Thermo Scientific FOCUS GC, Instruction Manual

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About This Manual Cleaning and Decontamination
xxiv Instruction Manual
Using the Hydrogen Sensor
The lower limit of the hydrogen sensor is 0.5% in volume. You should adjust the
detection threshold to 1% in volume, which is 25% of the hydrogen lower limit of
explosion (4% in volume). In cases where the connections begin to leak or the
column breaks, the sensor alerts the operator. Then it automatically cuts off the
gas supply and heating to the active zones, and sweeps the column oven with
forced air ventilation. If the sensor detects anomalies or leaks during GC
operation due to instrument malfunction, the operator must immediately:
• close the hydrogen supply
• switch off the gas chromatograph
• air out the room
The reliability of the sensor depends on careful maintenance. After the sensor is in
use, you must periodically check its operating performance and calibration as
recommended by the manufacturer. Refer to your hydrogen sensor’s instruction
manual for maintenance guidelines.
WARNING! Never use hydrogen in FOCUS GC unless your GC oven has a hydrogen sensor
installed.
Thermo Fisher Scientific CSEs are not authorized to install or repair any instrument
using hydrogen as a carrier gas unless the instrument is equipped with the appro-
priate sensor.
Cleaning and Decontamination
Normal usage of the FOCUS GC can cause the exterior to get dirty. Clean the
outer surfaces by wiping them with a cloth dampened with water.
In the event that a hazardous material is spilled on or in the instrument, clean the
spill according to the procedures in the Material Safety Data Sheet for that
substance.