804 Handheld Particle Counter
“
Product Information
Specifications
- Model: 804
- Manufacturer: Met One Instruments, Inc.
- Address: 1600 NW Washington Blvd. Grants Pass, OR 97526,
U.S.A. - Contact: Tel: +1 541-471-7111, Fax: +1 541-471-7116, Email:
service@metone.com - Website: https://metone.com
Product Usage Instructions
1. Introduction
Welcome to the Model 804 user manual. This guide will help you
understand how to operate and maintain your device effectively.
2. Setup
Before using the Model 804, ensure it is placed on a stable
surface with proper ventilation. Connect any necessary power
sources or batteries as per the user manual.
3. User Interface
The user interface of Model 804 provides easy navigation through
various functions. Familiarize yourself with the display screen and
buttons for efficient operation.
4. Operation
4.1 Power Up
To power up the device, follow the instructions provided in the
user manual. Ensure all connections are secure before turning on
the Model 804.
4.2 Sample Screen
Once powered on, familiarize yourself with the sample screen
display to understand the information being presented by the
device.
4.3 Sampling
Follow the sampling instructions to collect data using the Model
804. Ensure proper procedures are followed to obtain accurate
results.
5.1 View Settings
Access the settings menu to view and customize various
parameters according to your requirements.
5.2 Edit Settings
Edit settings as needed to tailor the device’s functionality to
specific preferences or operational needs.
6. Serial Communications
Refer to the user manual for instructions on establishing serial
communications with external devices or systems for data
transfer.
7. Maintenance
7.1 Charging the Battery
Follow the recommended procedures for charging the device’s
battery to ensure optimal performance during operation.
7.2 Service Schedule
Maintain a regular service schedule as outlined in the user
manual to keep the Model 804 in top condition for reliable
operation.
7.3 Flash Upgrade
If necessary, perform a flash upgrade following the provided
instructions to keep your device up-to-date with the latest
features and enhancements.
Frequently Asked Questions (FAQ)
Q: Where can I find the serial number of my Model 804?
A: The serial number is typically located on a silver product
label on the unit and also printed on the calibration certificate.
It will begin with a letter followed by a unique five-digit
number.
Q: Is it safe to open the cover of the device?
A: No, there are no user-serviceable parts inside, and opening
the cover could lead to accidental exposure to laser radiation.
Please do not attempt to remove the cover.
“`
MODEL 804 MANUAL
Met One Instruments, Inc
Corporate Sales & Service: 1600 NW Washington Blvd. Grants Pass, OR 97526 Tel 541-471-7111 Fax 541-471-7116 www.metone.com service@metone.com
Copyright Notice
Model 804 Manual
© Copyright 2007-2020 Met One Instruments, Inc. All Rights Reserved Worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language in any form by any means without the express written permission of Met One Instruments, Inc.
Technical Support
Should support still be required after consulting the printed documentation, contact one of the expert Met One Instruments, Inc. Technical Service representatives during normal business hours of 7:00 a.m. to 4:00 p.m. Pacific Standard Time, Monday through Friday. Product warranty information is available at https://metone.com/metone-warranty/. In addition, technical information and service bulletins are often posted on our website. Please contact us and obtain a Return Authorization (RA) number before sending any equipment back to the factory. This allows us to track and schedule service work and to expedite customer service.
Contact Information:
Tel: + 541 471 7111 Fax: + 541 471 7115 Web: https://metone.com Email: service.moi@acoem.com
Address:
Met One Instruments, Inc. 1600 NW Washington Blvd Grants Pass, Oregon 97526 U.S.A.
Please have the instrument serial number available when contacting the manufacturer. On most models manufactured by Met One Instruments, it will be located on a silver product label on the unit, and also printed on the calibration certificate. The serial number will begin with a letter and be followed by a unique five-digit number such as U15915.
NOTICE
CAUTION–Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
WARNING–This product, when properly installed and operated, is considered a Class I laser product. Class I products are not considered to be hazardous.
There are no user serviceable parts located inside the cover of this device.
Do not attempt to remove the cover of this product. Failure to comply with this instruction could cause accidental exposure to laser radiation.
