WatchGas PDM PRO CO2 User manual

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D e t e c t i on
PDM
PRO CO2
Sustainable
Gas Detector
USER MANUAL

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Contents
Contents 2
Description 3
Warning 3
Caution 3
1 Product Overview 4
2 Activation and deactivation 5
2.1 Bump Test 5
3 Mode 6
3.1 Measuring Mode 6
3.2 Display Mode 6
3.3 Menu Overview 7
4 Setting Mode 8
4.1.1 Alarm Activation 9
4.1.2 Adjust alarm setpoints 9
4.1.3 Data log 9
4.2 Calibration 10
4.3 Clear Max 11
4.4 Clear STEL and TWA 11
4.5 Adjust TWA 12
4.6 Factory Reset 12
4.7 Self Test 12
4.8 Bump Test 12
5 Conguration software 13
5.1 Software Overview 14
5.1.1 Read 14
5.1.2 Write 14
5.1.3 Calibration 14
5.1.4 Log 14
5.1.5 Upgrade (Firmware) 14
5.2 Window Menu 14
5.2.1 Menu File 14
5.2.2 Menu Tools 14
5.2.3 Menu Device 15
5.2.3.1 Menu Device 15
6. Maintanance 15
7 Battery Charging 15
8 Specications 16
9 Accessories 17
10 Limited Warranty 18

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Description
The PDM PRO CO₂ is a portable single gas detector designed to detect the presence of carbon dioxide gas in ambient
environment. When activated, PDM PRO CO₂ continuously monitors ambient air for the presence of carbon dioxide gas and
alerts the user to potentially unsafe exposure with LED, vibrating, and audible alarms in the event that gas concentration
exceeds alarm setpoints. The settings value can be adjusted manually or by connecting to a PC software.
Warning
• Any unauthorized attempt to repair or modify the product, or any other cause of damage beyond the range
of the intended use, including damage by re, lightening, or other hazard, voids liability of the manufactu-
rer.
• Activate this product only if sensor, visual, detection, and audible cover are clear from contaminants such as
dirt and debris that could block the area where gas is to be detected.
• Do not clean and rub the LCD screen of the products with a dry cloth or hands in hazardous environment to
prevent the static electricity.
• Perform cleaning and maintenance of the products in fresh air that is free of hazardous gases
• Test the response of a sensor regularly by the gas concentration exceeding alarm set points.
• Test LED, audio and vibration manually.
• If the temperature changes sharply during use of the device (e.g., indoors vs outdoors), the value of the
measured gas concentration can suddenly change. Please use the detector after the gas concentration
value has stabilized.
• Severe vibration or shock to the device may cause a sudden reading change. Please use detector after the
value of gas concentration has stabilized. Excessive shock to the detector can cause the device and/or sen-
sor to malfunction.
• Alarm value should be set based on local regulations. Therefore, alarm values should be changed only un-
der the responsibility and approval of the administration of the work site where the instrument is used.
• Use IR communications in the safety zone which is free of hazardous gases.
• Replace the battery and sensor in a clean environment, which is free of hazardous gas.
• If the CO2concentration reaches 0 ppm, the calibration should be performed.
Caution
• Before operating this device, please read the manual carefully.
• This device is not an analyzer, but a gas detector.
• If calibration and self-test fails continuously, please do not use the device and contact a WatchGas distribu-
tor.
• Clean detectors with a soft cloth and do not use chemical substances for cleaning.

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1. Product Overview
DETECTOR COMPONENTS
1. LCD display
2. Buzzer
3. Gas sensor
4. Power button
5. Enter button
6. Alarm LEDs
1
3
24
5
6
6
DISPLAY SYMBOLS
Calibration / Setting Success
Measurement Unit
Battery indicator
Low Alarm
High Alarm
Max value
Test succes
Over Limit
Calibration / Setting Failure
Standard gas calibration
Alarm condition
Short Term Eposure Limit
Time Weighted Average
Test Fail
End of test

