Hardy HI 1756-FC - Manual (Page 9)

Chapter 2 Specifications
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Chapter 2 provides specifications for the HI 1756 FC feeder controller and other
equipment that may come with the package. The specifications listed are designed to
assist in the installation, operation and troubleshooting of the instrument. All service
personnel should be familiar with this section before installing or repairing the
instrument.
Basic Specifications
General
Resolution
Internal:1:8,388,608
Input
Up to eight 350-ohm Full Wheatstone Bridge, Strain Gauge Load Sensor/Cells (5 volt
excitation) on one vessel.
Non-Linearity
0.0015% of Full Scale
Common-Mode Rejection
110dB at or below 60 Hz
Common-Mode Voltage Range
2.5VDC maximum (with respect to earth ground)
Backplane Input Voltage/ Power Load
5 VDC and 24 VDC
Backplane Current Load
<1 Amp at 5 VDC
0.0125 Amps at 24 VDC (with 4-350 Ohm Load Cells)
Backplane Power Load
< 5W at 5 VDC
< .3W at 24 VDC with 4-350 Ohm Load Cells
C2 Calibration Input
Isolation from digital section 1000 VDC minimum.
Cable lengths
1000 feet maximum of C2 authorized cable
250 feet maximum of C2 authorized cable (Maximum of 4 load sensors) with IT Junction
box.
C2® Maximum Cable Length
4
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Chapter 2 ●
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