Rae MultiRAE Plus PGM-50/4 - Page 47

Troubleshooting
39
Troubleshooting 39Troubleshooting
High pump
noise.
No inlet suction.
Leaky inlet path.
Defective pump.
Check inlet connection.
Clean or replace pump.
Abnormally low
reading.
Bad calibration. Low
sensitivity to calibration
gas. Wrong span value.
Bad sensor. Low flow.
Recalibrate. Use stronger
span gas. Check span
value. Replace sensor.
Replace filters. Check
flow.
Abnormally high
reading.
Bad calibration. Wrong
span value. Dirty PID
sensor. Dirty filters.
Excessive moisture.
Recalibrate. Check span
value. Clean PID sensor
in methanol in ultrasound
bath. Replace filters. Dry
PID sensor.
Reading jumping
around.
Incorrect calibration gas.
Wrong span value.
Calibrate the sensors. Use
different calibration gas.
Change sensor.
Read a small
background
value.
Small background gas
level present. Sensor
zero drift or newly
installed.
Run fresh air calibration.
Wait for newly installed
sensor to stabilize.
“Lamp” error
message.
Wrong threshold. Weak
lamp. Dirty Sensor.
Adjust threshold. Clean or
replace lamp. Clean PID
sensor.
VOC reading
plateaus at
certain level.
Weak PID lamp. Dirty
PID sensor.
Replace lamp. Clean lamp
& PID sensor. Replace
filters.
Full scale
measurement
in humid
environment.
Dirty or wet sensor.
Clean and dry sensor.
Replace external filter.