31
6. METHOD OF MEASURING OF CJC
6. METHOD OF MEASURING OF CJC
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 thermocouple
+
+
-
-
-
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
temperature/compensation box
when measuring with reference thermocouple set
CJC
in the instrument menu to
IN. 2
or
EX. 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
Ex. 2
)
if the reference thermocouple is located in the same environment as the measuring instrument then set in the instru-
ment menu
CJC
to
IN. 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
Ex. 1
when measuring temperature without reference thermocouple the error in the measured data may be even 10°C
(applies for setting
CJC
to
Ex. 1
)
Summary of Contents for OMX 100 Series
Page 19: ...19 4 INSTRUMENT SETTING CONFIGURATION MODE ...
Page 23: ...23 4 INSTRUMENT SETTING CONFIGURATION MODE ...
Page 27: ...27 4 INSTRUMENT SETTING CONFIGURATION MODE ...
Page 34: ...34 INSTRUCTIONS FOR USE OMX 100 ...
Page 35: ...35 ...
