External Input Reference - Honeywell X Series User Manual

External Input Reference

Copper wire
Thermocouple
cable
External Input Reference.
by a separate temperature measuring device connected to another input, usually RT. This
input is processed in the normal way and then passed back into the thermocouple signal
processing system as a temperature reading.
288
_
*
+
Input
terminals
on rear
panel of
recorder
_
PT100
V
+
Copper
wire
The reference temperature reading in this method is provided
Normal
signal
processing
A
Thermocouple
Table (convert R/T
temp to Volts
C Reading in Volts
D
Temperature
reading to maths
expression
Look-up table
(Volts)
Inputs
(converts
added
voltage read-
(C+D)
ing to tem-
perature)
43-TV-25-30 Iss.6 GLO Aug 07 UK