3.0.2 Microprocessor Control Circuit
The control circuit is microprocessor based and is packaged as a plug-in f ield replaceable module, facilitating easy
replacement and minimum down time. Circuit functions include a basic sensor pre-amplif ier, sensor temperature
control, on-board power supplies, microprocessor, back lit alpha numeric display, fault and calibration status LED
indicators, magnetic programming switches, and a linear 4-20 mA DC output.
3.0.3 Base Connector Board
The base connector board is mounted in the explosion proof enclosure and includes: the mating connector for the
control circuit, reverse input and secondary transient suppression, input f ilter, and lugless terminals for f ield wiring.
3.0.4 Explosion Proof Enclosure
Detcon Model TP-524C Hydrogen Sulfide Sensor
PG.4
detcon inc.
Program Switch #2
FLT
CAL
MicroSafe™ H2S Gas Sensor
HOUSTON, TEXAS
PGM
2
PGM
1
MODEL
TP-524C
CONTRAST
Fault & Cal LEDs
Program Switch #1
Menu Driven Display
Plug-in Microprocessor Control Circuit
Display Contrast Adjust
WHT
BLK
YEL
BLU
mA
VDC Power In
4-20 mA Output
Sensor
Base Connector Board
