COMET H6321 Temperature Humidity CO2 Transmitter
Specifications
- Product Name: CO2 concentration, temperature, humidity regulator with RS232 serial outputModels: H5321, H5324, H6320, H6321
The CO2 concentration, temperature, humidity regulator with RS232 serial output is a device designed to monitor and control the levels of CO2 concentration, temperature, humidity, and other calculated humidity variables. It provides accurate readings and can be interfaced with a PC using TSensor software or through Modbus communication protocol.
Product Usage Instructions
- Regulator Mounting and Connection
- Ensure proper mounting of the regulator in a suitable location where it can effectively monitor the environment.
- Connect the regulator to the power source and any required external devices according to the wiring diagram.
- Dimensions
- Refer to the product manual for detailed dimensions of the regulator to plan for installation space.
- Typical Application Wiring, Connection of Terminals
- Follow the wiring instructions provided in the manual to correctly connect the terminals for typical application scenarios.
- Description of Device Function and Setting
- Understand how to assign values to the output relay and how to operate the regulator when closing the output relay.
- Learn how to change regulator settings using a PC and TSensor software, regulator keys, or Modbus communication protocol.
- Extended Setting Mode
- Explore the extended setting mode for more advanced configurations of the regulator.
- Restore to Factory Default
- If needed, follow the instructions to restore the regulator to factory default settings.
- Description of Communication Protocols
- Learn about the communication protocols supported by the regulator, including MODBUS RTU and protocols compatible with ADVANTECH-ADAM standard.
- Error States of the Device
- Familiarize yourself with the possible error states of the device and how to troubleshoot them.
- Readings on CD Display
- View and interpret the readings displayed on the CD display of the regulator.
- Preventive Maintenance and Calibration
- Perform regular preventive maintenance and calibration as recommended in the manual to ensure accurate readings and optimal performance.
FAQs
Q: How do I calibrate the CO2 concentration sensor?
A: Calibration instructions can be found in the user manual. Typically, calibration involves exposing the sensor to known CO2 concentrations and adjusting as necessary.
Q: Can I use this regulator outdoors?
A: It is recommended to use the regulator in indoor environments to prevent damage from exposure to extreme weather conditions.
Q: How often should I perform maintenance on the regulator?
A: Regular maintenance should be performed according to the schedule outlined in the manual. This may include cleaning, calibration checks, and component inspections.
Q: Can I connect multiple regulators together for synchronized operation?
A: Yes, multiple regulators can be connected and synchronized using appropriate communication protocols and settings.
“`
CO2 concentration, temperature, humidity and other calculated humidity variables regulator
with RS232 serial output H5321 H5324 H6320 H6321
Instruction Manual
February 2025
General safety rules
The following summary is designed to prevent injury hazards or device damage. Operate the instrument in accordance with this manual to prevent electric trauma.
Service should be performed by a qualified person only. Connect and disconnect correctly. Do not connect and disconnect a lead-in cables if the device is
under electric voltage. Do not use the instrument without the cover. Do not use the instrument if it does not work correctly. If the instrument seems not to work
correctly, have it checked by a qualified service person. Do not use the instrument in an explosive environment. Read instruction manual before the first device connection, please.
Models marked HxxxxZ are non-standard versions of the devices. Description is not included in this manual.
Copyright: COMET SYSTEM, Ltd. It is prohibited to copy and edit this instruction manual and make any changes at all without explicit agreement of COMET SYSTEM, Ltd. All rights reserved.
COMET SYSTEM, Ltd makes constant development and improvement of all its products. That is why it reserves the right to make any technical changes on the device/product without previous notice.
Manufacturer is not responsible for damages caused by using the device in conflict with this manual. To damages caused by using the device in conflict with this manual cannot be provided free repairs during the warranty period.
Contact the manufacturer of this device: COMET SYSTEM, s.r.o. Bezrucova 2901 756 61 Roznov pod Radhostm Czech Republic www.cometsystem.com
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General description
The regulators are designed for online measurement of temperature (°C or °F), relative humidity and carbon dioxide concentration of air without aggressive ingredients. Measured temperature and relative humidity are recomputed to following humidity expression: dew point temperature, absolute humidity, specific humidity, mixing ratio and specific enthalpy.
The regulators are designed to be operated in a chemically non-aggressive environment.
Type H5321 H5324 H6320 H6321
Temperature
–
Humidity
–
CO2 Computed value
–
–
The device is equipped with two relay outputs for alarming or controlling of external devices. It is possible to assign any input value to each relay, to set comparing limit, delay, hysteresis, acoustic alarm or change its status by far control with using of Modbus communication protocol. The device communicates via link RS232.
Supported communication protocols are Modbus RTU and protocol compatible with standard Advantech-ADAM. Devices are preset from manufacturer to Modbus RTU communication protocol. If you would like to use different communication protocol then Modbus RTU, it is necessary preset them see latter. Measured and computed values are displayed on dual line LCD. It is also possible to display both readings with cyclic overwriting in 4 seconds interval. Display can be also switched OFF totally. On the left LCD side there are placed three LEDs for CO2 zone level indication.
