Detcon TP-524C User Manual
Page 15
The following procedure is used to view the programming status of the sensor:
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 Cal Level, Set Heater Volts, Set Range, and Linearize
Sensor.
b)
Next, scroll to the
“VIEW PROG STATUS”
listing and then hold the programming magnet over “PGM 1”
for 3 seconds. The menu will then automatically scroll, at f ive second intervals, through the following informa-
tion before returning back to the
“VIEW PROG STATUS”
listing.
1 - The gas type, range of detection and software version number. The menu item appears as:
“H2S 0-100 V2.14H”
2 - Calibration gas level setting. The menu item appears as:
“CalLevel @ xxPPM”
3 - The sensor heater voltage setting. The menu item appears as:
“HEATER @ #.##VDC”
4 - The range of detection setting. The menu item appears as:
“RANGE @ 0-###PPM”
5 - The estimated remaining sensor life. The menu item appears as:
“SENSOR LIFE 100%”
6 - The current raw resistance from the sensor. The item appears as:
“RESISTANCE XXXXX”
(in ohms)
c)
Exit back to normal operations by holding the programming magnet over “PGM 2” for 3 seconds, or automati-
cally return to normal operation in 30 seconds.
3.9 P
ROGRAM
F
EATURES
Detcon MicroSafe™ H2S gas sensors incorporate a comprehensive program to accommodate easy operator inter-
face and Fail-Safe operation. Program features are detailed in this section. Each sensor is factory tested, pro-
grammed, and calibrated prior to shipment.
Over Range
When the sensor detects gas greater than its full scale range (20, 50, or 100 ppm), it will cause the display to f lash
“20/50/100 PPM H2S”
on and off. The 4-20 mA signal will report a 20 mA output.
Zero Fault
If the sensor does not clear to <10% of range in <5 minutes after completing a span calibration, the sensor will
enter into a calibration fault mode which will cause the display to alternate between
“ZERO FAULT”
and the sen-
sors current reading. The Fault LED will light and the 4-20 mA signal will report 0 mA until the Fault is cleared by
performing a successful span calibration.
Stability Fault
If the sensor does not stabilize within 5 minutes during AutoSpan, the sensor will enter into “STABILITY FAULT”,
and alternate between “Stability Fault” and sensor’s current reading. The Fault LED will light and the 4-20 mA sig-
nal will report 0 mA until the Fault is cleared by performing a successful span calibration.
Range Fault
If the sensor fails the minimum signal change criteria, then a
“RANGE FAULT”
message will be displayed alter-
nately with the sensor’s current reading. The Fault LED will light and the 4-20 mA signal will report 0 mA until the
Fault is cleared by performing a successful span calibration.
Sensor Fault
If the sensor film should fail and become electrically open, the display will indicate:
“SENSOR FAULT”.
Open Heater Fault
If the sensor heater should fail and become electrically open, the display will indicate:
“HEATER FAULT”.
Detcon Model TP-524C Hydrogen Sulfide Sensor
PG.15