AMI Analyzer Manual
Maintenance and troubleshooting
11
Troubleshooting
All oxygen applications
Analyzer does not power up.
1.
Plug the charger into it and charge the batteries over night.
2.
If it still won’t power up, remove the front cover.
3.
Check that the cables are plugged into the PC boards.
4.
If nothing seems to be wrong, return the unit to AMI for repair.
Analyzer reads too low
1.
Sensor is not calibrated. Flow span gas through the cellblock and span the analyzer until the analyzer reads
appropriately. Use compressed air or certified calibration gas.
2.
Flow rate is inadequate. Increase the flow using the valve on the flowmeter, or else turn on the pump and adjust the
flow.
Analyzer reads too high
1.
Verify that the gas flow rate is 1 SCFH.
2.
Check for leaks in the sample system using SNOOP or similar.
3.
Oxygen diffusion can be a serious problem. Verify that no silicone tubing is used in the sample system. Use
Copper, Stainless Steel, Teflon
, Tygon
or similar high quality tubing.
4.
Verify the analyzer calibration using air as the span gas.
NOTE: Be careful not to get soap solution on the PC boards!
Analyzer reads zero
1.
The analyzer takes about two minutes to warm up. Give it some time
!
2.
See if it will respond to air. If it does, you have zero oxygen in your sample.
3.
If the analyzer resolutely reads zero all the time, open the front and verify that the wires are connected inside.
4.
If problem persists call AMI for a return authorization number.
Can’t span the unit
1.
(The unit won’t respond to the up and down buttons during span)
2.
Use the AMI communication program to set the security to either “Span only” or “No security”.
3.
Once you have spanned it, set the security back again so people do not adjust it in error.
No output to recording device
1.
This unit has no analog output! You will have to use the digital connection, or download the stored data into a PC.
Incorrect readings
1.
Verify that there are no leaks in the sample system.
2.
Verify that the span gas bottle is correctly marked by comparing its reading when the analyzer has been spanned on
air to what it actually says.
