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SERIES 3000 MKIII TECHNICAL MANUAL
15. Servicing
• Take care when handling sensors as they may contain corrosive solutions.
• Do not tamper or in any way disassemble the sensor. Do not expose to temperatures outside the
recommended range. Do not expose sensor to organic solvents or flammable liquids.
• At the end of their working life, sensors must be disposed of in an environmentally safe manner. Disposal
should be according to local waste management requirements and environmental legislation.
• Alternatively, sensors may be securely packaged and returned to Honeywell Analytics clearly marked for
environmental disposal. Sensors should NOT be incinerated as they may emit toxic fumes.
Caution:
The following procedure should be followed carefully and only performed by
suitably trained personnel. A fault condition will be signalled by the detector if the sensor
is removed with the unit under power.
15.1 Sensor replacement
Caution:
For biased sensors (e.g. Nitric Oxide and Ethylene Oxide) remove the sensor
stabilizer from the bottom of the sensor prior to installation.
Using diagram 13 as a guide, follow the procedure below:
1. Check that the label on the new sensor is the correct gas type.
2. Enter the change sensor menu (see section 12).
3. Unscrew the weatherproof cover, loosen the retainer locking screw and unscrew the sensor retainer.
4. Remove the old sensor by pulling without twisting.
5. Plug in the new sensor taking care to align the sensor pins with the connector.
6. Refit the sensor retainer, tighten the locking screw and refit the weatherproof cover.
7. Countdown time of up to 180 seconds (dependant on sensor type) is displayed.
8. Re-calibrate the detector following the procedures in section 8.2.
WARNINGS
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MAN0917_Issue 6_08/2015
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