Regulator mounting and connection
Regulators are designed for wall mounting. Device must be mounted on the plane surface to prevent its deformation. Mounting holes and connection terminals are accessible after demounting of four screws in the corners of the box and removing the lid. There is recommended to use screws with half round head with cross-recessed screw ST 3.9 (DIN 7981). External probe for measuring the concentration of CO2 unpack and connect to the device.
Devices are supplied with cable (1.5 m) equipped with CANNON 9 connector for connection to RS232 interface.
Lace the lead-in cables with outer diameter of 3 to 6.5 mm through the glands at the case wall and connect them according schematic below. Terminals are self-clamping and can be opened by a suitable screwdriver. For the opening, insert the screwdriver to smaller terminal hole and lever by him. Do not forget to tighten glands and case lid with inserted packing after cables connecting. Insert attached plug into unused cable glands too. Do not connect the regulator under voltage.
It is not recommended to use the device H6320 and external RH+T probe of H6321 regulator for long time under condensation
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conditions. It could be the cause of water steam condensation inside the sensor’s cover into water phase. This liquid phase stays inside sensor’s cover and can’t escape from the cover easily. It can dramatically increase response time to relative humidity change. If water condensation occurs for longer time it can cause sensor damage. Similar effect can occur under water aerosol conditions.
The communication cable must be placed as far as possible from potential interference sources. Electrical system (wiring) may do only worker with required qualification by rules in operation.
Dimensions
H5321
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5
H5324
H6320
6
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H6321
4. Typical application wiring, connection of terminals
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Description of device function and setting
Information from regulator is available directly through LCD or you can read them with one of next communication protocols ( Modbus RTU, Advantech-ADAM ).
5.1. Device setting from the manufacturer
communication protocol:
Modbus RTU
regulator address:
1
communication speed:
9600Bd, no parity, 2 stop bits
Value assigned to Relay1 and Relay2: none
Password for setting through keys (PASS): 0000
LCD display:
on
value shown at first LCD line:
temperature / CO2 – by device type
value shown at second LCD line:
relative humidity / dew point temp. – by device type
temperature unit:
°C
computed value preset:
dew point temperature
relay response for error:
stay unchanged at previous condition
acoustic alarm:
off
LED indication of CO2 concentration
up to 1000 ppm lights green LED, between 1000 and
1200 ppm lights yellow LED and over 1200 ppm
lights red LED
5.2. Relay outputs
Regulator is equipped with two relay outputs. It is possible to assign any input or computed value
or “Far condition” (see chapter ” Far controlling of output relays status ” at page 18) to each relay,
to set comparing alarm limit, if the relay may close if measured value is higher (Hi) or lower (Lo)
than preset limit, delay for while must be preset condition true before relay close its contact and
hysteresis for return to open status. For binary inputs: if it is preset to ,,HI” then output relay is closed
when input contact is opened, if it is preset to ,,Lo” then output relay is closed when input contact is
closed. Each relay status is indicated with LED diode and shown on LCD with corresponding symbols
,,
” or ,,
“.
Terminal block for connecting the relays is equipped with terminals GND, which are connected
to the power supply of the device (see chapter “Typical application wiring, connection of terminals”).
When you need to use relays to switching the voltage identical with the supply voltage of the device,
you can use jumpers J1 and J2 for interconnection the power supply of the device directly with the
common contacts of the relays. This modification is used in devices with serial number higher
than 16981000 (the wiring diagram of the relay contacts for devices with serial number lower than
16981000 is given in the “Appendix B”).
The devices are equipped with two relays that are not intended for direct switching power circuits
or mains voltage. If necessary, use suitable type of external relay (an example of wiring is given in
the “Appendix A”).
5.3. Carbon dioxide concentration measurement
A multiple point CO2 and temperature adjustment procedure leads to excellent CO2 measurement accuracy over the entire temperature working range; this is a must for process control and outdoor applications. The dual wavelength NDIR CO2 sensing procedure compensates automatically for
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ageing effects. The CO2 module is highly resistant to pollution and offers maintenance free operation and outstanding long term stability. Measured values can be read in ,,SLOW mode” (filtered, averaged) or in ,,FAST mode” (current values without averaging). SLOW mode has advantages in applications like climate control because of filtering short time peaks. As an example exhaled air
from an employee passing the sensor could affect the climate control negatively with a short response
time because the control would trigger a change of the ventilation based on this one-time measurement. On the contrary in ,,FAST mode” no software filter is used for calculating the output value. This fact adds a noise of typ. ±30ppm which has to be considered in terms of accuracy.
After power up there is internal check in progress and takes about 20 s. During this time LCD
display shows (—-) instead of CO2 concentration value. Parameter setting description is into chapter “Regulator setting change” at page 11.
5.4. Actual regulator preset
It is possible to display actual regulator preset on its LCD display by
pressing of ,,” key. If ,,Output relay alarm condition configuration with
using of Modbus communication protocol” is active (see chapter 6.1.4 at page 18), then device’s LCD display shows text ,,bloc”. It means, device’s
keyboard is disabled for time of remote control (setting change), see chapter
6.1.5 at page 18. LCD shows information about Relay1 and then Relay2
setting step by step. Information about Relay1 are indicated with symbol ,,
“, for Relay2
with symbol ,,
” (at right top corner of LCD). It is possible to edit parameters after
pressing ,,SET” key and entering of correct password ,,PASS” see chapter Change of “Password
for setting through keys” (PASS) at page 13. Following examples are for Relay1 setting, similarly are displayed values for Relay2. Pressing of ,,ESC” key ends this mode and switch to actual value
displaying, the same occur if more than 20 s is not pressed any key.
