Contrec 202D Manual de usuario

202D-M-V3.1

FIELD MOUNTED

RATE TOTALISER

MODEL 202D

June 2017

202D-M-V3.1

IMPORTANT NOTICE

To preserve battery life, the batteries may have been

disconnected and may need to be reconnected. To do this

follow the steps outlined in section 9.3.

There are two battery packs (see the diagram in section 9.4)

and both packs must be connected.

202D-M-V3.1

CONTENTS

1. Introduction 1

1.1 Model Number Designation 3

1.2 Intrinsic Safety Approvals 4

2. Specification 6

3. Operation 8

3.1 Display 8

3.2 Test Mode 9

3.3 Filtering 10

3.4 Calculation of Rate and Total 12

3.5 Total Conversion 13

3.6 Frequency Cutoff 13

3.7 Linearisation 14

4. Programming 15

4.1 Program Steps 16

5. Example 19

6. Versions 20

6.1 Battery Powered Version 21

6.2 DC Power Version 22

6.3 Relay and 4-20mA Output Version 24

7. Flowmeter Input 26

8. Intrinsic Safety Connections 31

8.1 Coils 31

8.2 Simple Apparatus 32

8.3 Namur Proximity Switches 32

8.4 4-20mA Output 34

8.5 Alarm Outputs 36

9. Installation 38

9.1 Wall Mounting 38

9.2 Panel Mount Version 39

9.3 Removing the Front Panel 40

9.4 The Main Electronics 42

9.5 Wiring 43

9.6 Maintenance 43

9.7 Terminal Designations 44

Index

202D-M-V3.1

Introduction 1

1. INTRODUCTION

The Model 202Di Rate Totaliser is a microprocessor based instrument

which accepts a frequency or pulse input from a wide range of

flowmeters. The instrument displays flow Rate, a Resettable Total and

an Accumulated Total directly in engineering units.

The instrument is compatible with a wide range of flowmeters including

turbine, paddlewheel and positive displacement flowmeters.

Three different versions of the Model 202Di are available:

1. A Battery Powered Version with no output.

2. A DC Powered Version with either:

i. high and low flow alarms or

ii. a low flow alarm and pulse output.

3. A Loop Powered Version with 4-20mA output and alarms as above.

The instrument is fully programmable from the front panel; the user can

program scaling factors, decimal point positions, filter constants and timebase.

The Model 202Di Rate Totaliser conforms to the EMC-Directive of the Council of

European Communities 2014/30/EU, the LVD directive 2014/35/EU and the

following standards:

EN61326:2013 Electrical equipment for measurement, control

and laboratory use – EMC requirements :

Residential, Commercial & Light Industry

Environment & Industrial Environment.

EN61010:2010 Safety requirements for electrical equipment for

measurement, control, and laboratory use.

In order to comply with these standards, the wiring instructions in Section 9.5

must be adhered to.

202D-M-V3.1

Introduction 2

The following improvements have been made in the Model 202D:

ŸThe 202D output board can have both ALARMS and a 4-20mA OUTPUT.

ŸThe voltage drop across the alarm outputs in the 202D is ONLY 0.8 VOLTS.

ŸThe voltage supply for the DC and loop powered versions can go AS LOW

AS 9 VOLTS.

ŸThe 202D has an overall LOWER CURRENT CONSUMPTION than the

previous model with an IMPROVED BATTERY LIFE - the battery life in

the new model is typically 5 years regardless of the time the unit

spends in totalising mode.

ŸIn the 4-20mA output version of the 202D, the ACCURACY HAS BEEN

IMPROVED to 0.05% of span and the linearity to 0.05% of span at

25°C.

ŸThe millivolt input can accept signals AS LOW AS 15mV P-P.

ŸThe 202D has a WIDE FREQUENCY RANGE - 0.01Hz to 10kHz.

ŸThe 202D has a WIDER K-FACTOR RANGE - K-factors from 0.000001 to

999,999 can be programmed.