Model 804 Manual
Page 1
804-9800 Rev G
Table of Contents
1. Introduction …………………………………………………………………………………………….. 3
2. Setup ………………………………………………………………………………………………………. 3
2.1. Unpacking…………………………………………………………………………………………………………………. 3 2.2. Layout ………………………………………………………………………………………………………………………. 5 2.3. Default Settings …………………………………………………………………………………………………………. 5 2.4. Initial Operation …………………………………………………………………………………………………………. 6
3. User Interface ………………………………………………………………………………………….. 6
4. Operation ………………………………………………………………………………………………… 6
4.1. Power Up ………………………………………………………………………………………………………………….. 6 4.2. Sample Screen ………………………………………………………………………………………………………….. 6 4.3. Sampling …………………………………………………………………………………………………………………… 7
5. Settings Menu………………………………………………………………………………………….. 8
5.1. View Settings …………………………………………………………………………………………………………….. 9 5.2. Edit Settings…………………………………………………………………………………………………………….. 10
6. Serial Communications ………………………………………………………………………….. 13
6.1. Connection………………………………………………………………………………………………………………. 13 6.2. Commands ……………………………………………………………………………………………………………… 14 6.3. Real Time Output …………………………………………………………………………………………………….. 15 6.4. Comma Separated Value (CSV) ………………………………………………………………………………… 15
7. Maintenance ………………………………………………………………………………………….. 15
7.1. Charging the Battery…………………………………………………………………………………………………. 15 7.2. Service Schedule……………………………………………………………………………………………………… 16 7.3. Flash Upgrade …………………………………………………………………………………………………………. 17
8. Troubleshooting …………………………………………………………………………………….. 17
9. Specifications ………………………………………………………………………………………… 18
Model 804 Manual
Page 2
804-9800 Rev G
1. Introduction
The Model 804 is a small lightweight four channel handheld particle counter. Key features include:
· Simple user interface with multifunction rotary dial (rotate and press) · 8 hours continuous operation · 4 count channels. All channels are user selectable to 1 of 7 preset sizes:
(0.3m, 0.5m, 0.7m, 1.0m, 2.5m, 5.0m and 10m) · Concentration and total count modes · 2 favorite display sizes · Password protection for user settings
2. Setup The following sections cover unpacking, layout and performing a test run to verify operation.
2.1. Unpacking When unpacking the 804 and accessories, inspect the carton for obvious damage. If the carton is damaged notify the carrier. Unpack everything and make a visual inspection of the contents. Standard items (included) are shown in Figure 1 Standard Accessories. Optional accessories are shown in Figure 2 Optional Accessories.
ATTENTION: The included USB drivers must be installed before connecting the 804 USB port to your computer. If the supplied drivers are not installed first, Windows may install generic drivers that are not compatible with this product. See section 6.1.
To install USB drivers: Insert the Comet CD. The install program should run automatically and display the screen below. If an AutoPlay pop-up window appears, select “Run AutoRun.exe”. Finally, select “USB Drivers” to start the install process.
Model 804 Manual
Page 3
804-9800 Rev G
Model 804 Standard Accessories
804
Battery Charger
Power Cord
USB Cable
MOI P/N: 804
Calibration Certificate
MOI P/N: 80116 804 Manual
MOI P/N: 400113
Comet Software CD
MOI P/N: 500787 Quick Guide
MOI P/N: 804-9600
MOI P/N 804-9800
MOI P/N: 80248
MOI P/N 804-9801
Figure 1 Standard Accessories
Zero Filter Kit
Model 804 Optional Accessories
Boot
Carrying Case
Flow Meter Kit
MOI P/N: 80846
MOI P/N: 80450
MOI P/N: 8517
Figure 2 Optional Accessories
MOI P/N: 80530
Model 804 Manual
Page 4
804-9800 Rev G
2.2. Layout The following figure shows the layout of the Model 804 and provides a description of the components.
Inlet Nozzle
Display
Flow Adjust Charger Jack
Keyboar d
USB Port Rotary Dial
Figure 3 804 Layout
Component Display Keyboard Rotary dial Charger Jack
Flow Adjust Inlet Nozzle USB Port
Description 2X16 character LCD display 2 key membrane keypad Multifunction dial (rotate and press) Input jack for external battery charger. This jack charges the internal batteries and provides continuous operating power for the unit. Adjusts the sample flow rate Sample nozzle USB communication port
2.3. Default Settings The 804 comes with the user settings configured as follows.
Parameter Sizes Favorite 1 Favorite 2 Sample Location Sample Mode Sample Time Count Units
Value 0.3, 0.5, 5.0, 10 m 0.3m OFF 1 Manual 60 seconds CF
Model 804 Manual
Page 5
804-9800 Rev G
2.4. Initial Operation
The battery should be charged for 2.5 hours prior to use. Refer to Section 7.1 of this manual for batter charging information.