5.4.1. Value assigned to output relay
None, relay is still off
Temperature at °C
Relative humidity
Computed value dew point temperature CO2 concentration
Far condition 0
Far condition 1
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FAR0 ,,far condition 0″: after device’s power on the relay is open FAR1 ,,far condition 1″: after device’s power on the relay is close If “far condition” is assigned to output relay, then there is possible to change the output relay status by Modbus communication protocol
only. See chapter “Far controlling of output relays status at page 18.
5.4.2. When close output relay
High limit ,,HI” the relay closes when measured value exceeds preset ,,high limit” for longer time than preset ,,delay time”. Relay goes open when measured value decrease under ,,high limit” value minus the ,,hysteresis” value. See example.
High limit ,,HI”
Delay [s]
Hysteresis
Low limit ,,Lo” the relay closes when measured value falls below preset ,,low limit” for longer time than preset ,,delay time”. Relay goes open when measured value exceeds ,,low limit” value plus the ,,hysteresis” value. See example.
Low limit ,,Lo”
Delay [s]
Hysteresis
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5.5. Regulator setting change
5.5.1. Setting with PC and TSensor software
User’s software TSensor provides setting of all regulator parameters. The program is available free to download at web page www.cometsystem.com. Run the TSensor program and follow the program instructions. Regulator includes hardware write protection of internal setting , new setting is possible to write only while:
1. during write period press ,,SET” key do requested setting in TSensor software, press ,,SET” key on regulator and keep it down, then click on the button ,,Save Changes” into TSensor software and after end of write release ,,SET” key, or
2. jumper placed nearby keys is closed (jumper is accessible after demounting of four screws in the corners of the box and removing the lid ). This jumper is suitable e.g. until device adjustment is in process and regulator is placed into calibration box and keys are not accessible. Don’t forget to remove (open) jumper after procedure finish (restore write protection)
TSensor software supports to make the adjustment of the regulator too. This procedure is described at file ,,Calibration manual.pdf” which is installed commonly with the software.
5.5.2. Setting with using regulator keys
If ,,Actual regulator preset” is displayed (see chapter “Actual regulator preset” at page 9), it is possible to enter into edit mode and edit displayed value by pressing ,,SET” key. Then you are asked for valid password (PASS). You can edit selected value if right password is entered. During value editing there is range check executed and edited value is still compared with limits for corresponding value (range). If inserted value is higher or lower then edited number is automatically changed to its maximum / minimum value for possible range see chapter ,,Technical parameters” at page 23. Value can be changed with using ,,” and ,,” keys. Edited value is switched in “round” -9, -8, -7, …-2, -1, 0, 1, 2, …8, 9. To edit next number digit press ,,SET” key, for moving back to previous digit press ,,ESC” key. Edited value is stored by next ,,SET” key pressing. It is possible to cancel editing by pressing ,,ESC” key if necessary. If valid password is once inserted right, then there is possible to edit next items without asking for password insertion again, till “Actual regulator preset” is left (till actual measured values are shown). With new entering into edit mode it is necessary to enter Password again. Default password setting is preset from manufacturer to 0000, password change is possible into ,,Extended setting”. During edit mode regulator still works and changes are valid immediately after its storing it is NOT necessary to restart regulator.
5.5.3. Setting with using of Modbus communication protocol
See chapter “Output relay alarm condition configuration with using of Modbus communication protocol 2 ” at page 18.
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5.6. Extended setting mode
During regulator operation it is possible to change parameters available through “Actual regulator preset” only (see chapter 5.4 at page 9). Rest of regulator parameters are available through “Extended setting mode”. In this mode regulator does NOT communicate, does NOT do any measurements and does NOT service output relays. To leave this mode press ,,ESC” key and open jumper nearby keys. To enter into Extended setting mode do following steps:
1. disconnect power supply 2. demount four screws in the corners of the box and remove the lid 3. closed jumper placed nearby keys 4. press ,,” and ,,” keys together and keep them down 5. connect power supply to regulator you should see message ,,SEL” on the top line of LCD and
on the bottom line you should see number of Firmware version (e.g. 0404) 6. release ,,” and ,,” keys you are into “Extended setting mode” now
Use ,,” and ,,” keys to inspect each items. If you want to change some shown item then press ,,SET” key, item starts blink. Now you can edit setting with using ,,” and ,,” keys. To store preset value press ,,SET” key. Press ,,ESC” key to leave editing (changing) without save last stored value is kept.
