Chino AL3000 SERIES, Инструкция по эксплуатации

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19-4
3. Connections
Connections depend upon the input types.
Connect a standard tool and other tools to the measuring input terminals to be adjusted.
○
1
In case of thermocouple input
The electromotive force of the thermocouple input becomes small by the electromotive force equivalent to
the temperature at terminals. The instrument itself compensates for the electromotive force equivalent to the
temperature at terminals. This is called reference junction compensation. Accordingly, the reference junction
compensator is necessary for reducing the electromotive force compensated.
○
2
In case of DC voltage input
○
3
In case of resistance thermometer input
4. Checking method
Give an input (T) corresponding to 0%, 50%, and
100% of the printing range from a standard tool and
obtain an error (e) by reading measured values (M).
Turn off the source power supply before starting connections for the purpose of preventing an electric
shock accident.
Turn off the source power supply before starting connections
Caution
1 2 3 4 5 6
Test tube
Thermocouple wire*
*Thermocouple of the same type as the input type
Vacuum bottle
Ice + distilled water
Silicon oil
Copper lead wire
Reference junction compensator
DC standard voltage
generator
Input terminals
( )
( )
DC standard voltage
generator
Input terminals
( )
( )
(A)
(B)
Standard variable
resistor
Input terminals
(B)
1 2 3 4 5 6
1 2 3 4 5 6
e(%)=
M-T
T
× 100
How to obtain an error