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AD-4411
12.2. Checking the connection to load cell with using a multimeter
If the load cell signal is not converted correctly, measure and check the voltage between the following points
with a digital multimeter.
Measurement
point
Item to be measured
Judging
EXC+ EXC- Load cell power supply voltage Normally 5±0.25 V.
SIG+ SIG- Load cell signal voltage
Normally 100 mV or less.
EXC+ 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.
EXC- 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.
SIG- EXC- Load cell middle point voltage
Normally 2.5 V, half of the load cell excitation voltage.
Shield
Load cell excitation v
Load cell
Sensing -
S
Load cell excitation voltage -
Load cell signal -
Summary of Contents for AD-4411
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