Detcon PI-600 - Manual (Page 20)

3.6.2 Calibration Mode
Calibration mode allows for sensor zero and span adjustments. “1-ZERO 2-SPAN”
3.6.2.1 Zero Adjustment
Zero is set in ambient air with no target gas present or with zero gas applied to the sensor. “AUTO ZERO”
3.6.2.2 Span Adjustment
Span adjustment is performed with a target gas concentration of 50% of range in air. Span gas concentrations other than
50% of range may be used. Refer to section 3.6.3.2 for details. “AUTO SPAN”
3.6.3 Program Mode
The program mode provides a program status menu (View Program Status) to check operational parameters. It also
allows for the adjustment of the calibration gas level setting.
3.6.3.1 Program Status
The program status scrolls through a menu that displays:
* The software version number.
* Range is ###
* 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”
* Identif ication of the RS-485 ID number setting. The menu item appears as: “485 ID SET @ ##”
* The response factor setting. The item appears as: “RespFactor = x.xx”
* The current zero offset value. The menu item appears as: “ZeroOffset = x.x PPM”
* The raw signal from the sensor head. The menu item appears as: “Raw Signal = x.xx V”
* The estimated remaining sensor life. The menu item appears as: “SENSOR LIFE 100%”
3.6.3.2 Alarm 1 Level Adjustment
The alarm 1 level is adjustable from 10% to 90% of range. The menu item appears as: “SET ALM1 @ ##PPM”
3.6.3.3 Alarm 2 Level Adjustment
The alarm 2 level is adjustable from 10% to 90% of range. The menu item appears as: “SET ALM2 @ ##PPM”
3.6.3.3 Calibration Level Adjustment
The calibration level is adjustable from 10% to 90% of range. The menu item appears as: “CalLevel @ ##PPM”
3.6.3.4 Response Factor Adjustment
The Response Factor is set according to the primar y target gas being detected. The menu item appears as:
“RespFactor = x.xx”
3.6.3.5 Zero Offset
The Zero Offset is settable between 0 and 10 ppm to account for residual backgrounds of active VOCs in ambient air. The
menu item appears as: “ZeroOffset = x.x PPM”
3.6.3.6 Raw Signal
The raw signal from the sensor head is displayed for the purpose of troubleshooting.
PI-600 Toxic Gas Sensors PG.20