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c.Type setting page. Click the add button in the upper-left corner to add a new type, and click the operation button to the right of the type entry to edit the type;

d.History page, for viewing historical access records. Click the corner to filter records by date.

filter button in the upper-left

6.4 Data View

a.Data records page, for viewing historical running data. Click the filter button in the upper-left corner to filter
records by date;

b. Operation records interface. You can view historical operation records, and click the

filter button to

filter records by date. The types of operation records are: login, logout, the addition of users, modification of

users, export, temperature setting, alarm setting, unlock, printing, opening the door, closing the door;

c. Alarm records interface, for viewing historical alarm records;

d.Click the

export button to pop up the export range selection dialog box. Select the export start

date and the export end date by date, and click the OK button to export a data file in Excel format (*.xls) to

the USB flash drive;

e. Click the

print button to pop up the print setting dialog box where you can choose to Print by time

or Print by day. You need to set the start and end time and the printing interval for Print by time, and set the

start and end time and the printing time point for Print by day. (A printer needs to be connected for use of the

function. The equipment can be connected to a Bluetooth printer via Bluetooth)

6.5 Data Curve

a. Click on the day/week/month tab to view the curve graph of the corresponding tab; b. Click the previous day/next day tab to switch to the curve graph corresponding to the date; c. Click the filter button in the upper-left corner to jump to the curve graph of the corresponding date; d. Click the export button in the upper-left corner to export the curve figure to the USB flash drive; e. Pinch-to-zoom to zoom in/out the curve graph, and slide with a single finger to view detailed temperature value.
22

6.6 Settings
a. Temperature setting. You can slide on the slider or click the temperature value to modify the set temperature, and click the °C (Celsius temperature scale) or °F (Fahrenheit temperature scale) to switch the temperature scale;
b. Alarm setting. You can slide on the slider or click the value to set the high-temperature alarm value, the low-temperature alarm value, the high ambient temperature alarm value;
23

c. User management. The administrator can add or modify users. The user created by the administrator is an ordinary user (ordinary users do not have the authority to add/modify contents). Click Reset password to reset the user's login password. The initial password is 123456.
d. System settings. You can adjust the equipment brightness, the time for the display screen to automatically go off when there is no operation, the time for the display screen to automatically return to the main interface when there is no operation, the volume, the alarm sound (the changed alarm sound will take effect after the display screen returns to the main interface), the date and time, the automatic user logout time, and the language;
24

e. Machine information. This page displays the current machine model, the software version, and the hardware version. If the machine has been connected to the Internet, you can click the Check update button on this page to check the software update. If a newer version exists, you can choose to download and install the newer version;
f. Other settings. Only the administrator has the authority to view the page. In this page, the administrator can set to hide/show virtual buttons, and set the initial password for new user login, whether the exported Excel file is encrypted, the encryption password, the settable temperature interval, the printer selection, and the equipment name setting.
25

6.7 Message Board

a. Click the add button in the lower-right corner to pop up a message posting dialog box. You can choose to be open to all or specified users. Open to all means that all users can view the message, and Open to specific users means that the message can only be viewed by the specified users;

b. Click the

button to identify that the message entry has been viewed;

c. Click Mine/All in the upper-left corner to switch between my and all messages;

d. Press and hold the message entry and slide to the left. The delete button will appear on the right side of the message. You can choose to delete the message.

6.8 Login
a. Login with account number and password

Enter the correct account number and password to log in. The default password for new users is 123456. You will be asked to change the password when logging in for the first time. The administrator can change the default password for new users in Settings -> Other settings -> Set the initial password. b.Login with fingerprint (optional)
After the user logs in, enter the fingerprint registration interface from the menu on the right side of the homepage. Once a fingerprint is successfully registered, you can log in with the fingerprint (To log in with the fingerprint, you need to jump to the login page);
27

c. Login with card (optional)
After the user logs in, enter the card registration interface from the menu on the right side of the homepage. Once a IC or ID card is successfully registered, you can log in with the IC or ID card (To log in with the card, you need to jump to the login page); d.Login with face (optional)
After the user logs in, enter the face registration interface from the menu on the right side of the homepage. After a face is recognized, click the icon on the interface to register the face. After successful registration, click the icon on the login page to enter the face recognition interface for face login. (Note: When a face is registered for the first time, it needs to be activated online, and then it can be used offline. If the face cannot be registered after the machine is powered off, it can be activated again online).
28

