Teledyne 2120XL - Trace Nitrogen Analyzer - Manual (Page 69)

Trace Nitrogen in Argon Analyzer Operation
Teledyne Analytical Instruments 57
When the counter reaches zero, the display switches to display the
gain on G1:
Zero Settling: G1/11
Δ2.1 Val:-12345
where Δ Val:-12345 is a live display of the change in the adc.
Shortly the display will change to a second screen representing the
gain on G2:
Zero Acquired G1/1
Δ-3.6 Val:-12345
followed by:
Zero Acquired G01/1
Δ 0.6 Val:-12345
where the Δ Val:-12345 is the live display of the change in the adc for
G01.
When the countdown reaches zero, zero calibration is complete and
the screen reverts to the Analyze mode screen.
4.5.2.4 S PAN C ALIBRATION
The SPAN button on the front panel is used to enter the span
calibration function. Span calibration can be performed in either the
automatic or manual mode. In the automatic mode, an internal
algorithm compares consecutive readings from the sensor to determine
when the output is within the acceptable range for span. In the manual
mode, the operator determines when the reading is are acceptably close
to the actual span concentration. Make sure the span gas is connected to
the instrument. See Section 3.6 for gas connections.
After pressing the SPAN button, the mode selection screen appears:
Select Span
Mode : Manual (Auto)
where Manual and Automatic can be toggled back and forth using the