WatchGas PDM+ User manual

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PDM+ Single Sustainable Gas Detector
User Manual
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Contents
Contents 2
Description 3
Warning 3
Caution 4
1 Product Overview 5
2 Activation And Deactivation 6
3 Mode 7
3.1 Detection Mode 7
3.2 Display Mode 7
3.3 Alarms / Battery / Test Failure display 7
3.4 Default Alarm Set Points 7
3.5 Default Calibration Gas Concentrations 7
4 Event Log 8
5 Calibration 8
5.1. Fresh Air Calibration 8
5.2. Standard Gas Calibration 9
5.3. Remaining Calibration Day 9
5.4. Return to the Detection Mode 10
6 Self Test & Bump Test 10
6.1. Self Test 10
6.2. Bump Test 11
7 Sensor & Battery Replacement 11
7.1. Sensor Replacement 11
7.2. Battery Replacement 12
8 Specications 12
8.1. General Specications 12
8.2. Sensor Specications 12
9 Certicates 13
10 Limited Warranty 14

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Description
PDM+ is a single sustainable gas detector designed to detect oxygen deciency and
presence of toxic gas in the ambient environment. The PDM+ is sustainable, hence its battery and
sensor can be replaced. When turned on, PDM+ continuously monitors ambient air for the presence
of a specic gas and alerts the user to potentially unsafe exposure with LED, vibrating, and audible
alarms in the event that gas concentration exceeds alarm set points. The alarm set point, calibration
range, and display conguration can be changed via WatchGas IR Link (Optional). After use, the
instrument can be turned o.
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 manufacturer
• 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 point
• Test LED, audio and vibration manually
• Gas concentration measurements by the sensor can vary based on the environment (pressure and
humidity) Therefore, calibration of SGT P should be performed in the same (or similar) environment
of the device’s actual use
• 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 SGT P after the gas
concentration value has stabilized
• Severe vibration or shock to the device may cause a sudden reading change Please use SGT P after
the value of gas concentration has stabilized Excessive shock to SGT P can cause the device and/or
sensor to malfunction
• All alarm value is set based on the alarm standard that is required by international standard.
Therefore, alarm values should be changed only under 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 clean environment, which is free of hazardous gas

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Caution
• Before operating this device, please read the manual carefully.
• This device is not a measurement device, but a gas detector.
• If calibration and self-test fails continuously, please do not use the device.
• For the O2detector, perform calibration every 30 days in the fresh air environment.
• Before use, please check the activation date, and if the activation date is past, please do not use
the device.
• Clean detectors with a soft cloth and do not use chemvical substances for cleaning.
• To maintain 24 months life time, avoid the below activities except the necessary cases to check
events(Max/Min), lifetime/concentration, and alarm set points. Otherwise, the frequent use of the
button will deplete the battery lifetime less than 24 months.
1. Push the button frequently without valid reasons.
2. Frequent alarm operation or alarms are remained for a long time. *Normal Alarm Use: 1 time
and 2 minutes per day.

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User Manual Single Sustainable Gas Detector PDM+
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1. Product Overview
DETECTOR COMPONENTS
1. Gas sensor
2. Gas type sticker
3. LCD display
4. Button
5. Buzzer
6. Optical alarm LEDs
7. IR communication port
1
2
3
4
5
66
7
DISPLAY SYMBOLS
Alarm
Low Alarm
High Alarm
Stabilization Success
Stabilization Fail
Fresh Air Calibration
Standard Gas Calibration
TWA Time Weighted Average
STEL Short Term Exposion Limit
Remaining Months
Remaining Days
Remaining Time (Hours)
Max Peak Value
Min Peak Value
Unit of Measurement
Remaining battery life
T W A S T E L

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2. Activation & Deactivation
ACTIVATION AND DEACTIVATION
In a safe environment, when pressing and holding the botton ( ) for 3 seconds, gas type and
rmware
version (ex. v2.2) will be displayed. For 10 seconds countdown, the device will be stabilized. After
stabilization is completed, the device will move to Detection mode.
Caution
Although the PDM+ is calibrated before it leaves the factory, a proper calibration is
advisable before using it at the work site. The user should check whether the device is
properly detecting hazardous concentrations and make sure that the detecting section of
the device is not blocked with materials impairing the detection.
In the event that stabilization of the device fails, will appear on the display and gas measurement
mode will not be entered. In this case, perform calibration or contact authorized reseller for repair/
return information.
To deactivate the device, pleas press and hold the key( ) for countdown.
Note
Information about production dates?
Please contact WatchGas by calling [phone] or by sending us
an e-mail to: [e-mail]