7 Optional Accessories

1. Printer

The printer has been installed with a paper roll at the factory. If the paper roll is used up after a long period of

use, you can buy the same paper roll (size: thermal paper, paper width: 57.5±0.5mm, the outer diameter of

the reel: not greater than 40mm, i.e. RM57*40 back-roll paper)

Description of printer panel:

Open button. Press to open the cover; SEL button, indicator light, for factory setting. Do not press it;

Lf button. The green indicator is the power indicator and it is

normally on when the power is turned on; Paper roll.

Install the paper roll:

Press the open button 1, open the cover, install the paper roll, close

the cover plate and allow the head of the roll paper to slightly extend

out of the cover plate.

Note: If a Bluetooth printer is selected, please refer to the "Operating

Instructions for Bluetooth Printer" in the accessory bag.

2. Bluetooth printer(Only applicable to touch screens)
Note: For the use of Bluetooth printer, please refer to the Bluetooth Printer Manual in the accessory pouch

7.2 Chart Recorder
It is an optional function. If the function is selected, please refer to the "Operation Instructions for Graph Recorder" in the accessory bag.

7.3 Remote Alarm Terminal and RS485 Interface
The remote alarm terminal is installed on the back or the lower part of the right side of the freezer body, and the alarm signal is output by the terminal. The load-bearing capacity of the terminal is 30V, 2A DC. Users can choose normally open (N.O.), normally closed (N.C.) and common terminals (COM) according to their own needs.

7.4 CO2 Backup System(DW-HL50&100&HW50(110 60))
The CO2 backup system is an auxiliary refrigeration system that uses liquid CO2 for refrigeration. It provides refrigeration assistance for the equipment in case of power failure or

N.O. COM. N.C.

refrigeration failure, to ensure that the temperature in the

Normally Common Normally

RS-485

equipment is maintained within the required temperature

open terminal closed

range for a certain period of time.

Remote alarm terminal

When the equipment works normally, the CO2 backup system is in standby state; When the equipment is powered off, the system uses its own rechargeable battery to work and spray liquid CO2 into the refrigeration equipment at intervals to achieve the refrigeration effect; In case of refrigeration failure of the equipment, the

forced operation switch can control the backup system to work forcibly to provide refrigeration.

For installation and use, please refer to the operation steps in the Operation Instructions attached to the

device.

7.6 Freezer Rack and Freezer Box

Model

Internal dimensions of the freezer body
(mm) W x D x H

Shelf/inner door

Number of freeze racks

DW-HL398/M/SA/HC 440X696X1266

3/2

12 pcs

Dimensions of the freeze rack (mm)
W x D x H

Number of freeze boxes that can be placed (2 in.)

