O2 Innovations pmn - Manual (Page 24)

TARGET Series ENMET Corporation
21
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.
C AUTION : New TOX1 and TOX2 sensors come with a shorting clip that must be removed for proper operation.
Figure 10: Remove shorting clip
Figure 11: Replacing Sensors
N OTE : 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.
C AUTION : Be sure that all wires and tubing will not be pinched or stressed when sensor end cap is replaced.
If your TARGET instrument 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.
Sensor
Bottom View
2mm, Allen Screws
Sensor End Cap
Sensors
Sensor (PCB)
Circuit Board
Spacers
Bracket
2, #6-32 Screws
Gasket