Analytical Industries GPR-2800 AIS ATEX Oxygen Analyzer - Manual (Page 32)

Advanced Instruments Inc.
32
7 Spare Parts
Recommended spare parts for the GPR-2800AIS Oxygen Transmitter:
Item No. Description
GPR-11-24 Oxygen Sensor
XLT-11-24 Oxygen Sensor
Other spare parts:
Item No. Description
HTR-1004 Heater Low Power Sensor Housing
A-1004-2-14 Housing Sensor Stainless Steel
A-1016-A Housing Sensor Bottom Assembly Stainless Steel
B-2762-A-2-14 Housing Sensor Upper Assembly Stainless Steel
MTR-1011 Meter Digital Panel LCD Backlight
MTR-1014 Meter Digital Panel LCD Low Temperature
ORNG-1007 O-ring 3/32 x 1-3/8 x 1-9/16 Viton
A-1151-AIS-2 PCB Assembly Main / Display
A-1166-AIS-AC PCB Assembly Interconnection / AC Power Supply
A-1166-AIS-DC PCB Assembly Interconnection / DC Power Supply
8 Troubleshooting
Symptom
Possible Cause Recommended Action
Slow recovery or
At installation, defective sensor
Air leak in sample system connection(s)
Abnormality in zero gas
Damaged in service - prolonged exposure to
air, electrolyte leak
Sensor nearing end of life
Replace sensor if recovery unacceptable or O
2
reading fails to reach 10% of lowest range
Leak test the entire sample system: Vary the flow
rate, if the O
2
reading changes inversely with the
change in flow rate indicates an air leak - correct
source of leak
Qualify zero gas (using portable transmitter)
Replace sensor
Replace sensor
High O
2
reading
after installing
or replacing sensor
Transmitter calibrated before sensor stabilized
caused by:
1) Prolonged exposure to ambient air, worse
if sensor was unshorted
2) Air leak in sample system connection(s)
3) Abnormality in zero gas
Allow O
2
reading to stabilize before making the
span/calibration adjustment
Continue purge with zero gas
Leak test the entire sample system (above)
Qualify zero gas (using portable transmitter)
High O
2
reading
Sampling
Flow rate exceeds limits
Pressurized sensor
Improper sensor selection
Correct pressure and flow rate
Remove restriction on vent line
Replace GPR/PSR sensor with XLT sensor when
CO
2
or acid gases are present