140X685X293

300 pcs

DW-HL528/M/SA/HC 585X696X1266

3/2

16pcs

140X685X293

400 pcs

DW-HL678/M/SA/HC 750X696X1286

3/4

20 pcs

140X685X293

500 pcs

DW-HL778/M/SA/HC 865X696X1286

3/4

24pcs

DW-HL858/M/SA/HC 877X696X1378 3/2 or 3/4 24 pcs

DW-HL1008/M/SA/HC 1022X696X1378 3/2

28 pcs

DW-HL50

305X425X430

1/1

2 pcs

140X685X293
140X685X293 140X685X351 140X685X293 140X685X351
140X413X351

600 pcs 660 pcs
770 pcs 36 pcs

DW-HL50HC

305X425X430

1/1

DW-HL100/HC

450X450X500

1/2

DW-HL218/HC

470X582X768

1/2

DW-HL340

470X578X1275

3/4

DW-HW50/HC

430X305X425

2 pcs 6pcs 6 pcs 12 pcs 6 pcs

140X413X351
140X413X235 140X413X180 140X549X293 140X549X351 40X549X293 140X549X235
140X143X404

36 pcs 63pcs 132 pcs 216 pcs 42 pcs

DW-HW138

490X470X582

9 pcs

140X143X575

90 pcs

DW-HW328

1200X470X582

24 pcs

140X143X575

240 pcs

DW-HW668

1200X815X666

40 pcs

140X143X575

400 pcs

Notes:
® Make sure that the cylinder is filled with liquid carbon dioxide. ® Since the temperature of liquid carbon dioxide is relatively low, pay attention to safety during installation and
use to prevent frostbite. ® The CO2 backup system is a backup system, which should be tested once a month to prevent system failure
from affecting its use. ® The use environment requires good ventilation to avoid physical discomfort caused by excessive carbon
dioxide and insufficient oxygen.

8. Defrost, Discontinuation and Maintenance 8
Cleaning and maintenance: 1.The equipment should be cleaned and maintained regularly (for safety, please unplug the power plug) and the inner and outer surfaces of the freezer should be wiped with a warm, damp soft cloth. Cleaning the filter screen: regularly remove the dust on the filter screen, to ensure the heat dissipation effect. For the filter screen of DW-HL100, DW-HL218 and DW-HL340, the cleaning method: 1. Move the upper-right corner of the front ventilation plate outward and open the ventilation plate; 2. Lift the filter screen to remove it (see the figure below. There are two states: left and right, which is subject to the actual product); 3. Gently remove the surface dust with a brush or rinse with tap water, dry, and reinstall it).
Warning:
Notes:
® Do not sprinkle water directly on the cabinet, lest the insulation performance of electrical components decrease and metal parts rust.
® Do not use hot water, corrosive detergent or organic solvent to clean the freezer body. ® Do not place heavy objects on top of the equipment, as the equipment may deform under pressure. ® The air switch equipped with our products provides both manual operation and automatic
management options for the users. In the event of electric short circuit or overload, the air switching device can cut off the electric supplies automactically for the safty and protection of the entire system and machine in the same time.
31

8
8.3 Maintenance, Replacement and Recovery of Rechargeable Batteries 8.3.1 Battery maintenance:
In order to prolong the service life of the battery and avoid the product being left unused for a long time, the product must be operated for more than 24 hours every month to facilitate charging. When the equipment is not used for a long time, it should be connected to the working power regularly (generally once a month), and the power lock switch should be turned on so that the equipment can run for a period to complete charging, and each charging time should be no less than 24 hours. When the working power supply is interrupted, the power lock switch of the equipment shall be turned off in time, otherwise it will cause power loss in battery and even permanent damage to the battery in severe cases. The main power switch must be turned off during a long-term power outage or during transportation, otherwise long-term discharge causes power loss in the battery and even permanent damage to the battery and the display is abnormal after re-energizing. The battery is a consumable, with a service life of about 2-3 years. If the battery is used improperly, such as power loss or reaching the end of battery life, it will cause a low battery alarm (refrigeration is not affected, but there is an alarm failure and the power failure alarm function does not work, please contact our aftersales staff for replacement).
Here is the 12V 4Ah battery

After removing the screws on the right side plate of the frame, remove the right side plate of the frame .

After removing the screws on the left side plate of the frame, remove the left side plate.

Location 12V 4Ah battery

The right side frame can be removed after taking out all the screws

8.3.2 Replacement and recovery of batteries
Turn off the power switch and pull out the power plug from the outlet. Remove the screws on the right side plate of the freezer body frame with a screwdriver. (Note: The battery can
be replaced without opening the electrical box. There are high-voltage electrical components in the electrical box, therefore before opening, turn off the power supply, unplug the power plug and turn off the power switch of the freezer, and the electrical box can only be opened by qualified engineers or maintenance personnel). Pull out the battery connecting cable. The battery is located on the left side outside the electrical box. (Before unplugging the battery fixing cable, pay attention to the cathode/anode of the battery and the sequence of the connecting cables, to prevent burning down the control system due to installation of the new battery with cathode/anode reversed. Generally, the red wire is connected to the cathode, and the black wire is connected to the anode. Use a screwdriver to remove the fastening screws on the battery fixing plate and take out the battery. The newly replaced batteries should be BT-12M4.0AC (12V4.0Ah). For a replaced battery that can be recycled, please contact the local battery recycling agency. In order to effectively ensure that the battery replacement meets the requirements of the control system and avoid the influence of improper operation on the system, please contact our after-sales personnel for replacement or guidance.

