MAINTENANCE & TROUBLESHOOTING
5-
3
5.2. Troubleshooting
Tips
Problem
Possible Cause
Possible Solution
Cannot turn on
power after
charging
battery
Defective battery.
Microcomputer
hang-up.
Charge or replace battery.
Disconnect then connect
battery to reset computer.
No LED or LCD
backlight
Wrong mode setting.
Defective LED or
LCD backlight.
Check and see if the
backlight is in automatic or
manual mode.
Call service center.
Lost password
Forgot.
Use ProRAE Suite to reset
the password.
Buzzer
inoperative
Bad buzzer
Call authorized service
center.
Calibration
error message
No standard gas
input
Low sensitivity to cal
gas
Check standard gas flow
path or cylinder pressure
Change cal gas or sensor
“Voltage too
high” message
Battery fuse blown
or wrong AC adapter
Check battery and adapter.
“Bat”message
Battery Low
Recharge battery.
High pump
noise or no
inlet suction
Leaky inlet path
Defective pump
Check inlet connection.
Replace pump.
Abnormally low
reading
Incorrect calibration
or calibration error
Make sure the span gas
value matches the
calibration gas, then re-
calibrate.
Reading
jumping around
Incorrect gas
calibration Low
sensitivity to cal gas
Calibrate the sensor.
Use different cal gas.
Change sensor.
Cannot turn off
monitor or
corrupted
characters
Microprocessor
hang-up
Disconnect and re-connect
battery to reset computer.
Reload the firmware.
Read a small
background
value
There is actually a
small background
gas level
Sensor zero drift
Do fresh air calibration
