Hitachi CHROMASTER 5160, Instruction Manual

Page: 693 / 1022

4.1 How to Check the Specifications and Performance
4.2 Periodical Inspection
No. Check Item Frequency Check Method
1 Drain tray Daily Check the drain tray for any contamination or
dust to be cleaned.
2 Liquid leak from flow path Daily Check tubing and connections for any liquid
leakage.
3 Temperature control
operation
Monthly Carry out inspection as in 4.1.2.
4 Gas leak sensor operation Monthly Carry out inspection as in 4.1.3.
5 Liquid leak sensor operation Monthly Carry out inspection as in 4.1.4.
6 Temperature setting
accuracy
Yearly Carry out inspection as in 4.1.5.
7 Temperature control
accuracy
Yearly Carry out inspection as in 4.1.6.
4.3 Adjustment
4.3.1 Alarm Level Adjustment for Gas Leak Sensor
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.
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