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2. Activation & Deactivation
1. Move to a fresh air environment, which is free of hazardous gas
2. Press and hold down the power button for approximately 2 seconds until the gas type (CO2) is displayed.
3. Upon activation, gas type(CO2), rmware version, and display appears, and the detector performs the self
diagnostic test for 10 seconds.
4. After self test is successful, the detector countdown is displayed for 10 seconds.
5. Allow the detector to stabilize for 90 seconds until warm up message(---) is no longer displayed.
6. The detector displays current CO2concentration.
If the stabilization is failed, Error mark is displayed and measuring mode will not be entered. In this case, contact WatchGas at
[phone] or [e-mail]
Err-1 Initial setting error
Err-2 Sensor error
Err-3 Memory error
Err-4 Low battery
Fault codes
2.1 BUMP TEST
1. Before daily use, users are required to perform bump test to see a sensor responds to CO2gas.
2. To perform the bump test, follow the below steps.
• Obtain a gas cylinder containing CO2gas over low and high alarm.
• Press and hold the Enter button and power button for three seconds in the measurement mode. Press
the Enter button until“TEST” is displayed and press the power button 2 sec to enter the mode.
• Press the Enter button until “BTS is displayed and press the power button to activate it.
• After pressing the power button, apply a CO2gas over low alarm after the 30 seconds count down is
displayed.
• Once the test is passed,“SUC”(V) icon appears on the display. If test is failed,“FA”*(X) mark appears on
the display.
• The device will automatically return to measuring mode.

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3. Mode
3.1 MEASURING MODE
When activated, gas concentration is displayed in measuring mode
3.2 DISPLAY MODE
In the measuring mode, by pressing Enter button, the following ICONs will appear in order. Max value -> STEL
value -> TWA value -> Low alarm setpoint -> High alarm setpoint -> STEL alarm setpoint -> TWA alarm setpoint
->Firmware version ->Calibration concentration.
• To move to the next menu, press the Enter button.
• At the last step, press Enter button or do not push any button for 10 seconds, the device will return to the
Measuring Mode.
Measured STEL valueMax Value
Low Alarm Value
Setting
Measured TWA value
STEL Alarm Value
Setting
TWA Alarm Value
Setting
Calibration
Concentration
Firmware version
High Alarm Value
Setting
1 2
4
6
8
9
7
5
3

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3.3. MENU OVERVIEW
MENU
Note:
1. Manual calibration can be disabled in the WatchGas software
2. If no button is pressed for 10 seconds, the device will return to measuring mode.

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4. Setting Mode
In the setting mode, users can adjust alarm setpoints, perform calibration, and reset previous values.
1. To enter the setting mode, press and hold the Enter button & power button simultaneously for three
seconds. The following menu ALr -> CAL -> Clr MAX -> Clr STEL, TWA -> Unit -> Init ->Test is displayed.
2. To move the next menu, press the Enter button.
3. To enter the menu, press and hold down the power button.
Caution
- Ensure that the high alarm setpoint must be greater than low alarm setpoint.
Before the alarm adjustment, check with your safety manager or dealer authorized by WatchGas.
Alarm setpoints may vary by a country or company policy. Unless specied in your company’s safety
instruction, use the preset alarm setpoints. Always comply with the local safety regulations.
- Beware Standard Factory alarm set points may vary depending on countries, states, and companies.
- Before changing alarm setpoints, ensure the alarm set points follow your local guidelines.
- For safety, users are not allowed to set the Low alarm value to zero. When attempting to set Low
alarm to zero, the value changes to 400ppm!
SETTING MODE SYMBOLS
Setting Submenu LCD Action
1 ALr
Low Alarm
High Alarm Low alarm concentration setting
High alarm concentration setting
2 CAL
Fresh
N2
CO2
Fresh air Calibration
N2Calibration
CO2Calibration
3 CLr Delete maximum alarm
Concentration
4CLr STEL,
TWA
Delete maximum STEL and TWA
concentration
5 Unit
%vol / ppm
Concentration unit conversion
6 Init Reset
7 Test
Self
Bts Self test
Bump test

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4.1.1 ALARM ACTIVATION
When the gas concentration exceeds alarm set points, or and will be displayed and the device will
vibrate, ash (LED), and give an acoustic signal. To remove alarms, move to a clean air location. When a gas
concentration is decreased below the alarm setpoints, alarm will stop.
Low Alarm
Audible Alarm: 3 beeps per seconds
LED: 3 flashes per seconds
Vibration: 1 vibration per second
High Alarm
Audible Alarm: 4 beeps per seconds
LED: 4 flashes per seconds
Vibration: 1 vibration per second
TWA and STEL Alarm
Audible Alarm: 4 beeps per seconds
LED: 4 flashes per seconds
Vibration: 1 vibration per second
4.1.2. ADJUST ALARM SETPOINTS
Adjust alarm setpoints
To enter the setting mode, press and hold the Enter button and power button
simultaneously for two seconds.
In the alarm setting icon, press and hold down the power button for 2 seconds
Press the Enter button to change the alarm setpoints.
Press the power button to save the value and move to the next step
4.1.3. DATA LOG AND EVENTLOG
1. The detector stores the last 30 event logs. If the data is lled, the new log event overwrites the oldest log
events.
2. The datalog stores gas reading at every 1minute interval, and it stores about 64,000 data logs.
3. Data logs consisting of event log, bump, calibration are stored at 1minute interval.
4. To transfer event logs and data log to a computer, use the WatchGas USB-Link software, refer to 5.1.4.

