Specifications

Field Wiring
Preferred Measurement Connections
Chapter 2 37
10 kOhm
(part of Term. Mod.)
Stimulus Current
from VT1505A
Current Hi (–)
Current Lo (+)
10 kOhm
(part of Term. Mod.)
10 kOhm
(part of Term. Mod.)
Device
Under Test
Device
Under Test
Device
Under Test
Device
Under Test
pressure
+
power
P
to
V
P
to
V
– power
– power
Shield
Shield
Shield
Hnn
Lnn
G (guard)
G (guard)
G (guard)
G (guard)
G (guard)
GND
Example for
Powered
Transducers
A
B
C
D
E
Example for
Thermocouples
Hnn
Lnn
pressure
+ power
Shield
Shield
Example for
Resistive
Transducers
Hnn
Lnn
GND
GND
try either
Hnn
Lnn
GND
try either
Hnn
Lnn
GND
Figure 2-9: Preferred Signal Connections
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