WatchGas PDM Single Gas Detector User Manual

WatchGas PDM Single Gas Detector

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 maximum 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.
• 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 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

1. Gas sensor
2. Gas type sticker
3. LCD display
4. Button
5. Buzzer
6. Alarm LEDs
7. IR port

DISPLAY SYMBOLS

Activation

Note: Information about production dates?
Please contact WatchGas by calling +31 (0)85 01 87 709 or by sending us an e-mail to: info@watchgas.nl

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, 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

MEASUREMENT 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).

DISPLAY MODE
In the Detection Mode, by pressing push the button for one second, the following icons will appear in order:
MIN (only for oxygen) -> MAX -> 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 return to Measuring mode.

ALARMS / BATTERY / TEST FAILURE DISPLAY
When a gas concentration exceeds alarm set points, 1 or 2 will be displayed and the device will vibrate, flash its LEDs, and beep. To stop alarms, evacuate immediately to a clean air location.
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
Alarm setpoints can be changed using WatchGas IR link

Gas| O 2| CO| H 2S| H 2| SO 2| Cl 2| NH 3| NO 2
---|---|---|---|---|---|---|---|---
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

DEFAULT CALIBRATION CONCENTRATIONS

GaS| O 2| CO| H 2S| H 2| SO 2| Cl 2| NH 3| NO 2
---|---|---|---|---|---|---|---|---
Concentration| 0,0% Vol.

(99,9% N2)

| 100 ppm| 50 ppm| 500 ppm| 10 ppm| 10 ppm| 100 ppm| 10 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 displayed.
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.

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.

RETURN TO THE MEASUREMENT 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.

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 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 will be displayed for 30 seconds. Stop the flow, remove the calibration adapter. If the test fails, FA message with , 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

Over range alarm, Battery Alarm

Alarm signal

| Acoustic: 95dB @ 30cm Visual: Red flashing LED’s Vibration alarm
Display| LCD Display
Calibration| 2-point calibration, zero and span
Event log| 30 Most recent events
Battery| DC 3.6V, 1.2Ah Lithium battery
Measurement| Diffusion
Housing| Polycarbonate and rubber
IP-Rating| IP67
Safety certifications| ATEX:

II 1g Ex ia IIC T4

| CSA:

1, D1,

Groups A, B, C, D, T4

| INMETRO:

Ex ia IIC T4 Ga

| IECEx:

Ex ia IIC T4 Ga

| CE:

Conformité Européenne

| EAN:
Sensor Life| 24 months
Warranty| 24 months

Sensor Specifications

Certificates

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

WATCH AS 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 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 +31 (0)85 01 87 709 for repair/return information.

WatchGas B.V.
Sextantstraat 61
2901 ZZ Capelle aan den IJssel
+31 (0)85 01 87 709
The Netherlands
info@watchgas.eu – www.watchgas.eu
V3.1

References

• Gas detection systems for a safe work environment

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