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4.2. CALIBRATION
Caution
- Initial calibration is performed on all devices prior to shipment.
- The detector has the zero calibration(N2) and span calibration(CO2)
- Depending on use, a frequency of calibration should be adjusted. For instance, if you use the device
daily, weekly or monthly calibration may need to be performed, while the device is used a few times
a year, monthly or quarterly calibration may be required. Before calibration,
check with your safety managers to ensure calibration accessibility.
- Before calibration, move to a fresh air, which is free of toxic and combustible gases.
- If calibration fails, perform re-calibration again. If the repeated calibration continues to fail, contact
authorized safety managers or distributors.
Calibration Gas
Calibration Type Zero Span
Gas Type N2CO2
Concentration (recommended) 99.99%vol 20,000ppm, 2%vol
Note: Span concentration can be changed.
1 - Zero (N2) Calibration
1. In the “CAL” mode, press the Enter button to move to the“ZERO(N2)” calibration.
2. Plug the calibration cap to the detector and connect the calibration cylinder with
N2(99.9%vol)
3. Press the power button start zero calibration. Release the N2 gas from the
cylinder.
4. After 90 seconds, when N2calibration is successful, success message(V) appears.
But, If N2calibration is failed, FAIL message(X) appears.
5. Device will return to measuring mode automatically.
Note: Use the regulator with a ow rate of 0.2LPM(Liters per minute) of a gas cylinder.
Warning
Never preform a zero calibration in ambient air.

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4.3. CLEAR MAX
To delete the measured peak concentration in the detector, follow below steps.
1. Press the Enter button & power button simultaneously and the
Enter button until Clr(max) is displayed.
2. Press the power button to clear the peak value.
3. After the successful clearance, “SUC” (V) mark is displayed. If it fails,
FA (X) mark is displayed.
4. Press Power button to return to menu
4.4. CLEAR STEL AND TWA
To delete the measured STEL and TWA value in the detector, follow below steps
1. Press the Enter button until Clr(STEL & TWA) is displayed.
2. Press the power button to delete the TWA and STEL value
3. After the successful clearance, “SUC” (V) mark is displayed.
4. Press Power button to return to menu.
Caution
- Do not change the calibration concentration unless dealers or safety managers authorized by
WatchGas give permission to change to another calibration concentration.
- Use the regulator with a ow rate of 0.2LPM(Liters per minute) of a gas cylinder.
2 - Span Calibration
1. In the calibration mode, press the Enter button to move to span calibration.
2. Conrm span gas concentration. Press Power button to skip digits and conrm. Press Enter to adjust digit.
3. Plug the calibration cap to the detector and connect the calibration cylinder with CO2(20,000ppm)
4. Press the power button to start calibration. Release CO2gas from the cylinder.
5. After 90 seconds, when the calibration is successful, success message(V) appears. If N2calibration fails, fail
message( X) appears.
6. The device will automatically return to measuring mode.
Note: Calibration can be aborted by pressing the Power Button.

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4.5 ADJUST UNIT
To change the unit(PPM or Vol) in the detector, follow below steps:
1. In the menu, press the Enter button until Unit is displayed and power button to enter the mode.
2. Press the Enter button to select a unit (ppm or %vol) and power button to save it.
3. After the successful activation, SUC(V) mark is displayed. If it fails, FA(X) mark is displayed.
4. Press the Power button to return to the menu.
4.6 FACTORY RESET
Warning
Device settings will be overwritten when factory reset is preformed.
To restore the factory setting, please follow below steps.
1. In the menu, press the Enter button until “Initiate” is displayed.
2. Press the power button to apply it.
3. After the successful activation, SUC(V) mark is displayed. If it fails,
FA(X) mark is displayed.
4. Press the Power button to return to the menu.
4.7 SELF TEST
To perform the self diagnostic test, follow below steps.
1. Press the Enter button until Test is displayed
2. Press the power button for three seconds. In the “SELF” display, press the power button for three seconds to
activate the self test. While it’s activated, the detector will test LED, beeping, vibration, ash memory, and
sensor. After the successful test, V mark is displayed. If the test fails, FA with X mark is displayed.
3. If the self test fails, the Error message appears.
4. The device will automatically return to measuring mode.
4.8 BUMP TEST
Refer to 2.1

