MessKonzept FTC320-OEM Manual de usuario

FTC320-OEM

File name: 1.09KD221202EMAV01

Thank you for using the Messkonzept FTC320-OEM. It has been designed and manufactured

using highest quality standards to give you trouble-free and accurate measurements.

©Copyright Messkonzept GmbH 2022.

This document is protected by copyright. Neither the whole nor any part of it or the information

contained in it may be adapted or reproduced in any form except with the prior written approval

of Messkonzept.

All information of technical nature and particulars of the product and its use (including the in-

formation in this manual) are given by Messkonzept in good faith. However, it is acknowledged

that there may be errors or omissions in this manual. Images and drawings may not be in scale.

For the latest revisions to this manual contact Messkonzept or visit www.messkonzept.de

Messkonzept welcomes comments and suggestions relating to the product and this manual.

Please Note!

The design of this instrument is subject to continuous development and improvement. Conse-

quently, this instrument may incorporate minor changes in detail from information contained

in this manual.

Important!

In correspondence concerning this instrument, please specify the type number and serial number

as given on the type label on the right side of the instrument.

All correspondence should be addressed to:

Messkonzept GmbH

Niedwiesenstr. 33

60431 Frankfurt

Germany

Tel: +49(0)69 53056444

Fax: +49(0) 69 53056445

E-mail: [email protected]

Website: www.messkonzept.de

This manual applies to: FTC320-OEM

File name: 1.09KD221202EMAV01

Contents

I Operator Safety 4

1 Notes on Safety Conventions and Icons 4

2 Warning Notices 4

3 Safety Instructions 5

4 Intended Use 5

II Principle of Measurement 6

1 Determining Concentrations via Thermal Conductivity 6

2 FTC320-OEM Detector Unit 8

2.1 Description..................................... 8

2.2 EMC........................................ 9

III Assembly of the Instrument 9

1 Mounting 9

2 Pneumatic Connection 9

3 Electrical Connection 10

IV Output of the Instrument 11

V Communication with FTC320-OEM 11

1 Remote Control via Serial Communication 12

2 SetApp 3.0 12

VI Speciﬁcations 13

VII Scope of Delivery 13

VIII Drawings 14

File name: 1.09KD221202EMAV01

Part I

Operator Safety

This section provides information and warnings which must be followed to ensure safe operation

and retain the instrument in safe condition. Read this section carefully before installing and

using the software.

1 Notes on Safety Conventions and Icons

Warning!

”Warning” draws attention to application errors or actions that can lead to safety

risks, including injury to persons or malfunctions - possibly even destruction of the

device.

Note!

”Note” indicates an additional function or hint.

2 Warning Notices

Warning!

•The manufacturer does not assume liability for inappropriate handling of the

device. Malfunctions caused by inappropriate handling may lead to hazards.

•This device is not suited for the operation in areas exposed to explosion

hazards!

•Never lead explosive gases or gas mixtures into the device!

•Warranty expires if any element of the device is removed or replaced without

the consultation of Messkonzept.

•The unit and the cables must be eﬀectively protected against damage and

UV light.

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3 Safety Instructions

Warning!

•For the safe operation of the device, please pay regard to all instructions and

warnings in this manual.

•Only put the device into operation after it has been installed properly. A

competent and authorized person is required for installation, connection and

operation of the device. Please read and follow this manual for the installation.

•Defective devices must be disconnected from the process! This applies for

apparent damages of the device, such as physical damages, but also in the

case of unclariﬁed malfunctions in the operation. Separate the device from

the process pneumatically (both gas inlet and gas outlet) and remove the

power supply from the device.

•Make sure that the electric installation protection against accidental contact

adheres to the applicable safety regulations. The device must be connected

to protective earth before all other connections. Any interruption in the

protective earth connection can cause danger.

•Repairs should only be carried out by Messkonzept.

4 Intended Use

The FTC-series of gas analyzers oﬀer high-precision measurement and detection of non-

corrosive, dust-, condensate-, aerosol and oil mist-free gases 1. Explosive gases may not

be lead into the FTC. The Instrument may not be used in hazardous areas. Please contact

info@messkonzept.de for detailed information and solutions.

Upon installation, the protection class has to be considered. The ambient atmosphere should

not be corrosive. OEM-devices with protection class IP00 demand thermal and electric insula-

tion, as well as mechanical protection for operation.

FTC-series gas analyzers do not have a metrology marking in the sense of EU directive

2014/32/EU. They can, therefore, not be used in e.g. medical or pharmaceutical labora-

tory analyses or in the manufacture of pharmaceuticals in pharmacies based on a doctor’s

prescription.

