Detcon FP-700 - Manual (Page 34)

Model FP-700
FP-700 Instruction Manual Rev. 3.0 Page 30 of 40
e) Thread the Bottom Housing onto the ITM to a snug fit and tighten the locking setscrew using the M1.5
Allen wrench. Reinstall the splashguard.
f) With the new plug-in sensor physically installed, two menu functions are required to be performed. 1) The
Set Bridge Voltage function must be performed to match the new sensor with the ITM (Section 3.5.6). 2)
Perform a successful AutoZero and AutoSpan to match the new sensor with the ITM (Section 3.4).
5.5 Replacement of ITM
a) Disconnect all sensor wire connections at the J-Box after removing power source.
NOTE: It is necessary to remove power to the J-Box while changing the ITM in order to
maintain area classification.
b) Use wrench and the wrench flats provided at the top section of the ITM and unthread until it can be
removed.
c) Use a M1.5 Allen wrench to release the locking setscrew that locks the ITM and bottom housing together
(One turn will suffice - Do not remove setscrew completely).
c) Remove splashguard. Unthread and remove the Bottom Housing from the ITM.
e) Gently pull the plug-in combustible gas sensor out of the ITM and set it aside along with the bottom housing
and splashguard. Orient the plug in sensor so that it matches with the female connector pins on the new ITM
and press the sensor in firmly to make proper connection.
f) Thread the bottom housing onto the ITM until snug, tighten the locking setscrew and reconnect splashguard.
g) 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 lens faces toward the front access point. Connect the sensor assembly wires
inside J-Box (Refer to Section 2.6, and Figure 11).
g) Perform the following menu functions to adapt to the new ITM: Set Bridge Voltage (Section 3.5.6), Set
Serial ID (Section 3.5.6), Set AutoSpan Level (Section 3.5.3), and perform a successful AutoZero and
AutoSpan calibration to match the sensor with the ITM (Section 3.4).
5.6 Replacement of FP-700 Sensor Assembly
a) Disconnect all sensor wire connections at the J-Box, after removing power source.
NOTE: It is necessary to remove power to the J-Box while changing the FP-700 sensor in
order to maintain area classification.
b) Use wrench and the wrench flats provided at the top section of the sensor and unthread until it can be
removed.
c) Feed the new FP-700 sensor assembly wires through the ¾” female NPT mounting hole and thread the
assembly into the J-box until tight and the ITM lens faces toward the front access point. Connect the sensor
assembly wires inside J-Box (Refer to Section 2.6, and Figure 11).
d) FP-700 sensors are factory calibrated. However, they will require an initial AutoZero and AutoSpan
(Section 3.4). They must also be configured per customer specific application requirements.