Cooper Instruments & Systems DFI 7000 Digital Force Indicator - Manual

CF11 1 V-May 2003-008-0186-00
DFI 7000 DIGITAL FORCE INDICATOR USER’S GUIDE
1.0 INTRODUCTION
The DFI 7000 Signal Conditioner-Indicator is a complete 4-1/2-digit signal conditioner and indicator housed in a 1/8
DIN case. This unit provides many of the features found on expensive, larger signal conditioning units.
• Full 20,000 count resolution
• Accepts strain-gage transducer inputs from 0.5 to 50 mv/v
• 0-5V output
• +/-0.03% accuracy
• Screw-type power and I/O connectors
• Shunt calibration from front-panel
• 1/8 DIN “panel meter size” case
• 5- or 10-volt transducer excitation
• Optional Dual Limits
• Optional Peak Detector
• Optional Track-and-Hold
• 110- or 220-V Power
2.0 DESCRIPTION
2.1 Configuration
Within the DFI 7000’s enclosure there are three printed circuit boards (four if an option is selected). The Main
Board contains the circuitry for the power supply and A/D converter. The Display Board contains all circuitry
needed to drive the LED display and the units display bar. The Signal Conditioner Board contains circuitry for the
signal amplifier and for the excitation power supply.
The Display Board solders to the main Board, whereas the Signal Conditioner plugs into it. If the Dual Limits, Peak
Detector or Track-and-Hold option is supplied, a fourth plug-in board houses it. DUE TO SPACE CONSTRAINTS,
ONLY ONE OPTION CAN BE INSTALLED ON A PARTICULAR UNIT. Adjustments for COARSE SPAN, COARSE
ZERO, FINE ZERO, and SCALING are provided. FINE ZERO and FINE SPAN may be adjusted from the front
panel without removing the front bezel. The entire unit may be quickly panel- or rack-mounted with the snap-on
attachments supplied with every unit.
2.2 Specifications
GENERAL
# Channels
1
Case Material Noryl Plastic
Temperature Storage -20 ° F to 200° F
Temperature Operating 32 ° F to 130° F
TRANSDUCER INTERFACE
Transducer Excitation
5 or 10 VDC
Type of inputs accepted 0.5 mv/v to 5.0 mv/v or 5 mv/v to 50 mv/v
Transducer Current drive (ma.) 50
Input Gain Range 10-1000
Push Button Shunt Cal Yes
Calibration Method Manual (front panel)
Zero Balance +/- 15% F.S. Min.
Noise & Ripple <100 microvolts
Transducer Minimum Impedance 350Ω (10v Exc.)