Manuals / Brands / Computer Equipment / Network Card / a/d/s/ / Computer Equipment / Network Card

a/d/s/ iSeries 2.3.3 Two/Three/Four-Wire RTD, Figure 2.5 a) RTD-1000 ohm and b) RTD-100 ohm Wiring Hookup 500 ohm Wiring Hookup

1 69

Download 69 pages, 1.03 Mb

9

2.3.3 Two/Three/Four-Wire RTD

The figures below show the input connections and input connector jumpers

(shown in bold lines) required to hookup a 2-, 3- or 4-wire RTD.

Figure 2.5 a) RTD-1000 ohm and b) RTD-100 ohm Wiring Hookup 500 ohm Wiring Hookup

The two-wire connection is simplest method, but does not compensate for

lead-wire temperature change and often requires calibration to cancel lead-wire

resistance offset.

The three-wire connection works best with RTD leads closely equal in

resistance. The device measures the RTD, plus upper and lower lead drop

voltage and the subtracts twice the measured drop in the lower supply current

lead producing excellent lead-resistance cancellation for balanced

measurements.

The four-wire RTD hookup is applicable to unbalanced lead resistance and

enables the device to measure and subtract the lead voltage, which produces

the best lead-resistance cancellation.

When configuring your controller, select RTD Type andRTD value in the Input

Type menu (see Part 3).

If the input wires of the meter get disconnected or broken, it will display

+OPN “Input (+) Open” message except in case of 500/1000 Ω 2-wire

RTD. In this case the display shows -OPN “Input (-) Open” message.

For safety purpose you may want to set up your alarm to be triggered

when input is open. See Alarm 1 and 2 chapters for details.

2-WIRE

4-WIRE

3-WIRE

2-WIRE

4-WIRE

3-WIRE

Contents

Main In the U.S.A. and Canada: 1-800-NEWPORT In Mexico: (95) 800-NEWPORT Or call your local NEWPORT Office. NEWPORT Electronics,Inc. TABLE OF CONTENTS LIST OF FIGURES: LIST OF TABLES: NOTES, WARNINGS and CAUTIONS PART 1 INTRODUCTION 1.1 Description 1.2 Safety Considerations EMC Considerations 1.3 Before You Begin Page 2.2 Front Panel Connections Figure 2.2 Input and Output Connections Table 2.2 Connectors 2.3 Electrical Installation 2.3.1 Power Connections Figure 2.3 Main Power Connections Table 2.3 Fuse Requirement (see specifications) 2.3.2 Thermocouple Input Figure 2.4 Thermocouple Wiring Hookup Table 2.4 TC Wire Color Chart 2.3.3 Two/Three/Four-Wire RTD Figure 2.5 a) RTD-1000 ohm and b) RTD-100 ohm Wiring Hookup 500 ohm Wiring Hookup Page 2.3.6 Wiring Outputs Figure 2.8 a) Mechanical Relay and SSR b) Pulse Output Outputs Wiring Hookup Wiring Hookup Figure 2.9 Isolated Analog Output Wiring Hookup Figure 2.10 Snubber Circuits Wiring Hookup Figure 2.11 Typical Applications RC CIRCUIT VARISTOR C NC NO C NC NO Page PART 3 OPERATION: Configuration Mode 3.1 Introduction Table 3.1 Button Function in Configuration Mode a b c Page 3.2.1 ID Number 3.2.2 Set Points Page Input Type (Thermocouple) Input Type (RTD) Input Type (Process) 3.2.5 Reading Configuration Menu Figure 3.4 Flow Chart for Reading Configuration Menu Page Reading Configuration (If Process was selected) Table 3.2 Conversion Table 3.2.6 Alarm 1 Figure 3.5 Flow Chart for Alarm 1 Page Page Page 3.2.7 Alarm 2 Figure 3.6 Flow Chart for Alarm 2 3.2.8 Loop Break Time/Field Calibration Figure 3.7 Flow Chart for Loop Break Time/Field Calibration Page Page Page Page Page Page Page Page 3.2.10 Analog Output (Retransmission) Figure 3.9 Flow Chart for Analog Output (Retransmission) Page 3.2.11 Ramp & Soak Figure 3.10 Flow Chart for Ramp and Soak Page 3.2.12 ID CODE Figure 3.11 Flow Chart for ID Code Page Page Page Page Page Page Page 3.2.14 DISPLAYCOLOR SELECTION Figure 3.13 Flow Chart for Display Color Selection Page Page PART 4 SPECIFICATIONS Page Page J K T E R S B C N L RTD Table 4.1 Input Properties PART 5 FACTORY PRESET VALUES Table 5.1 Factory preset value Page PART 6 CE APPROVALS INFORMATION Page Page Page Warranty/Disclaimer Return Requests/Inquiries