Complete the following steps to verify proper operation. 1. Press the Power key for 0.5 seconds or more to turn on power. 2. Observe the Startup screen for 3 seconds then the Sample screen (Section 4.2) 3. Press Start / Stop key. The 804 will sample for 1 minute and stop. 4. Observe the counts on the display 5. Rotate the Select dial to view other sizes 6. The unit is ready for use
3. User Interface
The 804 user interface is composed of a rotary dial, 2 button keypad and a LCD display. The keypad and rotary dial are described in the following table.
Control Power Key Start / Stop Key
Select Dial
Description
Power the unit on or off. For power on, press for 0.5 seconds or more. Sample Screen START / STOP a sample event Settings Menu Return to Sample screen Edit Settings Cancel edit mode and return to the Settings Menu Rotate the dial to scroll through selections or change values. Press the dial to select item or value.
4. Operation The following sections cover the basic operation of Model 804.
4.1. Power Up Press the Power key to power up the 804. The first screen shown is the Startup Screen (Figure 4). The Startup Screen displays the product type and company website for approximately 3 seconds before loading the Sample Screen.
Model 804 WWW.METONE.COM Figure 4 Startup Screen
4.1.1. Auto Power Off
The 804 will power down after 5 minutes to preserve battery power providing the unit is stopped (not counting) and there is no keyboard activity or serial communications.
4.2. Sample Screen
The Sample Screen displays sizes, counts, count units, and time remaining. The time remaining is displayed during sample events. The Sample Screen is shown in Figure 5 below.
0.3u 0.5u
2,889 CF 997 60
Count Units (Section 4.3.3) Time Remaining
Model 804 Manual
Page 6
804-9800 Rev G
Figure 5 Sample Screen
Channel 1 (0.3) or Favorite 1 (see Section 4.2.1) are displayed on Sample Screen Line 1. Rotate the Select dial to display channels 2-4 and battery status on line 2 (Figure 6).
0.3u 2,889 CF BATTERY = 100% Figure 6 Battery Status
4.2.1. Favorites Use Favorites in the Settings Menu to select one or two favorite display sizes. This eliminates the need to scroll the display when monitoring two non-adjacent sizes. You can view or change Favorites in the Settings menu (Section 5).
4.2.2. Warnings / Errors The 804 has internal diagnostics to monitor critical functions such as low battery, system noise and an optical engine failure. Warnings / errors are displayed on Sample Screen Line 2. When this occurs, simply rotate the Select dial to view any size on the top line.
A low battery warning occurs when there is approximately 15 minutes of sampling remaining before the unit stops sampling. A low battery condition is shown in Figure 7 below.
0.5u 6,735 CF Low Battery! Figure 7 Low Battery Excessive system noise can result in false counts and reduced accuracy. The 804 automatically monitors system noise and displays a warning when the noise level is high. The primary cause of this condition is contamination in the optical engine. Figure 7 shows the Sample screen with a System Noise warning.
0.5u 6,735 CF System Noise! Figure 8 System Noise
A sensor error is reported when the 804 detects a failure in the optical sensor. Figure 9 shows a sensor error.
0.5u 6,735 CF Sensor Error! Figure 9 Sensor Error
4.3. Sampling The following sub-sections cover sample related functions.
Model 804 Manual
Page 7
804-9800 Rev G
4.3.1. Starting/Stopping Press the START/STOP key to start or stop a sample from the Sample Screen. Depending on the sample mode, the unit will either run a single sample or continuous samples. Sample modes are discussed in Section 4.3.2.
4.3.2. Sample Mode The sample mode controls single or continuous sampling. The Manual setting configures the unit for a single sample. The Continuous setting configures the unit for nonstop sampling.
4.3.3. Count Units The 804 supports total counts (TC), particles per cubic foot (CF) and particles per liter (/L). Concentration values (CF, /L) are time dependent. These values may fluctuate early in the sample; however, after several seconds the measurement will stabilize. Longer samples (e.g. 60 seconds) will improve concentration measurement accuracy.
4.3.4. Sample Time Sample time determines the sample duration. Sample time is user settable from 3 to 60 seconds and is discussed in Sample Timing below.
