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INSTRUCTIONS FOR USE
OM 351
METHOD OF MEASURING OF THE CJC
8
An istrument with input for temperature measurement with thermocouple allows for setting of two types of measurement of
the cold junction.
J
+
V
J
2
Reference thermocouple
Measuring thermocou
+
+
-
-
-
OM xxx T/C
1
WITH REFERENCE THERMOCOUPLE
– a reference thermocouple may be located in the same place as the measuring instrument or in place with stable tempera-
ture/compensation box
– when measuring with reference thermocouple set
CJC
in the instrument menu to
In. 2
or
E. 2
– when using a thermostat (a compensation box or environment with constant temperature) set in the instrument
menu
t.C.J.
its temperature (applies for setting
CJC
to
E. 2
)
– if the reference thermocouple is located in the same environment as the measuring instrument then set in the
instrument menu
CJC
to
I
n. 2
. Based on this selection the measurement of the surrounding temperature is
performed by a sensor located in the instrument terminal board.
WITHOUT REFERENCE THERMOCOUPLE
– inaccuracy originating from the creation of dissimilar thermocouples on the transition point terminal-conductor of the
thermocouple is not compensated for in the instrument
– when measuring without reference thermocouple set
CJC
in the instrument menu to
In..1
or
E.1
– when measuring temperature without reference thermocouple the error in the measured data may be even 10°C
(applies for setting
CJC
to
E.1
)
Содержание OM 351
Страница 25: ...INSTRUCTIONS FOR USE OM 351 25 RTD RTD RTD RTD RTD RTD RTD RTD RTD RTD 5 SETTING light light ...
Страница 27: ...INSTRUCTIONS FOR USE OM 351 27 T C T C T C T C T C T C T C T C T C T C T C 5 SETTING light light ...
Страница 33: ...INSTRUCTIONS FOR USE OM 351 33 5 SETTING light light ...
Страница 35: ...INSTRUCTIONS FOR USE OM 351 35 6 SETTING profi profi ...
Страница 53: ...INSTRUCTIONS FOR USE OM 351 53 6 SETTING profi profi ...
Страница 55: ...INSTRUCTIONS FOR USE OM 351 55 SETTING user user 7 ...
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