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WatchGas PDM DUO User Manual

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USER MANUAL
PDM DUO
V1.2 03.10.24
we watch gas where you can't

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Summary of Contents for WatchGas PDM DUO

  • Page 1 USER MANUAL PDM DUO V1.2 03.10.24 we watch gas where you can't...
  • Page 2 CONTENTS WARNING CAUTION SPECIAL CONDITIONS FOR SAFE USE 1. PRODUCT OVERVIEW 1.1. Product Introduction 1.2. Product Features 1.3. Product Specifications 1.4. Gas Types 2. COMPONENTS 2.1. External Components 2.2. LCD Display Symbols 2.3. Interface 2.3.1. Visual Display 2.3.2. Display Icons 2.3.3. One-Button Operation 3.
  • Page 3 Do not expose the detector to poisons such as alcohol or citrus-based products. Poisons can compromise the accuracy and response time of the device. • If sensor contamination is suspected, confirm using calibration, bump tests, etc. • This detector is designed to be used in explosive atmospheres where oxygen levels do not exceed 20.9% (v/v). Some sensor outputs may be suppressed in oxygen-deficient environments (<10% v/v). • Do not charge primary cell batteries. Replace the battery at a WatchGas authorized service center before it is fully discharged. • Do not calibrate the device when it has been exposed to conditions representing the IP rating. • Use dedicated calibration caps or calibration equipment for calibration. • Do not perform calibration during the device's stabilization process after power-up.
  • Page 4 PDM DUO User manual • Check for obstructions, debris, or blockages in the gas inlet every day before use. If the gas inlet is blocked by contaminants, the actual detected concentration may be measured lower than the normal level. • The device should be carried at all times and not left unattended. • If there is a mechanism that generates charges, the exposed metal parts of the enclosure may store electrostatic charges at levels that could be ignitable for IIC gases. Therefore, users/installers should take the aforementioned precautions to prevent static accumulation.
  • Page 5 1. PRODUCT OVERVIEW 1.1. PRODUCT INTRODUCTION The PDM DUO is a portable diffusion-type gas detector that alerts users to hazardous environments related to gases. The detector displays the concentration of oxygen, explosive, or toxic gases on an LCD monitor. It is easy and simple to operate, and alerts the operator of danger through an alarm, LED, and vibration if the gas concentration exceeds the safe limit. This device displays real-time gas concentrations and identifies maximum and minimum levels. Settings can be adjusted wirelessly or via the WatchGas IR-LINK (optional). 1.2. PRODUCT FEATURES • Equipped with a miniaturized electrochemical gas sensor • Wireless communication functionality • Excellent waterproof and dustproof construction • Replaceable battery design • Power On/Off capability 1.3. PRODUCT SPECIFICATIONS Model Name PDM DUO Sensor Type...
  • Page 6 PDM DUO User manual PDM DUO-1 to 2: Approximately 0.5 years (8 hours of daily use, wireless off) PDM DUO-3 to 9, PDM DUO-A to F: Battery Life Approximately 2 years (8 hours of daily use, wireless off) ※ Battery life may vary depending on usage conditions and environ- ment. Calibration The detector can be calibrated in an appropriate environment as need- Interval Accessories Calibration cap 1.4. GAS TYPES The detector can monitor various types of gases, including oxygen, explosive gases, and toxic gases. It is available in configurations that detect oxygen and explosive gases, oxygen and toxic gases, or toxic and toxic gases. Model Name Gas Type Model Ch-A...
  • Page 7 2. COMPONENTS 2.1. EXTERNAL COMPONENTS The PDM DUO is a portable diffusion-type gas detector that alerts users to hazardous environments related to gases. The detector displays the concentration of oxygen, explosive, or toxic gases on an LCD monitor. It is easy and simple to operate, and alerts the operator of danger through an alarm, LED, and vibration if the gas concentration exceeds the safe limit. This device displays real-time gas concentrations and identifies maximum and minimum levels. Settings can be adjusted wirelessly or via the WatchGas IR-LINK (optional). 2.2. LCD DISPLAY SYMBOLS • Low Alarm • Battery or Calibration Date Check • 1ST Warning • Countdown • Calibration Success • High Alarm • Software Version Check • 2nd Warning •...
  • Page 8 PDM DUO User manual 2.3. INTERFACE 2.3.1. Visual Display The detector features an LCD (Liquid Crystal Display) that shows the following: • Gas type monitoring • Alarm levels triggered: low or high (including ppm or %vol concentration levels) • Alarm settings: low and high Peak (maximum) alarm exposure 2.3.2. Display Icons The LCD of the detector also includes icons that clearly indicate: • Alarm type and alarm level • Diagnostic warnings 2.3.3. One-Button Operation • Activate the detector • Display alarm set points •...
