RMG TERZ 94 User manual

Reliable Measurement of Gas

Electronic Turbine Meter TERZ 94

OPERATING INSTRUCTIO

NS

STATUS: 2017 November, 20

th

Version: 09a

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Manual TERZ 94 · EN09a · 2017-11

Manufacturer

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Original Document

The manual TERZ94_manual_en_09a from 2017

November, 20

th

for the electronic gas meter TERZ 94 is

the document translated first from the German original

version. Anyhow, this document may serve as reference

for translations into other languages. Please use in case

of any uncertainties the German version as main

reference.

Note

Unfortunately, paper is not updated automatically,

whereas technical development continuously advances.

Therefore, we reserve the right to make technical

changes in regard to the representations and

specifications of these operating instructions. The latest

version of this manual (and other devices) can be

downloaded at your convenience from our Internet

home-page

www.rmg.com

.

Date create

July

20

09

1

st

revision ate

January

201

1

…

9

th

revision ate

Febr

uary

2015

9

th

a

revision ate

2017 November, 20

th

Document version an

language

Document

version

TERZ94_manual_en_09a

2017 November, 20

th

Language

EN

CONTENTS

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Manual TERZ 94 · EN09a · 2017-11

INTRODUCTION .................................................................................. 1

FUNCTIONAL DESCRIPTION .............................................................. 2

Construction............................................................................................................ 2

Meter head ..............................................................................................................

Block diagram .........................................................................................................

SAFETY INSTRUCTIONS ..................................................................... 6

Instructions for the installer .................................................................................. 7

Marking ....................................................................................................................... 7

Use .............................................................................................................................. 7

Installation or remo al ................................................................................................. 8

Installation ................................................................................................................... 8

Commissioning ............................................................................................................ 8

Ser icing and maintenance .......................................................................................... 8

Modifications to the product ........................................................................................ 8

INSTALLATION ................................................................................... 9

Operating conditions .............................................................................................. 9

Permissible types of gases ........................................................................................... 9

Permissible temperature ranges ................................................................................... 9

Pressure loss ........................................................................................................... 9

Installation ............................................................................................................ 10

Seals ......................................................................................................................... 11

Screws ...................................................................................................................... 12

Meter head ............................................................................................................ 1

Electrical connections .......................................................................................... 1

Earthing ..................................................................................................................... 15

Cables ....................................................................................................................... 16

Cable glands .............................................................................................................. 17

Installing the remote totalizing unit .................................................................... 18

START-UP ......................................................................................... 19

Connecting the gas flow ....................................................................................... 19

Initializing the totalizing unit ................................................................................ 19

OPERATION ...................................................................................... 20

Display ................................................................................................................... 20

Programming ......................................................................................................... 22

Principle of programming ........................................................................................... 24

Display alues ............................................................................................................ 24

Parameters and Modes of the TERZ 94 / 94-S ................................................... 25

CONTENTS

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Manual TERZ 94 · EN09a · 2017-11

1. Meter factor (pulse alue) TERZ 94 / 94-S ............................................................. 25

2. LF pulse scaler ....................................................................................................... 26

3. Configuration ......................................................................................................... 27

4. Pulse comparator ................................................................................................... 29

5. Flow rate at 4 mA .................................................................................................. 29

6. Flow rate at 20 mA ................................................................................................ 29

7. Current default alue (calibration current) .............................................................. 29

8. Current output mode ............................................................................................. 30

9. Current damping .................................................................................................... 30

10. Correction factors for current offset and current rise ........................................... 30

POWER SUPPLY ............................................................................... 1

MAINTENANCE ................................................................................. 2

Lubrication ............................................................................................................ 2

Changing the battery ............................................................................................

SPECIFICATIONS .............................................................................. 4

Measuring range ................................................................................................... 4

Measuring error .................................................................................................... 4

Temperature ranges ............................................................................................. 4

Inputs and outputs ............................................................................................... 4

Sensor input S1 (Measuring input) ............................................................................ 34

Sensor input S2 (Comparati e input or start/stop/reset) .......................................... 35

HF output .................................................................................................................. 35

LF output ................................................................................................................... 36

Alarm output .............................................................................................................. 36

Vo or RS-485 data interface ....................................................................................... 37

Temperature input (hardware and software options) .................................................. 38

Current-loop connection (TERZ 94-S only!) ................................................................. 38

Data for the use in hazardous areas: .......................................................................... 38

Materials used for the meter case ....................................................................... 8

Examples of connection ....................................................................................... 9

Battery-operated de ice ............................................................................................. 39

Main-powered de ice (Ex design) ............................................................................... 40

Main-powered de ice (Non-Ex design) ........................................................................ 41

ANNEX .............................................................................................. 42

Overview of Parameters for the TERZ 94/94-S .................................................. 42