4.3.5. Hold Time The hold time is used when Samples is set for more than one sample. The hold time represents the time from the completion of the last sample to the start of the next sample. The hold time is user settable from 0 9999 seconds.
4.3.6. Sample Timing The following figures depict the sample timing sequence for both manual and continuous sampling. Figure 10 shows the timing for manual sample mode. Figure 11 shows the timing for continuous sample mode. The Start section includes a 3 second purge time.
Start
Sample Time
Stop
Figure 10 Manual Sample Mode
Start
Sample Time
Sample Time
// Stop
Figure 11 Continuous Sample Mode
5. Settings Menu Use the Settings Menu to view or change configuration options.
Model 804 Manual
Page 8
804-9800 Rev G
5.1. View Settings Press the Select dial to navigate to the Settings Menu. Rotate the Select dial to scroll through the settings in the following table. To return to the Sample screen, press Start/Stop or wait 7 seconds.
The Settings menu contains the following items.
Function LOCATION
SIZES
FAVORITES
MODE
COUNT UNITS HISTORY SAMPLE TIME HOLD TIME TIME
DATE
FREE MEMORY
PASSWORD ABOUT
Description
Assign a unique number to a location or area. Range = 1 – 999
The 804 has four (4) programmable count channels. The operator can assign one of seven preset sizes to each count channel. Standard sizes: 0.3, 0.5, 0.7, 1.0, 2.5, 5.0, 10.
This feature eliminates the need to scroll the display when monitoring two non-adjacent sizes. See Section 4.2.1.
Manual or Continuous. The Manual setting configures the unit for a single sample. The Continuous setting configures the unit for nonstop sampling.
Total Count (TC), Particles / cubic foot (CF), particles / L (/L). See Section 4.3.3.
Display previous samples. See Section 5.1.1
See Section 4.3.4. Range = 3 – 60 seconds
See Section 4.3.5. Range 0 9999 seconds Display / enter time. Time format is HH:MM:SS (HH = Hours, MM = Minutes, SS = Seconds).
Display / enter date. Date format is DD/MMM/YYY (DD = Day, MMM = Month, YYYY = Year)
Display the percentage of memory space which is available for data storage. When Free Memory = 0%, the oldest data will be overwritten with new data.
Enter a four (4) digit numeric number to prevent unauthorized changes to the user settings.
Display model number and firmware version
5.1.1. View Sample History
Press the Select dial to navigate to the Settings Menu. Rotate the Select dial to the History selection. Follow the steps below to view sample history. To return to the Settings Menu, press Start/Stop or wait 7 seconds.
Press to View HISTORY
Press Select to view history.
Model 804 Manual
Page 9
804-9800 Rev G
30/MAR/2011
L001
10:30:45
#2500
0.3u 2,889
CF
0.5u
997
60
5.0u
15
60
10u
5
60
Location 001
DATE
30/MAR/2011
TIME
10:30:45
Low Battery!
804 will display the last record (Date, Time, Location, and Record Number). Rotate dial to scroll through records. Press to view record.
Rotate dial to scroll through record data (counts, date, time, alarms). Press Start/Stop to return to previous screen.
5.2. Edit Settings
Press the Select dial to navigate to the Settings Menu. Rotate the Select dial to scroll to the desired setting then press the Select dial to edit the Setting. A blinking cursor will indicate edit mode. To cancel edit mode and return to the Settings Menu, press Start/Stop.
Edit mode is disabled when the 804 is sampling (see below).
Sampling… Press Stop Key
Screen displayed for 3 seconds then return to Settings Menu
5.2.1. Password Feature
The following screen is displayed if you attempt to edit a setting when the password feature is enabled. The unit will remain unlocked for a period of 5 minutes after a successful password unlock code is entered.
Press to Enter
UNLOCK
####
Rotate and Press
UNLOCK
0###
Rotate and Press
UNLOCK
0001
Incorrect
Password!
Press Select to enter Edit mode. Return to Sample screen if no Select key in 3 seconds Blinking cursor indicates Edit mode. Rotate dial to scroll value. Press dial to select next value. Repeat action until last digit.
Rotate dial to scroll value. Press dial to exit Edit Mode.
Screen displayed for 3 seconds if the password is incorrect.
5.2.2. Edit Location Number
Press to Change
LOCATION
001
View screen. Press Select to enter Edit mode.
Model 804 Manual
Page 10
804-9800 Rev G
Rotate and Press
LOCATION
001
Rotate and Press
LOCATION
001
Blinking cursor indicates Edit mode. Rotate dial to scroll value. Press dial to select next value. Repeat action until last digit.
