Operating instructions

24 OXOR-E · Supplementary Operating Instructions · 8013035 V2.0 · © SICK AG
Maintenance
Subject to change without notice
5.1 Information on shutting down
5.2 Service life of the oxygen sensor
Limited service life
● The electrochemical reaction slowly uses up the electrolyte in the oxygen sensor. The
oxygen sensor must therefore be renewed in certain intervals.
● Unfavorable sample gas compositions can shorten the normal service life. Example:
Aerosols, high SO
2
concentrations.
Recommended maintenance interval
▸ As preventative measure, renew the oxygen sensor after about two years operating time
(→ p. 25, §5.4).
Criteria for the end of the service life
● Reaction time of the O
2
measurement slowly increases.
● Reference point drift for O
2
increases quickly, i.e. O
2
sensitivity decreases rapidly.
5.3 Spare parts
The electrochemical cell is used up when in contact with air even when it is not
in operation.
▸ When the gas analyzer is shutdown or stored (recommendation): Close off
the sample gas path of the gas analyzer gas-tight to prevent contact with
ambient air.
Drift is checked automatically during adjustments (→ p. 20, §3.4.4).
Part No. Description Comprises
2054673 Spare parts set, oxygen sensor ● Oxygen sensor (with sealing ring)
(→ Fig. 4)
● Locking varnish
[1]
[1] For fixing screw
2048615 Spare part set, OXOR-E ● Oxygen sensor
● Holder (base) for oxygen sensor
● PVDF screw-in joint for hose 6/4 mm
● PVDF screw plug G1/8"
● Fixing screw
● Locking varnish
[1]
▸ Whenever possible, store the oxygen sensor upright in a cool location (see
marking “UP” → Fig. 4).
▸ Store the oxygen sensor packed airtight or keep the opening in the connec-
tion gas-tight (as delivered).
▸ Maintain the allowable storage temperature: –20 … +60 °C.
Longer storage periods shorten the oxygen sensor service life.
▸ Do not store the oxygen sensor as spare part for longer periods.