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Zero/Span/Purge
Duration Minutes
Zero/Span Averaging
Zero/Span Ratio
Thermo Fisher Scientific
The Zero Duration Minutes screen defines how long zero air is sampled by
the instrument. The span and purge duration screens look and functions
the same way as the zero duration screen, and are used to set how long the
span gas and sample gas are sampled by the instrument. Durations between
0 and 60 minutes are acceptable. Each time a zero/span check occurs the
zero check is done first, followed by the span check. To perform just a zero
check, set the span and purge duration screens to 0 (off). The same applies
to perform just a span or purge check.
In the Main Menu, choose Calibration > Zero/Span Check > Zero, Span
or Purge Duration Min.
ZERO DURATION:
CURRENTLY:
RANGE
The Zero/Span Averaging Time screen allows the user to adjust the
zero/span averaging time. The zero/span averaging time is used by the
Time
analyzer only when performing an automatic zero, or span check, or
calibration. The analyzer's averaging time is used for all other functions.
The following averaging times are available: 1, 2, 5, 10, 20, 30, 60, 90,
120, 180, 240, and 300 seconds.
In the Main Menu, choose Calibration > Zero/Span Check > Zero/Span
Avg Sec.
ZERO/SPAN AVERAGING TIME:
CURRENTLY:
RANGE
The Zero/Span Ratio screen is used to adjust the ratio of zeros to spans. For
example, if this value is set to 1, a span check will follow every zero check.
If this value is set to 3, there will be two zero checks between each
zero/span check. This value may be set from 1 to 10, with 1 as default.
SET TO:
MOVE CURSOR
CHANGE VALUE
AVG
DIAGS ALARM
SET TO:
CHANGE VALUE
SAVE VALUE
AVG
DIAGS ALARM
Model 43i Trace Level-Enhanced Instruction Manual
30 MIN
31 MIN ?
SAVE
60 SEC
90 SEC ?
Operation
Calibration Menu
3-21
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Troubleshooting