Acoustic alarm assign to Relay1 acoustic indication of Relay1 is OFF
close of Relay1 contact starts acoustic indication
Acoustic alarm assign to Relay2 acoustic indication of Relay2 is OFF
close of Relay2 contact starts acoustic indication
Acoustic alarm deactivation
activated acoustic alarm is possible to deactivate by pressing ,,ESC” key
acoustic alarm is still activated for all time and it is impossible to deactivate it
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Relay response for error
Regulator continuously checks its state during operation. In case error of assigned value measurement is found then output Relay1 (Relay2):
stays unchanged (in previous
status)
Relay1 switch OFF
Relay1 switch On
stays unchanged (in previous
status)
Relay2 switch OFF
Relay2 switch On
Change of “Password for setting through keys” (PASS)
This item shows actual password setting. It is possible to change it after ,,SET” key pressing. It is number from range 19999 to +19999
password setting
Choice of communication protocol
Choice of communication protocol for communication with master device
protocol Modbus
protocol Advantech-Adam without check sum
protocol Advantech-Adam with check sum
Communication speed Communication speed for preset communication protocol communication speed setting
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Temperature unit choice
It is possible to measure temperature at °C or °F. There is shown preset unit. It is possible to change it after ,,SET” key pressing.
preset to °C
preset to °F
CO2 measurement mode selection
This item provides to choice if measured value is displayed and read in “SLOW” or “FAST” mode. “FAST” mode provides last measured value without averaging; this means that no software filter is used for calculating the output value. “SLOW” mode provides value averaged from last 11 “FAST” measured values.
averaged value ,,SLOW” mode
current value without averaging ,,FAST” mode
CO2 zone level indication setup
Whole measuring range can be divided into three areas. Each active
area there is indicated by green, yellow or red LED depends on actual
measured value. It is done by two boundary limits setting. ,,YELL”
limit sets boundary between green and yellow indication. It means that
if actual measured value is lower than ,,YELL” limit, there is green
LED active. If actual measured value is higher than ,,YELL” limit, then
there is yellow LED active. Yellow LED lights until actual measured value exceeds ,,RED” limit. If
actual value is higher than ,,RED” limit, red LED is active. If you don’t want to use this indication
then set “YELL” limit to 0.
.
,,YELLOW” limit setting
,,RED” limit setting
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Show temperature at LCD display
This item provides to choice if actual measured temperature may be displayed at LCD display or not. It is possible to change it after ,,SET” key pressing.
show value on LCD
don’t show value on LCD
Show relative humidity at LCD display
This item provides to choice if actual measured relative humidity may be displayed at LCD display or not. It is possible to change it after ,,SET” key pressing.
show value on LCD
don’t show value on LCD
Show computed value at LCD display
This item provides to choice if actual computed value may be displayed at LCD display or not. There is shown the name of computed value on the top LCD line see “Computed value selection” below. It is possible to change it after ,,SET” key pressing.
show value on LCD
don’t show value on LCD
Show CO2 concentration at LCD display
This item provides to choice if CO2 value may be displayed at LCD display or not. It is possible to change it after ,,SET” key pressing.
show value on LCD
don’t show value on LCD
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Computed value selection
It shows the actually selected computed value name. It is possible to change it after ,,SET” key pressing. There is possible choice one of the following computed values:
dew point temperature absolute humidity
mixing ratio
specific humidity
specific enthalpy
5.7. Restore to ,,Factory default”
This item provides regulator restoring to factory setting. Press ,,SET” key, select ,,YES” and confirm it by pressing of ,,SET” key. It reset regulator parameters to following values:
communication protocol: regulator address: communication speed: value assigned to Relay1 and Relay2: password for setting through keys: display: value shown at first LCD line: value shown at second LCD line: temperature unit: computed value preset:
Modbus RTU 1 9600Bd, no parity, 2 stop bits none 0000 on temperature / CO2 – by device type relative humidity / dew point temp. by device type °C dew point temperature
obnova nastavení regulátoru od výrobce
Description of communication protocols
Detailed description of each communication protocols including examples of communication is available in individual document “Description of communication protocols”, which is available to download at www.cometsystem.cz, see detailed description of appropriate device type. After switching ON the power of the device it can last up to 3 s before the device starts to communicate and measure !!!
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6.1. Modbus RTU
Control units communicate on master-slave principle in half-duplex operation. Only master can send request and only addressed device responds. During sending of request no other slave station should respond. During communication, data transfer proceeds in binary format. Each Byte is sent as eight bit data word in format: 1 start bit, data word 8 bit (LSB first), 2 stop bits1, without parity. Device supports communication speed from 110Bd to 115200Bd.
