Cooper Instruments DFI-700DM Installation Manual

DFI 7000 DM

SIGNAL CONDITIONER/INDICATOR

USER’S GUIDE

www.cooperinstruments.com

PH: 540-349-4746 ● FAX: [phone]

CONTENTS

1.0 DESCRIPTION .......................................................................................................................1

2.0 SPECIFICATIONS..................................................................................................................1

3.0 INSTALLATION .....................................................................................................................2

3.1 Unpacking........................................................................................................................................ 2

3.2 Mounting the Unit............................................................................................................................2

3.3 Wiring...............................................................................................................................................2

3.3.1 Power ........................................................................................................................................2

3.3.2 Transducer................................................................................................................................2

3.3.3 Output .......................................................................................................................................3

4.0 INITIAL ADJUSTMENTS/SETUP ..........................................................................................3

4.1 Calibrating the DFI 7000 DM for Operation...................................................................................3

4.1.1 Zero Adjustment....................................................................................................................... 3

4.1.2 Gain and Phase Adjustment ...................................................................................................3

4.1.3 Operative Adjustments............................................................................................................4

4.2 Changing the Signal Polarity .........................................................................................................4

5.0 OPERATIVE ADJUSTMENTS ...............................................................................................4

5.1 Options ............................................................................................................................................4

5.2 Option Card Installation .................................................................................................................4

5.3 High/Low Limits Option.................................................................................................................. 4

5.3.1 Setting the Limits .....................................................................................................................5

5.3.2 Changing the Hysteresis .........................................................................................................5

5.4 Peak Detector Option .....................................................................................................................6

5.5 Track-and-Hold Option ................................................................................................................... 6

6.0 TROUBLESHOOTING GUIDE ...............................................................................................6

7.0 WARRANTY REPAIR POLICY ..............................................................................................7

CF 72 DFI 7000 DM ii May 1996 Rev. A

1.0 DESCRIPTION

The 7000 DM is a complete 4-1/2-digit signal conditioner/indicator for LVDTs or VRTs. The unit is housed in a 1/8
DIN case and utilizes screwdriver-type power and I/ O connectors. It also provides adjustments for zero, gain,
phase, and scaling. The DM features a +/-5 volt output along with a wide input range. The options are Dual Limits,
Peak Detector, or Track-and-Hold.

2.0 SPECIFICATIONS

GENERAL

#Channels 1
Case Material Noryl Plastic
Temperature, Storage -20° F to 200° F
Temperature, Operating 0° F to 130° F

TRANSDUCER INTERFACE

Transducer Excitation 5KHz
Type of inputs accepted LVDT, VRT
Transducer Current Drive 100 mA
Input Gain Range <1 to 300
Calibration Method Manual Displacement
Zero Balance +/-15% F.S. Min.
Noise & Ripple <300 microvolts
Transducer Min. Imp. 7 ohms

AMPLIFIER CHARACTERISTICS

Full-Scale Output +/- 5 Volts
Output Impedance <2 ohms
Accuracy +/-0.2%
Frequency Response 300 Hz.
Common Mode Rejection 60 db.
Fine Span Adjust >+/-15%
Coarse Span Adjust >80%
Fine Zero Adjust >+/-15%
Coarse Zero Adjust >+/-20%
Short Circuited Protected Yes

DIGITAL DISPLAY

# Char. Displayed 4-1/2
Conversions per sec. 3
Scaling +/-19999
Scaling Method Potentiometer
Polarity Indication "-" For Negative
Decimal Pt. Selection Jumper (non-solder)
Display Size 0.56"
Overrange Indication Flashing Display
Resolution 1/20000
Type LED

PHYSICAL

Input/Output Connector Screwdriver Terminals

CHARACTERISTICS

Weight 2 lbs.
Mounting Bench, Panel, or Rack

CF 72 DFI 7000 DM 1 May 1996 Rev. A