TROUBLESHOOTING
8-3
Troubleshooting Continued
Excessive pump
noise
No inlet air
vacuum
Leaky inlet path
Defective pump
Check inlet
connection
Replace with a
new pump
Radio
Communication
See Section 6.3 or 7.3.
Reading jumps
around randomly
Incorrect gas calibration
Low sensitivity to calibration gas
Cannot turn
monitor off
Corrupted
characters on
LCD
Microprocessor hang-up
Calibration error
message
No standard gas input
“Bat” message in
operation
Uncharged battery
Full-scale
measurement in
humid
environment
Dirty or wet sensor
VOC
measurement
maxes out at
certain level
Dirty PID sensor module
Weak PID lamp
Excessive pump
noise
No inlet air
vacuum
Leaky inlet path
Defective pump
Radio
Communication
See Section 6.3 or 7.3.