The speciﬁcations of the device and its manual have to be observed strictly. Please ﬁll out

questionnaire (2.01.1FB180619MPL1) for registration of your measuring task, if your intended

use does not comply with intended use described above. Based on the information given in

the questionnaire Messkonzept will examine the measuring task and possibly authorize it.

Note: Please keep this manual for future use.

1Messkonzept also oﬀers, upon request, other models of the FTC-series analyzers that can monitor, addition-

ally to the aforementioned, ﬂammable or explosive gases. For more information in this regard, do not hesitate

to contact us.

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Part II

Principle of Measurement

1 Determining Concentrations via Thermal Conductivity

Thermal Conductivity Detectors (TCD) have been used in the chemical industry since the

1920s as the ﬁrst process gas analyzers for the quantitative composition of gas mixtures.

Every gas has a unique heat conductivity that is governed by its molar mass and viscosity.

The measurement is based on the principle that the thermal conductivity of a gas mixture is

dependent on the thermal conductivity of its gas components and their fractional amounts

in the mixture. Thus, the concentrations of diﬀerent components of a gas mixture can be

calculated from the thermal conductivity.

The main advantage of the TCD’s measurement principle compared with the wide spread

infrared analysis technique is that it is not limited to gases with a permanent dipole moment.

It can identify noble gases (He, Ar, Ne, etc.) as well as homonuclear gases such as H2

and N2. Furthermore, it is robust and cost eﬀective. The principle of thermal conductivity

measurement works best if the analyzed gas components’ thermal conductivity vary greatly.

For TC measurement based analysis, one of the following conditions must be met:

•The mixture contains only two diﬀerent gases (binary mixture), e.g. CO2in N2or

H2in N2

•The thermal conductivity of two or more components is similar but diﬀerent than that

of the measuring gas, e.g. measuring H2or He in a mixture of O2and N2(quasi binary

mixture)

•The mixture contains more than two gases and the volumetric fractions of all but two

components (or component groups) are constant over time

•The mixture contains more than two gases, of which all but two components’ concen-

trations can be determined through other measurement principles (as employed in the

FTC400 through cross-sensitivity compensation of IR- and TC-sensor information)

The thermal conductivity of gases rises with temperature and the slope of the

increase with temperature is diﬀerent for diﬀerent gases. Upon request, it can be

checked whether the temperature of heat sink and/or source should be changed in

order to improve the accuracy or to avoid cross-sensitivity eﬀects.

Cross-sensitivity is the sensitivity of the measurement on other gases than the

measured component.

The FTC320-OEM contains a TC sensor that analyzes the quantitative composition of gas

mixtures. The measurement is based on the heat transfer between a heat source and a heat

File name: 1.09KD221202EMAV01

Figure 1: Schematic drawing of thermal conductivity measurement. The sensor is mounted in

the stainless steel block that is kept at a constant temperature.

sink.

The measuring gas is led through a stainless steel block that is kept at a constant temperature of

63◦C (for most applications). The block temperature is stabilized using a control loop - it serves

as a heat sink of constant temperature. A micro mechanically manufactured membrane with

a thin-ﬁlm resistor serves as heat source. A control loop stabilizes the membrane temperature

at 135◦C (for most applications).

Above and below the membrane two small cavities are etched into the silicon. These cavities

are ﬁlled with measuring gas by diﬀusion. The surfaces opposite to the membrane are thermally

connected with the heat sink. Through maintaining a constant temperature gradient between

the two opposite surfaces, the heat ﬂow is dependent of the gas mixture’s thermal conductivity

alone. Hence the voltage needed to keep the membrane temperature constant is a reliable

measure for the thermal conductivity of the mixture and can be used further to determine the

gas mixture’s composition.

“Basic range“ is the largest possible measuring range and is set by default. The

linearization is performed over the basic range. The smallest measuring ranges

at the beginning and the end of the basic range are facilitated through speciﬁc

calibration. They can be estimated by linear Interpolation.

Table 1 lists typical gas pairs and their measuring ranges.

