FMS EMGZ307 Manual de usuario

Operating Manual EMGZ307

Analogue Tension Measuring Amplifier

Version 1.1 10/2009 ff

This operation manual is also available in German, French and Italian.

Please contact your local representative.

Diese Bedienungsanleitung ist auch in Deutsch, Französisch und Italienisch erhältlich.

Bitte kontaktieren Sie Ihren nächstgelegenen FMS Vertreter.

Ce mode d'emploi est également disponible en Français, en Italien et en Allemand.

Veuillez contacter la représentation locale.

Queste manuale d’installazione è disponibile anche in lingua italiana, francese e tedesco.

Vogliate cortesemente contattare la locale rappresentanza.

Operating manual EMGZ307

1Safety Instructions

1.1 Description conditions

a) High danger of health injury or loss of life

Danger

This symbol refers to high risk for persons to get health injury or loss life. It has to be

followed strictly.

b) Risk of damage of machines

Caution

This symbol refers to informations, that, if ignored, could cause heavy mecanical

damage. This warning has to be followed absolutely.

c) Note for proper function

Note

This symbol refers to an important information about proper use. If not followed,

malfunction can be the result.

1.2 List of safety instructions

Proper function of the Tension Measuring Amplifier is only guaranteed with the

recommended application of the components. In case of other arrangement, heavy

malfunction can be the result. Therefore, the installation instructions on the

following pages must be followed strictly.

Local installation regulations are to preserve safety of electric equipment. They

are not taken into consideration by this operating manual. However, they have to

be followed strictly.

Improper handling may damage the fragile electronic equipment! Don’t touch the

electronic unit! Don’t use rough tools as screwdrivers or pliers! Touch earthed

metal part to discharge static electricity before touching the electronic unit!

Bad earth connection may cause electric shock to persons, malfunction of the total

system or damage of the electronic unit! It is vital to ensure that proper earth

connection is done.

Operating manual EMGZ307

Table of Contents

1Safety Instructions ....................................................................................2

1.1 Description conditions 2

1.2 List of safety instructions 2

2Definitions..................................................................................................3

3System components...................................................................................4

3.1 Different EMGZ307 Variants 4

4System Description....................................................................................5

4.1 Functional description 5

4.2 Force sensors 5

4.3 Measuring amplifier EMGZ307 5

4.4 Block Diagram 6

5Dimensions.................................................................................................7

6Installation and Wiring ............................................................................8

6.1 Mounting and Wiring of the Electronic Unit 8

6.2 Mounting the Force Sensors 8

6.3 Wiring 9

7Setting into Operation.............................................................................10

7.1 View of the Setting Elements 10

7.2 Settings for EMGZ307.582388 10

7.3 Configuring Gain and Offset 11

7.4 Configuring the Outputs 12

7.5 Configuring the Lowpass Filters 13

7.6 Calibrating the Measuring Amplifier 14

8Trouble shooting......................................................................................15

9Technical Specification...........................................................................15

2Definitions

Offset:

Correction value for compensation of the zero point difference. Thanks to the offset, it

is ensured that a force of 0N will generate a signal of 0V exactly.

Gain:

Amplification factor for the measuring signal. Use of proper value will set the

measuring range of the sensor exactly corresponding to the signal output range

(0...10V).

Strain gauge:

Electronic component that changes its resistance when its length changes. Strain

gauges are used in the FMS force sensors for acquisition of the feedback value.

Operating manual EMGZ307

3System Components

The EMGZ307 consists of the following components (refer also to fig. 1):

Force sensors

•For mechanical/electrical conversion of the tension force

•Force measuring bearing

•Force measuring roller

•Force measuring journal

•Force measuring bearing block

Measuring amplifier EMGZ307

•Hybrid module for supplying the force sensors and amplification of the mV signal

•Robust design with compact aluminium housing (IP67)

•Gain and offset alternatively configurable for infinitely or fixed adjustment

•Freely configurable lowpass filter

•Freely configurable outputs (±10V; 0...20mA; 4...20mA)

•Supports connection of an external feedback display

(Components in italic letters indicate a variant or option)

3.1 Different EMGZ307 Variants

The tension measuring amplifier EMGZ307 is available in two variants:

EMGZ307: Standard 1-channel analogue amplifier

EMGZ307.582388: 1-channel analogue amplifier for rotating applications.

Electronics board is covered with moulding compound to

secure the components and provide protection from centrifugal

forces.

Note

This manual describes the possible setting of the standard amplifier EMGZ307. Some

options, however, are not available in the EMGZ307.582388. For more details refer to

chapter 7 “Setting into Operation”.

Operating manual EMGZ307

4System Description

fig. 1: Basic structure of the EMGZ307 Tension Measuring Amplifier E307001e

4.1 Functional Description

The force sensors measure the tension force in the processed material and transmit the

measuring value as a mV signal to the hybrid module in the measuring amplifier

EMGZ307. The measuring amplifier amplifies the mV signal depending on

configuration. The resulting feedback value can be transmitted to an analog

instrument, a PLC or equivalent devices.

