RMG TERZ 94 Operating Instructions Manual

OPERATING INSTRUCTIO

NS

Electronic Turbine Meter TERZ 94

Reliable Measurement of Gas

STATUS: 2017 November, 20th
Version: 09a

...............................................................................................................................................................................................................

Manufacturer

Our customer service is available for technical queries

D-35510 Butzbach

Telefon

switchboard

[phone]

– 0

Telefon service

[phone]

– 127

Telefon spar

e parts

[phone]

– 173

Fax [phone]

– 130

E-

mail

[e-mail]

reference.

www.rmg.com

.

Date created

July

2009

1st

revision date

January

2011

…

9th

revision date

Febr

uary

2015

9th a revision date

2017 November, 20

language

version

2017 November, 20

Language

EN

Address RMG Messtechnik GmbH

Otto-Hahn-Straße 5

Original Document The manual TERZ94_manual_en_09a from 2017

November, 20th 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

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

th

Document version and

Document

TERZ94_manual_en_09a

th

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Manual TERZ 94 · EN09a · 2017-11

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CONTENTS

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

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

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

Meter head .............................................................................................................. 3

Block diagram ......................................................................................................... 3

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

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

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

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

Installation or removal ................................................................................................. 8

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

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

Servicing 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 ............................................................................................................ 13

Electrical connections .......................................................................................... 13

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 values ............................................................................................................ 24

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

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CONTENTS

1. Meter factor (pulse value) 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 value (calibration current) .............................................................. 29

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

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

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

POWER SUPPLY ............................................................................... 31

MAINTENANCE ................................................................................. 32

Lubrication ............................................................................................................ 32

Changing the battery ............................................................................................ 33

SPECIFICATIONS .............................................................................. 34

Measuring range ................................................................................................... 34

Measuring error .................................................................................................... 34

Temperature ranges ............................................................................................. 34

Inputs and outputs ............................................................................................... 34

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

Sensor input S2 (Comparative 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 ....................................................................... 38

Examples of connection ....................................................................................... 39

Battery-operated device ............................................................................................. 39

Main-powered device (Ex design) ............................................................................... 40

Main-powered device (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 ........................ 43

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

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

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

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

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CONTENTS

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

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

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INTRODUCTION

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 values, so that, as a result, the gas volume which flowed through the meter is registered
by an electronic totalizing unit. The gas flow drives 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 provided with HF and LF outputs which allow the device 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 values

− Alarm output

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

− Digital transmission of meter readings

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

TERZ 94

1

− 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

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FUNCTIONAL DESCRIPTION

Functional Description

Construction

2

1

11

10

2

9

3

8

4

7 6 5

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 sleeve with sensor Nirosta steel
11 O-ring 8x2.5 83FKM592

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FUNCTIONAL DESCRIPTION

The TERZ 94 / 94-S volumeters 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 effective cross

3

section of the pipe to form a ring-shaped cross-sectional area and substantially eliminates
turbulences. The velocity 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 give a voltage 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 divided by the meter factor (number of pulses per
m3) and the result is used to calculate the volume at measurement conditions. In the main totalizer,
the sum of the volume at measurement conditions which flowed through the meter is formed and
you can read the gas volume 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 volume metering
of the start-stop totalizer is interrupted or the resettable totalizer is reset (depending on the
programming of the TERZ 94).

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TERZ 94 1-channel

12345678 m3

HF output

LF output

1

n

f

i

Current output

Alarm contact

Option:

EZD or RS485 interface

4

FUNCTIONAL DESCRIPTION

TERZ 94-S

The TERZ 94-S volumeter has a current-loop connection (X2_0 with current module TERZ94trm)
which serves 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.

Channel 1

1

Start/Stop

Reset

K

1

n

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TERZ 94 2-channel

1

K

12345678 m3

HF output

LF output

1

n

f

i

Current output

Alarm contact

Option:

EZD or RS485 interface

Channel 1

With 2 channels:

pulse

Channel 2

monitoring

10 / 10000

180 °

FUNCTIONAL DESCRIPTION

5

1

n

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SAFETY INSTRUCTIONS

Safety Instructions

The TERZ 94 / 94-S volumeter is used for measuring the volume at measurement conditions of
non-corrosive gases and fuel gases. Measurement of corrosive gases is only permitted if the special
designs are used which have been developed for such purpose. These meters are not suitable for
measuring liquids, otherwise they will be destructed.

6

The TERZ 94 / 94-S complies with currently applicable standards and regulations. However, failure
to operate them properly may cause hazards.

Persons who install or operate the TERZ 94 / 94-S volumeter in areas subject to explosion hazards,
must be familiar with the currently applicable explosion protection standards and regulations.

The electronic totalizing unit of the explosion-protected design has been approved for use in areas
subject to explosion hazards and its code is:

II 2 G EEx ib[ia] IIC T3, T4

The appropriate certificate of conformity can be found in the annex and its reference number is:

TÜV 02 ATEX 1970

Please observe the following signs:

Danger of explosion

In the manual, this symbol warns you of an explosion hazard. Please observe the
instructions given next to this symbol. As to the danger of explosion, please note the
following in particular:

• Only the explosion-protected design of the TERZ 94 / 94-S may be used in areas

subject to explosion hazards. Connect the pulse outputs of these devices only to
intrinsically safe circuits.

• The battery must be changed in an area without explosion hazards.

• The specifications on cable type and cable length in this manual and in the ex-

approval must be observed.

• Modifications to the device make the Ex approval invalid and are therefore prohibited.

Damage to property

In the manual, this symbol warns you of possible damage to property. The instructions
given next to this symbol inform you about what you can do to avoid damage to the
TERZ 94 volumeter.

It is essential to observe the warning information in these operating instructions and the generally
applicable safety rules.
No warranty claims can be asserted if there is unauthorized interference with the device!

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SAFETY INSTRUCTIONS

Instructions for the installer

Marking

II 2 G Ex ib[ia] IIC T4 or T3

TÜV 02 ATEX 1970 / IECEx TUN 09.0002

Ta = -25°C ..... +40 / 60°C

For data, see the EG type examination certificate (see annex)

0044
0085

Manufacturer

RMG Messtechnik GmbH
Otto-Hahn-Straße 5
D-35510 Butzbach (Germany)

Use

Device type Description

7

TERZ 94*** Volumeter
EA **** Volumeter
EZ **** Volumeter
TRZ 03-*** Turbine meter
ENCO-* Encoder index
EC 21 Temperature corrector
EC 24 Volume corrector
TEC 21 Volumeter + temperature corrector
TEC 24 Volumeter + volume corrector
ETC **** Volumeter + temperature corrector
EVC **** Volumeter + volume corrector

This device is an apparatus for areas subject to explosion hazards.

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SAFETY INSTRUCTIONS

Installation or removal

When installing the device, care must be taken that the degree of protection of the casing is
complied with. Exposure to direct sunlight has to be avoided.
When removing the device, de-energize the signal circuits connected and remove the relevant
cables properly.

8

Installation

If one or more than one signal circuit is used, make sure when choosing the cables that the
permissible limits as per the EC type examination certificate are not exceeded.
Each explosion-protected signal circuit has to be installed in a separate cable which is to be taken
through the relevant high-strength cable gland.
It is absolutely necessary that the intrinsically safe cables are permanently installed.
Make sure that the connecting cables are provided with wire-end sleeves.

