Hardy HI 1769-FC - Manual (Page 9)

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Chapter 2
Chapter 2 Specifications
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Chapter 2 provides specifications for the HI 1769-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
Conversion Rate
100 updates per second (10 mS)
Resolution n
Internal:1:8,388,608
Input
Up to four 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
120dB from 59 to 61 Hz
Common-Mode Voltage Range
2.5VDC maximum (with respect to earth ground)
Bus Input Voltage
5 VDC
Bus Current Load
<0.5 Amp at 5 VDC
Bus Power Load Power Load
< 5W at 5 VDC
C2 Calibration Input
Isolation from digital section 1000 VDC minimum.
Cable lengths
500 feet maximum of C2 authorized cable
250 feet maximum of C2 authorized cable (Maximum of 4 load sensors) with IT Junction
box.
Load Cell Excitation
5 VDC
C2 Calibration Output
Isolation from digital section 1000 VDC minimum