Detcon TP-524C - Manual (Page 9)

Maintenance Access
Consideration should be given to easy access by maintenance personnel as well as the consequences of close prox-
imity to contaminants that may foul the sensor prematurely.
Note: In all installations, the sensor element in SS housing points down relative to grade (Fig. 1). Improper sensor
orientation may result in false reading and permanent sensor damage.
3.5.3 Local Electrical Codes
Sensor and transmitter assemblies should be installed in accordance with all local electrical codes. Use appropriate
conduit seals. Drains & breathers are recommended. The sensor assemblies are CSA-NRTL approved for Class I;
Groups B, C, D; Div. 1 environments.
Note: An appropriate conduit seal must be located within 18" of the sensor assembly. Crouse Hinds type EYS2,
EYD2 or equivalent are suitable for this purpose.
3.5.5 Installation Procedure
a) Remove the junction box cover and un-plug the control circuit by grasping the two thumb screws and pulling outward.
b) Securely mount the sensor junction box in accordance with recommended practice and proper orientation (see fig. 1 & 2).
c) Observing correct polarity, terminate 3 conductor field wiring to the sensor base connector board in accordance
with the detail shown in Figure 3.
d) Replace the plug-in transmitter circuit and replace the junction box cover.
3.5.6 Remote Mounting Applications
Some sensor mounting applications require that the gas sensor head be remotely mounted away from the sensor
transmitter. This is usually true in instances where the gas sensor head must be mounted in a location that is diff i-
Detcon Model TP-524C Hydrogen Sulfide Sensor PG.9
1 2 3 4
W
H
T
B
L
K
Y
E
L
B
LU
Remote Transmitter
TP-524C-RT
Remote Sensor
TP-524C-RS
WHT
BLK
YEL
BLU
Plug unused port
with 3/4 NPT plug.
Measure Heater V oltage
From White (1) to Black (2)
Target voltage is 5.25v
± .05 v
Figure #4
WHT
BLK
YEL
BLU
mA
VDC Power In
4-20 mA Output
Sensor
Base Connector Board
Figure #3