A&D RA3100 Omniace, Instruction Manual

Page: 118 / 176

9.Using Optional Modules - 9.5.Two Channel Temperature Module (RA30-106)
118 1WMPD4004444
2.2 Thermocouple (TC) sensor connection diagram
Non-contact type thermocouple Sheath (shield) Thermocouple
Thermocouple and sheath
Connect as required Insulated
Temperature sensor connectors
Contact type thermocouple Sheath (shield) Thermocouple
Connected to sheath at
end of thermocouple (TC)
Do not connect S terminal
Temperature sensor connectors
2.3 Types and characteristics of thermocouples (TC)
Thermocouple
(TC)
Characteristics Disadvantages
B High usage temperature.
Cannot measure low temperatures at or
below 0°C.
R, S
Suitable for precise measurement in
oxidizing atmospheres and inert gas at high
temperatures. Good precision and little
variation or deterioration Used as standard
thermocouple (TC).
The electromotive force characteristic
has poor linearity.
Poor linearity of electromotive force
characteristic.
Cannot measure low temperatures at or
below 0°C.
N
Stable thermo-electromotive force at a wide
range of temperatures from low temperature
to high temperature
K
Good linearity of thermo-electromotive force
and suitable for oxidizing atmospheres. Most
common for industrial use.
Poor linearity of electromotive force
characteristic.
E High thermo-electromotive force.
J
High thermo-electromotive force, for
industrial use and medium range
temperatures.
Poor linearity of electromotive force
characteristic.
T
Stable thermo-electromotive force and
suitable for precision measurement at low
temperatures.
Low maximum usage temperature.
C
Suitable for reducing atmospheres, inert
gases, and hydrogen gas.
Cannot be used in air.
+
-
S
+
-
S