Hitachi CHROMASTER 5160 Instruction Manual page 693

4.1 How to Check the Specifications and Performance
4.2 Periodical Inspection
No. Check Item
1 Drain tray
2 Liquid leak from flow path
3 Temperature control
operation
4 Gas leak sensor operation
5 Liquid leak sensor operation
6 Temperature setting
accuracy
7 Temperature control
accuracy
4.3 Adjustment
4.3.1 Alarm Level Adjustment for Gas Leak Sensor
Frequency
Daily
Daily
Monthly
Monthly
Monthly
Yearly
Yearly
If gas leak detection is not made during the operational check of
the gas leak sensor, or if a gas leak error occurs despite there
being no leakage, then the alarm level of the gas leak sensor
must be adjusted. Carry out the adjustment in the procedure
given below.
NOTE: 1. A gas leak error won't occur even if the sensor output
exceeds the alarm level on the gas leak sensor
monitor screen. And, since the sensor output is
unstable for about 5 minutes after turning ON the
power switch, gas leak detection is not made during
this while.
2. The sensor output will vary somewhat according to
the environment in the room where the instrument is
installed.
Normally in an environment where there is air alone,
the output is adjusted to indicate a range of about 200
to 800.
3. Detection sensitivity varies with the type of solvent.
When using an organic solvent having a low vapor
pressure or a solvent having a large water content,
gas leak detection may fail. Please use the liquid
leak sensor in combination because the gas leak
sensor operates only when a flammable organic
solvent is used. Make sure to check visually that
there is no liquid leakage.
4 - 8
Check Method
Check the drain tray for any contamination or
dust to be cleaned.
Check tubing and connections for any liquid
leakage.
Carry out inspection as in 4.1.2.
Carry out inspection as in 4.1.3.
Carry out inspection as in 4.1.4.
Carry out inspection as in 4.1.5.
Carry out inspection as in 4.1.6.