Hardy HI 1756-FC - Manual (Page 8)

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Chapter 1
to isolate the faulty component. Further, the DVM readings can be used to level a 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 connected to the module, the mV/V reading
is the total for all load cells on the system.
Weighing System Tests - Optional
This test is used to diagnose drifting or unstable weight reading problems. It requires the
HI 215IT Series Junction Box for full utilization. The ability to read the weight seen by
the individual load sensors allows you to use this test for making cornering, leveling and
load sharing adjustments to the weighing system.
The Weighing System Test provides the following problem detection support:
1. Disconnects the controller and engages an internal reference signal to see if the
problem is inside of the instrument.
2. 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.
3. Reads the weight of each load sensor to see if the load sensor might be causing
the problem.
Automatic or Manual Control Modes
Automatic mode corrects for variations in desired flow rates automatically.
Continuous or Batch Modes
User selectable operating modes provide support for continuous or batch processing.
Automatic or Manual Refill
Automatic refill uses user-selectable refill points to start and stop the refill process
without interrupting the feed process. HI and LO alarms are used to detect a refill failure.
The Manual Refill option only allows for manual refill at any time.
Two and Five-Point Automatic Rate Calibration
The 5-point auto rate calibration creates a high feed accuracy for a wide range of feed
rates. It either provides the user with automatically calculated parameters, or it lets users
manually enter their own derived values.