METROTEC GSM-V6 Manuel utilisateur

Oxygen measurement and control unit

Typ GSM

*** Version 2.1 ***

METROTEC

S yst ems fo r o xyg en mea s u re men t

GSM

METROTEC

Declaration of Conformity

for

Oxygen measurement and control unit

GSM-V6

This device has been designed for industrial purposes in accordance with:

EN 61000-6-4

EN 61000-6-2

It is compliant with the directives:

EMC Directive: 2014/30/EU

Low Voltage Directive: 2014/35/EU

RoHs: 2011/65/EU

This device complies with following standards:

EN 61010-1

EN 61000-6-4

EN 61000-6-2

EN 63000

Description of measures taken to assure compliance:

Quality management system DIN EN ISO 9001:2015, No. 12 100 27736 TMS

This declaration becomes invalid if changes are made without

our consent.

Kirchheim/Teck, 07.10.2019

Place, Date Signature

Heinkelstraße 12 • D-73230 Kirchheim

Telefon 07021/95336-0 • Fax 07021/95336-13

www.metrotec.eu • [email protected]

METROTEC

Contents

1 SAFETY INSTRUCTIONS........... 4

2 PREFACE ...................................... 5

3 INTRODUCTION ......................... 6

3.1 Measurement principle ............. 6

3.2 Measurement electronics .......... 7

3.3 Sensor ...................................... 7

4 GENERAL ARRANGEMENT ..... 7

4.1 Description of the measurement

electronics ........................................... 8

4.2 Description of the sensor.......... 8

4.3 Sketch of the ducting system .. 10

5 PUTTING THE UNIT INTO

OPERATION....................................... 11

5.1 Switching the unit on ............. 11

5.2 Measurement.......................... 11

5.3 Bottled gases.......................... 11

5.4 Process gases ......................... 11

5.4.1 General .......................... 11

5.4.2 Hot process gases........... 11

5.4.3 Special process gases ..... 11

5.4.4 Location of condensate

collectors12

5.4.5 Filter system arrangement:

5.5 Switching off the measurement

unit 12

6 OPERATION............................... 13

7 CONFIGURATION..................... 17

7.1 Enablement of Configuration ..17

7.2 Displayed values.....................18

7.3 Process parameters .................19

7.4 mA outputs .............................19

7.5 Alarm output ..........................21

7.6 Control output.........................21

7.7 Scaling of the trend graphs......22

8 OPTIONS .....................................22

8.1 Dew point ...............................22

8.2 Lambda ..................................23

8.3 CO..........................................23

8.4 Calculated oxygen value .........23

9 INTERFACES ..............................24

9.1 Analog interfaces....................24

9.2 Digital interfaces ....................24

9.2.1 Standard interfaces .........24

9.2.2 Optional interface: RS 485

9.2.3 Optionale interface:

Ethernet 28

10 SPECIAL FEATURES.................29

10.1 Correction factors ...................29

10.2 Filter factor.............................30

10.3 Oxygen controller ...................30

10.4 Coding....................................31

10.5 Function of the clock ..............31

11 TECHNICAL DATA....................32

12 CONNECTION PLAN.................33

METROTEC

1 Safety instructions

&Please read through this operating manual very carefully before in-

stalling and commissioning the unit.

Incorrect utilisation will invalidate the guarantee!

Correct functioning and the operating safety of the unit can only be

guaranteed if the ambient conditions specified in the Specifications

chapter are maintained.

Only qualified specialists are permitted to commission and operate

the unit. The owner of the unit must ensure that the installation com-

plies with the relevant laws and directives. These include, for exam-

ple, the EU Directives covering safety in the workplace, national

safety in the workplace regulations and the prevention of accidents

regulations, etc.

You must ensure that the power supplies concur with the details

listed on the nameplate. All of the covers needed to ensure that the

unit cannot be touched when operating must always be fitted. You

must consider the effects of the overall operation and take the neces-

sary precautions if the unit will be linked up with other equipment

and/or devices before you switch on.

Parts and surfaces will occasionally become and remain hot during

the installation or de-installation. Suitable precautions must be taken

in order to prevent injuries or damage to the unit from occurring.

If the unit shows signs of having been damaged and you are of the

opinion that that safe operation is no longer possible then you must

not run the unit. We recommend that periodical inspections are car-

ried out at our factory or by our customer service department at least

once a year.

Future disposal must always comply with the legal regulations.

METROTEC

2 Preface

With the aid of an oxygen sensor , the measurement unit serves to measure the oxygen partial

pressure in gaseous atmospheres. Such sensors work at high temperatures and so it is neces-

sary for measures to be taken to ensure that no flammable gas mixtures contact the sensor or

the unit. In the event of the sensor ceramic suffering breakage the measurement gas could es-

cape or air could enter the measurement gas side of the unit and so suitable measures have to

be taken to avoid such an event leading to environmental pollution or damage being done to

equipment.

