Table of Contents
Notice and limited Warranty 3
Service Policy 4
Specifications 6
Overview 7
Target gases and Detection Ranges 8
Transmitter Board assembly 9
Connection Board assembly 10
Wiring Diagram
DC Power and 4-20mA Signal Output 11
Low and High Alarms 12
Installation 13
Start Up 15
Normal Operation 16
Gas Reading Display 16
Signal Output 4-20mA 16
Alarm Conditions 17
Low & High Alarm, Fault 17
Resetting Alarms 18
Calibration 19
Sensor calibration 19
Recommended Calibration Gases 22
Calibration errors and remedies 25
Calibration Flow Chart 26
Adjust alarm set points 27
Setting Low & High Alarm Levels 27
MAINTENANCE
Factors affecting sensor accuracy 28
Routine maintenance 28
Sensor Inspection 28
Sensor Sensitivity 28
Sensor Replacement 29
Spare Parts 30
Part Numbers for transmitter boards 30
And sensor head assembly
Part Numbers for recommended calibration gases 31
PT295 Series Toxic Sensor Rev 5.1
2
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