watchgas PDM 3.4 Single Gas Detector User Manual

: June 15, 2024
: WatchGas

Table of Contents

watchgas PDM 3.4 Single Gas Detector
Product Information
PRODUCT OVERVIEW
ACTIVATION
MODE
EVENT LOG
CALIBRATION
SELF TEST & BUMP TEST
SPECIFICATIONS
CERTIFICATES
LIMITED WARRANTY
Read User Manual Online (PDF format)
Download This Manual (PDF format)

watchgas PDM 3.4 Single Gas Detector

Product Information

Specifications

Product : PDM Single gas detector
Gas Detection : Oxygen and toxic gases
Display : LCD display
Alarm : Buzzer and optical alarm LEDs
Communication : IR communication port

Product Overview
The PDM Single gas detector is designed to monitor gas concentrations in environments where it may not be safe for humans. It provides accurate readings for oxygen and toxic gases. The device consists of various components including a gas sensor, LCD display, button, buzzer, optical alarm LEDs, and an IR communication port.

Activation
To activate the PDM Single gas detector

Ensure you are in a safe environment.
Press and hold down the button ( ) for three seconds.
The monitor will turn on and display the gas type and firmware version.
During a 10-second countdown, the device will stabilize itself.
After stabilization, the device will enter the Measuring mode.

If stabilization fails, perform calibration or contact an authorized reseller for repair/return information.

Mode

Measuring Mode
In the detection mode, the gas concentration or remaining life will appear on the screen. Oxygen concentration is displayed in percent by volume (%Vol) and toxic concentration is displayed in parts per million (ppm).

Display Mode
In the Detection Mode, press the button for one second to cycle through the following icons

Oxygen concentration (only for oxygen)
CLR
Remaining Life time ( , , )
Low alarm set point
High alarm set point
Firmware version
Calibration Concentration

If no button is pressed for a second, the PDM will return to the Measuring mode.

Alarms / Battery / Test Failure Display
When a gas concentration exceeds alarm set points, or remaining life is low, the device will display alarms, vibrate, flash its LEDs, and beep. To stop the alarms, evacuate immediately to a clean air location. The gas concentration will decrease and the alarm will stop.

Event Log
The event log feature allows you to view past gas concentrations and other events. Refer to the user manual for detailed instructions on using the event log.

Calibration

Fresh Air Calibration
To perform fresh air calibration

Ensure you are in a clean air environment.
Access the calibration menu on the device.
Select the fresh air calibration option.
Follow the on-screen instructions to complete the calibration process.

Standard Gas Calibration
To perform standard gas calibration

Obtain a standard gas of known concentration for calibration.
Access the calibration menu on the device.
Select the standard gas calibration option.
Follow the on-screen instructions to introduce the standard gas and complete the calibration process.

Return to the Detection Mode
To return to the Detection Mode after calibration

Ensure the calibration process is complete.
Exit the calibration menu on the device.
The device will automatically return to the Detection Mode.

Self Test & Bump Test

Self Test
The self-test feature allows you to check the device’s functionality. Refer to the user manual for detailed instructions on performing a self-test.

Bump Test
The bump test feature allows you to verify the device’s response to a known concentration of gas. Refer to the user manual for detailed instructions on performing a bump test.

Specifications
The specifications of the PDM Single gas detector are as follows

Gas Detection: Oxygen and toxic gases
Display : LCD display
Alarm : Buzzer and optical alarm LEDs
Communication: IR communication port

Certificates
The PDM Single gas detector is certified to meet certain safety standards. Refer to the provided certificates for more information.

Limited Warranty
The PDM Single gas detector comes with a limited warranty. Refer to the warranty documentation for terms and conditions.

FAQ

Q: How do I activate the PDM Single gas detector?
A: In a safe environment, press and hold down the button ( ) for three seconds. The device will turn on and stabilize itself before entering the Measuring mode.
Q: What should I do if the device fails to stabilize during activation?
A: If stabilization fails, perform calibration or contact an authorized reseller for repair/return information.
Q: How do I perform fresh air calibration?
A: Ensure you are in a clean air environment, access the calibration menu on the device, select the fresh air calibration option, and follow the on- screen instructions to complete the calibration process.
Q: How do I perform standard gas calibration?
A: Obtain a standard gas of known concentration, access the calibration menu on the device, select the standard gas calibration option, and follow the on-screen instructions to introduce the standard gas and complete the calibration process.
Q: How do I stop the alarms?
A: When a gas concentration exceeds alarm set points or remaining life is low, evacuate immediately to a clean air location. The gas concentration will decrease and the alarm will stop.