Commissioning

Before commissioning this equipment, make sure that all lines have been correctly installed and
connected in the terminal compartment.
The casing must be completely closed.

For installation and commissioning, the IEC 60079-14 of 2004 / EN 60079-14 of 2006 standard
has to be complied with.
National norms and/or regulations also need to be taken into consideration.

Servicing and maintenance

The battery may only be changed in a non-incendive area.
This device may be repaired only by RMG Messtechnik.

Modifications to the product

Changes or modifications made to this product by unauthorized persons may lead to incorrect
malfunctions and are prohibited for safety reasons! In this case the [ATEX] approval will be no
longer valid.
This device may be repaired only by RMG Messtechnik!

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INSTALLATION

Installation

Operating conditions

Permissible types of gases

The standard design of the TERZ 94 or TERZ 94-S can be used for all non-corrosive gases, such as

Natural gas Air
Town gas Argon
Methane Helium
Ethane Carbon dioxide (dry)
Propane Nitrogen
Butane Hydrogen

Special designs (PTFE lining, special lubrication, special material, etc.) can be used for corrosive
and humid gases, such as

Ethylene Digester gas
Biogas Sulphur dioxide
Acid gas etc.

Permissible temperature ranges

9

For the standard design, the following fluid temperature and ambient temperature ranges are
permitted:

Fluid temperature range: -10°C to +50°C
Ambient temperature range: -20°C to +60°C resp. +40°C

Pressure loss

The pressure loss is calculated using the following formula:

2

Q

Z=p ⋅ρ⋅∆

P

where
∆p is the pressure loss [mbar]
ZP is the pressure loss coefficient

ρ is the density [kg/m3]
QM is the flow rate at measurement conditions [m3/h]
DN is the nominal diameter of the meter [mm]

DN

M

4

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INSTALLATION

The pressure loss coefficient ZP is constant for all volumeters of the types TERZ 94 and TERZ 94-S.
It is:

10

Z

= 5040

P

This is an approximate mean value. The exact value is calculated from the pressure loss which is
determined on testing the volumeter.

Example of calculation:

QM = 650 m3/h; DN 150; ρ = 1.3 kg/m3 [natural gas, 600 mbar]

2

Q

mbar5.5

Z=p

P

DN

M

4

3.15040

650

150

2

=⋅⋅=⋅ρ⋅∆

4

Therefore, the pressure loss ∆p with a volumeter of the type TERZ 94 is 5.5 mbar in this case.

Installation

The gas flow must be free of shocks and pulsations as well as free of foreign particles, dust and
liquids. Any components affecting the gas flow must absolutely be avoided directly upstream of the
TERZ 94 volumeter.

To achieve the highest possible accuracy (measuring error <1%), an inlet pipe of 2 DN in length with
a perforated-plate straightener should be installed upstream of the meter.

You can install the meters in any position (vertical or horizontal) up to and including the nominal
diameter of DN 200. From the nominal diameter of DN 250, only the position stated in the
purchase order is possible.

When you install the volumeter, please observe the direction of flow indicated on the case!

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INSTALLATION

Seals

It must be guaranteed that flange seals of RMG turbine meters do not protrude from the flange into
the gas line.

All seals approved as per DVGW can be used depending on the requirements for stability and reli­ability.

We recommend seals with the following maximum material characteristic values according to the
AD2000 rules:

− gaskets: k

x KD = 20 x bD | k1 = 1.3 x bD [N/mm]

0

− grooved seals: k0 x KD = 15 x bD | k1 = 1.1 x bD [N/mm]

− spiral seals: k0 x KD = 50 x bD | k1 = 1.4 x bD [N/mm]

− octagonal ring joint seal: KD = 480 N/mm2

For recommended dimensions, see the tables below.

d1

d2

1.5 up to 5 mm

Gaskets

DN d1 d2

50 2" 77 107 107 105 107 107

80 3" 90 142 142 137 142 142
100 4" 115 162 162 175 168 168
150 6" 169 218 218 222 225 225
200 8" 220 273 273 279 285 292
250 10" 274 328 330 340 342 353
300 12" 325 378 385 410 402 418
400 16" 420 490 497 514 515 547
500 20" 520 595 618 607 625 628
600 24" 620 695 735 718 730 745

PN 10 PN 16 ANSI 150 PN 25 PN 40

Grooved seals

DN d1 d2 d1 d2
50 2" 69,8 88,9 65 87
80 3" 98,4 123,8 95 121

100 4" 123,8 154,0 118 144
150 6" 177,8 212,7 170 204
200 8" 228,6 266,7 220 258
250 10"
300 12"
400 16"
500 20"
600 600

ANSI 300 / ANSI 600 PN 64

282.6 320.7 270 315

339.7 377.8 320 365

422.3 466.7 426 474

530.2 581.0 530 578

631.8 682.6 630 680

11

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Spiral

seals

Screw bolts complying

ASTM A320 Grade L7,

INSTALLATION

ANSI 300 PN 64 ANSI 600

DN d1 d2 D1 d2 d1 d2

50 2" 69.9 85.9 66 84 69.9 85.9

80 3" 101.6 120.7 95 119 101.6 120.7
100 4" 127.0 149.4 120 144 120.7 149.4
150 6" 182.6 209.6 174 200 174.8 209.6
200 8" 233.4 263.7 225 257 225.6 263.7

12

250 10" 287.3 317.5 279 315 274.6 317.5
300 12" 339.9 374.7 330 366 327.2 374.7
400 16" 422.4 463.6 426 466 412.8 463.6
500 20" 525.5 577.9 530 574 520.7 577.9
600 24" 628.7 685.8 630 674 628.7 685.8

Screws

Temperature ranges for screws and nuts

-10°C to +80°C -40°C to +80°C
Pressure Variant 1 Variant 2 Variant 3
up to and

including
40 bar

from 40 bar

Screws complying
with
DIN EN ISO 4014
made of material 5.6,

Nuts complying with
DIN EN ISO 4032
made of material 5-2

with
ANSI B1.1
made of material
ASTM A193 Grade B7,

Nuts complying with
ANSI B1.1
made of material
ASTM A194 Grade 2H

Screws complying
with
DIN EN ISO 4014
made of material
25CrMo4,

Nuts complying with
DIN EN ISO 4032
made of material
25CrMo4

Screw bolts
complying with
ANSI B1.1
made of material

Nuts complying with
ANSI B1.1
made of material
ASTM A320 Grade L7

Screw bolts
complying with
ANSI B1.1
made of material
42CrMo4,

Nuts complying with
ANSI B1.1
made of material
42CrMo4

Anti-fatigue bolts
complying with DIN
2510
made of material
25CrMo4,

Nuts complying with
DIN 2510
made of material
25CrMo4

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1

2

PE (Abschirmung)

INSTALLATION

Meter head

The meter head (1) can be turned after the set screw (2) has been loosened. Turn the meter head
by max. 360°, otherwise the signal wires can become twisted and break.

You can install the meter head also vertically. To do this, you must proceed as follows:

• Unscrew the cover of the meter head.

• Disconnect the two wires from terminal X5 (remember the polarity!).

• Loosen the set screw (2). Now you can remove the case of the meter head and an aluminium

assembly part will appear.