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5. Conguration software
To congure the PDM Pro CO2use the WatchGas USB Link program. The latest version is available at
www.watchgas.eu
5.1 SOFTWARE OVERVIEW
• Sensor Type – The current sensor type in the device (CO₂, cannot be changed)
• Serial Number – PDM PRO CO2serial number (cannot be changed)
• Firmware Version – Current rmware version of the unit (can change by upgrading)
• User ID/Message - Set User ID/Name
• Unit – Adjust to PPM or %vol
• Stealth – Disable/enable the alarm, buzzer, and LED (not recommended)
• Calibration Use – Disable/enable manual calibration
• Low Alarm & High Alarm – The 1st and 2nd alarm set points (Min/Max: 400ppm ~ 49,999ppm (0,04 - 5%vol)
• STEL Alarm & TWA Alarm – Short Term Exposure Limit and Time Weighted Average level of concentration of
CO₂ (Min/Max: 400ppm ~ 49,999ppm (0,04-5%vol)
• Gas Concentration – This allows a user to enter/amend correct concentration of the gas cylinder (Min/Max:
400ppm (0.04%vol) ~ 49,999ppm (5%vol)
• Calibration Interval (day) – The calibration reminder informs every xed day (can adjust 0 (n/a) ~ 365)
• Bump Interval (Days) – The Bump test reminder informs every xed day (can adjust 0 (n/a) ~ 365)
• Self Interval (Days) – The Self test reminder informs every xed day (can adjust 0 (n/a) ~ 365)
*Default is N/A
Note:
• When the software is opened, the elds are grayed out and before it can be used, the “OPEN” button must
be clicked.
• Without clicking the “Write” button, congured and customized settings will not be applied and neither be
saved.
• If the USB connection is successful, the “Success” icon appears. If the connection fails, reconnect the USB
cable or check the device manager to see the connection status.
D e t e c t i on

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5.1.1. READ
The “Read”button (upper-left side rst icon) allows a user to retrieve the stored data.
5.1.2 WRITE
The “Write” button (upper-left side second icon) has one of the most important role in this software interface.
Because every single and each congured or customized settings will be saved by clicking “Write” button. When a
user congures the instrument`s settings, “Write” button will be clicked and message will pop-up. Click “Yes”.
5.1.3 CALIBRATION
To perform the calibration using software, follow the below:
1. Connect the unit to the PC using instrument`s USB
2. Plug the calibration cap and connect with N2or CO2gas cylinder.
3. Open the software and click “Calibration” (middle-left side icon) and wizard will
come up
4. Choose the calibration gas type and click “Start”with releasing the gas from the
cylinder.
5. The zero(N2) and span(CO2) calibration takes 90 seconds.
5.1.4 LOG
All recent 30 events and 64.000 gas readings will be stored in the device and will
be automatically erases one by one from the earliest logs when new event occurs.
There are two types of event logs, “Event Log”and “Event + Data log” are available
to download. Choose the log and click “Download” button. The log les will be
downloaded and created by unit`s Serial number and will be in “.csv” format. However,
clicking “Erase”button will clear all the logs from the storage of device and cannot be
recovered.
5.1.5 UPGRADE FIRMWARE
1. To upgrade the latest rmware version of the PDM PRO CO₂, follow the below:
2. Click “Browse” button and navigate to the rmware location
3. Choose the rmware and click the “Open” button
4. Click “Write” to begin upgrading process
5. When upgrade is nished, power o the device and turn it on
6. The“F-UP” ->“boot” message will come up and upgrade is complete
Note:
Pressing “Cancel” button during the upgrading process will cancel and close the Firmware Upgrade Wizard
5.2 WINDOW MENU
5.2.1 MENU  FILE F
5.2.2 MENU  TOOLS T
• Load(L) Load the installed settings
• Save(S) Save the current settings
• Exit(X) Finish the work and end the program (close the tap)
• Calibration(C) Open the calibration window to start calibration process
• Log Read(R) Retrieve and save the log events
• Log Erase(E) C lean all the logs from the storage (erased logs cannot be recove-
red)
• FW Upgrade(U) Open the rmware upgrade window to start upgrading process