ŸFlowmeter Linearisation up to 10 points is now standard.

ŸUnlike the previous Model 202, the 202D has an additional mounting

option - it is available in a PANEL MOUNT version.

202D-M-V3.1

Introduction 3

1.1 MODEL NUMBER DESIGNATION

The Model Number of the 202Di describes the power & output options

installed and the mounting options.

Model 202Di . 2 3 C

Mounting options Version

0 No holes drilled for cable entry 0

Battery powered version

1Panel mount

2Wall mount (standard) 3DC powered with battery backup

4Turbine adaptor and alarm outputs

62" pipe mount (galvanised)

4Loop powered with 4-20mA

output, alarm outputs and backup

batteries

Approvals

CCSA USA/Canada approval

M ATEX/IECEx Approval

202D-M-V3.1

Introduction

1.2 INTRINSIC SAFETY APPROVALS

The Model 202Di is certified for use in hazardous areas and has IECEx, ATEX

and CSA US /C approvals.

The Model 202Di certification details are:

IECEx Approval IECEx BVS 15.0099X

Rating Ex ia IIB T4 Gb

ATEX Approval BVS 15 ATEX E 106 X

Rating II 2G Ex ia IIB T4 Gb

Ambient Temperature: Maximum ambient temperature of 60°C.

CSA NRTL/C Approval LR 104 840-5.

Type: Class 1, Groups C and D.

When installing in hazardous areas, the instrument must be installed

according to the guidelines in Section 2 and in accordance with standards for

wiring and installation in hazardous areas.

4-20 mA/DC Power

The input can be connected to IS circuits with the following maximum

values:

Ui = 28V

Ii = 93mA

Pi = 653mW

The internal capacitance and inductance seen on these terminals is 0.1uF

and 0mH.

202D-M-V3.1

Introduction 5

Relay Outputs

The outputs can be connected to IS circuits with the following

maximum values:

Ui = 28V

Ii = 93mA

Pi = 653mW

The internal capacitance and inductance seen on these terminals is 0.1uF

and 0mH.

Flowmeter Input

Entity parameters on the flowmeter enable connection to a wide

range of approved sensors.

Input parameters are:

Ui = 24V

Ii = 20mA

Pi = 320mW

The internal capacitance and inductance seen on these terminals is 0.02uF

and 0mH.

Output parameters are:

Uo = 10.0V (open circuit)

Io = 9.0mA (short circuit)

Po = 23mW

Maximum allowed external capacitance is 20µF.

Maximum allowed external inductance is 1.5H.

202D-M-V3.1

Specification

2. SPECIFICATION

General

Display: LCD which is continuously powered.

Resettable Total: 7 digits with 10mm (0.4") high digits. Resettable

from front panel.

Accumulated Total: Displayed when the ACCUM TOTAL button is

pressed.

Rate: 4½ digits with 8.5mm (0.33") high digits.

K-factor: The pulses per unit of measure (eg. pulses/gallon)

is programmable in the range 0.000001 to

999,999.

Calibration up to ten user selected points.

Decimal Points: Decimal point positions are fully programmable for

both rate and total.

Timebase: Rate can be displayed in units per second, minute,

hour or day.

Frequency Range: 0.01Hz to 10kHz.

Signal Type: Link settable for sinewave (15mV P-P minimum),

open collector, reed switch, pulse or Namur

proximity switch.

Battery Powered Version

Type: Two lithium battery packs.

Battery Life: 5 years typical.

Loop Powered 4-20mA Output Version

Scale: The 4mA and 20mA points are programmable.

Resolution and Linearity: 0.05% of span.

Accuracy: 0.05% of span at 25°C.

0.1% (typ) of span, full temperature range.

Update Time: 0.5 second.

Connection: Two-wire.

Loop Power Supply: 9-28 Volts.

Supply Backup: Lithium battery.

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