Detcon DM-700 - Manual (Page 34)

Model DM-700
DM-700 Instruction Manual Rev. 4.0 Page 30 of 48
ITM
Bottom View
Display
Window
Plug in Sensor
Bottom view
Locking
Setscrew
Locking
Setscrew
Place programming
connector towards
back away from
display window
PLUG-IN O
ALIGN AR
WITH LED
ntents on skin
MODEL
DM-700
detcon inc.
H 2 S Sensor
detcon inc.
Figure 15 Sensor Cell and ITM Mating
e) Thread the Splash Guard Adapter onto the ITM to a snug fit and tighten the locking setscrew using the
1/16” Allen wrench. Reinstall the splashguard.
f) Verify the gas type and range of the new sensor by checking in View Program Status. It is recommended
“AutoZero and AutoSpan functions be performed, as per Section 3.4 Calibration Mode, to match the new
intelligent plug-in sensor with the ITM.
5.5 Replacement of ITM
a) Remove the power source from the sensor assembly. Disconnect all sensor wire connections at the J-Box
taking note of the wire connections.
NOTE: It is necessary to remove power to the J-Box while changing the ITM in order to
maintain area classification.
b) Use a wrench and the wrench flats provided at the top section of the ITM and unthread the ITM until it can
be removed.
c) Use a 1/16” Allen wrench to release the locking setscrew that locks the ITM and Splash Guard Adapter
together (One turn will suffice - Do not remove setscrew completely).
d) Remove splashguard. Unthread and remove the Splash Guard Adapter from the ITM.
e) Gently remove the plug-in toxic gas sensor from the old ITM and install it in the new ITM. Orient the plug
in sensor so that it matches with the female connector pins on the new ITM, placing the programming
connector to the back and press the sensor in firmly to make proper connection.
f) Thread the Splash Guard Adapter 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 10).