13.4 Zero-position Calibration (Zero Adjustment)
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The zero position may shift over time. You can use the procedure below to zero-
position calibrate all analog input channels of the 8948 Voltage/Temp Units and
8949 Universal Units connected to the instrument.
1. Turn the power on while pressing
and then release the key
when the model name and version
appear in the display area.
The instrument enters setting mode.
2. Press multiple times until the following zero-adjustment execution
screen appears.
3. Press to start zero adjustment.
Zero adjustment takes approximately 1 minute to finish.
4. Press to end the zero adjustment end screen.
5. Press multiple times until the following setting mode end screen
appears.
6. Press to end setting mode.
13.4 Zero-position Calibration (Zero Adjustment)
(While executing zero adjustment)
(When zero adjustment is finished)
• To ensure zero-position calibration is accurate, disconnect any cables con-
nected to the terminal blocks of the 8948 Voltage/Temp Units and 8949 Univer-
sal Units connected to the instrument. Also, be sure to perform calibration
while the terminal blocks are mounted to the units.
• When carrying out temperature measurement with a thermocouple (reference
junction compensation: internal), it is not possible to adjust the channels to a
certain temperature or correct differences between the measurement values of
the channels.
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