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5 Maintenance
5.1.12 Simple Function Test of the CO/H
2
Electrode
WARNING!
Danger of burns!
Probe becomes hot during operation.
If the probe is operated when removed, there is a danger of burns on the probe housing.
Never lay the probe on flammable material and heat it up.
Wear protective gloves
1. Dismantle the probe
2. Fill isopropyl alcohol in a glass (approx. 1 cm)
Alternatively, use brandy/perfume / etc.
3. Hold the probe without the GED upside down into the glass.
Do not immerse!
NOTICE
An additional possibility is to purge the probe with test gas containing CO, NO, H
2
, etc.
Some ppm are enough.
If the probe is OK, this immediately reacts with a considerable increase in the probe voltage
(CO
e
value) respective to the probe dynamic response.
5.1.13 Wear-and-Tear Parts of the KS1D Combination Probe
Average life cycle = 2 - 3 years (depending on fuel).
Recommendation:
Exchange the ZrO
2
measuring cell after 5 years at the latest.
A worn measuring gauge could cause errors while calibrating and therefore impede the pre-
cision of measurement.
The Combination Probe KS1D type 656R2000 with housing and type 656R2010 without hous-
ing can only be replaced completely
.For Combination Probe KS1D HT (high temperature) type 656R2015, a replacement kit is
available. Order no. 656R2065.
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