Omron K3HB-H User Manual page 182

6.2 User Calibration Operation
■ Connecting to the Calibrator
X V S
Cold junction compensator
0 C/32 F
K3HB
Cold junction compensating conductor connection
H
• Connect the Calibrator (standard voltage generator or standard
current generator) to the input terminal for the input type to be
calibrated.
• Use a Calibrator with enough precision for the accuracy of the
K3HB.
• Do not cover the bottom during calibration. Never touch the input
terminals or compensating conductor.
Short circuit
K3HB
Cold junction compensating conductor connection
• Connecting the Cold Junction Compensator: The input will not be
correct if the connection terminal of the cold junction
compensating conductor is touched while the thermocouple is
being calibrated. Short (enable) or open (disable) the tip of the
thermocouple in the cold junction compensator with the
compensating conductor connected as shown below. Use this
method to connect and disconnect the cold junction compensator.
• Thermocouples are calibrated by type, i.e., Group 1 (input types 2,
4, 7, 8, 10, and 14) and Group 2 (input types 3, 5, 6, 9, 11, 12, and
13).
• Use the correct compensating conductor for the selected
thermocouple. The cold junction compensator and compensating
conductor for thermocouple K are used for thermocouples R, S, E,
B, and W.
• Set the thermocouple to be calibrated in the cold junction
compensator and setting it to 0ºC. Disable the internal
thermocouple (open the tip).
• Use a calibrator that is sufficiently precise for the accuracy of the
K3BH.
• Do not cover the bottom during calibration. Never touch the input
terminals or compensating conductor.
6.2 User Calibration Operation
X
Cold junction compensator
0 C/32 F
V S H
Open circuit
6-5