AMI 210BR, Руководство пользователя

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AMI Analyzer Manual Maintenance and troubleshooting
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No voltage or current output to recording device
1. Verify that the output wires are properly stripped and connected at the terminal strip.
2. Verify the connections on the output terminal block.
3. Verify that the output connections are not shorted all the way back to the recording device. Disconnect
the wires from the analyzer and use an ohmmeter to check for shorts or opens.
4. Use a voltmeter to directly measure the output of the analyzer. If the output is set to voltage, make
sure the voltmeter is in voltage mode, and measure between the + and – terminals (not + to GND). If
the output is set to current, measure this voltage, but it should be about 15V no matter what the output
signal is. Change the voltmeter to its current measurement setting, and measure the current between
the + and – terminals. If this is zero, make sure that the voltmeter’s internal fuse hasn’t blown by
measuring a known working current signal with it. Note that you have to disconnect everything else to
measure the current properly – you can’t simply hook it up along with the load.
5. Verify that the unit is set to the correct output. Remove the output board cover and verify that the
switch is in the correct position. This is marked on the PC board itself.
No output alarm indication
1. Verify the alarm set points are correct - press the appropriate switch on the front panel, and check the
displayed reading on the LCD for correct setting.
2. Make sure you understand that the relays act purely as switches – they either connect the two terminals
or they disconnect them.
3. Make absolutely sure you haven’t connected the power hot to one terminal and the ground to the
other. If you have, you probably welded the relay shut or blew the traces off the circuit board or both.
You will need to replace the output relay board if so. No we don’t cover that under the warranty!
4. Verify that the connections on the terminal block are properly stripped and correct.
5. Verify that the alarms are configured correctly, using a PC or similar communication device.
6. Verify the alarm delay time with the PC.
7. Verify that the output connections are not shorted all the way back to the recording device. Disconnect
the wires from the analyzer and use an ohmmeter to check for shorts or opens.
Incorrect readings
1. Verify that there are no leaks in the 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.
3. If spanning on air, verify that the air source is free of water vapor (humid air will contain about 3% less
oxygen than expected, depending on temperature), and if relevant that air from a tank does actually
contain 20.9% oxygen. Manufactured air often does not!