• On the side of the case, there is a hole which is covered with a screw. Mount the retainer part

to this hole and close the hole in the rear panel by means of the screw.

• Thread the signal wires through the retainer part, place the meter head onto the turbine case,

turn it into the desired position and retighten the set screw (2).

• Connect the signal wires again to terminal X5 (make sure that the polarity is correct!) and screw

on the cover again.

13

Electrical connections

The LF and HF volume pulses and the alarm output are led out of the meter head by a 7-pin
connector (Binder). All other connections have to be made at the terminals on the board.

Standard connection TERZ 94 and TERZ 94-S:

4

5

6

PE (Screening)

3

1 - / 4 + LF signal
2 - / 5 + Alarm
3 - / 6 + HF signal

The supply/current-loop (TERZ 94-S only) is connected to the terminals X22 on the transmitter
board TERZ94trm.

In areas subject to explosion hazards, the TERZ 94 must only be connected to certified
intrinsically safe circuits.
Make sure that the limiting values from the conformity certificate (see appendix) for
the devices, which have to be connected, are not exceeded.

If one or more electric circuits are used, it is to ensure that with the cable selection the permissible
limiting values according to the EEC design inspection certificate are not exceeded.
Each ex signal circuit has to be wired in its own cable, which is to be led through the appropriate
cable gland.
A fixed installation of the intrinsically safe cables is mandatory.
The connecting cables have to be provided with core-end sleeves.

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Pulse inputs

Service module

configuratio

n of pulse inputs

Programming keys

INSTALLATION

To reach the electrical connections on the board, you must first remove the cover of the meter
head.

14

Plug X2_0

for current module

TERZ94trm and

Terminal block X4

Plug X3

Pin connector button on the case

Terminal X5

Erdungsschr

Jumpers X_S1 and X_S2 for

To convert from the meter head directly mounted on the meter case to the remote totalizing unit
and vice versa it is necessary to change the positions of some jumpers (see inputs and outputs in
the annex).

X_S1 X_S2 X_TERZ90
Meter head mounted on

3-5 and 4-6 3-5 and 4-6 all open
meter case
Remote totalizing unit 3-4 3-4 1-2 and 3-4
Start / stop totalizer 3-5 and 4-6 1-3 and 2-4 all open

TERZ 94:

Controlling the start-stop totalizer or resetting the resettable totalizer (depending on the
programming of the electronic totalizing unit) is performed through input X5 terminals 3 and 4.
As soon as input X5 terminals 3 / 4 has been short-circuited through an external contact,
interruption or resetting is performed.

⇒ For this purpose, set jumpers at the positions identified with XS 2 to the “reed contact” function.

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INSTALLATION

TERZ 94-S:

Before commissioning, the device
must be activated.
The jumper must be plugged as
shown in the drawing.

15

deactivated activated

In the case of the TERZ 94-S, terminal X22 (on current module TERZ94trm which is plugged in the
main card) is used as current-loop connection to supply the device and as output current (4­20 mA).

To connect cables to the spring terminals, you need a screwdriver with a blade width of a maximum
of 2.5 mm. Introduce the blade into the intended slot and press down the screwdriver to open the
spring terminal.

Earthing

To prevent measuring errors caused by electromagnetic interference, you must not fail to earth the
case of the meter head via the earthing screw on the left side of the case.

Minimum cable cross section:

up to a length of 10 m: 6 mm2
from a length of 10 m: 10 mm2

Earthing screw

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potential

measuring

station

station

-

0085

INSTALLATION

Thereby make sure that you have an electrical link between TERZ 94 and the piping, as it is shown
in the drawing below.

Outputs

16

24 VDC

potential
measuring

Current output 4-20mA yes no

equipotential bonding
line, min. 6 mm

P

IP65

2

Cables

Use 2-core or multicore shielded cables which are twisted together in pairs for the signal lines (LF
output, HF output, current-loop connection, control input). The shielding must always be connected
to earth on both sides. In the case of the TERZ 94, you must proceed as described in the chapter
“Cable glands”.

We recommend that cable cross sections between 0.25 mm2 and 0.5 mm2 are used. Due to the
cable gland, the outside diameter must be between 4.5 mm and 6.5 mm.

When the device is used in areas subject to explosion hazards, the maximum cable
length is limited by the limit values for intrinsically safe circuits and depends on the
inductance and capacitance of the cable!

In particular: The maximum cable length between the TERZ 94-S and the transmitter supply unit of
type KFD2-STC3-Ex1, in connection with the cable type LiYCY 2 x 0.75 mm2, is 250 m for the
current output.
You can also use other cable types, if the following cable values are not exceeded:
Capacitance < 200 nF/km inductance < 1 mH/km

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INSTALLATION

Cable glands

Clamp the shielding on both sides, as shown in the picture below, into the cable glands located on
the outside of the case:

• Unscrew the cap nut.

• Pull out the plastic clamping piece.

• Push the cable end through the cap nut and the clamping piece and bend the shielding

backwards.

• Put the clamping piece back into the connecting piece.

• Screw on the cap nut again.

17

Cap nut

Clamping piece

O-ring

Connecting piece

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Sensor

Sensor

Zählwerk

Zählwerk

Index Input

Index Input

-

+

Sensor

Sensor

Zählwerk

Zählwerk

Index Input

Index Input

-

+

S1S2S4

4

5

1

2

INSTALLATION

Installing the remote totalizing unit

18

24 VDC

-

0085

TERZ94trm

Impulsausgänge

X4

Datenschnittstelle

X151

Datenschnittstelle

X15

4

321

X_TERZ90

Servicemodul

V12

V13

V14

TP-GND

EZD/RS-485

X152

S3

P

X2_0

C1

XLP1

Boot

X_S1

2 6

X1

X3

Taster

Reed 1+3 / 2+4

Sensorverstärker 3+4

Wiegand 3+5 / 4+6

X_S2

531

531

Current output 4-20mA yes no

C21

TEMP_LM7X

TERZ94p

RESET

X10-0

X16_0

X7

Q1

C22

EZSENS01

CX1

IP65

6
X

C

Impulseingang

X5

X6_0

PT1000

L1

CX3

CX2

-

+

-

+

-

-

+

+

-

X9

-

+

+

If your TERZ 94 is designed for remote totalizing, you can install the totalizing unit at a distance of
up to 50 m from the meter case. Usually, the cable has already been connected to the totalizing
unit when the TERZ 94 is delivered. Should this not be the case, you will have to connect the
connecting cable to Input-terminal X5, clamp S1+ and clamp S1- of the board. For 2-channel
meters connect the second sensor to the clamps S2+ and S2-. Use only shielded cables of the
type:

LIYCY - 2 x 0.75 blue (standard)
LIYCY - 2 x 2 x 0.75 blue (2-channel version)
Maximum cable length: 50 m

Furthermore, you must check the plug-in jumpers XS1, XS2 and XTERZ90 on the display board.

Settings at XS1 and XS2: jumpers 3-4

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START-UP

Start-up

Connecting the gas flow

Do not fill any downstream pipelines or station sections through the TERZ 94. This may
speed up the turbine wheel and lead to excessively high flow rates with resultant
damage.

Short-time overload operation of 20% above the maximum flow rate Q
damage will occur in the case of a return flow without shocks.