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• Self Test(S) Automatic self diagnose of the unit
• Test order: LED -> Beep -> Motor -> Flash -> Sensor -> End
• Factory Default(F) Reset original settings and specications
• Time Write(T) To set a time by user location (or sync to PC time)
• Power OFF(P) Turn o the device
• IAP Version Read(I)
5.2.3 MENU  DEVICE D
5.2.3.1 MENU  DEVICE
• Now Time - When you click the “Now Time”button, it automatically sets
the current time on the PC of the operator. The initial time is preset in the
factory in South Korea, so to apply the time in your location, press “Now
time”and press “time write”.
• Time Write by clicking “Time Write” button, selected and customized
time will set.
Warning
-Before dissembling the detector, power it o.
-Maintanance can only be preformed by authorized service centers.
-It is absolutely prohibited to replace battery at potential explosion or dangerous regions.
-Unauthorized opening the detector and/or replacement of components will void intrinsic safety.
6. Maintenance
For maintenance please contact WatchGas or an authorized WatchGas dealer.
and refer to the service manual.
7. Battery Charging
• To charge the battery,
• Connect the USB-C type cable with the charging port at bottom of the
device.
• Connect the USB port with a provided adaptor (5V, 1.2A)
• While charging, the backlight illuminates.
• After the full charging, the back light turns o with full battery symbol.
• In the low battery, the alarm is activated every three minutes
Note
The device can still charge by connecting to a PC and the purpose of connection
is not for charging but for linking the PC program.
Warning
Only charge battery in non-hazardous environments , free of hazardous gas.
Only use the original USB-charger.

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8. Specication
Size 54(W) x 99,5(H) x 38(D) mm
Weight 135 grams
Sensor technology Non-dispersive Infrared (NDIR)
Temperature -20ºC ~ +50ºC
Humidity 5% ~ 95% RH (non-condensing)
Alarm types High Alarm, Low Alarm, TWA Alarm, STEL Alarm,
Over range Alarm, Battery low warning, Calibration due warning
Alarm signal
Acoustic: 90dB @ 10cm
Visual: Red ashing LED’s
Vibration: Vibration alarm
Display LCD Display
Calibration Manual 2-point calibration
Datalog Stores up to 64000 datapoints
Event log 30 Most recent events (overwriting)
Operating time 7 days
Battery charging time 100 minutes
Measuring range 0-5%vol CO2 or 0-50000ppm CO2
Sensor resolution 0.1 vol% or 100 ppm
Housing Rubber enclosed polycarbonate
IP-Rating IP67
Response Time T90 ≤ 60sec
EMI/RFI EMC directive (2014/30/EU)
Sensor Life 5 years (expected)
Safety certications ATEX: Non-ATEX
CE: 2014/30/EU
RoHS 2
Warranty 24 Months factory warranty
Included accessories Calibration Cap and USB-C charger (Usable worldwide)
Sensor Detectable Gas Ranges Resolution Article Number
WatchGas PDM Pro
CO2 NDIR sensor
0-5 %vol CO2
0-50000 ppm CO2
0.01 %vol
100 ppm 7192008

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Description Article Number
WatchGas Last-O-More Gas Sampling Hose 5x8mm 7SOL-411-0018-039
WatchGas Sampling Pump 7177202
WatchGas Fixed Flow Regulator 0.5l/min CAL-A0195339
Calibration cap for WatchGas PDM 7177200
Also check out the rest
of ourPDM Family
range on the WatchGas
website!
Calibration Gas for CO2
(Span) and N2( Fresh-Air)
Last-O-More Gas
Sampling Hose
WatchGas Sampling
Pump
Fixed Flow Regulator
0.5L per minute
Stainless Steel or 1L per
minute Stainless Steel
regulators
9. Accesories

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10. Limited Warranty
WATCHGAS warrants this product to be free of defects in workmanship and materials-under normal
use and service-for two years from the date of purchase from the manufacturer or from the product’s
authorized reseller.
The manufacturer is not liable (under this warranty) if its testing and examination disclose that the
alleged defect in the product does not exist or was caused by the purchaser’s (or any third party’s)
misuse, neglect, or improper installation, testing, or calibrations. Any unauthorized attempt to repair
or modify the product, or any other cause of damage beyond the range of the intended use, including
damage by re, lightening, water damage or other hazard, voids liability of the manufacturer.
In the event that a product should fail to perform up to manufacturer specications during the appli-
cable warranty period, please contact the product’s authorized reseller or WATCHGAS service center at
[phone] for repair/return information.
WatchGas
Klaverbaan 121
2908 KD Capelle aan den IJssel
The Netherlands
[phone]
[e-mail] - www.watchgas.eu
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