21
8027092/AE00/V1-0/2022-10| SICK
O P E R A T I N G I N S T R U C T I O N S | VISIC100SF
Subject to change without notice
ADJUSTMENT
7
7
Adjustment
An electrochemical process always leads to a loss of sensitivity over time. Therefore, an
adjustment of the zero point and the sensitivity is necessary at regular intervals.
7.1
Safety
7.2
Materials and tools required
●
Gas Adjustment Kit
●
VISIC100SF with gas sensors
●
Test gas cylinder with synthetic air (21% O
2
, 79% N
2
) for zero point adjustment
●
Test gas cylinder with test gas:
– For CO/NO in the range 30-90% of the measuring range for sensitivity adjustment
– For NO
2
: 30% measuring range end value up to 6 ppm
●
Test gas CO /NO/NO
2
●
Allen key, SW4
●
Special pliers/universal tool for cable glands
WARNING: Hazard by voltage.
Live parts are accessible when the device is open!
▸
Only use suitable, insulated tools.
WARNING: Hazard by corrosive liquids
If the gas sensor is mechanically damaged, corrosive liquid may escape and cause
serious injury.
▸
Take appropriate protective measures for work (e.g., by wearing a safety mask,
protective gloves and acid resistant clothes).
▸
In case of contact with the skin or eyes, rinse the affected parts immediately with
clear water and consult a doctor.
▸
Dispose of damaged gas sensors immediately.
WARNING: Health hazard due to defective gas cylinders
The use of defective test gas cylinders for adjusting the electrochemical cells can lead to
accidents and health hazards.
▸
Do not use expired test gas cylinders.
▸
When handling pressure vessels, observe the required safety regulations.
WARNING: Hazard through escaping calibration gases
Incorrect handling of calibration gases can cause high concentrations above the
occupational exposure limits to escape from the gas sensor into the ambient air and
lead to poisoning.
▸
Observe the Safety Datasheets of the calibration gases.
▸
Ensure adequate ventilation.
▸
Limit gassing time.
