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7.4 Making the Settings of the 8937 VOLTAGE/TEMP UNIT
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Measurement range 20℃/DIV 40℃/DIV 100℃/DIV 200℃/DIV
Upper limit of
measurement input
400 800 2000 4000
Lower limit of
measurement input
-92℃ -184℃ -460℃ -920℃
Setting reference junction compensation
Set reference junction compensation.
When connecting a thermocouple directly to the input module, select [RJC
Internal].
Reference junction compensation is performed within the input module.
When connecting through a reference junction device (e.g., a 0
o
C control tank),
select [RJC External]
When measuring temperature with thermocouple, temperature differential is
measured between device to be tested and tester terminal. Reference junction
compensation enables direct reading of temperature of device to be tested by
compensating for tester teminal temperature.
Method Screen: CHANNEL 1
1. Call up the CHANNEL 1 or DISPLAY screen.
2. Move the flashing cursor to the point shown
in the figure on the left.
3. Use the function keys to make the selection.
: Reference junction compensation is
performed internally by the 8937.
(Measurement accuracy is the sum of the
accuracy of temperature measurement plus
reference junction compensation accuracy.)
: Reference junction compensation is not
performed by the 8937. Select this option
when using an external reference junction
compensation unit.
(Measurement accuracy refers only to the
accuracy of temperature measurement.)
Discriminating between internal and external
reference junction compensation
Internal: No underbar appears below C.
External: The underbar appears below C.
Measurement range and upper and lower limits of measurement input
Note that the upper and lower limits of measurement input vary according to
measurement range. Waveform saturation will result if the limits indicated in
the table below are exceeded.
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