O2 Innovations pmn manual Replacing Sensors, Remove shorting clip

TARGET Series ENMET Corporation

6.7 Replacing Sensors

When sensors can no longer be calibrated, they must be replaced. Replacing them is accomplished by removing the two screws holding the sensor end-cap of the instrument housing. A 2 mm allen key is required. Two #6-32 screws hold a bracket over the sensor board. Remove the screws and bracket. Remove the 2 spacers beneath the bracket to remove the sensor circuit board. Replace sensors as necessary and re-assemble. See figures 10 and 11.

CAUTION: New TOX1 and TOX2 sensors come with a shorting clip that must be removed for proper operation.

Sensor

Bottom View

Figure 10: Remove shorting clip

Sensor End Cap

2mm, Allen Screws

Gasket

Sensors

Sensor (PCB)

Circuit Board

Spacers

Bracket

2, #6-32 Screws

Figure 11: Replacing Sensors

NOTE: Be sure to properly install the gasket when re-assembling the instrument. The best technique is to thread the screws most of the way in. Install the gasket, then tighten the screws.

CAUTION: Be sure that all wires and tubing will not be pinched or stressed when sensor end cap is replaced.

If your TARGETinstrument was ordered with less than five sensors installed, one or more sensor inserts have been installed. These inserts are not operational and are installed to provide environmental and structure integrity of the sensor housing. If activating any of these is desired, contact ENMET or your local distributor for upgrade information.

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