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3. Mode
3.1 MEASUREMENT MODE
When activated, in measuring mode, gas concentration will appear on the
screen. Oxygen concentration is displayed in percent by volume (%vol)
and toxic concentration is displayed in parts per million (ppm).
3.2 DISPLAY MODE
In the Measuring Mode, by pressing key ( ) for one second, the following icons will appear in order:
(only for oxygen) -> -> STEL value -> TWA value-> Clr Max-> Clr TWA/STEL ->1st alarm
set point --> 2nd alarm set point -> STEL setpoint -> TWA Set point-> Firmware version -> Remaining
Calibration Day -> Calibration
If you press the key or do not push any button for a second, the PDM+ will return to Measuring Mode.
3.3. ALARM ACTIVATION & CONFIGURING ALARM SET POINTS
When a gas concentration exceeds alarm set points, or will be displayed and the device will
vibrate, ash its LEDs, and beep. To stop alarms, evacuate immediately to a clean air location.
When bump test or calibration failed, will be displayed and the PDM+ will beep intermittently.
To congurate the alarm setpoints, please follow the steps below.
• Press the button until the above alarm setpoint is displayed
• Press and hold the button for three seconds and the rst digit of alarm setpoint starts to blink
• To increase the value, press the button for one second
• To save the alarm setpoints, press the key for 3 seconds
* Ensure that the second alarm setpoint must be greater than rst alarm setpoint.
* Ensure Standard Factory alarm setpoints vary depending on countries, states, and companies.
3.4. DEFAULT ALARM SET POINTS
Gas O2CO H2S H2SO2Cl2NH3NO2
Low alarm 19% 25 ppm 5 ppm 100 ppm 1 ppm 1.5 ppm 20 ppm 5 ppm
High Alarm 23% 25 ppm 5 ppm 100 ppm 1 ppm 1.5 ppm 20 ppm 5 ppm
STEL - 100 ppm 3.2 ppm - 0.3 ppm unknown 50 ppm 1
TWA - 20 ppm 1.6 ppm - 0.3 ppm unknown 20 ppm 0.5 ppm
For high and low alarm For TWA and STEL Alarm
Disclaimer: The default Set Points of these gases: H2, SO2, Cl2, NH3and NO2, are subject to change without notice.
Caution
Before changing alarm setpoints, please ensure the alarm set points are in compliance with
your local guidelines.
NOTE: STEL and TWA functions are unavailable for O2and H2variants.
Alarm values can be locked with the IR link

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5. Calibration
Caution
Initial calibration is performed on all devices prior to shipment. Once received, calibration
should be regularly depending on frequency of use.
4. Event Log
Last 30 events are stored on the PDM+. Once 30 events are stored, the oldest log events get
overwritten. Stored log events can be transferred via WatchGas-IR Link.
Each alarm event is recorded as follows:
• Types of alarms
• Alarm concentration in ppm or %
• Peak concentration
• Alarm duration
5.1. FRESH AIR CALIBRATION
2. Press and hold the key for 5 seconds to enter the calibration mode ( ), icon and ‘CAL’ mark will
appear on the LCD.
3. Press the key for three seconds to initiate calibration. When calibration begins, a countdown
(starting at 10) will appear on the screen.
Once completed, will appear on the LCD. The device will return to the calibration menu.
If calibration fails, will appear on the LCD. Check that the air is clean and that no contaminants are
blocking the sensor opening and try again. If fresh air calibration fails repeatedly, contact WatchGas.
Fresh AIr Calibration Standard Gas Calibration
3.5. DEFAULT CALIBRATION GAS CONCENTRATIONS
Gas O2CO H2S H2SO2Cl2NH3NO2
Concentration 18% Vol.
(99,9% N2)50 ppm 10 ppm 25 ppm 700 ppm 5 ppm 10 ppm
5ppm
10 ppm 50 ppm 5 ppm
1. Enter calibration menu.

