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38 of 50 Maintenance and Troubleshooting - 3650 Portable O2 Analyzer
Operator Manual
ORBISPHERE
6.2 Troubleshooting
If your analyzer is behaving strangely (failing to calibrate, giving inappropriate
measurement values, etc.) and you have attempted to rectify the problem by servicing
the sensor (for instructions, see the accompanying EC Sensors - Maintenance &
Installation Manual) to no avail, you may wish to use the Troubleshooting menu to
make sure that the instrument is configured correctly for your application, and is in good
working order.
The instrument must be connected to your PC and placed in measurement mode to
perform these tests.
6.2.1 Serial Test
Normally, the instrument will inform you of a disconnected RS-232 (serial) link when
appropriate. However, you can confirm a good connection using the Troubleshooting,
Serial Link Test by echoing a test message via the instrument.
6.2.2 Keyboard Test
The Troubleshooting, Keyboard Test will reveal whether all the analyzer buttons are
functioning correctly. The box illustrated in Fig 6-2 appears.
Enter text characters in the Text to be sent box, then
click Send. If the serial link is operating correctly, the
exact same text will be displayed back from the
instrument in the Echo box. Choose Cancel to exit from
this test box.
Fig 6-1: Serial Link Test
Press any one of the instrument's buttons
(except the on/off button) for a full second or
more. The appropriate square on-screen should
darken (as illustrated for the Down Arrow
button). Choose Cancel to exit from this test box.
Fig 6-2: Keyboard Test