Before starting up the device, make sure that all lines have been correctly installed and connected
in the terminal compartment.
The case must be completely closed.

is permissible. No

max

19

Initializing the totalizing unit

When you start up the device for the first time, set the totalizing unit in the desired condition.
Check the programming of the pulse width, the LF pulse scaler, etc.

TERZ94-S:
Check the programming of the current output mode.

Note:

All parameters can only be changed after the cover of the meter has been removed.

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OPERATION

Operation

Display

In normal operating mode, the main totalizer is displayed.
When you press the control button on the right side of the case, all values will be shown.

20

After the preset display wake-up time has elapsed, the main totalizer will appear again.

If the display of the TERZ 94 does not show anything, the device is in energy-saving mode. In this
mode, the display is switched off. However, incoming pulses are processed and the outputs are set.
As soon as you press the control button, the display values will appear again.

Display
switched off:

0 0 0 0 5 8 3 1 m3 Main totalizer Vm

1 0. 0 0 0 m3/h Flow rate

0 0 0 0 0 0 0 0 m3 Start / stop totalizer

0 0 0 0 0 0 0 0 m3 Resettable totalizer

5 0. 0 0 P/m3 Meter factor

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OPERATION

1 -- Pulse scaler

21

000 0 0 0 0 1 MOD Configuration

0000008000 S.No. Serial number

Extra values for the TERZ 94-S

80.38 Hz Frequency (sensor)

0 0 0 0 5 8 3 1 m3 Main totalizer

An overview of parameters and the complete matrix are shown in the annex.

NOTE:

The button located externally on the case reacts when it is released and not when it is pressed. The
duration of pressing the button is evaluated and results in different reactions of the device.
Pressing the button for a short time causes the display to show the next display value, while
pressing the button for a longer time (more than 2 seconds) will activate all segments of the display
(segment test) and then the display will switch over to showing the Vm totalizer.
The following text describes procedures where the button is normally pressed for a short time.

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Programming

Programming

S

e

r

v

i

c

e

m

o

d

u

l

T

E

R

Z

9

4

t

r

m

T

E

R

Z

9

4

p

I

m

p

u

l

s

a

u

s

g

ä

n

g

e

D

a

t

e

n

s

c

h

n

i

t

t

s

t

e

lle

D

a

t

e

n

s

c

h

n

i

t

tst

e

l

l

e

E

Z

D

/

R

S

-

4

8

5

B

o

o

t

T

P

-

G

N

D

I

m

p

u

l

s

e

i

n

g

a

n

g

X

2

_

0

X

4

X
1
5

X
9

X151

X6_0

X

1

6

_

0

X

1

X
3

X

_

T

E

R

Z

9

0

S

3

S

1

S

2

S

4

P

P

OPERATION

Programming

For programming the TERZ 94 / 94-S, there are four buttons on the rear side of the board.
Alternatively, you can program the device with the programming module. The programming module
is to be connected to the pin connector indicated in the picture below.

22

CX2

PT1000

L1

CX3
CX1

EZSENS01

X10-0

TEMP_LM7X

531

Wiegand 3+5 / 4+6

X_S2

Sensorverstärker 3+4
Reed 1+3 / 2+4

531

X_S1

XLP1

2 6

X152

2

1

4

3

|

→

-

+

module

Q1

RESET

C21

X5

C22

C1

V12

V13

V14

6

X

C

P

Taster

X7

keys

Programming with the programming module is to be performed in the same way as with the
buttons.

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OPERATION

The external and internal buttons correspond to each other in the following way:

Int. button Ext. button Meaning

P P

Display mode:

Switch over to programming mode
(Press the button longer than 2 seconds)

Programming mode:

23

+

∧

Set the decimal point.

Display mode:

Switch over to the next higher level.

Programming mode:

- Increase the decimal by 1.

- Scroll in the list.
(Value identified with “L“)

-

∨

Display mode:

Switch over to the next lower level.

Programming mode:

- Decrease the decimal by 1.

- Scroll in the list.
(Value identified with “L“)

|

→

|

→

Display mode:

Short-time view of the coordinate (e.g. A01)

Programming mode:

Go to the right by one decimal place (if the last
decimal has been reached: Quit programming
mode).

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OPERATION

Principle of programming

For programming, you must always proceed as follows:

• First change over to the display value to be modified.

• To do this, press either the control button (only forwards)

24

• or the internal buttons “+” and “-” or the external buttons “

backwards).

• Change to programming mode by pressing “P” for at least 2 seconds. On the left side of the

display, a flashing character or cursor will appear. If necessary press the „|→“ key so many
times until a flashing character appears.

Flashing character

0 1 2 3.2 3 P/m3

• You can now modify the flashing decimal by pressing either “+” or “∧” (+1) or “-” or “∨” (-1).

Example: If you press the “∧“ button three times, the first decimal will be increased from 0 to 3.
If an “L” appears on the far left side of the display, this value is a list. With a list, you can only
scroll in the specified values.

” and “∨” (forwards and

∧

• After you have completed your programming of the first decimal, press “|→ ” once and the next

character will start to flash.
Now proceed with your programming until you have reached the last decimal place.

• Then you must press „“ once again to have the set value accepted and quit programming

mode.

• Press the “P“ button to set the decimal point behind the flashing digit. With totalizers, modes

and integers, no decimal point is permitted.

• Press the control button if you have made an error or if you want to discontinue inputting data.

Display values

Measured values, such as flow rate, frequency, etc. are display values and cannot be directly
modified. However, there are many parameters which influence the formation of these measured
values. These parameters are described in the following section.

Examples of display values: Flow rate, Version number, Year of construction, Serial number, Value
of the current output in mA etc.

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OPERATION

Parameters and Modes of the TERZ 94 / 94-S

In the following text, the individual parameters are described in detail.

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

With the meter factor (pulse value), the relevant flow rate at measurement conditions is calculated
from the signal frequency of the sensor element in the electronic totalizing unit:

3





f

⋅=

Q

M

3600

K

f: Signal frequency (Hz)
K: Meter factor (pulses/m3)
QM: Flow rate at measurement conditions (m3/h)

The meter factor has been calibrated in the factory in such a way that working cubic metres are
directly displayed. Its value can be read from a label located on the left side of the case.

Any modification of this adjustment is within the sphere of responsibility of the operating
company.

NOTE!
The new value is immediately used for all calculations performed after each
modification of the meter factor.

The uninfluenced signal frequency of the sensor element is available at the HF output.
The frequency range can be determined from the meter factor K and the minimum and maximum
flow rates at measurement conditions of the meter in accordance with the following formulae:

m





h





25

Q

K

f

min

minM

3600

⋅=

f

max

Q

3600

maxM

K

⋅=

QMmin: Minimum flow rate at measurement conditions
QMmax: Maximum flow rate at measurement conditions
K: Meter factor (pulse value)

Example:

Q

f

min

= 16

Mmin

16

3600

m3/h Q

=⋅=

=

250 m3/h K = 2362 pulses/m3

Mmax

Hz5.10Hz2362

f

max

250

3600

=⋅=

Hz164Hz2326

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OPERATION

26

2. LF pulse scaler

The frequency of the LF pulses is set by a pulse scaler (A07). There are the following setting
options: 0.01; 0.1; 1; 10; 100.

