Detcon TP-624C - Manual (Page 7)

3.4.2 Calibration Mode
Calibration mode allows for sensor span adjustments. Unless otherwise specif ied, span adjustment is performed at
10 ppm H2S in air for the range 0-20 ppm, and 25 ppm H2S in air for the ranges 0-50 ppm and 0-100 ppm.
“AUTO SPAN”
3.4.3 Program Mode
The program mode provides a program status menu (View Program Status) to check operational parameters. It also
allows for the adjustment of alarm set point levels, the calibration gas level setting, the heater voltage level, range, and
linearity correction.
3.4.3.1 View Program Status
The program status scrolls through a menu that displays:
* The gas type, range of detection and software version number. The menu item appears as: “H2S 0-100 V6.1”
* The alarm set point level of alarm 1. The menu item appears as: “ALM1 SET @ ##PPM”
* The alarm f iring direction of alarm 1. The menu item appears as: “ALM1 ASCENDING” or descending.
* The alarm relay latch mode of alarm 1. The menu item appears as: “ALM1 NONLATCHING” or latching.
* The alarm relay energize state of alarm 1. The menu item appears as: “ALM1 DE-ENERGIZED” or energized.
* The alarm set point level of alarm 2. The menu item appears as: “ALM2 SET @ ##PPM”
* The alarm f iring direction of alarm 2. The menu item appears as: “ALM2 ASCENDING” or descending.
* The alarm relay latch mode of alarm 2. The menu item appears as: “ALM2 LATCHING” or nonlatching.
* The alarm relay energize state of alarm 2. The menu item appears as: “ALM2 DE-ENERGIZED” or energized.
* The alarm relay latch mode of the fault alarm. The menu item appears as: “FLT NONLATCHING” or latching.
* The alarm relay energize state of the fault alarm. The menu item appears as: “FLT ENERGIZED” or deenergized.
* The calibration gas level setting. The menu item appears as: “CalLevel @ xxPPM”
* The sensor heater voltage setting. The menu item appears as: “HEATER @ #.##VDC”
* The range of detection setting. The menu item appears as: “RANGE @ 0-###PPM”
* Identif ication of the RS-485 ID number setting. The menu item appears as: “485 ID SET @ ##”
* The estimated remaining sensor life. The menu item appears as: “SENSOR LIFE 100%”
3.4.3.2 Alarm 1 Level Adjustment
The alarm 1 level is adjustable over the range 10 to 90% FS. For hydrogen sulf ide gas sensors, the level is factory set
at 10 ppm. The menu item appears as: “SET ALM1 @ 10PPM”
3.4.3.3 Alarm 2 Level Adjustment
The alarm 2 level is also adjustable over the range 10 to 90% FS. For hydrogen sulf ide gas sensors, the level is facto-
ry set at 20 ppm. The menu item appears as: “SET ALM2 @ 20PPM”
3.4.3.4 Calibration Level Adjustment
The Calibration level is adjustable from 10% to 50% of full scale range. The menu item appears as: “CalLevel @ ##PPM”
3.4.3.5 Set Heater Level Adjustment
The Heater Level is adjustable from 4.40 to 5.40 vdc (normally 5.25). The menu item appears as: “Heater @ #.## vdc”
3.4.3.6 Set Range
The full-scale range is adjustable between 0-20 ppm, 0-50 ppm and 0-100 ppm The item appears as: “Range @ 0-### ppm”
3.4.3.7 Sensor Linearization
The sensor linearization feature is a two point calibration reference used to characterize each sensor for linearity. Two calibra-
tion points are required: The menu item appears as: “Apply XX PPM Gas” & “Apply ## PPM Gas” depending on the
full-scale range selected.
3.5 I
NSTALLATION
Optimum performance of ambient air/gas sensor devices is directly relative to proper location and installation practice.
Detcon Model TP-624C Hydrogen Sulfide Sensor PG.7