Hardy HI 2151/30WC Single-Scale Controller User Manual
Page 136
HI 2151/30WC MANUAL
8-16
F - Verify Individual
Load Cell Milli-volt
Readings
Press: ENTER
To check load
sensor
DVMTST
checks individual
load sensor output
mV readings.
Repeat for all load
sensors
mV
readings
acceptable?
If you are unable to determine the Milli-
volt readings. Go to
K Load sharing
OR
Contact Hardy Customer Support
800-821-5831
F
TEST COMPLETE
Yes
Record load
sensor mV output
level for
comparison.
Press TST/CLR
START
INTEGRATED TECHNICIAN
( I.T.)
diagnostic program
Select DVMTST
DVMMV
Press: ENTER
NEXT
Using the load cell certificate, verify the Milli volt per volt rating
Example: 3 mV/V load cells will produce approximately 15 mV at full load.
That is 5 volts excitation X 3 mV/V. A scale capacity of 1,000 lbs with 100
lbs of deadload at empty the loadpoint mV reading should equal 1.5 mV.
Zero mV
reading
High mV
reading
1) Stressed load cell, remove
all load and re-test.
2) Excessive loading.
For additional
testing go to:
NO
Unstable
reading
Defective load cell?
Replace and repeat
TEST
F
Negative
mV reading
A
1) No dead load.
Apply load and re-test.
2) Wiring error.
Verify color code using the
load cell certificate.
3) Open bridge circuit.
Disconnect power and verify
loadpoint bridge resistance
reading with an Ohmmeter.
H
K