AND AD-4401A - Load Cell Connection and Checklist

AD-4401A
Page 75
19.10. Checking the Load Cell Connection with a Digital Multimeter
The load cell connection can be checked easily using a digital multimeter.
Measurement point Item to be measured Judging
1
EXC+
4
EXC-
Load cell excitation voltage Normally 9 to 10 V.
5
SIG+
6
SIG-
Load cell output voltage Normally 0 to 30 mV.
1
EXC+
2
SEN+
EXC+ voltage drop by load
cell cable
Normally 0.2 V or less.
The value may exceed 2 V when a long cable is used.
For the 4-wire connection, it is 0 V.
4
EXC-
3
SEN-
EXC-
voltage drop by load
cell cable
Normally 0.2 V or less.
The value may exceed 2 V when a long cable is used.
For the 4-wire connection, it is 0 V.
6
SIG-
4
EXC-
Load cell middle point
voltage
Normally 4.5 to 5 V, half of the load cell excitation
voltage.