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Generation
27
Note
• When outputting, if you change the generation function or generation range, output turns off
automatically.
• The generation of RTD-use signals in this instrument employs an "active impedance" scheme in
order to provide a dummy resistance. This scheme generates a DC voltage appropriate for the
current being measured that is supplied by a resistance meter such as a multimeter. The scheme,
therefore, can generate correct DC voltages only when the value of the supplied current being
measured is 1 to 5 mA. Note that connecting a low-impedance device (e.g., a voltage source,
capacitor, or resistor) to the output during resistance generation may cause oscillation.
• In the case of generating RTD-use signals, it takes 10 ms in a 500-
Ω
range (refer to the
specifications for other ranges) for the instrument-detected resistance measurement current to
settle within the given accuracy range. This means that the connecting time must be no less than
10 ms where a device that operates by electrically switching its signal input circuit is used.
Reference Junction Compensation
Use a reference junction compensation (RJC) sensor (optional) to calibrate a
thermometer containing built-in RJC without using an external 0
°
C reference junction
chamber.
1
Connect an RJC sensor to the RJC sensor input connector.
When connecting, insert the connector until its upper locking hook snaps into place.
To disconnect the connector, press the hook lightly down to release the lock and
pull it.
Locking hook
Sensor lead
Note
• Do not pull the sensor lead with the connector locked.
2
Connecting the sensor automatically activates the INT RJC state and thermo-
electric power is output with reference to the temperature detected by the RJC
sensor. [INT RJC] is displayed at this time. (For reference temperature
measurement accuracy using an RJC sensor, refer to the section "Specifications" on
page 52.)
• The thermo-electric power when an RJC sensor is connected can be achieved by
subtracting the thermo-electric power detected by an RJC sensor from the thermo-
electric power without an RJC sensor.
RJC sensor
With RJC sensor
Without RJC sensor
20˚C (798
µ
V)
813
µ
V
Generated
voltage
CA100
40˚C
CA100
1611
µ
V
Generated
voltage
Set temperature
40˚C
Set temperature
Free Datasheet http://www.datasheet-pdf.com/