Teledyne 2120XL - Trace Nitrogen Analyzer User Manual
Page 59
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