Hardy HI 1756-nDF - Manual (Page 52)

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Chapter 6
insure proper balance. Motors can account for this problem. Piping should not apply any
appreciable force on the scale.
mV/V
DC voltage signals are between 0-15 millivolts. Overloads and negative millivolt
readings are not shown as actual readings but 15.3 for over voltage and -0.1 for negative
voltage. You will need to use a multi-meter with a 200 or 300 mVDC range to view the
out-of-range voltages. Millivolt/volt equals the output from a load cell per each volt of
excitation. The HI 1756 nDF reads the load cell output in mV/V, which provides higher
resolution (4 decimal places) than a milli-Volt reading. This provides more sensitivity to
help you troubleshoot the condition of the load cell under certain conditions. Load cells
are rated in millivolts/volts. To convert to mV, multiply the mV/V times the sense
voltage.
IT Test
If your system has an Integrated Technician Summing Junction box, the IT test can help
identify individual load cell problems up to a maximum of four load cell selections.
Sensor Number
Indicates which sensor is under test. Select the target sensor to be tested.
Warning Do not install your HI 215IT summing board in areas susceptible to high vibrations. The
relays on the board can chatter and affect your weight readings and the vibration can
crystallize the solder joints.
General Troubleshooting Flow Chart Index
B
F
G
H
J
K
Electrical, Mechanical and
Configuration reviews
Trad. Cal - A/D Failure Error
Mechanical Inspection
Electrical Inspection
Load Sensor Installation
A
Drifting or unstable weight readings
Verify individual load sensor operation