AMI Analyzer Manual
Maintenance and troubleshooting
17
Troubleshooting
Analyzer does not power up.
1. Plug the charger into it and verify that the green light on the back comes on.
2. Charge the batteries overnight.
3. If it still won’t power up, remove the front cover.
4. Check that the cables are plugged into the PC boards.
5. If nothing seems to be amiss, return the unit to AMI for repair.
Analyzer reads too low
1. Sensor is not calibrated. Flow span gas through the analyzer and span the analyzer until it 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 approximately 1 SCFH.
2. Check for leaks in the sample system using SNOOP or similar.
3. Oxygen diffusion can be a 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.
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 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 User Interface 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.
