Hitachi CHROMASTER 5160 Instruction Manual page 687

4.1 How to Check the Specifications and Performance
4.1.3 Operational Check of Gas Leak Sensor
The Chromaster 5310 column oven is equipped with a gas leak
sensor for detecting an organic solvent gas on occurrence of
liquid leakage. Note, however, that liquid leakage may not be
detected correctly due to variations in environmental conditions
or sensitivity of the leak sensor. To prevent this, perform
periodic operation check for the gas leak sensor as instructed
below.
Set the oven temperature to 40 °C.
(1)
After the temperature stabilizes at 40 °C, aspirate 50 μL of
(2)
methanol with the micro-syringe, and inject the methanol
into the oven through the piping connection opening.
Specification: A gas leak error should be indicated properly.
NOTE: 1. Even if the sensor output exceeds the threshold, a
gas leak error will not appear on the gas leak sensor
monitor screen.
2. Since the sensor output is unstable for about five
minutes after turning ON the power switch, gas leak
detection is not performed during this time. For the
operational check of the sensor, therefore, wait at
least five minutes after turning ON the power.
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