Standard Parameters (values set in the factory) up to DN 150 ........................ 4

Fault and Event Display (coordinate A09) ........................................................... 45

Reset ...................................................................................................................... 46

Booting .................................................................................................................. 46

Matrix of the TERZ 94 / 94-S ............................................................................... 47

CONTENTS

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Manual TERZ 94 · EN09a · 2017-11

TERZ 94 Button Assignments ............................................................................... 48

Converting the TERZ 94 into the TERZ 94-S ........................................................ 49

INTRODUCTION

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Manual TERZ 94 · EN09a · 2017-11

1

Introduction

The TERZ 94 / 94-S turbine meter complements the RMG TRZ 03, TRZ 03-L and TRZ 03 K turbine

meters (see RMG Publication Nos. 3.161-E and 3.171-E).

The TERZ 94 / 94-S directly measures the flow rate at measurement conditions and integrates the

measured alues, so that, as a result, the gas olume which flowed through the meter is registered

by an electronic totalizing unit. The gas flow dri es a turbine wheel whose speed is recorded

through non-contact measurement by a sensor. Therefore, the meter is characterized by long-term

stability and low wear.

The TERZ 94 / 94-S is pro ided with HF and LF outputs which allow the de ice to be used as a flow

transducer for control applications and remote transmission.

Features

− For secondary applications

− With electronic totalizing unit

− Flow display

− Display of maximum flow alues

− Alarm output

− Detachable meter head (for use as a remote totalizer)

− Digital transmission of meter readings

The two ariants TERZ 94 and TERZ 94-S differ in the following features:

TERZ 94

− Battery operation

− Electronic suppression of the slow-down effect of the turbine wheel after flow stop by

external shut-down of the totalizer

TERZ 94-S

− External power supply

− 4-20

mA current output for outputting the flow rate

FUNCTIONAL DESCRIPTION

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Manual TERZ 94 · EN09a · 2017-11

2

Functional Description

Construction

Part Designation Material

1 Meter head

2 Set screw Steel

3 Sensor WF01 (1-channel) or WF02 (2-channels)

4 Permanent magnet Oerstit 500

5 Lubricator (from DN 200)

6 Radial ball bearing Nirosta steel

7 Turbine wheel Delrin / aluminium

8 Flow straightener Hostaform

9 O-ring

10 Sensor slee e with sensor Nirosta steel

11 O-ring 8x2.5 83FKM592

1

11

2

3

10

9

8

4

7 6 5

FUNCTIONAL DESCRIPTION

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Manual TERZ 94 · EN09a · 2017-11

3

The TERZ 94

/

94-S olumeters form a series of uniform construction.

The meters consist of the following principal components:

- meter case

- measuring element (with turbine wheel and sensor) and

- electronic totalizing unit.

An aerodynamic flow straightener (8) fitted into the meter case constricts the effecti e cross

section of the pipe to form a ring-shaped cross-sectional area and substantially eliminates

turbulences. The elocity of the flowing gas increases and the gas is directed to the turbine blades.

The turbine wheel (7) is dynamically balanced and mounted with dust-proof ball bearings (6). A

permanent magnet (4) located at the end plate of the turbine shaft induces the sensor element (3)

to gi e a oltage pulse with each rotation of the turbine wheel. This pulse is further processed by

the electronic system of the meter head (1).

Meter head

Inside the meter head, the number of pulses is di ided by the meter factor (number of pulses per

m3) and the result is used to calculate the olume at measurement conditions. In the main totalizer,

the sum of the olume at measurement conditions which flowed through the meter is formed and

you can read the gas olume which flowed through the meter per time unit on the flow rate display.

At the HF output, the unchanged signal frequency of the sensor element is outputted, whereas, for

the LF output, this HF frequency can be reduced by two programmable scaling factors.

Block diagram

TERZ 94

In the display field of the TERZ 94 (not with the TERZ 94-S), a start-stop totalizer or a resettable

totalizer can be optionally displayed. Through the free sensor input X5, either the olume metering

of the start-stop totalizer is interrupted or the resettable totalizer is reset (depending on the

programming of the TERZ 94).

FUNCTIONAL DESCRIPTION

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Manual TERZ 94 · EN09a · 2017-11

4

TERZ 94-S

The TERZ 94-S olumeter has a current-loop connection (X2_0 with current module TERZ94trm)

which ser es as power supply and 4 to 20 mA current output at the same time. For this purpose, a

power supply unit is required which is to be connected to this output.

The TERZ 94-S cannot be battery-operated.

TERZ 94 1-channel

Channel 1

Start/Stop

Reset

1

K

12345678 m3

HF output

LF output

1

n

f

i

Current output

1

n

Alarm contact

Option:

EZD or RS485 interface

RMG TERZ 94 User manual

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