Carbon Monoxide Alarm User Manual
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3.1 Functional (bump) test 17
3.2 Effect of contaminants on PhD
2
sensors 17
3.2.1 Effects of contaminants on oxygen sensors 17
3.2.2 Effects of contaminants on combustible sensors 17
3.2.3 Effects of contaminants on toxic gas sensors 18
3.3 Fresh air "zero" calibration 18
3.3.1.1 Fresh air "zero" through MODE button 18
3.3.1.2 Fresh air "zero" through mini-push-buttons 19
3.4 PhD
2
span calibration 19
3.4.1 Calibration procedures for sulfur dioxide, ammonia, chlorine, hydrogen cyanide, and
hydrogen chloride “corrosive gas” sensors. 20
3.4.1.1 Corrosive gas sensor functional (bump) test 20
3.4.1.2 Corrosive gas sensor span adjust procedures 21
Chapter 4 Setting alarm levels -------------------------------------------------------------------------22
4.1 Alarm adjustment sequence 22
4.2 Restoring the factory default alarm settings 22
Chapter 5 PhD2 Advanced Functions ---------------------------------------------------------------24
5.1 PhD
2
Advanced features overview 24
5.2 Diagnostics Test 24
5.2.1 Entering the Diagnostics Test mode 24
5.2.2 Diagnostic counts 24
5.2.2.1 Optimal diagnostic count ranges for version 4.7 PhD
2
detectors 25
5.2.3 Exiting the Diagnostics Test mode 25
5.3 Sensor Configuration mode 25
5.3.1 Entering the Sensor Configuration mode 25
5.3.2 Enabling and disabling the oxygen and combustible gas (LEL) channels 25
5.3.3 Configuring toxic gas channels 26
5.3.3.1 Resetting the toxic sensor bias voltage 26
5.3.4 Changing the precision of the toxic sensor read-out 27
5.3.5 Adding an instrument identification number 27
5.3.6 Text Only operating mode readout latch 28
5.3.7 "Alarm latch" command 28
5.3.8 Security beep 28
5.3.9 Exiting the Sensor Configuration mode 28
Chapter 6 Record Keeping ------------------------------------------------------------------------------29
6.1 PhD
2
datalogging overview 29
6.1.1 Optional Datalink and Gas Detection Database Software kit 29
6.2 Adjusting record keeping parameters 29
6.2.1 Entering the Datalogging Adjust mode 29
6.2.2 Adjusting the sampling interval 29
6.2.3 Baud rate 30
6.2.4 Setting the date and time 30