Other values can not be programmed, it is only possible to scroll in the list of these values (‘t’ key
vesp. ‘_’ key).

This pulse scaler has only effect on the frequency of the LF pulses not on the display. The number
of displayed digits after decimal point or a multiplier are programmed as an operating mode (A08)

Recommended values (= values set in the factory)

DN

[mm]

Pulsescaler

[pulses/m3]

LF decade

scaler

Pulse rate

[pulses/m3]

Maximum

output

frequency

1)

[Hz]

25 10 1 10 0.1
40 10 10 1 0.1
50 10 10 1 0.1
80 10 10 1 0.1

100²) 10 10 1 0.1

150 1 1 1 0.3
200 1 1 1 0.6
250 1 1 1 0.7
300 1 1 1 1.1
400 1 10 0.1 0.2
500 1 10 0.1 0.3
600 1 10 0.1 0.4

1) Rounded values

2) In the case of the design with Qmax=650 m3/h, the LF decade scaler is set at 1.

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OPERATION

3. Configuration

The basic configuration of the TERZ-94 is implemented via an 8-character display value (A08). This
“TERZ mode” defines the operating mode of the device.
Some parameters require a specific hardware or hardware configuration.

NOTE!
Hardware and software configurations must coincide.
Any modifications of these parameters can cause malfunctions.

Let’s start on the left side of the display: (operating alignment italic)

− Internal parameters

For testing and diagnostics (no influence on the metering result).

0: Menu for standard operation.
1: Menu for service
9: All parameters visible.

− Main totalizer mode

This parameter defines the unit for the gas volume

0: m3 (cubic meter).
1: cf (cubic foot).

− LF pulse width

The LF pulse width can be set at 125 ms or 250 ms.

0: 125 ms
1: 250 ms

− Cut-off time of the display

A few minutes after you have operated the device for the last time, the display will switch off to
expand the service life of the battery of the TERZ-94. There are the following times for selection:

0: 1 minute
1: 5 minutes
2: 10 minutes
3: 15 minutes
4: 1 hour (for test purpose only!)

− Interface protocol

0: OFF

4: Modbus / Modbus ASCII, only with suitable hardware

(no longer available).

27

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OPERATION

− Pulse scale

In this operating mode the display is set. To get the real totalizer readings the displayed value
must be multiplied with the multiplier.

0: 2 digits after decimal points, multiplier: 1
1: 1 digit after decimal points, multiplier: 1
2: no digits after decimal points, multiplier: 1
3: no digits after decimal points, multiplier: 10

28

4: no digits after decimal points, multiplier: 100

− Current output

0: OFF
1: Current output is active
2: Current output is active and faults are signalled (3,5 mA)
3: Current output is active and faults are signalled (21,8 mA)

− TERZ operating modes

There are the following operating modes at the moment:

0: ENCO-F
1: ENCO-M
2: TERZ 94 1 channel
3: TERZ 94 1 channel with start / stop totalizer
4: TERZ 94 1 channel with reset totalizer
5: TRZ03-TE/TEL 2 channels with pulse monitoring (SW), Vm Stop
6: TRZ03-TE/TEL 2 channels with pulse monitoring (SW), Vm Run
7: TRZ03-TE/TEL 2 channels with pulse monitoring (HW), Vm Stop
8: TRZ03-TE/TEL 2 channels with pulse monitoring (HW), Vm Run

9: TRZ03-TE/TEL 2 channels without pulse monitoring
SW means “pulse monitoring by software”, HW by hardware; Vm Stop means totalizer is
stopped in case of a fault whereas the counting continnes in the mode Vm Run.

Example:

00110112 MOD

2: TERZ – 1 channel
1: Current output is active, faults are not signalled.
1: Display of 1 digit after decimal point
0: Interface protocol off
1: Display cut-off time: 5 minutes
1: LF pulse width: 250 ms
0: Display in m3
0: Operating mode: No diagnostics mode is activated

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OPERATION

4. Pulse comparator

The 2-channel version of the TERZ-94 (TRZ03 TE / TEL) provides for pulse monitoring.
Pulse monitoring requires two input pulses which are out of phase.
If a pulse occurs at the same time on channel 1 and channel 2, a fault counter is increased. If there
is a missing pulse on one of the two channels, a fault counter is increased, too.
If this fault counter reaches the value X(A10) before Y(A11) undisturbed pulses have entered one of
the two channels, a fault will be outputted.
This fault will not be erased until Y undisturbed pulses have been counted.

29

5. Flow rate at 4 mA

With this parameter, you set the flow rate (in m3/h) which corresponds to an outputted current of
4 mA. Generally, the minimum flow rate Qmin of the meter is set here. (This setting is made in the
factory.)

6. Flow rate at 20 mA

With this parameter, you set the flow rate (in m3/h) which corresponds to an outputted current of
20 mA. Generally, the maximum flow rate Qmax of the meter is set here. (This setting is made in
the factory.) Then the current which will be outputted for flow rates within the programmed limits
will be between 4 and 20 mA and results from linear conversion.

7. Current default value (calibration current)

With this parameter, you set the value of the calibration current. A constant calibration current is
outputted if the current output mode parameter is set to default. The value of the calibration
current must be within the following limits:

Minimum value: 4 mA
Maximum value: 20 mA

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OPERATION

8. Current output mode

Here you define the measured or default value which is to be outputted.
0: Default value (see above)
1: Flow rate Qm

All other values are not permitted!

30

9. Current damping

Here you define how the current output is to be damped.
Permissible values for D are 0 to 0.9 !

Output current = (1-D) x value + D x old value

10. Correction factors for current offset and current rise

The current output is adjusted in the factory through two correction factors (offset and rise).

In the event that a recalibration should really be necessary, there is a PC-based program available
which will define the new offset and rise values for you.

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POWER SUPPLY

Power Supply

Depending on the type of the device, there are different options of power supply.

1. The basic TERZ 94 model is supplied by an internal lithium battery which enables to operate the
device continuously for a period of approx. six years. This, however, is conditional on the device
being read once a week or “woken up” by pressing the external button.

2.

If an interface module is used for transmitting data, such as the ENCO with external supply, the
service life of the battery is more than 10 years.

3. The TERZ 94-S (current transmitter) is completely supplied through a current loop. If pulse
processing is to be maintained even in the case of a power failure of the current loop, a standby
battery (available as an option) should be installed which will bridge the power supply during a
period of up to 6 months.

31

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MAINTENANCE

Maintenance

Lubrication

The TERZ 94 is fitted with permanently lubricated bearings up to and including the nominal
diameter of DN 150. From the nominal diameter of DN 200, the meter is fitted with a lubricator.

32

The type of lubricator and the lubrication instructions depend on the nominal diameter and the
pressure rating:

Nominal dia. Pressure rating Lubricator Lubrication instructions

DN 200

Meters produced
before November

Oil gun (supplied)

Every 3 months

2 strokes

2007 (pressure
classes PN 10,
PN 16 and
ANSI 150)

DN 200 all pressure

classes

DN 250 PN 10 to 16

Small oil pump

(pushbutton-

operated)

Every 3 months

6 strokes

ANSI 150

DN 250 PN 25 to 100

ANSI 300 to 600

from DN 300 all pressure

Large oil pump

(lever-operated)

Every 3 months

2 strokes

classes

Please observe also the instruction plate on the case.

