TROUBLESHOOTING
7-2
7.1 Diagnostic Mode
To place the monitor into the special diagnostic mode, first turn
the monitor off. Next simultaneously push and hold [Y/+] and
[MODE] for at least two seconds. After the required delay,
release both keys and the monitor will go through the normal
start-up display sequence and display a “Diagnostic mode”
message. For fast start-up in diagnostic mode, press [Y/+]
once when “Diagnostic Mode” is shown. At the end of the
special mode start-up, the display will show 1 to 5 numbers
with a message “Raw.” These numbers are raw sensor
readings without calibration.
Other critical parameters of the monitor are available as shown
in Table 7.1. They can be reached by pressing the [MODE]
repeatedly until the desired parameters are displayed.
Table 7.1
Critical Parameters
Key Action
Display
Raw Readings
[MODE]
PID Sensor Raw Counts
[MODE]
PID Lamp Parameters
[MODE]
CO
2
Raw Counts and Bias
[MODE]
Toxic Gas Sensor and Raw Counts
[MODE]
Adjust LCD Contrast
[MODE]
Adjust Pump Stall Threshold
[MODE]
Clock and Battery Voltage
[MODE]
Battery Duration Time
[MODE]
Communicate with PC?