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5.2. STANDARD GAS CALIBRATION
Attach the calibration adapter to the PDM+ and to a gas cylinder with a concentration matching the
calibration concentration. Check 3.1. Display Mode to check the calibration concentration.
Press and hold the key for 5 seconds to enter calibration mode ( ), icon and ‘CAL’ mark will
appear on the LCD. Press the key again for a second when CAL is displayed, to switch to standard gas
calibration, appears.
Start the ow of the gas cylinder by opening the valve.
Press the key for three seconds to initiate calibration. When calibration begins, a countdown will
appear on the screen. The duration of the countdown depends on the sensor type and can be change
by the IR link (congurable with WatchGas IR-Link). Conrm the calibration value by pressing the
button once.
To set the calibration setpoints, please follow the steps below.
• Press the button until the above calibration setpoint is displayed.
• Press and hold the button for three seconds and the rst digit of calibration setpoint starts to blink.
• To increase the value, press the button for one second .
• To save the calibration setpoints, press the button for 3 seconds.
• Calibration will start
Once completed, icon will appear several seconds on the display. Then, the device will return to
Detection mode.
5.3. REMAINING CALIBRATION DAY
In Measuring mode, scroll through the menu by pressing the button until the following is displayed:
The default setting is “N/A”.
To activate the remaining calibration day, set an interval on the
“Cal Interval(day)” via IR LINK.
If you set the calibration interval via IR LINK, the remaining day
will be displayed. To check the remaining day, press the button
until the above image is displayed.
Caution
Calibration should be performed in a fresh-air environment that is free for any contaminants
and other gases. Preferably, do not perform calibration in a conned space.

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5.4. RETURN TO DETECTING MODE.
In the standard calibration mode , press the key for a second to toggle fresh air calibration, standard
calibration, and ESC. In the ESC mode, press the key for 3 seconds, the PDM+ will get out of the
calibration mode and return to Detection mode.
NOTE: Span calibration value can be change in the device and IR link software
Once completed, will appear on the LCD. After a few
seconds, the PDM+ will return to Detection mode.
If calibration fails, will appear on the LCD.
Check that the gas cylinder is not empty and that is has not
expired. Also make sure that no contaminants are blocking the
sensor opening and try again. If standard gas calibration fails
repeatedly, contact WatchGas.
6. Self Test & Bump test
6.1 SELF TEST
The default interval of the Self-Test is 20hr, meaning the PDM+ will ask for a self test after each 20
hours of use. By default the Self-Test setting is turned o.
The interval is congurable via IR-Link between 8~20 hours. The self test can also be switched o via
IR-Link.
When the interval is activated, STS message will ash. The message will ash until users perform the
Self test.
Once you press the button, it will test buzzer, LED, Vibration, LCD, and show alarm thresholds. After the
test is completed, END message with icon will be displayed. (Users are required to check the test
processes.)
CALIBRATION CONCENTRATION.
Gas O2CO H2S H2SO2Cl2NH3NO2
Concentration 0.0%Vol.
(99,9% N2)100 ppm 50 ppm 500 ppm 10 ppm 10 ppm 100 ppm 10 ppm

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6.2. BUMP TEST
The interval of Bump test is 1~365days, and the default is switched o. To initiate the bump test, set
the bump test interval. Once the bump test interval expires, Bts message will ash.
Put the PDM+ in the docking station with a valid and full gas cylinder. Alternatively, attach the
calibration adapter to PDM+ and a valid and full gas cylinder. Press and hold the key for 3 seconds, the
TST message will be displayed for 45 seconds (To cancel, press the button for one second). Within the
45 seconds, start the ow from the gas cylinder. If no gas is applied, the bts message will ash again.
If the test is successful, SUC message with will be displayed for 30 seconds. Stop the ow, remove
the calibration adapter. If the test fails, FA message with , will be displayed and BTS message will be
ashing until the test is successful. If the bump test repeatedly fails, contact WatchGas.
7. Sensor & Battery Replacement
Caution
It is absolutely prohibited to replace battery at potential explosion or dangerous regions.
Replace the battery in a clean environment, which has no hazardous gases.
Replacement of components can invalidate the intrinsic safety function.
Replacing the sensor and battery should be performed by authorized sellers, agents,
distributors, or managers. Contact WatchGas if replacement is needed.
Disassembly should be necessary only for sensors & battery replacement. After the sensor
replacement, Fresh air and SPAN calibration should be done. Before disassembling, please
turn o the power and remove screws.
Only use SB-AA02 3.6V battery.
7.1. SENSOR REPLACEMENT
1. Deactivate the detector
2. Remove the 6 screws on the back case and carefully open te case.
3. Remove the 2 screws on the PCB board.
4. After removing the battery, replace with the new sensor matching with the gas type. For instance,
If you have the PDM+ CO, the CO sensor should be used for the replacement.
5. Assemble the detector.
6. Have the sensor stabilized for 5 minutes before use.
7. After assembling, perform the fresh air calibration and standard calibration with the concentration
in this manual.
8. Check the settings.