In the case of unfavourable operating conditions, such as the formation of water or hydrocarbon
condensate or the use of dust-laden gas, we would recommend performing lubrication at shorter
intervals, even daily under extreme conditions (permanent formation of condensate).

Recommendations for lubricating oils:

Shell Tellus S2 MA 10 or another oil with 2 to 4°E at 25°C.

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MAINTENANCE

Changing the battery

For the TERZ 94 use only lithium batteries of the type SL 770/P Size C, 3.6 V produced by
Sonnenschein or type LS 33600 produced by Saft.

These batteries have a service life of approx. 6 years and can be ordered ready for installation from
RMG under the following order number:

For Ex and Non-Ex devices: 207626

Emergency battery for TERZ 94-S: 207658

• If you use other batteries than the replacement batteries from RMG, you run the

risk of the TERZ 94 not being approved for areas subject to explosion hazards any
more.

• In areas subject to explosion hazards, you must never insert or remove the battery.

Remove the display board from the case and change the battery in an area without
explosion hazards.

To change the battery, you must proceed as follows:

• Remove the cover of the meter head – on the rear side, there is the battery fixed with cable
ties.

• If the meter is located in an area subject to explosion hazards, disconnect the sensor wires
from terminal X5 (see chapter “Electrical connections” – Remember the terminals and colours!)
and take the display board to an area without explosion hazards.

• Remove the connecting wires of the battery from the contacts on the bottom of the terminal
board.

• Screw off the four screws with witch the battery board is fixed.

• Remove the cable ties with which the battery is fixed and take out the battery.

• Insert the new battery and fix it with cable ties.

•

Plug the connecting wires of the battery on the contacts of the terminal board. Make sure that
the polarity is correct.

• Reinsert the battery-board into the case and screw it on. In case you have previously
disconnected the wires of the sensor and the control button, you must connect them again
(make sure that the polarity of the sensor wires is correct!).

• Close the case.

33

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SPECIFICATIONS

Specifications

Measuring range

Under atmospheric pressure: 1:16
If the pressure increases, the measuring range of the meter extends. Measuring ranges of up to

34

1:50 can be reached.

Measuring error

For Q
For 0.2 · Q

to 0.2 · Q

min

to Q

max

: ≤ ±2% (DN 25 to DN 80: ±3%)

max

: ≤ ±1% (DN 25: ±2%, DN 40/50: ±1.5%)

max

Reproducibility: ≤ ±0.1%

Temperature ranges

Fluid temperature range: -10°C to +50°C
TERZ 94 II2 G EEx ib IIC T4 -20°C to +40°C

II2 G EEx ib IIC T3 -20°C to +60°C
TERZ 94-S II2 G EEx ib IIC T4 -20°C to +60°C
In the case of special designs, even higher or lower fluid temperatures are possible in non-Ex
versions.

Inputs and outputs

Sensor input S1 (Measuring input)

(For Ex connected loads, see approval certificate)
Terminals: X5,1 (+)

X5,2 (-)
Sensor type:
Wiegand sensor, direct Line length < 50 cm
Jumpers X_S1 / 3-5 and 4-6

Wiegand sensor, remote totalizer Line length < 30 m
Jumpers: X_S1 / 3-5 and 4-6
Jumpers: X_TERZ90 / 1-2

Reed contact Jumpers X_S1 / 1-3 and 2-4

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SPECIFICATIONS

Sensor input S2 (Comparative input or start/stop/reset)

(For Ex connected loads, see approval certificate)

Terminals: X5,3 (+)
X5,4 (-)
Sensor type:
Wiegand sensor, direct Line length < 50 cm

35

Jumpers X_S2 / 3-5 and 4-6

Wiegand sensor, remote totalizer Line length < 50 m
Jumpers: X_S2 / 3-5 and 4-6
Jumpers: X_TERZ90 / 3-4

Reed contact Jumpers X_S2 / 1-3 and 2-4

HF output

In the case of the explosion-protected (Ex) design, the device can only be connected to a certified
intrinsically safe circuit.

Terminals: X4,4 (+)
X4,3 (-)
Output: Open-drain transistor
Tpulse 1 ms ± 10%
Fmax: 300 Hz

Ex Non-Ex
Umin: 4.0 V 4.0 V
Umax: 28 V 30 V
Imax: 60 mA* (total current) 400 mA
External inductance 1 H
External capacitance 25 µF

* maximum total current of the 3 pulse outputs (LF + HF + Alarm)

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SPECIFICATIONS

LF output

In the case of the explosion-protected (Ex) design, the device can only be connected to a certified
intrinsically safe circuit. (For Ex connected loads, see approval certificate.)

Terminals: X4,2 (+)
X4,1 (-)
Output: Open-drain transistor

36

Tpulse 125 ms ± 10% (Fmax: 4 Hz)
250 ms ± 10% (Fmax: 2 Hz)

Ex Non-Ex
U

min

: 4.0 V 4.0 V

U

max

: 28 V 30 V

I

max

: 60 mA* (total current) 400 mA

External inductance 1 H
External capacitance 25 µF

* maximum total current of the 3 pulse outputs (LF + HF + Alarm)

Alarm output

In the case of the explosion-protected (Ex) design, the device can only be connected to a certified
intrinsically safe circuit. (For Ex connected loads, see approval certificate.)

Terminals: X4,6 (+)
X4,5 (-)
Output: Open-drain transistor

Ex Non-Ex
U

min

: 4.0 V 4.0 V

U

max

: 28 V 30 V

I

max

: 60 mA* (total current) 400 mA

External inductance 1 H
External capacitance 25 µF

* maximum total current of the 3 pulse outputs (LF + HF + Alarm)

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SPECIFICATIONS

Vo or RS-485 data interface

In the case of the explosion-protected (Ex) design, the device can only be connected to a certified
intrinsically safe circuit. (For Ex connected loads, see approval certificate.)

Vo data interface: InternalConnector (Binder)

Terminals: X15,4 (+) 4
X15,3 (-) 1
X15,1 and X15,2 open

U

min

: 7.0 V
Ui: 13.5 V
Ii: 15 mA
Pi: 210 mW
External capacitance: 2,5 µF
External inductance: 1 H
Ex separating unit: KFD2-ST2-Ex1.LB (Pepperl+Fuchs)

RS-485 data interface:

Terminals: X15,4 (+ supply)
X15,3 (- supply)
X15,2 (line A)
X15,1 (line B)

U

min

: 7.0 V
Ui: 10.5 V
Ii: 428 mA
Pi: 900 mW
Internal capacitance: 1,32 µF
Internal inductance: 600 µH
External capacitance: 23,7 µF
External inductance: 1 H
Ex separating unit: 17-21S1-S111 / EExi (Bartec)

Note: If the EZD protocol or the RS485 bus is used, the device is supplied via the data
interface.

37

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SPECIFICATIONS

Temperature input (hardware and software options)

For Ex connected loads, see approval certificate.