9. Troubleshooting and Maintenance Services
Any product may fail. Please observe the operation of equipment in time during use. If there is any abnormality, please check and handle it according to the following table first. If the abnormality can't be changed, please inform our service center in time, and we will serve you wholeheartedly to avoid losses.

Problems

Causes and solutions

Ultra low temperature freezer fails to work

Please make sure that the outlet is energized. Please make sure power plug is plugged in,not loose. Please make sure the power fuse is not disconnected. Please make sure the supply voltage is appropriate,not too low or too high.

Compressor is not running

Please make sure the switch on the right side bottom of the freezer is turned on. Please make sure that the temperature is set correctly.

The temperature does not reach the set value

Please make sure that the inner wall is not frosted too thick. Please make sure that the door is closed tightly and don't open it too many times during a short time. Please don't put too many items in at one time. Please make sure that the ambinet temperature is not too high. Please make sure the filter screen is not blocked.

High noise

Please make sure that the freezer body is placed on a flat ground. Please make sure that the freezer body does not contact the wall.

High ambient temperature alarm

Cause: The ambient temperature is higher than 32°C or the surrounding of the freezer body is too close to the wall, causing poor ventilation effect. Solution: Please ensure the distance between the freezer body and the wall be at least 30 cm, and the vent shall not be blocked. Clean the filter screen frequently. Pay attention to room ventilation or turn on the air conditioner in the hot summer.

The following conditions are not faults When the compressor starts and stops, the equipment parts will make a slight impact sound; Slight sound of running water caused by refrigerant flowing in the pipeline; In rainy and humid seasons, the surface of the freezer body may be frosted, which can be wiped off with a dry cloth; The interval between two door openings shall be more than 5 minutes, otherwise, the hot air will enter the freezer
body, and the negative pressure caused by the sharp drop in temperature will cause difficulty in door opening; The inner side of the liner opening of the equipment is a stress relief area at ultra low temperature, and there will be
slight cracks under the condition of high and low temperature alteration, which is a normal phenomenon and the freezer can be used normally. When the LCD screen flashes during printing or use for a period of time, it is the normal flashing for data reading or the display screen refresh during printing. If the display screen shows abnormality or alarm during start-up, it means that the control panel has not completely read the data, and the display will return to be normal after a few seconds. If the data reading fails, please turn off the power and restart the freezer.

Warning:
¿ This product adopts flammable working medium, and it is forbidden to disassemble and repair it without authorization (especially the compressor, refrigeration pipeline and other related parts). If there is any fault, it must be repaired by MELING BIOMEDICAL Service Center.
Notes:
¿ The equipment can only be repaired, maintained or improved by the engineers certified by MELING BIOMEDICAL, so as to ensure the normal operation of the equipment and the compliance with corresponding safety standards.
¿ Please clean and disinfect the equipment before notifying the maintenance engineer; During the warranty period of the equipment, the Company will not undertake the warranty obligation if the fault or damage is caused by improper use of the user.
¿ Ambient temperature for storage: -40°C ~ +55°C, relative humidity: 10% ~ 90%.

10. Specifications

Model

Ambient Climate temperature type

Refrigerant

(Rated) voltage
(V~)

Rated frequency
(Hz)

Temp Range
(°C)

(Rated) Net

Volume current Weight

(L)

(A)

(kg)

Exterior dimensions (DxWxH)
(mm)