Rotate dial to scroll value. Press dial to exit Edit Mode and return to view screen.
5.2.3. Edit Sizes Press to View CHANNEL SIZES Press to Change SIZE 1 of 4 0.3 Rotate and Press SIZE 1 of 4 0.5
Press Select to view Sizes.
Sizes view screen. Rotate dial to view channel sizes. Press dial to change setting.
Blinking cursor indicates Edit mode. Rotate dial to scroll values. Press dial to exit Edit mode and return to view screen.
5.2.4. Edit Favorites Press to View FAVORITES Press to Change FAVORITE 1 0.3 Rotate and Press FAVORITE 1 0.3
Press Select to view Favorites.
Favorites view screen. Rotate dial to view Favorite 1 or Favorite 2. Press dial to change setting. Blinking cursor indicates Edit mode. Rotate dial to scroll value. Press dial to exit Edit mode. Return to view screen.
5.2.5. Edit Sample Mode
Press to Change
MODE
View screen. Press Select to enter edit mode.
CONTINUOUS
Rotate and
Press MODE CONTINUOUS
Blinking cursor indicates Edit mode. Rotate dial to toggle value. Press dial to exit Edit mode and return to view screen.
5.2.6. Edit Count Units
Press to Change
COUNT UNITS
View screen. Press Select to enter edit mode.
CF
Rotate and Press COUNT UNITS CF
Blinking cursor indicates Edit mode. Rotate dial to toggle value. Press dial to exit Edit mode and return to view screen.
5.2.7. Edit Sample Time
Press to Change
SAMPLE TIME
View screen. Press Select to enter Edit mode.
60
Rotate and
Blinking cursor indicates Edit mode. Rotate dial to scroll value.
Model 804 Manual
Page 11
804-9800 Rev G
Press SAMPLE TIME 60
Rotate and Press SAMPLE TIME 10
Press dial to select next value.
Rotate dial to scroll value. Press dial to exit Edit Mode and return to view screen.
5.2.8. Edit Hold Time Press to change View screen. Press Select to enter Edit mode. HOLD TIME 0000
Press to change Blinking cursor indicates Edit mode. Rotate dial to scroll value. HOLD TIME 0000 Press dial to select next value. Repeat action until last digit.
5.2.9. Edit Time Press to Change TIME 10:30:45
Rotate and Press TIME 10:30:45
Rotate and Press TIME 10:30:45
View screen. Time is real time. Press Select to enter edit mode.
Blinking cursor indicates Edit mode. Rotate dial to scroll values. Press dial to select next value. Repeat action until last digit.
Last digit. Rotate dial to scroll values. Press dial to exit Edit mode and return to view screen.
5.2.10.Edit Date Press to Change DATE 30/MAR/2011
Rotate and Press DATE 30/MAR/2011
Rotate and Press DATE 30/MAR/2011
View screen. Date is real time. Press Select to enter edit mode.
Blinking cursor indicates Edit mode. Rotate dial to scroll values. Press dial to select next value. Repeat action until last digit.
Rotate dial to scroll values. Press dial to exit Edit mode and return to view screen.
Model 804 Manual
Page 12
804-9800 Rev G
5.2.11. Clear Memory
Press to Change FREE MEMORY 80%
View screen. Available memory. Press Select to enter edit mode.
Press and Hold to Clear Memory
Hold Select dial for 3 seconds to clear memory and return to view screen. Return to view screen if no action for 3 seconds or key hold time is less than 3 seconds.
5.2.12. Edit Password
Press to Change PASSWORD NONE
View screen. #### = Hidden password. Press Select to enter Edit mode. Enter 0000 to disable password (0000 = NONE).
Rotate and Press PASSWORD 0000
Blinking cursor indicates Edit mode. Rotate dial to scroll value. Press dial to select next value. Repeat action until last digit.
Rotate and Press PASSWORD 0001
Rotate dial to scroll value. Press dial to exit Edit Mode and return to view screen.
6. Serial Communications Serial communications, firmware field upgrades and real time output are provided via the USB port located on the side of the unit.
6.1. Connection
ATTENTION: The included USB driver CD must be installed before connecting the 804 USB port to your computer. If the supplied drivers are not installed first, Windows may install generic drivers that are not compatible with this product.