Terminals: X9,2 (+)
X9,1 (-)

Sensor type: PT 1000

38

Measuring range: -20°C to 60°C
Resolution: ± 0.2°C

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

Terminals: X22.1 (+)
X22,2 (-)
U

ext

(min): 12 V

U

ext

(max): 28 V

I

min

: 3.5 mA

I

max

: 23 mA

External load (max.): RLmax = (Uext - 10 V) / Imax (in Ω)
e.g. Uext = 16 V
⇒ RLmax = (16 V - 10 V) / 23 mA = 260 Ω
Current output with

- minimum flow rate: 4 mA

- maximum flow rate: 20 mA

- Warning: 3.5 mA

- Alarm: 23 mA
Accuracy, current output: Better than 1% of the final value

Data for the use in hazardous areas:

Ui = 28 V
Ii = 110 mA
Pi = 770 mW
Ci = 2,2 nF
Li = 110 µF

Materials used for the meter case

Spheroidal cast iron or steel, depending on the pressure class and the nominal diameter.
Aluminium is used for the threaded-end design.

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Hazardous area

Safe area

Isolating amplifiers*

KFD2-SOT-Ex2 (24 V/DC)

11

12

PE

Isolating amplifier

KFD2-SOT-Ex1 (24 V/DC)

* If 2-channel isolating amplifiers

SPECIFICATIONS

Examples of connection

Battery-operated device

Pin assignment (Binder):

1= LF - 4= LF +
2= Alarm - 5= Alarm +
3= HF - 6= HF +

4

3

2

1

5

6

Alarm output

LIYCY 2x0.75 mm blue

Pulse outputs

LIYCY 2x2x0.75 mm blue

2

2

24 V/DC

PE

1

3

4

6

1

3

7

8

PE
12

11

9

10

PE
12

11

7

8

Alarm

HF

LF

39

are used, the two inputs must
be separated!

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Manual TERZ 94 · EN09a · 2017-11

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Hazardous area

Safe area

Isolating amplifiers*

KFD2-SOT-Ex2 (24 V/DC)

11

12

PE

Isolating amplifier

KFD2-SOT-Ex1 (24 V/DC)

KFD2-STC3-Ex1 (24 V/DC)

* If 2-channel isolating amplifiers

SPECIFICATIONS

Main-powered device (Ex design)

(Connection only via the current module with built in backup battery)

40

Pin assignment (Binder):

1= LF - 4= LF +
2= Alarm - 5= Alarm +
3= HF - 6= HF +

4

3

2

1

5

6

Alarm output

LIYCY 2x0.75 mm blue

Pulse outputs

LIYCY 2x2x0.75 mm blue

2

2

24 V/DC

PE

1

3

4

6

1

3

7

8

PE

12
11

9

10

PE

12
11

7

8

Alarm

HF

LF

Supply unit

Current output

LIYCY 2x0.75 mm
blue

2

are used, the two inputs must
be separated!

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Safe area

Supply unit

Maximum sum of the currents (HF + LF + Alarm) < 400 mA

Alarm :

HF pulses:

LF pulses:

Pin assignment (Binder):

SPECIFICATIONS

Main-powered device (Non-Ex design)

(Connection only via the current module with built in backup battery)

41

1 = LF - 4 = LF +
2 = Alarm - 5 = Alarm +
3 = HF - 6 = HF +

4

3

2

1

5

6

HF, LF and Alarm output:

U : 24 V/DC

max

KFD2-CR-1.300 (or similar)

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TERZ 94

-S

ANNEX

Annex

Overview of Parameters for the TERZ 94/94-S

Parameter Setting Example (display)

42

A01

Main totalizer (Vm) 0 to 99999999

A02

Flow rate (Qm)

A03

Disturbing quantity totalizer 0 to 99999999

A04

Start-stop totalizer 0 to 99999999

A05

Resettable totalizer 0 to 99999999

A06

Meter factor in all: six digits

A07

Pulse scaler

A08

Configuration TERZ operating mode

A09

Error Rolling display

B01

Serial number 0 to 99999999

C01

Current output

C02

Flow rate at 4 mA 0 to 999999.99

C03

Flow rate at 20 mA 0 to 999999.99

0.01; 0.1;1;10;100

12345678 m³

12.3 m³/h

123 m³

12345678 m³

12345678 m³

12.3456 P/m³

L 1 --

00011021 MOD

0 ERR

12345678 MOD

12.345 mA

20.00 --

650.00 --

C04

Calibration current 4.000 to 20.000

C05

Current output mode 0 – Default value

4.000 mA

3 MOD

1 – Flow rate Qm

C06

Correction factor - Offset 0 to 99999999

C07

Correction factor - Rise 0 to 99999999

C08

Damping display / current

0 to 0.9

1234.5678 --

1234.5678 --

0.4 --

output

Z06

Frequency display

...............................................................................................................................................................................................................

651 Hz

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Cubic meter (m3)

Settings

DN150

1000

330

1

00110202

00110209

0

1000

variable, programmable from 4

-

20 mA

1

variable, programmabl

e from 4

-

20 mA

variable, programmable from 4

-

20 mA

0.7

DN150

650 580

1

00110202

00110209

0

650

1

0.7

Units:

DN100

400

1060

1

00110102

00110109

0

400

1

0.7

250 ms Off

DN80

250

2380

1

00110102

00110109

0

250

1

0.7

Pulse width LF output: Interface protocol:

DN80

160

2380

1

00110102

00110109

0

160

1

0.7

DN50

100

7700

1

00110102

00110109

0

100

1

0.7

DN40

65

7750

1

00110102

00110109

0

65

1

0.7

Menu for standard operation 5 minutes

DN25

25

13000

10

00110102

00110109

0

25

1

0.7

Parameter Nominal diameter Qm max (m3) Meter factor Pulse scaler (pulses/m3) Configuration 1 channel

2 channels, X:Y deactivated

Outp

ut current

Flow rate at 4 mA Flow rate at 20 mA Calibration current

0=default value

/

1=flow rate

Correction factor (offset) Correction factor (rise) Damping

Internal parameters: C

ut

-

off time of the display:

A06 A07 A08

C01 C02 C03 C04

C06 C07 C08

ANNEX

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

00110212

00110212

00110112

00110112

00110112

00110112

00110219

00110219

00110119

00110119

00110119

00110119

43

00110112

00110112

1 channel with 4 - 20 mA

00110119

00110119

without faults

2 channels, X:Y deactivated

with 4 - 20 mA without faults

m

Q

Current output mode

C05

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Cubic meter (m3)

Settings

DN600 16000

6

0.1

00110302

00110309

0

16000

variable, programmable from 4

-

20 mA

1

variable, programmable from 4

-

20 mA

variable, programmable from 4

-

20 mA

0.7

DN500

10000

12 0.1

00110302

00110309

0

10000

1

0.7

Units:

DN400

6500

24

1

00110202

00110209

0

6500

1

0.7

250 ms Off

DN300

4000

48

1

00110202

00110209

0

4000

1

0.7

Pulse width LF

Interface protocol::

DN250

4000

44 1

00110202

00110209

0

4000

1

0.7

DN250

2500

75

1

00110202

00110209

0

2500

1

0.7

DN200

2500

80

1

00110202

00110209

0

2500

1

0.7

Menu f

or standard operation

5 minutes

DN200

1600

135

1

00110202

00110209

0

1600

1

0.7

Parameter Nominal diameter Qm max (m3) Meter factor Pulse scaler (pulses/m3) Configuration 1 channel

2 channels, X:Y deactivated

Output current Flow rate at 4 mA Flow rate at 20 mA Calibration

current

0=default value

/

1=flow rate

Correction factor (offset) Correction factor (rise) Damping

Internal parameters: Cut

-

off time of the display:

A06 A07 A08

C01 C02 C03 C04

C06 C07 C08

ANNEX

Standard Parameters (values set in the factory) from DN 200

44

00110312

00110312

00110212

00110212

00110212

00110212

00110319

00110319

00110219

00110219

00110219

00110219

00110212

00110212

1 channel with 4 - 20 mA

00110219

00110219

m

Q

without faults

2 channels, X:Y deactivated

with 4 - 20 mA without faults

Current output mode

C05

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ANNEX

Fault and Event Display (coordinate A09)

In the TERZ 94/94-S there are 16 error messages.
The error numbers are indicated in a roll mode, if more than one error is active, the display changes

each second to the next active error (1... 5... 1... 5...).

