Four (4) Wire & Six (6) Wire Measurement Explained; Wiring A Six Wire Strain Bridge Sensor - Honeywell 7561-PSDS User Manual

MODEL 7561-PSDS
PORTABLE SENSOR DISPLAY – STRAIN BRIDGE
Four (4) Wire & Six (6) Wire Measurement Explained
The PSDS utilizes a six-wire measurement system, by default, to achieve maximum
accuracy when connecting to a strain bridge sensor.
Four-wire strain bridge sensor can still be used, but review the recommendations
below to get the best out of the measurement system.
A six-wire measurement system has a very big advantage over a four-wire
measurement system. The length of the cable connecting the handheld to the strain
bridge sensor can be compensated for in terms of losses along its length. Meaning
that even after calibration, the sensor's cables may be lengthened or shortened
without affecting the integrity of the calibration.
The disadvantage is that the handheld needs all six wires connected, even if using a
four-wire strain bridge sensor.
,
NOTE
Version 01.05 firmware allows the global override of 6-wire measurements and
allows the user to select 4-wire measurement.
See Configuration Management
See final wiring diagram in this section for true 4-wire measurement connections.
Wiring a Six-Wire Strain Bridge Sensor
Where possible, six core cable should be used to connect the strain bridge sensor
directly to the PSD connector.
If the cable has twisted pairs refer to the wiring table. It indicates which connections
should share a twisted pair. Note: shield connections are described further on in this
section. Also, the extra two cores required for TEDs connection (If used) are not shown
in the diagram.
Figure 18. Wiring a Six Wire Strain Bridge Sensor
Model 7561-PSDS User Manual |
Issue A
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