User`s guide

59
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Chapter 7
G - Calibration Failed: A to D and Motion Errors
You may ZERO out chains and temporary calibration equipment to hold or hoist test
weights. Zeroing the temporary weight does not affect the calibration.
H - Mechanical Inspection
G
V
erify some base operational conditions
Using a millivolt meter, verify that:
• The signal millivolt reading is positive and within the
acceptable range of 0 to 15 mV.
• When weight is applied there is a positive increase
in the signal millivolt readings
• The compression load cell has not been installed
upside down. Refer to the load cell installation guide
for installation instructions.
• No mechanical binding is restricting the vessel
movement during the load
• The load cell wiring is correct
• Each load cell signal changes under load. A single
l
oad cell installed upside down or wired backwards
can change the total signal output.
ERROR
PROCEED
WITH
CALIBRATION
Contact Hardy
Customer Service
[phone]
Ext. 1757
Yes
No