VTI Instruments EX1629 - Page 33

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EX1629 Preparation for Use 33
Voltage Measurement(1 of 48 channels)
TEDS
COMM
External customer
shunt cal
resistor terminals
Internal
Rcal
55K
-R Cal
+R Cal
8-pin telcom
connector (RJ-45)
350
120
User
10K
10K
+Excitation Sense
+ Excitation
- Excitation
+Excitation
+Sense
-Sense
+Excitation Sense
-Excitation Sense = 0 V
-Excitation
-Excitation Sense
10K
10K
Instrumentation
Amplifier
+
-
x1
x10
x100
Hi
Lo
Shield
150
150
-Sense
-Cal
AGND
+Sense
Wagner
+Cal
AGND
430 kHz
LOW-PASS
FILTER
60.3 kHz
LOW-PASS
FILTER
ADC
TRIFILAR
FILTER
HI
LO
* The parameter of the must be set to 0 V.negativeExcitationVoltage vtex1629_set_excitation function
FIGURE 2-6: VOLTAGE MEASUREMENT CONFIGURATION (DIFFERENTIAL INPUT)