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Summary of Contents for BEKA BA324ND
- Page 1 BA324ND Type nL certified loop-powered 4½ digit field mounting indicator Issue 7 Only for replacement use after May 2013. Use BA324NE for new applications Issue: 7 March 2014...
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Page 2: Table Of Contents
8.1 Fault finding during commissioning 8.2 Fault finding after commissioning 8.3 Servicing 8.4 Routine maintenance 8.5 Guarantee 8.6 Customer comments The BA324ND 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 BA324ND is a 4½ digit Ex nL certified loop Blank display For 0.5 seconds. powered digital indicator which displays the current flowing in a 4/20mA loop in engineering units. The Decimal points For 3 seconds. indicator only introduces a 1.1V drop which allows... -
Page 4: Type N Certification
3.4 Zones, gas groups and T rating No function in the display mode. The BA324ND has been certified as Group II, Category 3G Ex nL IIC T5 apparatus with a Tamb of -20 to 60°C. 3. TYPE 'nL' CERTIFICATION 'L' indicates that the BA324ND uses an energy- 3.1 Certificate of Conformity... -
Page 5: System Design For Zone
The BA324ND indicator may be driven from any 4/20mA signal to provide remote indication. Fig 3 shows a typical application in which the output from a gas analyser drives a BA324ND. Again it is necessary to ensure that the loop complies with design... -
Page 6: Remote Indication
Connect the field wiring to the terminals as shown in Fig 5. 5. INSTALLATION Replace the instrument terminal cover and evenly tighten the two 'A' screws. 5.1 Location The BA324ND indicator is housed in a robust IP66 glass reinforced polyester (GRP) enclosure incorporating an armoured glass window and stainless steel fittings. -
Page 7: Emc
CAUTION! Additional immunity obtained connecting the BA324ND earth terminal to a local The four push-buttons are energy earth, or to a cable screen which is earthed in the limited and will not cause ignition in safe area. normal operation. Ex 'n' certification... -
Page 8: Summary Of Programmable Functions
See section 6.5 BA324ND indicators supplied calibrated as requested at the time of ordering. If calibration is not requested, the indicator will be set... -
Page 9: Root Extractor
Below 5% of be periodically calibrated. flow the BA324ND display is forced to zero. See section 6.7.2 % of full flow Current output mA 4.04 'C - - P' Function of P push-button 10.0... -
Page 11: Calibration Of Internal References
When all the digits have been adjusted, press E to 6.7 Conditioning sub-menu: Cond enter the new zero. The indicator will display 'Ent' This sub-menu allows the mains (line) frequency at for a few seconds while the information is being which the indicator has maximum ac rejection to stored in memory, and will then return to the 'ZErO' be selected and the two internal references to be... -
Page 12: Function Of The P Push-Button
The accuracy of the internal references, and hence To gain access to the security code link, remove the display accuracy, will depend upon the the instrument control cover, and if fitted unplug accuracy of the external current source. With a the external switch connector. -
Page 13: Using An External Current Source
Select frequency of maximum mains (line) rejection The following examples illustrate the two ways in Scroll though the main menu until which a BA324ND indicator may be calibrated. 'Cond' is displayed. Enter the sub- menu by pressing P twice and select 7.1 Using an external current source... -
Page 14: Using The Internal References
7.2 Using the internal references Step 5 Position dummy decimal point As in 7.1 the BA324ND is required to display: Select 'd.P' from the main menu and then press P. Using the Up and -50.0 with a 4mA input Down... -
Page 15: Maintenance
No display Incorrect Check that a current and no volts wiring or is flowing in the loop. If a BA324ND fails after it has been functioning between no power correctly, the following table may help to identify terminals supply. the cause of the failure. -
Page 16: Servicing
8.5 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. 8.6 Customer comments... -
Page 17: Accessories
The BA324ND can also be supplied with a blank or 9.2.1 Solid state output custom engraved stainless steel plate secured to Each alarm has a galvanically isolated single pole the instrument terminal cover by two screws. -
Page 18: Programming And Adjustment
9.2.3 Programming and adjustment indicator display mode, and defines a When an alarm card is added to a BA324ND the separate security code. main programme menu is extended as shown in See section 9.2.11 Fig 11. - Page 19 9.2.4 Alarm enable: EnbL This function allows the alarm to be enabled or disabled without altering any of the alarm parameters. To check or change the function select 'EnbL' from the alarm menu and press P which will reveal the current setting. The function can be changed by pressing the Up or Down button followed by the E button to return to the alarm menu.
- Page 20 9.2.7 Alarm output status: no.nc 9.2.8 Hysteresis: HStr This function allows the alarm output to be open or During programming hysteresis is shown in the closed in the alarm condition. When deciding units the indicator has been calibrated to display. which is required, care must be taken to ensure To adjust the hysteresis, select 'HStr' from the that the alarm output is fail safe.
- Page 21 9.2.9 Alarm delay: dELA If 'OFF' is selected, the operator will not have This function enables activation of the alarm output access to the setpoints from the display mode. to be delayed for a fixed time following the alarm condition occurring.
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Page 22: Adjusting Alarm Setpoints From Display Mode
9.2.12 Adjusting alarm setpoints from the When the required setpoint has been entered, display mode pressing E will return the display to the 'SP1' or Access to the alarm setpoints from the indicator 'SP2' prompt from which the other setpoint may be display mode is obtained by operating the P and selected, or the indicator may be returned to the Up push-buttons simultaneously as shown in Fig... -
Page 23: Calibration Using An External Current Source
9.3.1 Calibration using an external current When the required number of break-points has source been entered, return to the sub-menu by pressing This method allows direct calibration with a current The indicator will display 'Add' or 'dEL' source, and is preferred when traceability is depending upon the last function used. -
Page 25: Tare Function
Display Description of function To enter the required display at any break-point select 'diSP' from the sub-menu and press P which 'Add' Add a break-point will select the first break-point '0 n', where 'n' is the Adds a new break-point before the total number of break-points selected. -
Page 26: Display Backlights
4/20mA measuring circuit as shown in Fig 16. backlight safety components will ensure that the normal operation the voltage and current applied to maximum input current and power are within the terminals 1 and 13 of the BA324ND must not safety limits. exceed: 6V dc... -
Page 27: External Switches
9.7 Pipe mounting kits Two pipe mounting kits are available for securing the BA324ND to a horizontal or vertical pipe. BA392D Stainless steel bracket secured by two worm drive hose clips. Will clamp to pipe...
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