455 Maintenance5.1.12 Simple Function Test of the CO/H2 ElectrodeWARNING!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 gloves1. Dismantle the probe2. 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!NOTICEAn 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(COe value) respective to the probe dynamic response.5.1.13 Wear-and-Tear Parts of the KS1D Combination ProbeAverage life cycle = 2 - 3 years (depending on fuel).Recommendation:Exchange the ZrO2 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 isavailable. Order no. 656R2065.
