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Contrec 202D User Manual

Contrec 202D
49 pages
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202D-M-V3.1
FIELD MOUNTED
RATE TOTALISER
MODEL 202D
June 2017
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Contrec 202D Specifications

General IconGeneral
DisplayLCD
Operating Temperature Range-20°C to +60°C
Output Signal4-20 mA
Enclosure RatingIP65
InputsAnalog, Pulse
OutputsAnalog, Pulse, Relay
Accuracy±0.1%

Summary

Introduction

Intrinsic Safety Approvals

Details the IECEx, ATEX, and CSA certifications for hazardous area use.

Specification

Operation

3.4 CALCULATION OF RATE AND TOTAL

Explains the formula for calculating flow rate (R = f x H / S) and defines terms.

Programming

4.1 PROGRAM STEPS

Lists and describes the various CAL steps (0-18) used for programming parameters like pulse output, scaling, and alarms.

Versions

6.1 BATTERY POWERED VERSION

Describes the features and operation of the battery-powered model without external power sources.

Intrinsic Safety Connections

8.1 COILS

Details connection requirements for Intrinsically Safe (IS) coils or sensors used with the device.

8.2 SIMPLE APPARATUS

Explains that devices like reed switches classified as "simple apparatus" can be connected without certification.

8.3 NAMUR PROXIMITY SWITCHES

Provides connection guidelines and maximum input parameters for certified Namur proximity switches.

8.4 4-20mA OUTPUT

Outlines safety parameters for connecting the 4-20mA analog output to certified devices via a barrier.

8.5 ALARM OUTPUTS

Describes connecting low/high alarm or pulse outputs to certified devices, emphasizing independent IS circuits and barriers.

Installation

SPECIAL CONDITIONS FOR SAFE USE

Outlines specific conditions for ATEX/IECEx certification, including mounting requirements for electrostatic safety.

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