File name: 1.09KD221202EMAV01

Measuring Gas Carrier Gas Basic range Smallest range Smallest suppressed zero range

H2 He 20% - 100% 20% - 40% 85% - 100%

H2 CH4 0% - 100% 0% - 0.5% 98% - 100%

H2 N2 or air 0% - 100% 0% - 0.5% 98% - 100%

H2 Ar 0% - 100% 0% - 0.4% 99% - 100%

H2 CO2 0% - 100% 0% - 0.5% 98% - 100%

He N2 or air 0% - 100% 0% - 0.8% 97% - 100%

He Ar 0% - 100% 0% - 0.5% 98% - 100%

CH4 N2 or air 0% - 100% 0% - 2% 96% - 100%

CH4 Ar 0% - 100% 0% - 1.5% 97% - 100%

O2 N2 0% - 100% 0% - 15% 85% - 100%

O2 Ar 0% - 100% 0% - 2% 97% - 100%

NH3 H2 0% - 100% 0% - 5% 95% - 100%

N2 Ar 0% - 100% 0% - 3% 97% - 100%

N2 CO2 0% - 100% 0% - 4% 96% - 100%

CO H2 0% - 100% 0% - 2% 99% - 100%

Ar N2 or air 0% - 100% 0% - 3% 96% - 100%

Ar CO2 0% - 100% - 80% - 100%

CO2 N2 or air 0% - 100% 0% - 3% 96% - 100%

CO2 Ar 0% - 100% 0% - 10% -

SF6 N2 or air 0% - 100% 0% - 2% 96% - 100%

Table 1: The measuring ranges of typical gas compositions for analysis with the FTC320-OEM.

2 FTC320-OEM Detector Unit

2.1 Description

The FTC320-OEM is a highly precise and stable Thermal Conductivity Detector (TCD) that is

designed for the use as an OEM detector. The unit consists of a hermetically sealed pressure

proof stainless steel block with a gas duct, which is suited for pressures up to 20 bar. Sample

gas entering through the gas inlet is guided to the micro-mechanical thermal conductivity

sensor and further downstream to the outlet port. In particular the pneumatics are designed to

minimize the inﬂuence of a changing gas ﬂow. The operating temperature of 63◦C is stabilized

by a highly accurate PI control loop.

In order to avoid electrical interference on the measuring output, the high performance analog

adaption circuit is directly mounted on top of the stainless steel block. The Processor board

digitizes the signal in a 24bit A/D converter. The micro-controller performs all calculations,

such as linearization, calibrations and cross sensitivity compensation directly on the detector

unit.

For indication of the signal, a 0 to 10V analog output is provided. For internal calibration,

conﬁguration and digital indication of the signal a TTL-level RS232 or USB communication

2is required. For these features and for testing purposes (e.g. plotting and logging the

signals), Messkonzept oﬀers a Microsoft Windows software and/or a terminal program in order

to perform Oﬀset and Gain calibration on a PC. For more information, see part V.

2depends, among others, on the place and way of installing the device

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2.2 EMC

The product FTC320-OEM does not meet EMC (Electromagnetic Compatibility) requirements,

since the device is not shielded. Proper shielding and ingress protection (IP) might be required.

Part III

Assembly of the Instrument

1 Mounting

Warning!

The FTC320-OEM unit must be thermally isolated from the environment!

The bottom view of the FTC320-OEM shows four M3 thread holes which can be used for

the ﬁxation of the detector (see Figure 2). Use insulating spacers (min. 4mm) and stainless-

steel screws in order to minimize heat ﬂow from the 60°C hot detector body. For water-tight

bulkhead mounting, two spacer and two M8 nuts are available upon request.

Figure 2: Dimensions of the FTC320-OEM. The M3 thread holes on the back of the detector

are shown in the illustration on the left.

2 Pneumatic Connection

For the pneumatic connection, it is important to know the direction of the gas ﬂow, i.e.

diﬀerentiate between the gas inlet and outlet. Looking at the FTC320-OEM with the electronic

boards facing upwards, the gas inlet is on the right-hand side (see ﬁgure 3).

File name: 1.09KD221202EMAV01

Gas inlet and outlet tubes - as well as the body - are stainless steel (1.4571/1.4404). The

outer diameters of the tubes are 6mm. The inner gas duct is heated up to 63°C (versions with

higher temperatures available on demand). In case condensation may occur in the sample gas

lines and connections at ambient temperatures, heated lines and connections must be used in

order to avoid condensation. With proper heated lines and connections, a dew point up to

50°C is permissible.

Figure 3: The gas in- and outlet of the FTC320-OEM.

Warning!

The gas led into the device cannot contain any dust, condensate and potentially

condensing matter unless the FTC unit equipped with a ﬁlter membrane protecting

against condensate and dust. Liquid droplets or dust will immediately destroy the

sensor element upon contact. If your gas sample may not be dust-, condensate-

or corrosion-free, please state this in your request and we will provide you with a

suitable FTC320-OEM unit.

3 Electrical Connection

Figure 4 illustrates the available electrical connections of the FTC320-OEM.

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