Do not use detector in areas without sufficient ventilation when detecting
trace amounts of flammable gases like Hydrogen!
CAUTION!
Do not open the detector’s body except replacing a battery.
Do not use the supplied with the detector USB cable for other equipment.
When charging battery, make sure that the detector is switched off.
2.2 Operation Cautions and Notes
Do not use the detector for corrosive gases leak detection.
LD239 may become warm during battery charging. This is normal and does not indicate a
malfunction.
LD239 is not a quantitative device. It is designed to indicate leaks in gas line connections
commonly associated with laboratory equipment.
Sensitivity of LD239 can be affected by wind. Take it into account when using LD239
outdoor.
Decrease in the detector sensitivity can be caused by filter clogging. Please replace filter
at the sample and/or reference lines if decrease in sensitivity is suspected.
Do not block tip of the sample probe and/or the reference port. Do not touch (press
against) any object with the sample probe while searching for leak.
The detector gives a positive response to water vapor in the air. Skin or wet surface vapor
can be detected as a gas leak.
Be aware that the detector’s sensitivity will be strongly affected if it is used in an area
containing large gas leak(s).
Do not expose the detector to shock, wet environments, solvents, or temperatures
outside its specified range.
Ensure the device is in a stable condition during operation.
2.3 Battery Notes
LD239 has a rechargeable lithium-ion battery. Before using the product for the first time,
or before using the product following an extended period of no use, recharge the battery.
If PC with a USB port is not available, use a commercial AC-DC adaptor with a USB output
connector.
When the LCD is blank or "Low Battery” error is indicated, the battery is low and must be
recharged. A LED light in the lower left side of the display indicates that battery is being
charged. When battery is fully charged, the LED goes off. It takes approx. 2.5 hours to
fully recharge the battery. When fully charged, LD239 provides approx. 5 hours of
continuous service assuming that the following settings are used: Standard Range, LED
OFF, Buzzer OFF.
When the battery is fully charged, disconnect the USB cable from the PC and the detector.
In case the detector remains connected to a PC for a long time, the detection may get
unstable because of heat generated during the battery charging.
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