Detcon TP-624C - Manual (Page 14)

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.
A magnetic programming tool (see f igure 6) is used to operate the switches. Switch action is def ined as momentary
contact, 3 second hold, and 15 second hold. In momentary contact use, the programming magnet is waved over a
switch location. In 3 second hold, the programming magnet is held in place over a switch location for 3 or more
seconds. In 15 second hold, the programming magnet is held in place over a switch location for 15 or more sec-
onds. Three and f ifteen second hold is used to enter or exit calibration and program menus while momentary con-
tact is used to make adjustments. The location of “PGM 1” and “PGM 2” are shown in f igure 6B.
NOTE: If, after entering the calibration or program menus, there is no interaction with the menu items for more
than 30 seconds, the sensor will return to its normal operating condition.
3.6.4 Setting Range
Detcon Model TP-624C can be programmed to operate in one of three ranges of detection: 0-20 ppm, 0-50 ppm, or
0-100 ppm. To determine the current range setting follow the instructions given in section 3.8.
To change the range of detection follow the instructions below:
a) First, enter the programming menu by holding the programming magnet stationary over “PGM 2” for 15 sec-
onds until the display reads “VIEW PROG STATUS” , then withdraw the magnet. At this point you can
scroll through the programming menu by momentarily waving the programming magnet over “PGM 1” or
“PGM 2”. The menu options are: View Program Status, Set Alarm 1, Set Alarm 2, Set Cal Level, Set Heater Volts,
Set Range, and Linearize Sensor.
b) Next, scroll to the “SET RANGE” listing and then hold the programming magnet over “PGM 1” for 3 sec-
onds. The menu appears as “Range @ 0-### ppm” listing.
c) Use the programming magnet to make an adjustment to “PGM 1” to increase or “PGM 2” to decrease the read-
ing to the desired range.
d) 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.
e) 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.
Detcon Model TP-624C Hydrogen Sulfide Sensor PG.14
Magnetic Programming Tool
Figure #6
detcon inc.
Program Switch #2
FLT
ALM
1 CAL
MicroSafe™ H2S Gas Sensor
HOUSTON, TEXAS
PGM 2
PGM 1
ALM
2
MODEL TP-624C
CONTRAST
Alarm & Cal LEDs
Program Switch #1
Menu Driven Display
Display Contrast Adjust
Plug-in Microprocessor Control Circuit
Figure #6B