Teledyne 2120XL - Trace Nitrogen Analyzer - Manual (Page 68)

Operation Model 2120XL
Teledyne Analytical Instruments 56
▲/▼ arrow keys. Once the proper mode is displayed, press ENTER.
The following screen appears:
Zero Offset 0.0 pp b
to Begin
This screen allows the user to add a zero offset if desired. With the
value adjacent to Zero Offset blinking, use the ▲/▼ arrow keys to enter
any offset required. Press ENTER when finished.
4.5.2.3.1 Manual Zero
If manual zero mode was selected, the following screen appears:
N2: 1.2 pp b Zero
to Finish
In the Manual Mode, the user has the opportunity to decide when
the zero settling is close enough to zero to be valid. When the value
adjacent to
N2 is sufficiently close to zero and sufficiently stable, press
ENTER to accept the zero reading.
After pressing ENTER two screens will appear that indicate that the
zero level has been acquired and will report the live adc value for the
two gains in the amplifier (G0 and G1) as well as the change (Δ).
Zero Acquired G1/1
Δ 1.2 Val:-12345
shortly followed by:
Zero Acquired G0/1
Δ-0.2 Val:-12345
4.5.2.3.2 Auto Mode Zero
If AUTO mode was selected from the Zero Mode Selection screen
the following screen appears:
Zero Settling: 0:58
The time value displayed at the right count down to zero from the
value currently held in Calholdtimer. See Section 4.5.1.9.