Detcon TP-524C - Manual (Page 11)

3.6.2 Remote Mount Heater Voltage Setup
If the sensor has been installed using the remote mounting conf iguration as described in section 3.5.6, the sensor
heater voltage must be adjusted after initial power up. Replacement of the sensor will also require readjusting the
heater voltage. Follow the steps below to set the sensor heater voltage.
Material Requirements
* Detcon PN 3270 MicroSafe™ Programming Magnet
* Digital volt/ohm meter.
Note: Refer to section 3.6.3 for programming magnet operating instructions.
a) Declassify the area around the sensor.
b) Remove the junction box cover from the remote sensor enclosure (see f igure 4).
c) Using the digital volt/ohm meter, measure the bridge voltage at the remote sensor connector board from the
“White” terminal to the “Black” terminal as shown in figure 4. Target voltage is 5.25 volts.
d) At the transmitter, enter the programming menu by holding the programming magnet stationary over “PGM 2”
for 15 seconds until the display reads “VIEW PROG STATUS” , then withdraw the magnet.
e) Next, scroll to the “SET HEATER VOLTS” listing and then hold the programming magnet over “PGM 1”
for 3 seconds. The menu item appears as “HEATER @ #.## VDC”.
f) Use the programming magnet to make an adjustment to “PGM 1” to increase or “PGM 2” to decrease the volt-
age. Set this voltage so that the voltage measured at the remote sensor connector board is 5.25 VDC. This is the
correct voltage for an ambient temperature of 25°C at the remote sensor connector board. If ambient tempera-
ture is not 25°C reference the table in section 3.6.5 for the proper voltage setting.
g) Exit to the programming menu by holding the programming magnet over “PGM1” for 3 seconds, or automati-
cally return to the programming menu in 30 seconds.
h) Exit back to normal operation by holding the programming magnet over “PGM 2” for 3 seconds, or automati-
cally return to normal operation in 30 seconds.
i) Replace the junction box cover on the remote sensor enclosure.
Heater voltage adjustment is complete.
3.6.3 Programming Magnet Operating Instructions
Operator interface to MicroSafe™ gas detection products is via magnetic switches located behind the transmitter
face plate. DO NOT remove the glass lens cover to calibrate or change programming parameters. Two switches
labeled “PGM 1” and “PGM 2” allow for complete calibration and programming without removing the enclosure
cover, thereby eliminating the need for area de-classif ication or the use of hot permits.
Detcon Model TP-524C Hydrogen Sulfide Sensor PG.11
Figure #5
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
Figure #6