To install USB drivers: Insert the USB Drivers CD. The install program should run automatically and display the screen below. If an AutoPlay pop-up window appears, select “Run AutoRun.exe”. Finally, select “USB Drivers” to start the install process.
Note: For proper communication, set the virtual COM port baud rate to 38400
Model 804 Manual
Page 13
804-9800 Rev G
6.2. Commands
The 804 provides serial commands for accessing stored data and settings. The protocol is compatible with terminal programs such as Windows HyperTerminal.
The unit returns a prompt (`*’) when it receives a carriage return to indicate a good connection. The following table lists the available commands and descriptions.
SERIAL COMMANDS Protocol Summary:
· 38,400 Baud, 8 Data bits, No Parity, 1 Stop Bit · Commands (CMD) are UPPER or lower case · Commands are terminated with a carriage return <CR> · To view setting = CMD <CR> · To change setting = CMD <SPACE> <Value> <CR>
CMD ?,H 1 2 3 4 D T C S E SH ST ID
Type Help Settings All data New data Last data Date Time Clear data Start End Hold Time Sample time Location
CS w x y z
Channel Sizes
SM
Sample mode
CU
Count units
OP
Op Status
RV
Revision
DT
Date Time
DESCRIPTION View the help menu View the settings Returns all available records. Returns all records since last `2′ or `3′ command. Returns the last record or last n records (n = <Value>) Change date. Date is format is MM/DD/YY Change time. Time format is HH:MM:SS Displays a prompt for clearing the stored unit data. Start a sample Ends a sample (abort the sample, no data record) Get/Set the hold time. Range 0 9999 seconds. View / change the sample time. Range 3-60 seconds. View / change the location number. Range 1-999. View / change channel sizes where w=Size1, x=Size2, y=Size3 and z=Size4. Values (w x y z) are 1=0.3, 2=0.5, 3=0.7, 4=1.0, 5=2.5, 6=5.0, 7=10 View / change sample mode. (0=Manual, 1= Continuous) View / change count units. Values are 0=CF, 1=/L, 2=TC Replies OP x, where x is “S” Stopped or “R” Running View Software Revision View / change date and time. Format = DD-MM-YY HH:MM:SS
Model 804 Manual
Page 14
804-9800 Rev G
6.3. Real Time Output The Model 804 outputs real time data at the end of each sample. The output format is a comma separated values (CSV). The following sections show the format.
6.4. Comma Separated Value (CSV) A CSV header is included for multiple record transfers like Display All Data (2) or Display New Data (3).
CSV Header: Time, Location, Period, Size1, Count1, Size2, Count2, Size3, Count3, Size4, Count4, Units, Status
CSV Example Record: 31/AUG/2010 14:12:21, 001,060,0.3,12345,0.5,12345,5.0,12345,10,12345,CF,000<CR><LF>
Note: Status bits: 000 = Normal, 016 = Low Battery, 032 = Sensor Error, 048 = Low battery and Sensor Error.
7. Maintenance WARNING: There are no user serviceable components inside this instrument. The covers on this instrument should not be removed or opened for servicing, calibration or any other purpose except by a factory-authorized person. To do so may result in exposure to invisible laser radiation that can cause eye injury.
7.1. Charging the Battery
Caution: The provided battery charger is designed to work safely with this device. Do not attempt to connect any other charger or adapter to this device. Doing so may result in equipment damage.
To charge the battery, connect the battery charger module AC power cord to an AC power outlet and the battery charger DC plug to the socket on the side of the 804. The universal battery charger will work with power line voltages of 100 to 240 volts, at 50/60 Hz. The battery charger LED indicator will be Red when charging and Green when fully charged. A discharged battery pack will take approximately 2.5 hours to fully charge.
There is no need to disconnect the charger between charging cycles because the charger enters a maintenance mode (trickle charge) when the battery is fully charged.
Model 804 Manual
Page 15
804-9800 Rev G
7.2. Service Schedule
Although there are no customer serviceable components, there are service items which ensure the proper operation of the instrument. Table 1 shows the recommended service schedule for the 804.
Item To Service Flow rate test Zero test Inspect pump Test battery pack Calibrate Sensor
Frequency
Done By
Monthly
Customer or Factory Service
Optional
Customer or Factory Service
Yearly
Factory service only
Yearly
Factory service only
Yearly
Factory service only
Table 1 Service Schedule
7.2.1. Flow Rate Test
The sample flow rate is factory set to 0.1cfm (2.83 lpm). Continued use can cause minor changes in flow which can reduce measurement accuracy. A flow calibration kit is available separately that includes everything needed to test and adjust the flow rate.