  • Page 9 3.2. SYSTEM SHUTDOWN In measurement mode, pressing and holding the button for 3 seconds will display a system shutdown countdown on the LCD. 3.3. CONFIGURATION MODE In measurement mode, press the button briefly to switch modes. The device features several modes, as shown in the illustration below. Each mode is distinguished by the active icon displayed on the top screen.
  • Page 10 PDM DUO User manual 3.4. CALIBRATION For calibration on the device, move the clean atmosphere. And then, perform the zero calibration and span calibration. Ensure to use the exclusive calibration cap or device for calibration. Note that calibration cap must be equipped toward upward arrow pointing. Calibration Cap for PDM DUO series...
  • Page 11 3.5. STANDARD GAS CONCENTRATION FOR CALIBRATION Be use the standard gas and concentration for each sensor when it’s calibrating. Standard gas concentration can be changed using IR-LINK program. Measurement Info. Cal. Standard Sensor type Concentration Range Resolution 0 to 100 Methane NDIR 1 %LEL 50 %LEL %LEL Carbon dioxide NDIR 0 to 5 %vol 0.01 %vol 2 %vol Oxygen Electrochemical 0 to 30 %vol 0.1 %vol 18 %vol...
  • Page 12 PDM DUO User manual 3.7. SPAN CALIBRATION Span calibration means standard gas concentration correction. On the Calibration mode, Press and hold the button for 2 seconds to enter the sub menu. Press and hold the button when the span-calibration icon is on the display. Select the channel which is implemented span...
  • Page 13 3.8. JUDGEMENT FOR IMPLEMENTING Result for calibrating is on the display for each gas channel after implementing. 3.9. PEAK (MAX) VALUE When gas is detected, the detector records the maximum exposure concentration. The recorded value can be cleared. 3.10. ALARM DISPLAY The detector monitors gas concentrations and displays the alarm status when the gas concentration exceeds the alarm set point. 3.11. ACQUIRING ALARM EVENTS Data stored in the detector's memory can be downloaded via IrDA. The stored information includes calibration events, LOW and HIGH alarms (including time of occurrence, duration, and gas concentration).
  • Page 14 PDM DUO User manual 3.12. LOG During operation, data, event, calibration, and bump test logs are stored. The stored data can be downloaded using WatchGas IR-LINK and a PC program. Category Details Event Alarms (High, Time of occurrence, duration, alarm type, gas concentration, serial Low, TWA, STEL) number Test date, success/failure, calibration gas concentration, detected con- Bump Test Logs centration Calibration date, type, calibration gas concentration, detected concen- Calibration Logs tration Data Logs Date and time of IR-LINK execution, concentration, alarm type, options 4. ALARM / TEST FAILURE 4.1. ALARM FUNCTION When the gas concentration exceeds the alarm set value, the alarm status is displayed on the LCD, and the device vibrates, flashes (LED), and emits a beep. To stop the alarm, move to an area with clean air, and the alarm will automatically stop.
  • Page 15 4.3. ALARM SOUND, VIBRATION, LED, AND DISPLAY (PER SECOND) Category Details Low Alarm The Low icon on the top screen is illuminated. High Alarm The High icon on the top screen is illuminated. TWA Alarm The TWA icon on the top screen is illuminated. STEL Alarm The STEL icon on the top screen is illuminated. 5.
  • Page 16 PDM DUO User manual 6. PROTECTION RATING The detector's IP Rating should be assessed as IP67. The product complies with Directive 2014/30/EC (EMC). 7. WARRANTY AND REPAIR WARNING • Never replace the battery in explosive or hazardous areas. • Replace the battery in a clean environment free of hazardous gases, as failure to do so may lead to severe accidents (serious injury or fatality). • Replacing parts may invalidate the intrinsic safety features. • Sensor and battery replacement should be performed by authorized dealers, distributors, or managers. • Only sensors designated by WatchGas should be used for replacement. • Disassembly is only necessary for sensor and battery replacement. After sensor replacement, a Span gas calibration must be performed.
  • Page 17 8. CONTACT INFORMATION EUROPE Klaverbaan 121, 2908 KD Capelle a/d IJssel, the Netherlands info@watchgas.com www.watchgas.com AMERICAS 313 N. State Hwy 342, Red Oak, TX 75154, USA info@watchgasusa.com www.watchgasusa.com APAC Woods Square Tower 1, 12 Woodlands Square, #11-71, Singapore 737715 +65 65179551 info@watchgas.com www.watchgas.com anz@watchgas.com...