DW-HL398 16~32°C

Mixture Gas

220-230

DW-HL398S 16~32°C

Mixture Gas

220-230

DW-HL398SA 16~32°C

Mixture Gas

220-230

DW-HL528 16~32°C

Mixture Gas

220-230

DW-HL528S 16~32°C

Mixture Gas

220-230

DW-HL528SA 16~32°C

Mixture Gas

220-230

DW-HL678 16~32°C

Mixture Gas

220-230

DW-HL678S 16~32°C

Mixture Gas

220-230

DW-HL678SA 16~32°C

Mixture Gas

220-230

DW-HL778 16~32°C

Mixture Gas

220-230

DW-HL778S 16~32°C

Mixture Gas

220-230

DW-HL778SA 16~32°C

Mixture Gas

220-230

DW-HL858 16~32°C

Mixture Gas

220-230

DW-HL858S 16~32°C

Mixture Gas

220-230

DW-HL858SA 16~32°C

Mixture Gas

220-230

DW-HL1008 16~32°C

Mixture Gas

220-230

DW-HL1008S 16~32°C

Mixture Gas

220-230

DW-HL1008SA 16~32°C

Mixture Gas

220-230

-40~-86 398 5.46 237

-40~-86 398

237

-40~-86 398 5.46 237

-40~-86 528 6.1

286

-40~-86 528 6.57 286

-40~-86 528 6.1

286

-40~-86 678 8.9

330

-40~-86 678 9.1

330

-40~-86 678 8.9

330

-40~-86 778 9.31 365

-40~-86 858 10.86 390

-40~-86 1008 11.25 426

-40~-86 1008 11.8 426

-40~-86 1008 11.25 426

1041X785X1947 1041X785X1947 1041X785X1947 1041X930X1947 1041X930X1947 1041X930X1947 1025X1090X1955 1025X1090X1955 1025X1090X1955 1025X1205X1955 1025X1205X1955 1025X1205X1955 1025X1217X1994 1025X1217X1994 1025X1217X1994 1025X1362X1994 1025X1362X1994 1025X1362X1994

Model

Ambient temperature

Climate type

Refrigerant

(Rated) voltage
(V~)

Rated frequency
(Hz)

Temp Range
(°C)

(Rated) Net

Volume current Weight

(L)

(A)

(kg)

Exterior dimensions (DxWxH)
(mm)

DW-HL398 16~32°C

Mixture Gas

230

DW-HL398SA 16~32°C

Mixture Gas

230

DW-HL528 16~32°C

Mixture Gas

230

DW-HL528SA 16~32°C

Mixture Gas

230

-40~-86 398 5.46 237

-40~-86 528 6.1

286

-40~-86 528 6.1

286

1041X785X1947 1041X785X1947 1041X930X1947 1041X930X1947

DW-HL678 16~32°C

Mixture Gas

230

-40~-86 678 8.9

330

1025X1090X1955

DW-HL678SA 16~32°C

Mixture Gas

230

-40~-86 678 8.9

330

1025X1090X1955

DW-HL778 16~32°C

Mixture Gas

230

-40~-86 778 9.31 365

1025X1205X1955

DW-HL778SA 16~32°C

Mixture Gas

230

DW-HL858 16~32°C

Mixture Gas

230

DW-HL858SA 16~32°C

Mixture Gas

230

DW-HL1008 16~32°C

Mixture Gas

230

-40~-86 778 9.31 365

-40~-86 858 10.86 390

-40~-86 1008 11.25 426

1025X1205X1955 1025X1217X1994 1025X1217X1994 1025X1362X1994

DW-HL1008SA 16~32°C

Mixture Gas

230

-40~-86 1008 11.25 426

1025X1362X1994

Model

Ambient temperature

Climate type

Refrigerant

(Rated) voltage
(V~)

Rated frequency
(Hz)

Temp Range
(°C)

(Rated) Net

Volume current Weight

(L)

(A)

(kg)

