Reference Temperature Sensing With The Vt1422A - VXI VT1422A User Manual

Reference Temperature Sensing with the VT1422A

VT1422A
On-Board
Current Source
VT1422A
On-Board
Current Source
44 Field Wiring
The Screw Terminal and Spring Terminal Modules provide an on-board thermistor
for sensing isothermal reference temperature of the terminal blocks. Also provided
is a jumper set (J1 in Figures 2-7 and 2-8) to route the VT1422A's on-board current
source to a thermistor or RTD on a remote isothermal reference block. Figure 2-7
and Figure 2-8 show connections for both local and remote sensing. See "Connecting
the On-Board Thermistor" on page 49 for location of J1.
Figure 2-7. On-Board Thermistor Connection
Figure 2-8. Remote Thermistor or RTD Connections
Terminal Module
ON
REM BOARD
J1
Any Sense
Channel
Terminal Module
ON
REM BOARD
J1
Any Sense
Channel
Field Wiring
HTI
LTI
HTS
LTS
Hnn
Lnn
Field Wiring
HTI
LTI
HTS
LTS
Hnn
Lnn
Chapter 2