Sent request and response have syntax: ADDRESS OF DEVICE FUNCTION Modbus CRC
6.1.1. Supported functions 03 (0x03): Reading of 16-bit registers (Read Holding Registers) 04 (0x04): Reading of 16-bit input gates (Read Input Registers) 06 (0x06): Setting of one 16-bit register (Write Register) 16 (0x10): Setting of more 16-bit registers (Write Multiple Registers)
6.1.2. Jumper Jumper (placed nearby keys) is accessible after demounting of four screws in the corners of the
box and removing the lid. If communication protocol Modbus is selected the function of jumper is as follows:
· Jumper opened device memory is protected from writing, from device side it is only enabled to read measured value, writing to memory is disabled (no change of settings is enabled)
· Jumper closed writing to regulator memory is enabled
6.1.3. Modbus registers of the regulator
Variable
measured temperature measured relative humidity computed value* CO2 concentration displayed on LCD Relay1 status [0/1] (Alarm 1) Relay2 status [0/1](Alarm 2) CO2 concentration ,,FAST” mode CO2 concentration ,,SLOW” mode status word (described below) device serial number Hi device serial number Lo firmware version Hi firmware version Lo device address communication speed code
Unit
[°C/°F]* [%]
ppm [-] [-] ppm ppm [-] [-] [-] [-] [-] [-] [-]
Address [hex]X 0x0031 0x0032 0x0033 0x0034 0x003B 0x003C 0x0054 0x0055 0x0007 0x1035 0x1036 0x3001 0x3002 0x2001 0x2002
Address [dec]X
49 50 51 52 59 60 84 85 7 4149 4150 12289 12290 8193 8194
Format Size Status
Int*10 Int*10 Int*10
Int Int Int Int Int Int BCD BCD BCD BCD Int Int
BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16 BIN16
R R R R R R R R R R R R R R/W** R/W**
1 Device sends two stop bits, for receive one stop bit is enough.
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Legend:
· * depends on device setting (by User’s software)
· Int*10 register is in format integer *10 (likewise *100, *1000)
· R register is designed only for reading
· W** register is designed for writing, but direct write is not available, for details see
description of communication protocols
·
x at transmit are register addresses indexed from zero – ,,zero based addressing”.
For example ,,measured temperature” with Modbus address 0x31 is physically sent
along data bus as value 0x30. You make sure of correct addressing with the aid of
Master device documentation or experimentally (e.g. for ,,measured temperature” try
to use address 0x31 or 0x30).
·
Status word: 16b value return, bite description:
Bit0
0/1 jumper open/closed
Bit1
– unused
Bit2
0 always 0
Bit3
0/1 Relay1 open/closed
Bit4
0/1 Relay2 open/closed
Bit5
0/1 internal acoustic alarm status
Bit6 to 15 – unused
Note: In case there is a need for reading of measured values from the device with higher resolution than one decimal, measured values in device are stored also in ,,Float” format, which is not directly compatible with IEEE754.
6.1.4. Far controlling of output relays status 2
There is possible to control output relay status (open/close) with using of Modbus communication protocol. To this function enable, there is necessary to assign one of following options to relay:
· FAR0 ,,Far condition 0″, it means, after power up output relay will be open, or · FAR1 ,,Far condition 1″, it means, after power up output relay will be close. Then there is possible to change relay status by Modbus communication protocol command by requested value writing to following addresses:
Function
Far condition for Relay1 Far condition for Relay2
Address [hex]X 0x0042 0x0043
Address [dec]X
Description
66 0 – relay open, 1 – relay closed
67 0 – relay open, 1 – relay closed
Status
R/W R/W
6.1.5. Output relay alarm condition configuration with using of Modbus communication protocol 2
With Modbus communication protocol there is possible to set regulator’s parameters described at chapter “Actual regulator preset” at page 9. Follow next steps:
2 This function is available from firmware version 04.06. If older firmware used, update your firmware or contact device’s distributor.
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1) To address 0x0044 (68) write value1 it enables Modbus setting. By the way it blocks regulator’s keyboard local keyboard is blocked during remote control setting change.
2) Write the desired settings / changes to the addresses from 0x0045 (69) to 0x004E (78). New setting can be done simultaneously or each register can be written alone
3) To address 0x004F (79) write value 1. Once this step is done, new setting is physically stored into device memory (confirm change). Then registers 0x004F (79) and 0x0044 (68) are automatically cleared (zero). It automatically unlocks the keyboard too.
Whole setting process can be cancelled by writing value 0 to address 0x0044 (68). At this time no changes are stored and last setting stays valid.
Function
Unit
Address [hex]X
Address [dec]X
Description
Status
Modbus Remote Control
0 … disable
[-] 0x004468
1 … enable (for this time device’s keyboard is blocked, if key is pressed, message BLOC
R/W
is shown)
0 … Off
1 … temperature
2 … relative humidity
Value
3 … atmospheric pressure (CO2 concentration)
assigned to output
by value
0x0045
69
4 … computed value 5 … unused
R/W
Relay1
6 … unused
7 … unused
8 … Far condition 0
9 … Far condition 1
0 … alarm occurs, when measured value is
When close Relay1
[-] 0x004670
LOWER than preset alarm value 1 … alarm occurs, when measured value is
R/W
HIGHER than preset alarm value
Alarm value for Relay1
by value
0x0047
71
preset alarm value (threshold)
R/W
Delay for Relay1
[sec] 0x004872
Time in seconds Time in seconds that the condition must be valid to evaluate alarm
R/W
Hysteresis of Relay1
by value
0x0049
73
Value witch must be set back below / above a given threshold in order to open the relay
R/W
0 … Off
1 … temperature
2 … relative humidity
Value
3 … atmospheric pressure (CO2 concentration)
assigned to output
by value
0x004A
74
4 … computed value 5 … unused
R/W
Relay2
6 … unused
7 … unused
8 … Far condition 0
9 … Far condition 1
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Function
Unit
Address [hex]X
Address [dec]X
Description
Status
0 … alarm occurs, when measured value is
When close Relay2
[-] 0x004B75
LOWER than preset alarm value 1 … alarm occurs, when measured value is
R/W
HIGHER than preset alarm value
Alarm value for Relay2
by value
0x004C
76
preset alarm value (threshold)
R/W
Delay for Relay2
[sec] 0x004D77
Time in seconds Time in seconds that the condition must be valid to evaluate alarm
R/W
Hysteresis of Relay2
by value
0x004E
78
Value which must be set back below / above a given threshold in order to open the relay
R/W
Read always as 0
Confirm changes
[-] 0x004F79
write 1 … physically stores new setup into device’s memory, at the end the register is
R/W
automatically reset to zero.