DW-HW50HC 16~32°C

Mixture Gas

220-240

-40~-86

5.48

Exterior dimensions (Basic payment) (DxWxH) (mm)
606X650X1080

DW-HW50 16~32°C

Mixture Gas

220-240

-40~-86

5.48

606X650X1080

DW-HL398HC 16~32°C

Mixture Gas

220-240

-40~-86 398

8.69

247

1041X785X1947

DW-HL398M 16~32°C

Mixture Gas

220-240

-40~-86 398

8.69

247

1041X785X1947

DW-HL398 16~32°C

Mixture Gas

220-240

-40~-86 398

8.69

247

1041X785X1947

DW-HL528HC 16~32°C

Mixture Gas

220-240

-40~-86 528

9.2

296

1041X930X1947

DW-HL528M 16~32°C

Mixture Gas

220-240

-40~-86 528

9.2

296

1041X930X1947

DW-HL528 16~32°C

Mixture Gas

220-240

-40~-86 528

9.2

296

1041X930X1947

DW-HL678HC 16~32°C

Mixture Gas

220-240

-40~-86 678

9.62

330

DW-HL678M 16~32°C

Mixture Gas

220-240

-40~-86 678

9.62

330

DW-HL678 16~32°C

Mixture Gas

220-240

-40~-86 678

9.62

330

DW-HL778HC 16~32°C

Mixture Gas

220-240

-40~-86 778

10.56

365

DW-HL778M 16~32°C

Mixture Gas

220-240

-40~-86 778

10.56

365

DW-HL778 16~32°C

Mixture Gas

220-240

-40~-86 778

10.56

365

DW-HL858HC 16~32°C

Mixture Gas

220-240

-40~-86 858

11.8

390

DW-HL858M 16~32°C

Mixture Gas

220-240

-40~-86 858

11.8

390

DW-HL858 16~32°C

Mixture Gas

220-240

-40~-86 858

11.8

390

DW-HL1008HC 16~32°C

Mixture Gas

220-240

-40~-86 1008 13.39

426

DW-HL1008M 16~32°C

Mixture Gas

220-240

-40~-86 1008 13.39

426

DW-HL1008 16~32°C

Mixture Gas

220-240

-40~-86 1008 13.39

426

1025X1090X1955 1025X1090X1955 1025X1090X1955 1025X1205X1955 1025X1205X1955 1025X1205X1955 1025X1217X1994 1025X1217X1994 1025X1217X1994 1025X1362X1994 1025X1362X1994 1025X1362X1994

Model

Ambient temperat
ure

Climate type

Refrigerant and
loading amount

(Rated) voltage
(V~)

Rated frequency
(Hz)

Tempt Range (°C)

Volume (L)

(Rated) Current
(A)

Net Weight (kg)

Exterior Dimensions
(DxWxH) (mm)

DW-HL50 16~32°C N

Mixture 220-240 Gas

DW-HL50HC 16~32°C N

Mixture 220-240 Gas

DW-HW50 16~32°C N

Mixture 220-240 Gas

DW-HW50HC 16~32°C N

Mixture 220-240 Gas

DW-HL100 16~32°C N

Mixture Gas

220-240

DW-HL100HC 16~32°C N

Mixture 220-240 Gas

DW-HW138 16~32°C N

Mixture Gas

220-240

DW-HL218 16~32°C N

Mixture Gas

220-240

DW-HL218HC 16~32°C N

Mixture 220-240 Gas

DW-HW328 16~32°C N

Mixture Gas

220-240

DW-HW328 16~32°C N

Mixture Gas

220-240

DW-HW328 16~32°C N

Mixture Gas

220-240

DW-HL340 16~32°C N

Mixture Gas

220-240

DW-HW668 16~32°C N

Mixture Gas

220-240

DW-HW668 16~32°C N

Mixture Gas

220-240

-40~-86

5.42

104

700×951×757

-40~-86

5.42

104

700×951×757

-40~-86

5.48

606×650×1080

-40~-86

5.48

606×650×1080

-40~-86

100

4.75

145

742×1066×820

-40~-86

100

5.57

145

742×1066×820

-40~-86

138

5.78

200

890×1328×1025

-40~-86

218

5.96

218

976×862×1555

-40~-86

218

6.53

218

976×862×1555

-40~-86

328

-40~-86

328

-40~-86

328

-40~-86

340

-40~-86

668

-40~-86

668

5.6

280

890×2038×1025

5.6

SC18MLX 262

890×2038×1025

5.6

NT6226GK 280

890×2038×1025

5.32

208

895×755×1982

9.5

SC18MLX 340

1180×2008×1041

9.5

NT6226GK 352

1180×2008×1041

Model

Ambient temperature

Climate type

Refrigerant

(Rated) voltage
(v~)

