1) When using LD239 for flammable gases leakage, make sure the
sufficient ventilation in the room.
2) The sensitivity of the detector comes to be extremely worse when the
surrounding contains the leaking gas.
3) Sensitivity of LD239 can be affected by wind. Please be careful for
outdoor use.
4) Do not use the detector to detect corrosive gases.
5) LD239 is not a quantitative device, rather it is designed to detect leaks in
gas line connections commonly associated with laboratory equipment.
6) Do not use the detector in environments that are contaminated with dust
or combustible fumes.
7) Do not use the detector outside of its specified temperature range
(10 - 40 °C).
8) Do not use the detector in a wet environment or come into contact with
any solvents.
9) Do not expose the detector to shock.
10) Ensure the device is in a stable condition during operation.
11) LD239 has sample gas line and reference gas line. Both lines are
attached filters but they are not effective for liquid samples. Do not
aspirate liquid samples.
12) Decrease of sensitivity can be caused by filter clogging. Please replace a
filter at sample line or reference line.
(Refer to “7. Replacement of service parts” )
13) Do not block the tip of the Sample Probe and Reference Port. Especially
please be careful not to press the Sample Probe against the object.
14) The detector gives a positive response to water vapor in the air. Such as
skin vapor or soapy water can be detected as gas leakage.
15) Please wait for several seconds before re-closing power.
16) LD239 may become warm during charging. This is normal and does not
indicate a malfunction.
17) Do not turn on the power of the detector while its battery is being
recharged.
18) Do not use the detector for 30 minutes to stabilize it's temperature after
recharging.
19) Attach a charging terminal cap except charging.
20) Please use LED in addition to LCD display only when needed to save the
drain on battery power.
2. Operational Notices
2
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