All registers contains 16b number. Communication examples are listed in a separate document entitled “Description of communication protocols”.
6.2. Protocol compatible with Advantech-ADAM standard
Control units communicate on master-slave principle in half-duplex operation. Only master can send requests and only addressed device responds. During sending request any of slave devices should respond. During communication data is transferred in ASCII format (in characters). Each Byte is sent as two ASCII characters. Device supports communication speed from 1200Bd to 115200Bd, parameters of communication link are 1 start bit + eight bit data word (LSB first) + 1 stop bit, without parity.
6.2.1. Jumper
Jumper (placed nearby keys) is accessible after demounting of four screws in the corners of the box and removing the lid. If communication protocol compatible with standard Advantech-ADAM is selected, its function is the following:
· If jumper during switching ON the power is closed, device always communicates with following parameters regardless stored setting in the device: communication speed 9600 Bd, without check sum, device address 00h
· If jumper during switching ON the power is not closed, device communicates in accordance with stored setting.
· If jumper is closed during device operation, device temporarily changes its address to 00h, it will communicate in the same communication speed as before closing jumper and will communicate without check sum. After jumper is opened setting of address and check sum is reset in accordance with values stored in the device.
· Communication speed and check sum are possible to change only if jumper is closed. · Jumper closed and button pressed for longer than six seconds causes restoring of
manufacturer setting of communication protocol, i.e. sets Modbus RTU communication protocol, device address sets to 01h and communication speed to 9600Bd (after button press there is “dEF” message blinking at LCD display. Six seconds later message “dEF” stays shown, it means manufacturer setting of communication protocol is done).
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For communication with device which measure more than one value, there is necessary to add at the end of command, number of communication channel, where the measured value is mapped. Command for value reading is #AAx(CRC) CR, where AA is device address and x is number of communication channel by next table:
Measured value
temperature relative humidity computed value barometric pressure (CO2 concentration) status word (described below)* Relay1 status [0/1] Relay2 status [0/1]
Number of communication channel
0 1 2 3 4 5 6
* Status word: 16b value return, bite description:
Bit0 0/1 Bit1 Bit2 0 Bit3 0/1 Bit4 0/1 Bit5 0/1 Bit6 -15 –
jumper open/closed unused always 0 Relay1 open/closed Relay2 open/closed internal acoustic alarm status unused
Error States of the device
Device continuously checks its state during operation. In case error is found LCD displays corresponding error code: Error 0 – first line of LCD displays ,,Err0″. Check sum error of stored setting inside device’s
memory. This error appears if incorrect writing procedure to device’s memory occurred or if damage of calibration data appeared. At this state device does not measure and calculate values. It is a serious error, contact distributor of the device to fix.
Error 1 – measured or calculated value (except concentration of CO2) is over upper limit of allowed full scale range. There is a reading ,,Err1″ on LCD display. Value read from the device is +999.9. This state appears in case of: · Measured temperature is higher than approximately 600°C (i.e. high non-measurable resistance of temperature sensor, probably opened circuit). · Relative humidity is higher than 100%, i.e. damaged humidity sensor, or humidity calculation of humidity is not possible (due to error during temperature measurement). · Computed value calculation of the value is not possible (error during measurement of temperature or relative humidity or value is over range).
The value of CO2 concentration 9999 ppm is correct value!
Error 2 – there is a reading ,,Err2″ on LCD display. Measured or calculated value is below lower limit of allowed full scale range or CO2 concentration measurement error occurred. Value read from the device is -999.9. This state appears in case of: · Measured temperature is lower than approximately -210°C (i.e. low resistance of temperature sensor, probably short circuit). · Relative humidity is lower than 0%, i.e. damaged sensor for measurement of relative humidity, or calculation of humidity is not possible (due to error during temperature measurement).
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· Computed value calculation of computed value is not possible (error during measurement of temperature or relative humidity).
Error 3 – there is a reading ,,Err3″ on LCD display upper line. Error of internal A/D converter appeared (converter does not respond, probably damage of A/D converter). At this state device does not measure temperature and relative humidity. This error does not affect CO2 concentration measurement. It is a serious error, contact distributor of the device.
Error 4 – there is a reading ,,Err4″ on LCD display. It is internal device error during CO2 concentration sensor initialization. Under this condition device does not measure concentration of CO2. Value read from device is -9999 (concentration of CO2). CO2 sensor is probably damaged. It is a serious error, contact distributor of the device. For devices with an external probe CO2G-10 the “Err4” indicates that the probe is not connected.
