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Summary of Contents for BEKA BA304ND
- Page 1 BA304ND Type nL certified loop-powered 3½ digit field mounting indicator issue: 8 Only for replacement use after May 2013. Use BA304NE for new applications issue: 8 March 2014...
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Page 2: Table Of Contents
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 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... -
Page 3: Description
1. DESCRIPTION The BA304ND is an Ex nL certified loop powered digital indicator which displays the current flowing in a 4/20mA loop in engineering units. The instrument introduces less than a 1.1V drop which allows it to be installed into almost any 4/20mA current loop. -
Page 4: 4/20Ma Input Terminals
Installed in a Zone 2 hazardous area Fig 2 illustrates a typical application in which a Used at ambient temperatures between BA304ND indicator is connected in series with a 2- -20 and +60°C wire transmitter and controller. Used with gases in groups:... -
Page 5: Remote Indication
Terminals 2 and 4 are internally joined from a gas analyser drives a BA304ND. Again it is and may be used for linking the return 4/20mA wire necessary to ensure that the loop complies with - see Fig 2. -
Page 6: Installation Procedure
5.2 Installation Procedure 5.3 EMC illustrates instrument installation The BA304ND complies with the requirements of procedure. the European EMC Directive 2004/108/EC. For specified immunity all wiring should be in screened Remove the instrument terminal cover by twisted pairs. unscrewing the two captive 'A' screws. -
Page 7: Zero Adjustment
When calculating the required span and zero is indicated by -1 and over-range by 1. If the settings the decimal point should be ignored. display range is not exceeded, the BA304ND will produce accurate readings outside the 4/20mA current range. Although not guaranteed, most BA304ND indicators will operate between 3 and 25mA. - Page 8 Fig 6 Position of plug-in links and potentiometers shown with control cover removed...
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Page 9: Maintenance
7. MAINTENANCE If a BA304ND fails after it has been functioning correctly, the following table may help to identify the cause of the failure. 7.1 Fault finding during commissioning BA304ND fails function during commissioning the following procedure should be Symptom... -
Page 10: Guarantee
BEKA associates. Before reassembling ensure that the sealing gaskets are undamaged and free from dirt and foreign bodies. The BA304ND can also be supplied with a blank or custom engraved stainless steel plate secured to the front of the instrument by two screws. -
Page 11: Root Extractor
5% (4.04mA). The location of the clip- 8.3.1 Calibration example with root extractor off link is shown in Fig 7. Access to the link is The BA304ND is required to display rate of flow in gained carefully removing indicator gallons per minute, with a resolution of 0.1 gallons. -
Page 12: Display Backlights
1 and 13 of the BA304ND must not No additional power supply or field wiring are exceed: required, but the indicator voltage drop is increased. -
Page 13: Loop Powered Backlight
Fig 9 Loop powered backlight 8.5 Pipe mounting kits Two pipe mounting kits are available for securing the BA304ND to a horizontal or vertical pipe. Detailed assembly instructions are supplied with each kit. BA392D Stainless steel bracket secured by two worm drive hose clips. Will clamp to any pipe with an outside diameter between 60 and 80mm.
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