DCM 492
UNIVERSAL IN-LINE TRANSDUCER AMPLIFIER
3-WIRE CURRENT
USER’S GUIDE
www.cooperinstruments.com
PH: 540-349-4746 • FAX: 540-347-4755
CONTENTS
1.0 INTRODUCTION ....................................................................................................................1
1.1 Overview ...........................................................................................................................................1
1.2 Specifications....................................................................................................................................1
1.3 Layout ...............................................................................................................................................1
2.0 INSTALLATION / SET UP......................................................................................................1
2.1 Wiring................................................................................................................................................1
2.2 Setup.................................................................................................................................................2
2.3 Panel Mounting Template .................................................................................................................3
3.0 CALIBRATION .......................................................................................................................3
3.1 Calibration.........................................................................................................................................3
3.2 Using Shunt Calibration ....................................................................................................................3
4.0 WARRANTY REPAIR POLICY ..............................................................................................4
CF50 ii V-3/02 Rev. B
1.0 INTRODUCTION
1.1 Overview
The Cooper Universal Inline Amplifier is housed in a small plastic package, which is connected between the
transducer and a readout instrument. The amplifier supplies a highly regulated bridge excitation voltage for the
transducer and converts the millivolt signal of the transducer to a 4-20 mA signal. The Universal Inline Amplifier
features include two selectable excitation voltages, programmable gain settings, a wide adjustment range on the
zero and a buffered solid-state shunt cal relay for quick calibration.
1.2 Specifications
Power Requirements 18-32 volts DC
Bridge Excitation 5 or 3 volts DC @ 70ma (User selectable)
Output current range 4 to 20 mA (“zero output” can be set at 12 ma for bipolar input signals)
Frequency response DC - 5000 Hz
Zero Balance range ± 70% coarse, ± 25% fine adjustment range
Gain Adjustment Range Switch selectable (0.5 to 6.6 mV/V), ± 25% fine adjust
Short circuit protected (+) Output to (-) Common
Environment Protection IP-66 or NEMA 4
Shunt calibration Solid State Relay
Long Term Zero Drift .1% of Full Scale per 6 months
1.3 Layout
CAUTION--DO NOT CONNECT PIN 2 TO ANY VOLTAGE (INTERNAL REFERENCE)
2.0 INSTALLATION / SET UP
2.1 Wiring
The Universal In-Line Amplifier can be powered from a 18 to 32 volt single voltage supply. The following diagrams
show the wiring to the supply and readout.
Cables should be stripped back 3 inches with the wires stripped and tinned 1/2 inch. Connections to the terminal
block are made by pressing the orange levers and inserting the wires into the hole next to the levers. The terminal
block will accept wire up to AWG 20.
Install a shunt cal resistor with the value specified on the transducer data sheet.
CF50 1 V-3/02 Rev. B
Fig. 1-1. Layout of In-line Amplifier
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