Error 5, 6 – there is problem with assigned value to output relay, there is some wrong setting (mismatch). This error appears if incorrect writing procedure to device’s memory occurred.
Error 9 – inserted password is not valid, there is shown for short time message “Err9” on LCD display.
Readings on CD display
°C, °F reading next to this symbol is measured temperature or error state of value %RH reading next to this symbol is measured relative humidity or error state of value CO2 ppm reading next to this symbol is measured concentration of CO2 or error state of value. °C / °F DP reading next to this symbol is calculated dew point temperature or error state of value g/m3 reading next to this symbol is calculated absolute humidity or error state of value g/kg reading next to this symbol is calculated specific humidity or mixing ratio (depends on device
setting) or error state of value 3 this symbol is on if jumper is closed If specific enthalpy is selected, there is shown only value (number) without corresponding unit.
9. Preventive maintenance and calibration
Pay heed to recommended calibration interval. Do not subject the device to mechanical stress.
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10. Technical specification
10.1. Technical parameters
10.1.1. Common parameters
Power voltage:
9 to 30 V DC
Power consumption:
1W during normal operation 4W for 50ms with 15 s period
Measuring interval:
temperature, relative humidity . . . . . 0,5s concentration of CO2 . . . . . . . . . . . . 15s
Display switching interval: 4 s (when more than two values are displayed)
Relay outputs:
Amount:
2
Maximal voltage: 50 V
Maximal current: 2A
Maximal power: 60 VA
Relays contact is not designed for direct control of line voltage!
(output relay contact parameters: max 220Vdc, 125Vac, 2A, 60 W, 62.5 VA)
EMC: EN 61326-1, EN 55011
10.1.2. H5321 – CO2 regulator
Concentration of CO2:
Accuracy:
± (100 ppm + 5 % of measuring value) at 25°C (77°F) and 1013 hPa
Range:
0 to 10000 ppm
Temp. dependence: ± (1 + measured value [ppm]/1000) ppm / ºC (-20…45 ºC) (-4…113°F)
Resolution:
1 ppm
Response time:
t63 < 140 s in ,,SLOW” measurement mode
t63 < 75 s in ,,FAST” measurement mode
10.1.3. H5324 – CO2 regulator
Concentration of CO2:
Accuracy:
± (50 ppm + 3 % of measuring value) at 25°C (77°F) and 1013 hPa
Range:
0 to 5000 ppm
Temp. dependence: ± (1 + measured value [ppm]/1000) ppm / ºC (-20…45 ºC) (-4…113°F)
Long term stability: typ. 20 ppm / year
Resolution:
1 ppm
Response time:
t90 < 195 s in ,,SLOW” measurement mode
t90 < 75 s in ,,FAST” measurement mode
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10.1.4. H6320 – temperature, relative humidity and CO2 regulator
Temperature:
Accuracy: ± 0,4 °C (±0,7 °F)
Range:
-30 to +60 °C (-22 to 140 °F)
Resolution: 0,1 °C (0,2 °F)
Relative humidity:
Accuracy: ± 2,5 %RH from 5 to 95 %RH at 23 °C (73,4 °F)
Range:
0 to 100 %RH
Resolution: 0,1 %RH
Concentration of CO2:
Accuracy:
± (50 ppm + 3 % of measuring value) at 25°C (77°F) and 1013 hPa
Range:
0 to 5000 ppm
Temp. dependence: ± (1 + measured value [ppm]/1000) ppm / ºC (-20…45 ºC) (-4…113°F)
Long term stability: typ. 20 ppm / year
Resolution:
1 ppm
Measuring temperature and humidity range is limited in accordance with the graph below.
Response time measurement of temperature and relative humidity with stainless steel mesh
sensor cover (F5200B) and bronze sensor cover (F0000 – selectable option), air flow 1 m/s:
temperature:
t90 < 6 min (temperature step 20 °C (36 °F))
relative humidity: t90 < 30 s (humidity step 65 %RH, constant temperature)
Response time measurement of CO2 concentration:
t90 < 195 s in ,,SLOW” measurement mode t90 < 75 s in ,,FAST” measurement mode
10.1.5. H6321 – temperature, relative humidity and CO2 regulator
Temperature:
Accuracy: ± 0,4 °C (±0,7 °F)
Range:
-30 to +105 °C (-22 to 221 °F), includes probe cable
Resolution: 0,1 °C (0,2 °F)
Relative humidity:
Accuracy: ± 2,5 %RH from 5 to 95 %RH at 23 °C (73,4 °F)
Range:
0 to 100 %RH
Resolution: 0,1 %RH
Concentration of CO2:
Accuracy:
± (100 ppm + 5 % of measuring value) at 25°C (77°F) and 1013 hPa
Range:
0 to 10000 ppm
Temp. dependence: ± (1 + measured value [ppm]/1000) ppm / ºC (-20…45 ºC) (-4…113°F)
Resolution:
1 ppm
Measuring temperature and humidity range is limited in accordance with the graph below.
