Contamination through gas residues
WARNING
Risk of chemical burns/poisoning through caustic/toxic residues on components with
sample gas contact
After the device has been decommissioned or removed from the measuring channel,
process gas residues can exist as deposits on components with sample gas contact
(e.g., gas filter, gas-carrying lines etc.). These residues can be odorless or invisible
depending on the gas mixture in the duct. Without protective clothing, contact with such
contaminated components can lead to severe burns or poisoning.
b
Take appropriate protective measures for work (e.g., by wearing a safety mask, pro‐
tective gloves and acid resistant clothes).
b
In case of contact with skin or the eyes, rinse immediately with clear water and
consult a doctor.
b
Decontaminate all contaminated components according to regulations after disas‐
sembly.
WARNING
Risk of injury through uncontrolled escape of process gas when the gas duct is
opened when under overpressure
Swiveling the SR-unit or reflector unit (on Cross-Duct version) open can lead to contact
with toxic and/or hot gases with overpressure in the duct.
b
All persons at the gas duct during opening of the device must follow the protective
measures mandatory in operation. Pay special attention to protective masks and
protective gloves.
b
Prepare a suitable cover for the opening in the device flange of the SR-unit and
reflector (for Cross-Duct version) and have it available.
b
Attach the cover to the device flange opening immediately after swiveling the SR-
unit open (reflector unit, for Cross-Duct version).
9.2
Maintenance plan
Table 16: Maintenance intervals
Interval
1
Maintenance work
Reference
1W
Check that measured values in the control
area are plausible
see "Call up diagnostic data", page 65
1M
Visual inspection of system
see "Visual check of the sender/receiver
unit and evaluation unit", page 72
Clean window.
see "Cleaning the optical interfaces",
Check optical alignment
see "Optical fine alignment of the sender/
receiver unit ", page 54
Check ambient temperature range
see "System: GM700 Ex version 3G / zone
2", page 90
Check purge air unit.
See Operating Instructions of purge air unit
6M
Check the pressurized enclosure system.
see "Function test of the pressurized enclo‐
sure system", page 70
Protective gas: Condition, availability, pres‐
sures.
see "Feeding protective gas", page 52
1
1W = Weekly, 1M = Monthly, 3M = Every 3 months, 6M = Every 6 months, Y = Yearly
MAINTENANCE
9
8019532/100Q/V1-1/2018-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM700 Ex
69
Subject to change without notice