㵪
101
㵪
(3)
Calibration of Reference Junction Compensation
Calibrate the reference junction compensation in the case of thermocouple input.
Example)
Connect the input to Channel 1 and set the calibration when the thermocouple
input value (RMC measurement) is -0.5 (input 0
㷄
), the measured RJC temperature
is 24.5
㷄
.
1) Check the Process variable when impressing 0.000mV±2
㱘
V to Channel 1 by the voltage
generator beforehand. (In this example, it is -0.5
㷄
.)
2) Check the terminal temperature of Channel 1 at the data calibration in the enginnering
mode (Reference junction compensation). (In this example, it is 24.5
㷄
.)
3) Set the value which is added the difference (0.5
㷄
) with true value as the right RJC
temperature.
㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷
[24.5-(-0.5)=25.0
㷄
]
Calibrate RJC according to the instructions in 7.2.12 Data Calibration (Calibration of reference
junction compensation). (See Page 89)
Precision
Voltage(Current)
Generator
HR-701 (702) Recorder
Input Terminals
Digital Voltmeter
Freezing
Point Cold
Junction
Compensator
(Iced Water)
䋫
䋫
䋭
䋭
䋭
䋭
䋫
䋫
Be sure to attach a terminal cover.
Thermocouple Wires or Compensation Lead Wires
Copper Wires
Wiring
䃢
䋫
䃢
䋭
䃢
䋫
䃢
䋭
䃢
䋫
䃢
䋭
䌛
Note
䌝
㽲㩷
This calibration is conducted when compensation by the recorder's built-in temperature
sensing element (INT: internal compensation) is selected as the reference junction
compensation method.
㽳㩷
Wire to Channels 1 and 2 to calibrate.
㽴㩷
After wiring, attach the terminal covers and wait for 5 minutes or more, then, calibrate it.
Calibration
i
i
Tel: (01943) 602001 Fax: (01943) 816796