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Summary of Contents for BEKA BA304D
- Page 1 BA304D Intrinsically safe loop-powered 3½ digit field mounting indicator issue 12 Issue: 12 September 2008...
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Page 2: Table Of Contents
6.5 Calibration example approval for use in Canada 6.6 Over and under-range Appendix 2 ATEX dust certification Appendix 3 IECEx certification The BA304D 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
See Appendix 1. Fig 1 Simplified block diagram of BA304D All versions have IECEx certification. The main application of the BA304D is to display a measured variable or control signal in a hazardous process area. The zero and span of the display 3. -
Page 4: Zones, Gas Groups & T Rating
ATEX certification information plus BEKA For this reason the BA304D indicator has only an associates name and location. Non European apparatus certificate. No system certificate has certification information may also be included. The been issued, or is required, because the system... -
Page 5: Remote Indication
Fig 3A Simplest circuit with one side of 4/20mA current loop connected to earth 4.2 Remote indication A BA304D indicator may be driven from a 4/20mA safe area signal via an intrinsically safe interface to provide a remote indication within a hazardous area. -
Page 6: Installation
5. INSTALLATION 5.1 Location The BA304D indicator is housed in a robust IP66 glass reinforced polyester (GRP) enclosure incorporating an armoured glass window and stainless steel fittings making it suitable for exterior mounting in most industrial applications, including offshore and waste water treatment. -
Page 7: Calibration
When calculating the required span and zero settings the decimal point should be ignored. The BA304D is conditioned and calibrated by plug- in links and two multi-turn potentiometers located 6.4 Reverse action behind the instrument control cover which is Normally the BA304D display increases as the secured by two 'C' screws - see Fig 4. -
Page 8: Over And Under-Range
If the indicator display range is exceeded, the three least significant digits will be blanked. Under- range is indicated by -1 and over-range by 1. the display range is not exceeded, the BA304D will produce accurate readings outside the 4/20mA current range. Although not guaranteed, most BA304D indicators will operate between 3 and 25mA. -
Page 9: Maintenance
Depending upon the accessories fitted, one spare display assembly BA304D Negative The BA304D has been may be used to replace any BA304D which fails. displays -1 over-range incorrectly calibrated & The exchange may be made without disconnecting is trying to display a... -
Page 10: Routine Maintenance
7.5 Guarantee Indicators which fail within the guarantee period should be returned to BEKA associates or our local agent. It is helpful if a brief description of the fault symptoms is provided. 7.6 Customer comments... -
Page 11: Accessories
4/20mA input BEKA associates. current with the revised calibration. The BA304D can also be supplied with a blank or custom engraved stainless steel plate secured by two screws to the side of the instrument enclosure. This plate can accommodate: 8.3 Root extractor... -
Page 12: Calibration Example With Root Extractor
8.3.1 Calibration example with root extractor The BA304D is required to display rate of flow in This backlight must be powered from the safe area gallons per minute, with a resolution of 0.1 gallons. -
Page 13: Separately Powered Backlight
Vsupply –18 8.5 Pipe mounting kits End-to-end resistance of barrier Two pipe mounting kits are available for securing the BA304D to a horizontal or vertical pipe. Detailed assembly instructions are supplied with # or output resistance of galvanic isolator each kit. -
Page 14: Appendix 1
Appendix 1 Temperature rating FM approval for use in USA and cFM Approval for use in Canada The BA304D has a T4 temperature rating at a maximum ambient temperature of 60 It has been approved by FM for installation in the A1.0 Factory Mutual Approval... - Page 15 A2.1 Seperately powered backlight A2.3 Loop powered backlight The separately powered backlight is segregated This backlight is connected in series with the from the measuring circuit and has been approved 4/20mA measuring circuit so that like the BA324D as a separate intrinsically safe circuit under the indicator it is powered by the 4/20mA signal.
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Page 16: Atex Dust Certification
A2.1 Zones and Maximum Surface Temperature The BA304D has been ATEX certified as Group II, Category 1 GD apparatus Tamb = -20 to 60°C, with a Maximum Surface Temperature of 80°C. When installed as specified by EN 61241-14 ‘Selection,... -
Page 17: Iecex Certification
The IECEx certificate may be downloaded from www.beka.co.uk, www.iecex.com or requested from the BEKA sales office. A3.2 Versions of the BA304D All versions of the BA304D Fieldbus Display have IECEx certification. This includes: ATEX version for use in gas atmospheres. IECEx code Ex ia IIC T5 Ta = -40°C to 60°C...
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