Detcon FP-100 - Manual (Page 23)

Model FP-100
FP-100 Instruction Manual Rev. 0.0 Page 19 of 30
2. Remove the power source to the sensor assembly. Disconnect all sensor wire connections at the
Junction Box Terminal Board taking note of the wire connections.
NOTE: Connections on the Display Terminal Board are clamp type, and require a small
screwdriver or insertion tool to actuate the clamp that holds the wire.
NOTE: It is necessary to remove power to the Junction box while changing the ITM in order
to maintain area classification.
3. Use a wrench and the wrench flats provided at the top section of the ITM and unthread the ITM until it
can be removed.
4. Use a 1/8” Allen wrench to release the locking cap head screw that locks the ITM and Bottom
Housing together (One turn will suffice - Do not remove cap head screw completely).
5. Unthread and remove the Bottom Housing and Splash Guard from the ITM. These will be re-used
with the new ITM.
6. Gently remove the plug-in sensor from the old ITM and install it in the new ITM. Orient the plug-in
sensor so that it matches the female connector pins on the new ITM and press the sensor in firmly to
make proper connection.
7. Thread the Bottom Housing onto the new ITM until snug, tighten the locking cap head screw and
reinstall Splash Guard.
8. Feed the sensor assembly wires through the ¾” female NPT mounting hole and thread the assembly
into the J-box until tight and the ITM faces toward the front access point. Use the locking nut to
secure the ITM in this position. Connect the sensor assembly wires to the terminal board inside the
Junction Box (Refer to Section 2.6).
9. Check and/or perform Zero Calibration and Span Calibration per sections 3.2 Calibration.
4.3 Replacement of the Model 100 Terminal Board
There are two terminal boards used with the 100 series sensors. Although the boards are physically different
the procedure is basically the same. These terminal boards are not interchangeable, and the terminal board
being replaced should be replaced with the same type of terminal board.
1. Remove the power source to the sensor assembly.
NOTE: It is necessary to remove power to the Junction Box while changing the Model 100
Terminal Board in order to maintain area classification.
2. Remove the junction box cover and remove the 100 Series Display, if one is installed. (The 100 series
display unplugs from the Model 100 Display Terminal Board
3. Remove the power connector from the terminal board.
4. Unplug all other connectors from the terminal board, noting where they are plugged in.
5. Remove the four 6-32 screws holding the terminal board to the base of the junction box and remove
the terminal board.