Number "0" means faultless operation.

Fault

Fault description Remedy

No.

0 No fault ----­1 wrong EEPROM version, invalid constant TERZ 94 PCB board must be

exchanged

2 Pulse fault: (sensor loss / 10:10000

(X:Y))

Check the electrical connection of
the sensor. Possibly the sensor
must be exchanged.

3 EEProm Hardware fault TERZ 94 PCB board must be

exchanged
4 ----­5 Current output min/max fault:

(wrong range values)

Entered range values (C02 and C03)

are wrong or the value of the

counter factor is wrong.

Check the values and chenge them

if necessary.
6 ----­7 ----­8 Pulse output LF: (more than 500 NF

pulses accumulated in the memory)

Value of the LF output pulse factor

(A07) is too high and must be

adapted.
9 ----­10 Configuration ist wrong Selected mode of operation is

wrong. Change the operation mode

in coordinate A8.8 to 2.
11 -----
12 -----
13 -----
14 -----
15 -----
16 -----

45

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ANNEX

Reset

In case of malfunctions a Reset may reestablish the state of readiness. For this purpose the voltage
supply has to be interrupted and the meter head is switched off for this time. The program and the
operating parameters are not lost by this and also the totalizer readings remain valid. A Reset is
performed with the TERZ 94 by disconnecting the battery as well as a possibly existing external
voltage supply.

46

Booting

In case of serious disturbances it may be necessary to reboot the device.

With the booting all parameter settings and totalizer readings are lost! Therefore make a list of
all parameters of the meter before booting.

To reboot the device proceed as follows:

• For mains supplied devices switch off the power supply.

• For battery powered devices disconnect the battery (see section "Changing the battery"). Also a

possibly existing backup battery for mains supplied devices must be disconnected.

• Press the "P" key and keep it pressed.

• Connect the battery again and/or switch on the power supply again.

• Now the text "

δΕΛ ΑΛΛ

" appears in the display. Press the

• As soon as the addresses are counted up in the display, you can release the "P" key.

• The booting procedure has finished, if the totalizer is displayed (now set to 0).

Now enter all meter parameters again.

|

→-

key (Enter).

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A01 Main Totalizer Vm

X X X X

A02 Flow rate (Qm)

X X X X

A03 Disturbing quantity totalizer

NO X NO

A04 S

tart / Stop totalizer

X NO

X NO

A05 Resettable totalizer

X NO

X NO

A06 Meter factor

X X X X

A07 Pulse scaler

X X X X

A08 Configuration

X X X X

A09 Error

X X X X

A10 Operating mode Pulse X from X:Y

NO X NO

A11 Operating mode Pulse Y from X:Y

NO X NO

C01 Current output

NO NO

X X

C02 Flow rate at 4 mA

NO NO

X X

C03 Flow rate at 20 mA

NO NO

X X

C04 Calibration current

NO NO

X X

C05 Current output mode

NO NO

X X

C06 Correction factor

– offset NO NO

X X

C07 Correction factor

– Rise NO NO

X X

C08 Damping display / current output

NO NO

X X

Decimal point

Z02 Factor

NO NO NO NO

Z03 Divisor

NO NO NO NO

Z04 Direction of rotation for ENCO

NO NO NO NO

Z05 Totalizer

NO NO NO NO

Z06 Frequency

X X X X

Z07 Maximum flow value

0 0 0 0

Z08 Frequency

-

mode

0 0 0 0

Z09 Error state

0 0 0 0

X X X X

Not available

Available

X

Availabl

e in service mode

0

ANNEX

Matrix of the TERZ 94 / 94-S

Terz94 Terz94 Terz94-S Terz94-S

Coordinate Specification 1 Channel 2 Channel 1 Channel 2 Channel

X

47

X
X

B01 Serial number

X X X X

Z01

Z10 Number of pulses
Z11 Version number

Number of digit positions following a

NO NO NO NO

X X X X

NO

In case only a part of the matrix is displayed. It any depends on the operating mode, which fields
are displayed. Fields, which have no function in the selected operating mode are blanked out.

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Scrolling in the matrix (upwards)

Scrolling in the matrix (downwards)

> 2 sec.: switch to the programming mode

Button at the rear of the board

< 2 sec.: change of the unit in the coordinate

afterwards scrolling in the matrix (upwards)

Button at the rear of the board

ANNEX

TERZ 94 Button Assignments

Terz 94 Display Mode

48

12345678 m3

Terz 94 Programming Mode

12345678 m3

P

P

> 2 sec.: segment test and switching to Vm

< 2 sec.: switch to the coordinate

Abortion of programming

Flashing digit +1

Flashing digit -1

P

P

...............................................................................................................................................................................................................

Set decimal point / reset (if float)

Move to the next digit

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ANNEX

Converting the TERZ 94 into the TERZ 94-S

The TERZ 94 can be converted into a TERZ 94-S by installing another board.

• Remove the battery (see chapter “Changing the battery”).

• Remove the jumper for battery-powered mode (1-2) on the socket X2_0 of the board.

• Srew the 4 short stay bolts onto the present stay bolts on the board.

• Plug the current module TERZ94trm with a 12-pin connector (X2_1) into the socket X2_0.

• Apply the supply voltage (24V) to terminal X22 (1 +, 2 - ).

• Switch on the power supply (24 V).

• Check the current output:

− Set the current output in channel A08 to I-Out (mode 1 or 2).

− Channel C02: enter flow rate at 4 mA.

− Channel C03: enter flow rate at 20 mA.

− Set channel C04 (default value) to 10.0 mA.

− Set channel C05 (output mode) to 1 (current output is proportional to the flow rate).

− Channel C06: enter correction value for the current offset (see value on the board)

− Channel C07: enter correction value for the current rise (see value on the board)

− In the event that a recalibration should be necessary, there is a PC-based program

available which will define the new offset and rise values.

• Now the TERZ94-S is operational.

49

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ANNEX

Contact

50

Subject to technical modification

For further information

please visit our website:

www.rmg.com

or contact your local sales support office
to learn more about the RMG products.

RMG Messtechnik GmbH

Otto-Hahn-Straße 5
35510 Butzbach, Deutschland
Tel: [phone] – 0
Fax: [phone] – 130
Email: [e-mail]
Internet: www.rmg.com

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Manual TERZ 94 · EN09a · 2017-11