MultiRAE - Shawcity Limited

No response or low
response to gas input
Slow response to gas input
Erratic reading
Non-zero background
reading
“CAL Err” message during
calibration
Flashing “CAL” message
during normal operation
Readings consistently
wrong when exposed to gas
During normal operation,
“pump” message flashing
“xxx installed
bias error” message on
LCD
Calibrates OK, but LEL or
VOC readings off by
constant percentage.
“Lamp” message during
operation
1) sensor input is blocked or dirty filter
2) defective sensor module
3) defective electronics
4) weak, or leaking pump
5) sensor cover plate missing, loose, or misaligned
6) empty sensor position
1) sensor input is blocked or dirty filter
2) defective sensor module
3) sensor has inherently slow response time
4) weak or leaking pump
5) sensor cover plate missing, loose, or misaligned
6) empty sensor position
1) incorrect calibration
2) defective sensor module
3) defective electronics
4) weak or leaking pump
1) dirty filter
2) incorrect zero calibration or zero drift
3) defective sensor module
4) non-zero background
5) carbon filter saturated or not installed
1) incorrect calibration
2) low gas pressure in gas cylinder
3) defective sensor module or weak lamp
4) leak in flow path
5) defective electronics
1) Test 2.1
2) Test 2.4
3) Test 2.4
4) Test 2.2
5) Test 2.1
6) Test 2.1
1) Test 2.1
2) Test 2.4
3) Test 2.4
4) Test 2.2
5) Test 2.1
6) Test 2.1
1).Test 2.5
2) Test 2.4
3) Test 2.4
4) Test 2.2
1) Test 2.1
2) Test 2.6
3) Test 2.4
4) Test 2.6
5) Test 2.1
1) Test 2.5
2) Test 2.5
3) Test 2.4
4) Test 2.1
5) Test 2.4
1) excessive negative zero drift of sensor 1) Test 2.6
1) incorrect span calibration
2) defective sensor module
3) incorrect correction factor
1) Gas inlet blocked or no connection to inlet port
2) weak or inoperative pump
3) pump stall threshold needs adjustment
1) bias switch in wrong position for Toxic1 sensor
2) defective sensor module
1) Wrong calibration or measurement gas selection
2) Incorrect lamp selected
3) incorrect dilution ratio
1) dirty PID sensor or lamp
2) weak or defective lamp
3) Lamp fail threshold adjustment needed
1) Test 2.5
2) Test 2.4
3) Test 4.5
1) Test 2.1
2) Test 2.2
3) Test 2.7
1) Test 2.8
2) Test 2.4
1) Test 4.5
2) Test 4.5
3) Test 4.5
1) Test 2.9
2) Test 2.9
3) Test 2.9
3) Electronics:
Problem Possible Causes Test Procedures
LED, back light, buzzer or 1) defective component 1) Test 3.2
vibrator alarm inoperative
Missing segment on the
LCD
1) defective LCD
2) temperature too low
3) contrast set too low
1) Test 3.3
2) Test 3.3
3).Test 3.3
4