Planning for
Thermocouple
Measurements
You can wire your thermocouples and your thermocouple reference
temperature sensor to any of the HP E1313/E1413 channels. When you
execute your scan list, you only have to make sure that the reference
temperature sensor is specified in the channel sequence before any of the
associated thermocouple channels.
External wiring and connections to the HP E1313/E1413 are made using the
terminal module (see pages 49 - 51).
Note
The isothermal reference temperature measurement made by an
HP E1313/E1413 applies only to thermocouple measurements made by that
instrument. In systems with multiple HP Scanning A/D Converter modules,
each instrument must make its own reference measurements. The reference
measurement made by one HP E1313/E1413 cannot be used to compensate
thermocouple measurements made by another HP E1313/E1413.
IMPORTANT!
To make good low-noise measurements you must use shielded wiring from
the device under test to the terminal module at the HP E1313/E1413. The
shield must be continuous through any wiring panels or isothermal reference
connector blocks and must be grounded at a single point to prevent ground
loops. See “ Preferred Measurement Connections” on
page 43 for more information.
36 Field Wiring
Chapter 2
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