Hardy Process Solutions C Series, Operation And Installation Manual, Page: 15 / 92

Chapter 1 - Overview
1-5
Digital Volt Meter
(DVM) - Optional
Requires the HI 215IT Junction Box and Hardy Con-
figuration Software to monitor both mV and mV/V
readings per individual load sensor. Once a problem is
detected by the operator the DVM readings help the
operator to isolate the faulty component. Further, the
DVM readings can be used to level a balanced system
and to make corner adjustments to platform scales.
Accuracy is +/- 2% or better of full scale.
NOTE: If you do not have the HI 215IT Junction Box con-
nected to the module, the mV/V reading as displayed
in the Configuration Software, Test display is the total
for all the load cells on the system.
Return to Zero
Test - Optional
Requires the HI 215IT Junction Box to monitor indi-
vidual load sensors. The Hardy configuration Soft-
ware is required when using this option. This test
compares the original voltage reading (saved at cali-
bration) against the current voltage reading of an
empty vessel. The test displays a “Passed Return to
Zero Test” or a “Failed Return to Zero Test” statement
when running the System Test from the Configuration
Software, Test Display, depending on the outcome of
the test. The test checks for damaged load sensors due
to electrical zero shift or abnormal mechanical forces
that cause binding on one or all of the load sensors in
the system.
Weighing System
Tests - Optional
Requires the HI 215IT Junction Box. This test is used
to diagnose drifting or unstable weight reading prob-
lems. The Weighing System Test does the following:
1. Disconnects the controller and engages an inter-
nal reference signal to see if the problem is within
the instrument.
1. Disconnects the load sensors and engages an
internal (in the junction box) reference signal to
see if the cable between the instrument and the
Junction Box is causing the problem.
2. Reads the weight of each load sensor to see if the
load sensor might be causing the problem.
The ability to read the weight seen by each individual
load sensor allows use of this test to make cornering,