TIGER Select Instrument User Manual V3.2
Unrivalled Gas Detect
ion.
Page 66 of 73
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Replacing the MiniPID Electrode Stack
At this point the MiniPID Electrode Stack can be replaced.
1
Electrode Stack
2
O-ring
3
Lamp
4
Spring
5
Sensor Body
Discard the removed (old) Electrode Stack, carefully removing the Lamp if still attached.
Visually check the condition of the Lamp detection window (the upper flat surface of the Lamp). If
this needs cleaning proceed as detailed later.
Place the Electrode Stack onto a clean, flat surface, flat surface downwards. Carefully twist the
detection window end of the Lamp into the O-ring around the well in the underside of the Electrode
Stack. The Lamp window should now sit flush within the Electrode Stack.
This procedure ensures that the Lamp is firmly held in the Electrode Stack with
the detection window level with the electrodes for consistent and reliable VOC
readings. Lamp placement by any other means is likely to give unreliable readings
because the O-ring in the Electrode Stack becomes trapped between the window
face and the Electrode Stack.
Carefully align the MiniPID 2 Sensor body over the Electrode Stack plus Lamp. Push the sensor body
down to secure the assembly - two clicks should be heard.
Carefully align/push the new MiniPID 2 Sensor into the Instrument Body.
Then ensuring, the PTFE Filter Disc and O-ring are correctly positioned, screw the Sensor Cover back
onto the Instrument Body. Do not over-tighten.
The instrument MUST now be re-calibrated.
