Cell Failure; Span Cal; Auto Mode Spanning - Teledyne 6000A Operating Instructions Manual

3 Operation

3.4.1.3 Cell Failure

Detector failure in the 6000A is usually associated with inability to zero the
instrument with a reasonable voltage differential between the reference and
measure voltages. If this should ever happen, the 6000A system alarm trips, and
the LCD displays a failure message.
Before optical balancing:
a. Check your zero gas to make sure it is within specifications.
b. Check for leaks downstream from the Sample Cell, where con-
tamination may be leaking into the system.
c. Check flowmeter to ensure that the flow is no more than 200
SCCM
d. Check temperature controller board.
e. Check gas temperature.
f. Check the Sample Cell for dirty windows.
If none of the above, proceed to perform an optical balance as described in
section 5.

3.4.2 Span Cal

The Span button on the front panel is used to span calibrate the analyzer.
Span calibration can be performed in either the automatic or manual mode.
Make sure the span gas is flowing to the instrument.
3.4.2.1
Observe all precautions in sections 3.4 and 3.4.2, above. Press Span to
enter the span function. The screen that appears allows you to select whether the
span calibration is to be performed automatically or manually. Use the ∆ ∆ ∆ ∆ ∆ ∇
arrow keys to toggle between
appears, blinking, on the display.
Press Enter to move to the next screen.
3-18 Part I

Auto Mode Spanning

and span settling. Stop when
Teledyne Analytical Instruments
Model 6000A