Response time measurement of temperature and relative humidity with stainless steel mesh
sensor cover (F5200B) and bronze sensor cover (F0000 – selectable option), air flow 1 m/s:
temperature:
t90 < 6 min (temperature step 20 °C (36 °F))
relative humidity: t90 < 30 s (humidity step 65 %RH, constant temperature)
Response time measurement of CO2 concentration:
t63 < 140 s in ,,SLOW” measurement mode t63 < 75 s in ,,FAST” measurement mode
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10.1.6. Value computed from measured relative humidity and temperature
Dew point temperature Range: -60 to +80 °C (-76 to 176 °F) Accuracy: ±1,5°C (±2,7°F) at ambient temperature T<25°C (77°F) and relative
humidity RH >30%, for more details see graphs below
Absolute humidity
Range:
0 to 400 g/m3
Accuracy: ±1,5 g/m3 at ambient temperature T < 25°C (104 °F), for more details see graph
below
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Specific humidity3
Accuracy: ±2g/kg at ambient temperature T < 35°C (95 °F)
Range:
0 to 550 g/kg
Mixing ratio3
Accuracy: ±2g/kg at ambient temperature T < 35°C (95 °F)
Range:
0 to 995 g/kg
Specific enthalpy3
Accuracy: ± 3kJ/kg at ambient temperature T < 25°C (77 °F)
Range:
0 to 995 kJ/kg 4
The values computed from ambient temperature and relative humidity including their accuracy you can exactly determine by the program Conversions. It is free to download at www.cometsystem.cz.
10.1.7. Relative humidity and temperature restriction
10.2. Operating conditions
Operating temperature and relative humidity:
electronics H5321, H6321:
-30 to +80 °C (-22 to 176 °F)
electronics H5324, H6320:
-30 to +60 °C (-22 to 140 °F)
measuring end of stem H6320: -30 to +80 °C (-22 to +176 °F)
CO2 probe H5321, H6321:
-25 to +60 °C (-13 to +140 °F) (fixed installation)
-5 to +60 °C (+23 to +140 °F) (moving use)
RH+T probe H6321:
-30 to +105 ºC (-22 to +221 ºF)
It is recommended to switch off the LCD display at ambient temperatures above 70°C (158°F) around electronics.
3 This value depends on the atmospheric pressure. For computing is used constant value stored in device memory. Default
value preset by manufacturer is 1013hPa and can be changed by user’s software. 4 This maximum is reached under conditions about 70°C/100%RH or 80°C/70%RH
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Operating humidity range:
H5321, H6321:
0 to 100 % RH (no condensation)
H5324, H6320:
5 to 95 % RH (no condensation)
CO2 probe H5321, H6321: 0 to 95 % RH (no condensation)
Operating barometric pressure range 850 to 1100 hPa
Protection: H5321 H5324 H6320 H6321
IP65 (electronics), IP65 (CO2 probe) IP65 (electronics) IP30 (electronics), IP40 (measuring end of stem) IP65 (electronics), IP65 (CO2 probe), IP40 (RH+T probe)
Other environmental conditions (external influences) according to HD 60364-5-51: normal
Recommended calibration interval:
H5321
5 years (CO2)
H5324
5 years (CO2)
H6320
5 years (CO2), 1 year (relative humidity), 2 years (temperature)
H6321
5 years (CO2), 1 year (relative humidity), 2 years (temperature)
Working position: H5321, H6321: H5324: H6320:
negligible with cable glands upwards with sensor cover downwards
Not allowed manipulations: It is not allowed to operate the device under conditions other than specified in technical parameters. Devices are not designed for locations with chemically aggressive environment. Temperature and humidity sensors must not be exposed to direct contact with water or other liquids. It is not allowed to remove the sensor cover to avoid any mechanical damage of the sensors.
Storage conditions: temperature:
relative humidity:
atmospheric pressure:
-40 to +60 °C (-40 to 140 °F) CO2 external probe -25 to +60 °C (-13 to 140 °F)
5 to 95 % RH (no condensation)
CO2 external probe 0 to 95 %RH (no condensation) 700 az 1100 hPa
Dimensions:
see dimensional drawings
Weight: approximately: H5321/1m probe H5321/2m probe H5321/4m probe H5324 H6320 H6321/1m probes H6321/2m probes H6321/4m probes
440 g 470 g 530 g 340 g 360 g 520 g 590 g 730 g
Weight of the device is given without RS232 communication cable (cable weight is 70g).
Material of the case: ASA/ABS
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10.3. End of operation
Device itself (after its life) is necessary to liquidate ecologically according to current legislation for dealing with electronic equipment.
10.4. Technical support and service
The adjustment procedure is described at file ,,Calibration manual.pdf” which is installed commonly with the TSensor software.
Technical support and service is provided by distributor. For contact see warranty certificate.
11. Appendix A
Connection of external power relay
Coil data chart of external power relay:
nominal voltage : max 50V
nominal power: max 60VA
current:
max 2A
12. Appendix B
Wiring diagram of relay contacts for devices with serial number lower than 16981000.
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Documents / Resources
 |
COMET H6321 Temperature Humidity CO2 Transmitter [pdf] Instruction Manual H5321, H5324, H6320, H6321, H6321 Temperature Humidity CO2 Transmitter, Temperature Humidity CO2 Transmitter, Humidity CO2 Transmitter, Transmitter |