Specifications

Planning for

Thermocouple

Measurements

Thermocouples and the thermocouple reference temperature sensor can be wired to

any of the VT1419A’s channels. When the scan list is executed, make sure that the

reference temperature sensor is specified in the channel sequence before any of the

associated thermocouple channels (see the [SENSe:]REF:CHAN command).

External wiring and connections to the VT1419A are made using the Terminal

Module (see page 39).

NOTE The isothermal reference temperature measurement made by a VT1419A applies

only to thermocouple measurements made by that instrument and through the

terminal blocks associated with the reference temperature sensor (for increased

isothermal reference accuracy the VT1586A Rack Mount Terminal Panel has three

reference temperature thermistors). In systems with multiple VT1419As, each

instrument must make its own reference measurements. The reference measurement

made by one VT1419A can not be used to compensate thermocouple measurements

made by another VT1419A.

Field Wiring

Planning the Wiring Layout

28 Chapter 2

Or a Single

VT1518A

For 4 Channels

sense Hi

VT1505A

SCP

(source)

Note

Each channel line

represents both a

Hi and Lo signal

Sense

SCP

Ch 24

Ch 31

Ch 32

Ch 39

Faceplate Conns

rmin

odu

sense Lo

Figure 2-2: Pairing Source and Sense SCP Channels

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