Comparison Of Bridge Measurement Instructions; Excitation And Measurement Sequence For 4 Wire Full Bridge - Campbell CR510 Operator's Manual

SECTION 13. CR510 MEASUREMENTS
FIGURE 13.4-2. Excitation and Measurement Sequence for 4 Wire Full Bridge
TABLE 13.4-1. Comparison of Bridge Measurement Instructions
Instr. # Circuit
4 DC Half Bridge The delay parameter
5 AC Half Bridge
6 4 Wire
Full Bridge
13-14
Description
allows the user entered
settling time com-
pensate for capacitance
in long lead lengths. No
polarity reversal. One
single-ended measure-
ment. Measured
voltage output.
Rapid reversal of
excitation polarity for
ion depolarization.
One single-ended
measurement at each
excitation polarity.
Ratiometric output.
One differential
measurement at each
excitation polarity.
Ratiometric output.
Instr. # Circuit
7 3 Wire
Half Bridge
8 Differential
Measurement
with Excitation
9 6 Wire
Full Bridge
or 4 Wire
Half Bridge
Description
Compensates for lead
wire resistance,
assuming resistance is
same in both wires.
Two single-ended
measurements at each
excitation polarity.
Ratiometric output.
Makes a differential
measurement without
reversing excitation
polarity. Used for fast
measurements on load
cells, PRTs etc.
Resolution and common
mode rejection worse
than 6 if used with delay
= 0. Measured voltage
output.
Compensates for lead
wire resistance. Two
differential measure-
ments at each
excitation polarity.
Ratiometric output.