Teledyne 2120XL, Operating Instructions Manual, Page: 59 / 85

Trace Nitrogen in Argon Analyzer Operation
Teledyne Analytical Instruments 47

Neg. Flow Adc Error

Bad Adc Channel Sel.

Bad Gain Selected

Zero Fail

Span Fail

Sys Test - - 5V

Sys Test - - 15V

Sys Test - - Dac A

Sys Test - - Dac B

Sys Test - - Preamp 0.0V

Sys Test - - Preamp 0.7V

Sys Test - - Pre Gain Ck
See Section 5.5 for additional information on error screens.
4.5.1.6 A
UTO
C
ALIBRATION
(A
UTO
C
AL
)
This menu allows the user to set a program for initiating a
calibration cycle (zero and span) automatically at a time interval set by
the user. It also is the screen used to turn the auto calibration function
ON or OFF. To use the Auto Cal function, your instrument must be
equipped with the optional auto calibration valve manifold.
Note: To use the Auto Cal function, the analyzer must be
equipped with the Auto Cal option which includes a
solenoid valve manifold for automatic switching of sample,
zero or span gas.
When equipped with the Auto Cal option, the analyzer can cycle
itself through a sequence of steps that automatically zero and span the
instrument.
Note: Before setting up an AUTO-CAL, be sure you understand
the
Zero
and
Span
functions as described in Section 4.5.2,
and follow the precautions given there.
Note: If you require highly accurate AUTO-CAL timing, use external
AUTO-CAL control where possible. The internal clock in the