To test the flow rate: remove the inlet screen holder. Attach the inlet adapter connected to the flow meter (MOI# 80530) to the instrument inlet. Start a sample, and note the flow meter reading. The flow rate should be 0.10 CFM (2.83 LPM) 5%.
If the flow is not within this tolerance, it can be adjusted by a trim pot located in an access hole in the side of the unit. Turn the adjustment pot clockwise to increase the flow and counter-clockwise to decrease the flow.
7.2.1. Zero Count Test
The 804 automatically monitors system noise and displays a System Noise warning when the noise level is high (see Section 4.2.2). This diagnostic reduces the necessity for an inlet filter zero count test. However, a zero count kit can be purchased separately if desired.
7.2.2. Annual Calibration
The 804 should be sent back to Met One Instruments yearly for calibration and inspection. Particle counter calibration requires specialized equipment and training. The Met One Instruments calibration facility uses industry accepted methods such as ISO and JIS.
In addition to calibration, the annual calibration includes the following preventative maintenance items to reduce unexpected failures:
· Inspect filter · Inspect / clean optical sensor · Inspect pump and tubing · Cycle and test the battery
Model 804 Manual
Page 16
804-9800 Rev G
7.3. Flash Upgrade Firmware can be field upgraded via the USB port. Binary files and the flash program must be provided by Met One Instruments.
8. Troubleshooting WARNING: There are no user serviceable components inside this instrument. The covers on this instrument should not be removed or opened for servicing, calibration or any other purpose except by a factory-authorized person. To do so may result in exposure to invisible laser radiation that can eye injury.
The following table covers some common failure symptoms, causes and solutions.
Symptom Low battery message
System noise message
Sensor error message Does not turn on, no display Display turns on but pump does not No counts
Low counts
High counts Battery pack does not hold a charge
Possible Cause Low battery
Contamination
Sensor failure 1. Dead battery 2. Defective Battery 1. Low Battery 2. Defective pump 1. Pump stopped 2. Laser diode bad 1. Low flow rate 2. Inlet screen clogged 1. High flow rate 2. Calibration 1. Defective battery pack 2. Defective charger module
Correction
Charge battery 2.5 hrs 1. Check inlet screen 2. Blow clean air into nozzle
(low pressure, do not connect via tubing) 3. Send to service center Send to service center 1. Charge battery 2.5 hrs 2. Send to service center 1. Charge battery 2.5 hrs 2. Send to service center 1. Send to service center 2. Send to service center 1. Check flow rate 2. Check inlet screen 1. Check flow rate 2. Send to service center 1. Send to service center 2. Replace charger
Model 804 Manual
Page 17
804-9800 Rev G
9. Specifications
Features: Size Range: Count Channels: Size Selections: Accuracy: Concentration Limit: Flow Rate: Sampling Mode: Sampling Time: Data Storage: Display: Keyboard: Status Indicators: Calibration
Measurement: Method: Light Source:
Electrical: AC Adapter/Charger: Battery Type: Battery Operating Time: Battery Recharge Time: Communication:
Physical: Height: Width: Thickness: Weight
Environmental: Operating Temperature: Storage Temperature:
0.3 to 10.0 microns 4 channels preset to 0.3, 0.5, 5.0 and 10.0 m 0.3, 0.5, 0.7, 1.0, 2.5, 5.0 and 10.0 m ± 10% to traceable standard 3,000,000 particles/ft3 0.1 CFM (2.83 L/min) Single or Continuous 3 60 seconds 2500 records 2 line by 16-character LCD 2 button with rotary dial Low Battery NIST, JIS
Light scatter Laser Diode, 35 mW, 780 nm
AC to DC module, 100 240 VAC to 8.4 VDC Li-ion rechargeable Battery 8 hours continuous use 2.5 hours typical USB Mini B Type
6.25″ (15.9 cm) 3.63″ (9.22 cm) 2.00″ (5.08 cm) 1.74 lbs 28 ounces (0.79 kg)
0º C to +50º C -20º C to +60º C
Model 804 Manual
Page 18
804-9800 Rev G
Documents / Resources
 |
Met One Instruments 804 Handheld Particle Counter [pdf] Instruction Manual 804 Handheld Particle Counter, 804, Handheld Particle Counter, Particle Counter |