13
◆
Prohibit drop from high space.
◆
Under the high temperature or pressure is not allowed to use, if high
humidity, then need to add the device to decrease the humidity.
◆
Human damage is not free repair.
◆
Before enter into dangerous area, people need to be electrostatic
discharged, then bring the detector into the working place.
◆
Using the special charger for this detector.
8.Common faults and treatments
◆
Value display not stable, up and down
Reason
：
some electrochemical sensor easily effected by other gas,
maybe is colorless and odorless.
Solution
：
Bring the detector into clean air, then the data will decrease to
normal value; If still not normal, then zero calibrate in clean air.
◆
Response weak
Reason
：
Lower level of oxygen
：
<5%VOL
；
High pressure, pump not work
；
The sensor useful life end, or other faults
；
Solution
：
If the Electrochemical sensor, Catalytic combustion sensor,
Semiconductor sensor, need oxygen to work, so the level
of oxygen should more than 5%VOL
，
pressure range is
：
-30Kpa
～
100Kpa
，
If user have calibrate gas, can import
the gas to test and target point calibrate. If oxygen and
pressure both normal, then maybe other faults, need to
send back to manufacturer.
◆
After access the detecting gas, the data can’t stable for a long time, up
and down
Reason
：
Maybe the too low content of oxygen in the detecting gas, or
the change of the detecting gas.
Solution
：
Increasing the oxygen level and keep stable flow rate, or