4.2 Force Sensors

The force sensors are based on the flexion beam principle. The flexion is measured by

strain gauges and transmitted to the measuring amplifier as mV signal. Due to the

wheatstone wiring of the strain gauges, the measured value is according also to the

power supply. So, the force sensors are supplied from the EMGZ307 by a very

accurate power supply.

4.3 Measuring Amplifier EMGZ307

The EMGZ307 is a single channel analog Tension Measuring Amplifier based on a

hybrid circuit. It is developed specially for use under hard conditions. It is delivered in

a sealed housing compliant with IP67. There can be connected 1 or 2 force sensors of

350Ω. The hybrid module provides the highly accurate 5V power supply and amplifies

the mV signal of the force sensors to a level of 10V and 20mA. Tension and current

output are active the same time. The hybrid technology ensures both good thermal and

electrical characteristics. Measuring circuit and power supply are galvanic insulated.

All settings are done alternatively by 2 trimmers or fixed by jumpers. For filtering of

the signals, non-polarized capacitors can be soldered.

Operating manual EMGZ307

Infinite adjustment of gain and offset

Setting by trimmers is used to get a standardized output signal (for ex. 10V) from any

kind of sensor signal. This ensures accurate amplifying of the signal and maximum

immunity to any interference of the signal cable.

Fixed setting of gain and offset

Fixed setting is used when maximum thermal stability and vibration-proof conditions

are needed. The signal is pre-amplified with a fixed value and has to be evaluated

digitally (i.e. by PLC), so that offset and gain can be calculated.

4.4 Block Diagram

fig. 2: Block diagram E307002e

Operating manual EMGZ307

5Dimensions

fig. 3: Outline drawing EMGZ307 E307003us

Operating manual EMGZ307

6Installation and Wiring

Caution

Proper function of the Tension Measuring Amplifier is only guaranteed with the

recommended application of the components. In case of other arrangement, heavy

malfunction can be the result. Therefore, the installation instructions on the following

pages must be followed strictly.

Caution

Local installation regulations are to preserve safety of electric equipment. They are not

taken into consideration by this operating manual. However, they have to be followed

strictly.

6.1 Mounting and Wiring of the Electronic Unit

The aluminium housing of the measuring amplifier may be mounted to any place in

the machine, but usefully a position close to the force sensors is chosen. Wiring to the

terminals is done according to wiring diagram (fig. 4).

6.2 Mounting the Force Sensors

Mounting of the force sensors is done referring to the FMS Installation manual which

is delivered together with the force sensors.

Wiring to the terminals of the electronic unit is done according to wiring diagram (fig.

4).

Note

Connecting the shield of the signal cable to the electronic unit and to the force sensor

may cause ground circuits which may interfere the measuring signal massively.

Malfunction can be the result. The shield should be connected only to the electronic

unit. On the „force sensor side“, the shield should stay open.

Operating manual EMGZ307

6.3 Wiring

fig. 4: Wiring diagram E307004e

There can be connected 1 or 2 force sensors to the measuring amplifier. Using 2 force

sensors, the connections are internally wired parallel. The output signal of the

measuring amplifier then will correspond to the average value of the 2 sensors.

The connection between force sensors and measuring amplifier has to be done using

2x2x0.75mm2[AWG 18] shielded twisted-pair cable. (With cable length below 15m,

2x2x0.25 mm2[AWG 23] is also suitable.) The cable must be installed separate from

power lines.

Caution

Improper handling may damage the fragile electronic equipment! Don’t touch the

electronic unit! Don’t use rough tools as screwdrivers or pliers! Touch earthed metal

part to discharge static electricity before touching the electronic unit!

Caution

Bad earth connection may cause electric shock to persons, malfunction of the total

system or damage of the electronic unit! It is vital to ensure that proper earth

connection is done.

Note

The housing complies with IP67 only if no cable bushing stays open. Therefore, not

needed PG glands have to be closed.

Operating manual EMGZ307

7Setting into Operation

7.1 View of the Setting Elements

fig. 5: Wire terminals, switches EMGZ307 E307005e

7.2 Settings for EMGZ307.582388

The special type EMGZ307.582338 for rotating applications has different setting

options as the standard EMGZ307.

For the EMGZ307.582338 following differences exist:

•The offset is preset to “offset fix” see fig.7

•The gain is preset to “gain fix” = 1111 see fig. 7.

•The output current signal is preset to “4..20mA”, see fig. 9

•The electronics board of the amplifier is protected with moulding compound

•The unit is pre-assembled with cables of 8m length.

The wiring of the pre-assembled cables is described in the table below:

Cable Type Terminal Colour Signal Name

Force sensor, 4 wire cable 1 yellow +5V excitation

2 white +signal

3 brown -signal

4 green -5V excitation

Power supply, 2 wire cable 1 brown +24V

2 blue GND

Signal, 3 wire cable 1 brown 0-10V

2 black or

yellow/green GND

3 blue 4-20mA

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