Isotech TTI-7-R, Operator'S Handbook Manual

Page: 46 / 120

Operating the TTI-7-R
5.4.7 Selecting the reference junction compensation method
1.
You can select the reference junction compensation method after
selecting the thermocouple type by pressing
[OK] instead of [Quit].
The screen displays:
RJ mode?
Off Int Ext Quit OK
The menu options list the three reference junction methods
supported:
Menu option
Description When used
[Int]
Internal reference junction
compensation using the
TTI-7-R 's internal
temperature compensated
copper isothermal junction.
This is the default mode.
For direct temperature
connection with no
external reference
junction. High accuracy
measurement, requiring
no additional connection
reference junctions.
[Ext]
External reference
junction compensation
using PRT measurement
of reference junction. No
measurement channels
are lost as the reference
channel PRT uses the
corresponding input
channel.
For temperature
controlled or ovenised
reference junctions.
[Off]
No reference junction
compensation applied to
the measurement. All
measurements are made
with respect to 0 °C. Used with an external ice
point reference junction.
Suitable for highest
precision measurement.
Select the reference junction method with the appropriate function key.
If you have selected [Off] or [Int], you can now press [Quit] to start
measurement.
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