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133
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18.4 Connections
Connections depend upon the input types. Connect tools such as standard tools to the measuring input
terminals to be adjusted.
<For KR31 0>
(1) In case of the DC voltage input
The 2
nd
, 5
th
and 11
th
terminals of each input terminal
unit are the terminals for adjustment.
For the adjustment, connect to the 2
nd
, 5
th
and 11
th
terminals all together as shown in the right figure.
The 1
st
to 4
th
terminals are adjusted by the adjustment
of the 2
nd
terminal.
The 5
th
to 8
th
terminals are adjusted by the adjustment
of the 5
th
terminal.
The 9
th
to 12
th
terminals are adjusted by the adjustment
of the 11
th
terminal.
(2) In case of the resistance thermometer input
The 2
nd
, 5
th
and 11
th
terminals of each input terminal
unit are the terminals for adjustment.
For the adjustment, connect to the 2
nd
, 5
th
and 11
th
terminals independently as shown in the right figure.
The 1
st
to 4
th
terminals are adjusted by the adjustment
of the 2
nd
terminal.
The 5
th
to 8
th
terminals are adjusted by the adjustment
of the 5
th
terminal.
The 9
th
to 12
th
terminals are adjusted by the adjustment
of the 11
th
terminal.
(3) In case of the thermocouple input
The 1
st
, 6
th
and 12
th
terminals of each input terminal unit are the terminals for adjustment. For the
adjustment of thermocouples, connect to the 1
st
, 6
th
and 12
th
terminals independently as shown in the
right figure.
The electromotive force of the thermocouple input becomes small by the electromotive force equivalent
to the temperature at terminals. The instrument itself compensates for its value. This is called the
reference junction compensation. The input for the adjustment is entered with the reference
electromotive force (0°C at reference). Accordingly, the reference junction compensator is used for
reducing the reference junction compensated value.
Turn off the power source before connections
Turn off the power source before connections for preventing electric shock.
Caution
DC standard voltage generator
Input terminal block
(+)
(-)
Standard variable resistor
Input terminal block
(B)
(B)
(A)
The 1
st
, 6
th
and 12
th
terminals are used for
adjusting 3 elements for measuring the
terminal temperature.
Input terminal block
(+)
(-)
Ice + distilled water
Vacuum bottle
Thermocouple wire *
Test tube
Silicon oil
Reference junction compensator