90
| INSTRUCTIONS FOR USE
OM 402PID
METHOD OF MEASURING
THE CJC
8.
Instrument with input for temperature measurement with thermocouple allows to set two types of measurement of cold junction.
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
CONECT.
in the instrument menu to
INT.2TC
or
EXT.2TC
– when using a thermostat (a compensation box or environment with constant temperature) set in the instrument menu
CJC.TEM.
its temperature (applies for setting
CONECT.
to
EXT.2TC
)
– if the reference thermocouple is located in the same environment as the measuring instrument then set in the
instrument
menu
CONECT.
to
INT.2TC.
Based on this selection the measurement of the ambient 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
CONECT.
in the instrument menu to
INT.1TC
or
EXT.1TC
– when measuring temperature without reference thermocouple the error in measured data may be as much as 10°C
(applies for setting
CONECT.
to
EXT.1TC
)
J
+
V
J
2
Reference thermocouple
Measuring thermocouple
+
+
-
-
-
OM xxx T/C
1
Содержание OM 402PID
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Страница 87: ...INSTRUCTIONS FOR USE OM 402PID 87 6 SETTING PROFI ...
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