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Zero/Span Ratio
Instrument Controls
Thermo Fisher Scientific
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.
In the Main Menu, choose Calibration > Zero/Span Check >
●
Zero/Span Ratio.
The Instrument Controls menu contains a number of items. The software
controls listed in this menu enable control of the listed instrument
Menu
functions.
In the Main Menu, choose Instrument Controls.
●
ZERO/SPAN AVERAGING TIME:
CURRENTLY:
SET TO:
CHANGE VALUE
SAVE VALUE
RANGE
AVG
DIAGS ALARM
ZERO/SPAN RATIO:
CURRENTLY:
SET TO:
CHANGE VALUE
SAVE VALUE
RANGE
AVG
DIAGS ALARM
INSTRUMENT CONTROLS:
>OZONATOR
PMT SUPPLY
AUTO/MANUAL MODE
DATALOGGING SETTINGS
COMMUNICATION SETTINGS
I/O CONFIGURATION
TEMPERATURE COMPENSATION
RANGE
AVG
DIAGS ALARM
PRESSURE COMPENSATION
SCREEN CONTRAST
SERVICE MODE
DATE/TIME
Instrument Controls Menu
60 SEC
90 SEC ?
1:1
2:1 ?
Model 42i Trace Level Instruction Manual
Operation
3-25
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Troubleshooting
