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D e t e c t i o n
User Manual
Single Sustainable Gas Detector PDM+
D e t e c t i o n
Description
PDM+ is a single sustainable gas detector designed to detect oxygen deficiency 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 specific 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 configuration can be changed via WatchGas IR Link (Optional). After use, the
instrument can be turned off.
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 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
