General Tools and Instruments LRTH185DL - Manual (Page 19)

18
13 Maintenance
„ Do not use the meter in an environment with severe
change; do not store the unit in an environment with
high temperature, high humidity, and high vibration
„ Take battery off if the meter has not been used for a
long period of time
„ The Diode temperature probe is used to measure
temperature and the capacitive humidity sensor is
used to measure take humidity
„ The thermocouple and humidity sensor will start
aging under the influence of oxidation, reduction,
corrosion, pollution, vaporization, diffusion or other
metallurgy. The aging process will affect its precision
seriously.
„ Cleaning and inspection of temperature probe:
The smoke, coal, dust, grease attached on the
protective tube of temperature probe will slow down
the heat conduction of the thermocouple and cause
measuring error. Therefore, it should be cleaned
periodically. The metal coating of thin thermocouple
should be replaced properly upon the occurrence of
corrosion.
„ Cleaning and inspection of humidity sensor:
The smoke and dust attached on the humidity sensor
will slow down the function of humidity sensor and
cause measuring error. Therefore, it should be
cleaned periodically. Blow off the dust with mild
compressed air instead of water or alcohol. The
aluminum plate inside the humidity sensor should be
replaced upon the occurrence of corrosion.