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1.  Description

2.  Operation

3.  Type 'nL' certification

3.1  Certificate of Conformity
3.2  ATEX certification
3.3  4/20mA input terminals
3.4  Zones, gas groups and T ratings
3.5  Certification label Information

4.  System design for Zone 2

4.1  Transmitter loops
4.2  Remote indication

5.  Installation

5.1  Location
5.2  Installation procedure
5.3  EMC

6.  Calibration

6.1  Zero adjustment
6.2  Span adjustment
6.3  Decimal point
6.4  Reverse action
6.5  Calibration example
6.6  Over and under-range

7.  Maintenance

7.1  Fault finding during commissioning
7.2  Fault finding after commissioning
7.3  Servicing
7.4  Routine maintenance
7.5  Guarantee
7.6  Customer comments

8.  Accessories

8.1  Units of measurement & instrument
       identification.
8.2  Internal calibrator
8.3  Root extractor

8.3.1  Calibration example with root
          extractor.

8.4  Display backlights

8.4.1  Separately powered backlight
8.4.2  Loop powered backlight

8.5  Pipe mounting kits
8.6  Stem mounting kit

CONTENTS

The BA304ND is CE marked to show compliance with the European Explosive Atmospheres

Directive 94/9/EC and the European EMC Directive 2004/108/EC

Содержание BA304ND

Страница 1: ...issue 8 4th March 2014 BA304ND Type nL certified loop powered 3 digit field mounting indicator issue 8 Only for replacement use after May 2013 Use BA304NE for new applications...

Страница 2: ...on example 6 6 Over and under range 7 Maintenance 7 1 Fault finding during commissioning 7 2 Fault finding after commissioning 7 3 Servicing 7 4 Routine maintenance 7 5 Guarantee 7 6 Customer comments...

Страница 3: ...wer the analogue to digital converter and liquid crystal display The voltage developed across R1 which is proportional to the 4 20mA input current provides the input signal for the analogue to digital...

Страница 4: ...mperatures between 20 and 60 C Used with gases in groups Group A propane Group B ethylene Group C hydrogen Used with gases having a temperature classification of T1 450 C T2 300 C T3 200 C T4 135 C or...

Страница 5: ...alyser drives a BA304ND Again it is necessary to ensure that the loop complies with the two design requirements listed in section 4 1 Fig 3 Remote indication 5 INSTALLATION 5 1 Location The BA304ND in...

Страница 6: ...re 5 3 EMC The BA304ND complies with the requirements of the European EMC Directive 2004 108 EC For specified immunity all wiring should be in screened twisted pairs Fig 5 Dimensions and terminal conn...

Страница 7: ...plug in link shown in Fig 6 When calculating the required span and zero settings the decimal point should be ignored 6 4 Reverse action Normally the BA304ND display increases as the input current inc...

Страница 8: ...8 Fig 6 Position of plug in links and potentiometers shown with control cover removed...

Страница 9: ...n not enter the enclosure Before replacing control terminal covers ensure that the sealing gaskets are undamaged and free from dirt and foreign bodies If a BA304ND fails after it has been functioning...

Страница 10: ...dirt and foreign bodies To gain access to the display label remove the terminal cover by unscrewing the two A screws which will reveal two concealed D screws Unscrew the four D screws and carefully l...

Страница 11: ...ely clip off can be selected which will force the display to zero at flows below 5 4 04mA The location of the clip off link is shown in Fig 7 Access to the link is gained by carefully removing the ind...

Страница 12: ...d wiring are required but the indicator voltage drop is increased Alternatively the separatly powered backlight has a bright orange output which enhances daylight viewing but additional field wiring a...

Страница 13: ...t secured by two worm drive hose clips Will clamp to any pipe with an outside diameter between 60 and 80mm BA393D Heavy duty stainless steel bracket secured by a V bolt Will clamp to any pipe with an...

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