Rated frequency
(Hz)

Temp Range
(°C)

Volume (L)

(Rated) current
(A)

Net Weight
(kg)

Exterior dimensions (DxWxH)
(mm)

DW-HL50

16~32°C

Mixture Gas

110

DW-HL100 16~32°C

Mixture Gas

110

DW-HW50 16~32°C

Mixture Gas

110

DW-HL398 16~32°C

Mixture Gas

110

DW-HL398SA 16~32°C

Mixture Gas

110

DW-HL528 16~32°C

Mixture Gas

110

60 -40~-86 50

60 -40~-86 100

131

60 -40~-86 50

9.3

60 -40~-86 398 13.8 237

60 -40~-86 528 13.2 286

700X951X757 742X1066X820 606X650X1080 1041X785X1947 1041X785X1947 1041X930X1947

DW-HL528SA 16~32°C

Mixture Gas

110

DW-HL678 16~32°C

Mixture Gas

110

DW-HL678SA 16~32°C

Mixture Gas

110

DW-HL778 16~32°C

Mixture Gas

110

DW-HL778SA 16~32°C

Mixture Gas

110

60 -40~-86 528 13.2 286 60 -40~-86 678 14.8 330 60 -40~-86 678 14.8 330 60 -40~-86 778 14.0 365 60 -40~-86 778 14.0 365

1041X930X1947 1025X1090X1955 1025X1090X1955 1025X1205X1955 1025X1205X1955

Model

Ambient temperature

Climate type

Refrigerant

(Rated) voltage
(V~)

Rated frequency
(Hz)

Temp Range
(°C)

(Rated) Net

Volume current Weight

(L)

(A)

(kg)

Exterior dimensions (DxWxH)
(mm)

DW-HL398 16~32°C

Mixture Gas

220-240

-40~-86 398 8.8

237

DW-HL398SA 16~32°C

Mixture Gas

220-240

-40~-86 398 8.8

237

DW-HL528 16~32°C

Mixture Gas

220-240

-40~-86 528 8.7

286

DW-HL528SA 16~32°C

Mixture Gas

220-240

-40~-86 528 8.7

286

1041X785X1947 1041X785X1947 1041X930X1947 1041X930X1947

DW-HL678 16~32°C

Mixture Gas

220-240

DW-HL678SA 16~32°C

Mixture Gas

220-240

DW-HL778 16~32°C

Mixture Gas

220-240

DW-HL778SA 16~32°C

Mixture Gas

220-240

DW-HL858 16~32°C

Mixture Gas

220-240

DW-HL858SA 16~32°C

Mixture Gas

220-240

DW-HL1008 16~32°C

Mixture Gas

220-240

-40~-86 678 10.13 330

-40~-86 778 9.91 365

-40~-86 858

390

-40~-86 858

390

-40~-86 1008 13

426

1025X1090X1955 1025X1090X1955 1025X1205X1955 1025X1205X1955 1025X1217X1994 1025X1217X1994 1025X1362X1994

DW-HL1008SA 16~32°C

Mixture Gas

220-240

-40~-86 1008 13

426

1025X1362X1994

* The foaming material of this product is cyclopentane.If optional electromagnetic lock module is selected the height of the whole unit is increased by 45mm.

11. Accessories

Name Operation Manual Certificate of Conformity USB flash drive

Number

Key Card Defrosting shovel

0/2

* The specific accessories shall be subject to the physical objects received.

Zhongke Meiling Cryogenics Company Limited
Address: No 1862 Zishi Road, Hefei City, Anhui, P.R. China Production Address: No.1862 Zishi Road, Economic and Technological Development Zone, Hefei City Post Code: 230601 Email: zkmeiling@zkmeiling.com; technical.service@zkmeiling.com Website: www.melingbiomedical.com Material Code: 890375562 Production Date: See nameplate on the freezer body Prepared in: August 2023
43

References

Ultra Low Temperature Freezer,Lab Refrigerator And Freezer,Pharmacy Refrigerator Freezer

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