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7.2. BATTERY REPLACEMENT
1. Deactivate the detector
2. Remove the 6 screws on the back case.
3. Replace battery with original SB-AA02 3.6V battery only
4. Assemble the detector.
5. After assembling, perform the fresh and standard calibration.
6. Before use, have the sensor stabilized for 5 minutes. Some sensor may require al longer
stabilization time.
8. Specications
8.1. GENERAL SPECIFICATIONS
Model Detectable Gas Ranges Resolution Article Numbers
PDM+ O 0-30%vol 0.1%vol 7192002
PDM+ CO 0-500ppm 1ppm 7192001
PDM+ HS 0-100ppm 0.1ppm 7192000
PDM+ H20-1000 ppm 1 ppm 7192006
PDM+ SO 0-20ppm 0.1ppm 7192005
PDM+ NH 0-100ppm 1ppm 7192003
PDM+ HO NON-ATEX 0-99 ppm 0.1 ppm 7192007
PDM+ NO2 0-20 ppm 0.1 ppm 7192004
Size 54mm(W) x 91mm(H) x 32mm(D)
Weight 93g (Toxic), 104g (O2) (Battery, clip included)
Sensor technology Electrochemical Cell
Temperature -40ºC ~ +50ºC (for Toxic) / -35ºC ~ +50ºC (for O2)
Humidity 5% ~ 95% RH (Non-condensing)
Alarm type High Alarm, Low Alarm, TWA Alarm, STEL Alarm,
Over range Alarm, Battery low alarm, Cal due alarm
Alarm signal
Acoustic: 95dB @ 30cm
Visual: Red ashing LED’s
Vibration: Vibration
Display LCD Display
Calibration 2-point calibration, zero and span.
Event log 30 Most recent events
Battery DC 3.6V, 1.2Ah Lithium battery, changeable
Measurement Diusion
Housing Polycarbonate and rubber
IP-Rating IP67
Safety certications ATEX: II 1g Ex ia IIC T4 Ga
INMETRO: Ex ia IIC T4 Ga
IECEx: Ex ia IIC T4 Ga
Warranty 24 months, based on 2 minutes of alarm per day
8.2. SENSOR SPECIFICATIONS

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9. Certificates
Intrinsic Safety: The detector is in conformity of the following standards
IECEx: Ex ia IIC T4 Ga
IECEx IECEx KTL 19.0019X
ATEX: 2198 II 1 G Ex ia IIC T4 Ga IP67
KRH 19 ATEX 1022X
Directive 2014/34/EU
KCS: Ex ia IIC T4
KTL 19-KA2BO-0491X
INMETRO Ex ia IIC T4 Ga
BRA-19-GE-0022X
Compliance: Electromagnetic Compatibility Directive 2014/30/EU
Standards:
The electrical apparatus and any acceptable variations to it specied in the schedule of this certicate
and the identied documents, was found to comply with the following standards:
• IEC 60079-0: 2011 Ed. 6
• IEC 60079-11: 2011 Ed 6
• IEC 60079-26 : 2014-10 Ed 3
• EN 60079-0: 2012+A11:2013
• EN 60079-11: 2012
Manufacturing Approval:
The detector manufacturer is certied compliant with ISO 9001:2000 provisions
51 2 3 4 1. Explosion Protected
2. Protection Concept
3. Gas Group
4. Temperature Classication
5. Equipment Protection level

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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 B.V.
Sextantstraat 61
2901 ZZ Capelle aan den IJssel
[phone]
The Netherlands
[e-mail] - www.watchgas.eu
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