Teledyne 3000ZA - Trace oxygen analyzer - Manual (Page 50)

Operation 3000ZA
Teledyne Analytical Instruments 38
TRAK/HLD Auto—Cal
PSWD Logout More
Use the __ arrow keys to blink More , then press Enter.
Version Self—Test
Use the __ arrow keys again to move the blinking to the Self–Test
function. The screen will follow the running of the diagnostic.
RUNNING DIAGNOSTIC
Testing Preamp — 83
During preamp testing there is a countdown in the lower right
corner of the screen. When the testing is complete, the results are
displayed.
Power: OK Analog: OK
Preamp: 3
The module is functioning properly if it is followed by OK. A
number indicates a problem in a specific area of the instrument. Refer to
Chapter 5 Maintenance and Troubleshooting for number-code
information. The results screen alternates for a time with:
Press Any Key
To Continue...
Then the analyzer returns to the initial System screen.
4.3.6 Version Screen
Move the __ arrow key to More and press Enter. With Version
blinking, press Enter. The screen displays the manufacturer, model, and
software version information.
4.3.7 Showing Negative Oxygen Readings
For software version 1.4.4 or later, the instrument only displays
oxygen readings that are positive or zero. The instrument can be
reconfigured to show negative readings if sensor output drifts below
zero. This situation may arise after the instrument has been zeroed. As
time progresses, the sensor may drift below the zero calibration setpoint.
To show negative oxygen readings on the display:
Press the System key