SICK GM700 Ex, Руководство по эксплуатации, Страница: 78 / 102

DANGER
Risk of explosion through residual voltages and hot surfaces in the device
When the device is switched off, residual voltages and hot surfaces represent an
increased risk of explosion when the device is open.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
The evaluation unit must be checked regularly depending on ambient conditions:
• Visual check of surfaces:
–
Enclosure and fastening
– Opening and closing the front door
– Clean the inspection window
– Check for moisture outside and inside the enclosure
• Electrical check:
–
LED
– Tight seat of line connections
Damage on the evaluation unit (e.g., LC display failure):
w
Contact SICK Service.
9.11 Cleaning the purge air unit
Materials required Part number
Air filter 5328662
CAUTION
Contaminated purge air supply can damage the measuring system
Inadequate cleaning of the purge air supply can cause blocking of tubes or filters. The
measuring system can no longer be protected from contaminated sample gas.
b
Regularly check and clean the purge air supply.
NOTE
Further information on maintenance and cleaning can be found in the Data Sheet of
the purge air unit.
NOTE
The filter of the purge air unit must be replaced at the latest when the low-pressure
sensor on the filter outlet triggers.
Preparation
• For prolonged maintenance work on the purge air supply: Remove the SR-unit and
reflector unit from the gas duct
• For short maintenance work on the purge air supply: Swivel SR-unit and reflector
unit from the gas duct
Cleaning the purge air unit
1. Put the purge air unit out of operation and completely remove the purge air hoses.
2. Replace the air filter in the purge air unit and clean the inside of the purge air
unit..
3. Completely swivel open the SR-unit and the reflector so that dust that was possibly
blown through the purge air hose is not deposited on the windows.
4. Put the purge air unit back into operation. .
9
MAINTENANCE
78 O P E R A T I N G I N S T R U C T I O N S | GM700 Ex 8019532/100Q/V1-1/2018-08 | SICK
Subject to change without notice