DESCRIPTION
The PDM is a portable single gas monitor designed to warn the user about the presence of dangerous concentrations of oxygen, combustible, or toxic gases in the atmosphere. It is simple to operate. The PDM alerts the workers to danger through acoustic alarm, flashing LEDs, and vibration when the concentration exceeds the safety gas levels. The PDM shows the gas concentration in real time and identifies the maxi-mum and minimum concentration. The settings values can be modified through the optional WatchGas IR-Link.

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 fire, lightening, or other hazard, voids liability of the manufacturer.
Before each day of use preform a test using a known concentration of target gas above the alarm thres-hold(s), to ensure proper sensor response and alarm functionality.
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 environ-ment 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 hu-midity) Therefore, calibration of PDM 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 PDM after the gas concentration value has stabilized.
Severe vibration or shock to the device may cause a sudden reading change Please use PDM after the value of gas concentration has stabilized Excessive shock to PDM 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.
Do not attempt to replace the battery and sensor as PDM is designed to be disposable Changing the battery and sensor may impair intrinsic safety and the attempt will void warranty.

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 O2 detector, 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 chemical 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 3. Connect with the PDM IR Link frequently except the bump testing View a serial number on the label at the back side of the device.

PRODUCT OVERVIEW

DETECTOR COMPONENTS

Gas sensor
Gas type sticker
LCD display
Button
Buzzer
Optical alarm LEDs
IR communication port

DISPLAY SYMBOLS

ACTIVATION

In a safe environment, press and hold down the button ( ) for three seconds, after the three second countdown the monitor will turn on. Gas type and firmware version (eg. 1.2.6) will be displayed. During a 10 seconds countdown, the device will stabilize itself. After stabilization is complete, V will appear on the display screen and the device will move to the Measuring mode.

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.

CAUTION
Appropriate calibration of the device is required prior to operation. Always ensure that the device makes the proper detection response to the pertinent gas. Verify that debris that could interfere with the detection of gas are not blocking the area where gas is to be detected.

MODE

MEASURING MODE
When activated, in the detection mode, gas concentration or remaining life appears on the screen. Oxygen concentration is displayed in percent by volume (%Vol) and toxic concentration is displayed in parts per million (ppm). per million (ppm). DISPLAY MODE
In the Detection Mode, by pressing push the button for one second, the following icons will appear in order: (only for oxygen) -> -> CLR -> Remaining Life time( ) ->Low alarm set point ->High alarm set point -> Firmware version -> Calibration Concentration

At the last step, if you press the key or do not push any button for a second, the PDM will re-turn to Measuring mode.

ALARMS / BATTERY / TEST FAILURE DISPLAY
When a gas concentration exceeds alarm set points, or will be displayed and the device will vibrate, flash its LEDs, and beep. To stop alarms, evacuate immediately to a clean air locati-on. The gas concentration will decrease and the alarm will stop.

CAUTION
The alarm limits are set based on international standards. Only change these levels to make them conform to local rules and regulations.

ALARM SET POINTS

Gas| O 2| CO| H 2 S| H 2| SO 2| NH 3| NO 2
---|---|---|---|---|---|---|---
Low alarm| 19%| 25 ppm| 5 ppm| 100 ppm| 1 ppm| 20 ppm| 5 ppm
High Alarm| 23%| 25 ppm| 5 ppm| 100 ppm| 1 ppm| 20 ppm| 5 ppm

NOTE: Alarm setpoints can be changed using via WatchGas IR link.

DEFAULT CALIBRATION CONCENTRATIONS

Gas| O 2| CO| H 2 S| H 2| SO 2| NH 3| NO 2
---|---|---|---|---|---|---|---
Concentration| 18.0% Vol.| 50 ppm| 10 ppm| 500 ppm| 5 ppm| 50 ppm| 5 ppm

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

CALIBRATION

CAUTION
Initial calibration is performed on all devices prior to shipment. Once received, calibration should be regularly depending on frequency of use.

FRESH AIR CALIBRATION
To enter the calibration menu press the button x times untill the calibration concentration is dis-played. Then hold down the button for 3 seconds. Press and hold the key for 5 seconds to enter the calibration mode ( ), icon and ‘CAL’ mark will appear on the LCD.
Press the key for three seconds to initiate calibration. When calibration begins, a countdown (starting at 10) will appear on the screen. Once completed, V will appear on the LCD. If calibration fails, X 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. ****

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 confined space.