In the event of incorrect parameters being set or the occurance of leakage, corrosion,

condensation, etc., damage could be done to the equipment and incorrect measurement

results be indicated and so it is essential that all parts of equipment be regularly

serviced.

The oxygen sensor and its accessories are subjected to

thorough quality control in accordance with DIN ISO

9001 in the course of their manufacture and testing.

They must only be installated and used in compliance

with all applicable local and special regulations, partic-

ularly the VDE and DVGW standards that apply in Ger-

many.

The measurement accuracy and effective function of the

measurement device will need to be checked at intervals

whose frequency will depend on the applicaton con-

cerned. Such a check must be effected in the course of a

calibration and examination check on the equipment be-

ing first put into operation.

METROTEC

3 Introduction

3.1 Measurement principle

Oxygen measurement units are designed to process signals transmitted from an ox-

ygen sensor constructed of stabilized zirconium oxide. Zirconium oxide, a ceramic

material that is also spoken of as a solid-state electrolyte, acts as an excellent oxy-

gen-ion conductor when at a high temperature.

Within certain temperature limits, that depend on the doping of the material con-

cerned, such ion conductors are able to fill empty spaces in their crystal lattice with

oxygen ions. The oxygen ions occur against an electrically conductive surface that is

generally of platinum.

The concentration of oxygen in a measurement gas is thus decisive for the extent of

oxygen activity, and thus for the number of oxygen ions.

An oxygen sensor consists essentially of a solid-state electrolyte with a contact sur-

face on both sides.

One side of the electrolyte is in contact with a reference gas such as air, and the oth-

er with the gas whose oxygen content is to be measured. The mechanical construc-

tion of the sensor prevents contact between the two gases so that there is no risk of

their being intermixed.

Depending on the application concerned, heated or unheated sensors are used. Un-

heated sensors are generally used in furnaces while heated sensors are used for ap-

plications where the gas to be measured is at a temperature of less than around 600

degrees Celsius (the measurement principle necessitates the sensor being main-

tained at a temperature of not less than 500 - 650 degrees Celsius).

Heated sensors are maintained at a set temperature by an electronic temperature

regulator that forms part of the electronic control unit. The temperature of both heat-

ed and unheated sensors as measured by the electronic control is an important pa-

rameter for inclusion in the calculation of the oxygen content (oxygen partial pres-

sure) in accordance with the following equation:

EMF R T

××

ln( )

whereby:

R = 8.31J/mol K

T = Temperature in Kelvin

F = 96493 As/mol

1= Oxygen partial pressure on the reference side with 0.20946

bar

2= Oxygen partial pressure on the measurement gas side

EMF = Electromotive forcein Volts

METROTEC

3.2 Measurement electronics

The electronic circuit of the measurement unit Type GSM provides the following functions:

Measurement of the oxygen partial pressure

Maintaining the oxygen content at a preset level

Generating alarm signals

Option: Calculation of the dew point

Option: Calculation of the air factor lambda point

The device is operated with the aid of a keypad.

Menus assist the operator in the selection of inputs and outputs

and in the setting of parameters.

3.3 Sensor

The sensor of Type A04 is built into the front panel. It includes the actual measurement ele-

ment of platinum-plated zinc oxide, the heating element needed to heat-up the measurement

element to the minimum temperature of 700 degrees Celsius and the thermocouple needed to

detect the exact temperature at all times.

The front panel also carries a bypass valve, an illuminated flow meter, gas inlet and outlet

connections and also a potentiometer for adjusting the delivery of the gas pump if one is fitted

to ensure a flow of the gas who's properties are to be measured.

4 General arrangement

METROTEC

4.1 Description of the measurement electronics

The elements at the front of the unit are in three groups

Keypad:

The keypad has four keys by means of which all the necessary functions can be effected.

Display:

The graphic display provides for the display of measured values, data, time graphs and mes-

sages.

4.2 Description of the sensor

1 Gas outlet

2 Flow meter

3 Bypass valve

4 Pump power

5 Gas inlet

When the power supply to the measurement unit is switched on the sensor is heated for a pe-

riod of 10 - 25 minutes to bring it up to the required minimum temperature.

NOTE: During the heating-up period the unit does not indicate any useable values.

METROTEC

When the gas inlet is opened and the gas pump is switched on, the unit should indicate

20.9 % O2. If necessary, a correction can be made as detailed under "Correction" in the oper-

ating instructions.

The gas who's properties are to be measured is then fed to the sensor. The rate of flow should

be within the green, background illuminated region of the flow meter and should never be al-

lowed to exceed the range of the flow meter (this is a point of particular importance when the

gas comes from a gas cylinder).

An excessive rate of flow could result in the destruction of the sensor

The rate of flow can be set with the aid of the bypass valve and of the potentiometer that ad-

justs the delivery of the gas pump.

When the bypass valve is fully open the full flow of gas enters the measurement unit while a

rate of flow some five times greater than occurs when the bypass valve is closed is constantly

indicated.

METROTEC

4.3 Sketch of the ducting system

Ce manuel convient aux modèles suivants

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