350
ohm
350 ohm
35
0 o
hm
35
0
oh
m
A
B
C
D
lo
w
o
h
m
lo
w
o
h
m
temperature
correction
temperature
correction
+E
-S
-E
+S
BALANCED BRIDGE
10 VOLT POWER
SUPPLY
Vout = O VOLTS,
BS AND -s
A method to check the basic function and integrity of a load cell can be
done using an ohmmeter and voltmeter with up to a 10volt power supply.
Before the load cell is connected to the power supply use the ohmmeter
to measure the resistance between the wires. Typical resistance values
are:
+E to -E
410 ohms ±30 ohms
+S to -S
350 ohms ± 2 ohms
+E to +S or any other combination similar approximately 270 ohms
If the load cell has Sense connections in addition they are connected to
the excitation internal to the load cell.
Connect the load cell +E and -E to a power supply, typically 10 volts.
Never use more than 12 volts as it may damage the load cell.
Measure the voltage bS and -S.
With no load the voltage should be approximate 0mv ±3mv.
With a mass on the load cell the output voltage should increase. The
amount it increases will be dependent upon the sensitivity of the load
@Adam Equipment Company 2007
16