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, to switch to standard gas calibration, appears.
Start the flow of the gas cylinder by opening the regulator.
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 upon the sensor type and can be changed using the WatchGas IR link.
Once completed, V will appear on the LCD. After a few seconds, the PDM will return to Measuring mode.
If calibration fails, X 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.

CAUTION
After calibration always verify sensor response and alarm functionality prior to using the detector by applying a known concentration of gas from another gas cylinder.

REMAINING CALIBRATION DAY
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.

SELF TEST & BUMP TEST

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.

The interval is configurable via IR-Link between 8~20 hours. The self test can also be switched off via IR-Link.
When the interval is activated, STS message will flash. The message will flash 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 V icon will be displayed. (Users are required to check the test processes.)

BUMP TEST

The interval of Bump test is 1~365days, and the default is switched off. To initiate the bump test, set the bump test interval. Once the bump test interval expires, Bts message will flash.
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 flow from the gas cylinder. If no gas is applied, the bts message will flash again.
If the test is successful, SUC message with V will be displayed for 30 seconds. Stop the flow, remove the calibration adapter. If the test fails, FA message with X , will be displayed and
BTS message will be flashing until the test is successful. If the bump test repeatedly fails, contact WatchGas.

NOTE: Calibration can be done with the Docking Station.

SPECIFICATIONS

SIZE	48mm(W) x 85mm(H) x 22mm(D) (Sensor and clip excluded)
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, Over range alarm, Battery Alarm
ALARM SIGNAL	Acoustic: 95dB @ 30cm Visual: Red flashing LED’s

ATEX: II 1G Ex ia IIC T4 Ga
CSA: Class 1, Zone 0, Ex ia IIC T4 Ga INMETRO: Ex ia IIC T4 Ga
IECEx: Ex ia IIC T4 Ga
CE: Conformité Européenne

SENSOR LIFE| 24 months with Normal Alarm Use 1 time and 2 minutes per day
WARRANTY| 24 months

SENSOR SPECIFICATIONS

MODEL| DETECTABLE GAS RANGES| RESOLUTION| ARTICLE NUMBER
---|---|---|---
PDM O₂| 0-30% vol| 0.1% vol| 7181411
PDM CO| 0-500 ppm| 1 ppm| 7181412
PDM H₂S| 0-100 ppm| 0.1 ppm| 7181413
PDM SO₂| 0-50 ppm| 0.1 ppm| 7181414
PDM NH3| 0-100 ppm| 1 ppm| 7181415
PDM H₂| 0-1000 ppm| 1 ppm| 7181416
PDM NO₂| 0-20 ppm| 0.1 ppm| 7181417

CERTIFICATES

Intrinsic Safety
The detector is in conformity of the following standards

IECEx: Ex ia IIC T4 Ga
IECEx KTL 15.0018
Ex ia IIC T4 Ga
Class I, Zone 0, AEx ia IIC T4 Ga
Class I, Division 1, Groups A, B, C, D, T4
C22.2 No. 60079-0:2015; C22.2 No. 60079-11:2014;
C22.2 No. 61010-1-12:2010; UL 61010-1,
Ed. 3; UL 913, Ed. 8; UL 60079-0, Ed. 6; UL 60079-11, Ed. 6
ATEX: 2198 II 1 G Ex ia IIC T4 Ga IP67
KRH16ATEX1048 Directive 2014/34/EU
KCS: Ex ia IIC T4
KTL 16-KA2BO-0457
INMETRO Ex ia IIC T4 Ga
BVC16.5919/02

Compliance: Electromagnetic Compatibility Directive 2014/30/EU

Standards
The electrical apparatus and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was found to comply with the following standards:

IEC 60079 0: 2011 Ed. 6
IEC 60079 11: 2011 Ed 6
UL 61010 1, Ed. 3
UL 913, Ed. 8
UL 60079 0, Ed. 6
UL 60079 11, Ed. 6
C22.2 No. 60079 0:2015
C22.2 No. 60079 11:2014
C22.2 No. 61010 1 12:2012
EN 60079 0: 2012+A11:2013
EN 60079 11: 2012

Manufacturing Approval
The detector manufacturer is certified compliant with ISO 9001:2000 provisions

LIMITED WARRANTY

WatchGas warrants this product to be free of defects in workmanship and materials-under nor-mal 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 at-tempt to repair or modify the product, or any other cause of damage beyond the range of the intended use, including damage by fire, lightening, water damage or other hazard, voids liability of the manufacturer.
In the event that a product should fail to perform up to manufacturer specifications during the applicable warranty period, please contact the product’s authorized reseller or WatchGas service center at info@watchgas.com for repair/return information.

FOR MORE INFORMATION