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Summary of Contents for BEKA BA358C
- Page 1 BA358C Intrinsically safe 4/20mA loop powered panel mounting rate totaliser Issue 4 Certification information label Total display Rate display Rotating flow Annunciators for indicator optional alarms Issue: October 2010...
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Page 2: Table Of Contents
6.13 Total scale factor 6.14 Percentage clip-off 6.15 Local reset of total display 6.16 Security code 6.17 Over and under-range The BA358C 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 Rate display and totaliser start to function The BA358C is an intrinsically safe 4/20mA using calibration information stored in the loop-powered rate totaliser primarily instrument's permanent memory. intended for use with flowmeters. instrument simultaneously displays the rate If the 4/20mA current is disconnected during... -
Page 4: Displays
While this button is pushed the rate 3.1 ATEX certificate display will show the input current The BA358C has been issued with an EC- in mA, or as a percentage of the Type Examination Certificate by Notified instrument span depending upon... -
Page 5: Reset Terminals
Up and Down push- is –20 to +60 buttons are operated simultaneously. This allows the BA358C to be installed in all To reset the total display from the safe area Zones and to be used with most common a Zener barrier or intrinsically safe relay is industrial gases. -
Page 6: System Design For Hazardous Areas Atex Certification
4.2 Remote indication A BA358C may be driven via an intrinsically safe interface from a 4/20mA safe area signal to provide a remote indication of rate and total flow within a hazardous area. The type of interface is not critical, either a Zener... -
Page 7: Resetting The Total Display
500V dc insulation test so that it complies with the requirements for simple apparatus. Zener barrier or galvanic isolator is required. The BA358C may also be programmed to reset the total display to zero when the Up Down buttons operated simultaneously -see 6.15... -
Page 8: Installation
Fig 4 shows the overall dimensions of the BA358C and the panel cut-out. To achieve an IP65 seal between the instrument enclosure and the panel the smaller cut-out must be used and the instrument secured with four panel mounting clips. -
Page 9: Programming And Calibration
P and E push-buttons simultaneously. If the instrument is not For example, if a BA358C is displaying rate protected by a security code the first in litres per minute, setting 'SCALE-t' to parameter 'root' will be displayed. -
Page 10: Summary Of Programmable Functions
All new BA358C rate totalisers are supplied See section 6.5 calibrated as requested at the time of ordering. If calibration information is not supplied, the BA358C will be set to display a 'd.P.' Decimal points rate of 0.00 with 4mA input and 100.00 with Defines position 20mA input. -
Page 11: See Section 6.8
Display Description of function Display Description of function 'SEt' Calibration of rate display 'SCALE-t' Total Scale Factor using internal references. Defines arithmetic Enables the zero and span of the relationship between the rate rate display to be adjusted and total displays. May be without the need for an accurate adjusted between 0.0001 and... -
Page 14: Calibration Of The Rate Display Using An External Current Source
The root toggle control between the two displays. extractor linearises the flow signal and When both decimal points have been enables the BA358C to display flow and total correctly positioned press E to return to the in linear units. main menu. -
Page 15: Calibration Of The Rate Display Using Internal Reference
6.9.2 6.9.2 Calibration of internal references: To calibrate the rate display select 'SEt' from the main menu and press P. The instrument BA358C contains references will display 'ZErO', pressing P again will representing 4 and 20mA. These are used reveal the current display at 4mA. -
Page 16: Function Of The P Push-Button
2.1 of C - - P this manual. This parameter defines the function of the P push-button when the BA358C is in the The grand total counter can only be reset to display mode. Either the input current in zero from the 'CLr.Gtot' function within the... -
Page 17: Percentage Clip-Off
UK gallons LOC. rSET When turned on this function enables the 1 litre 1 litre operator to reset the BA358C total display to 1 gallon 1/(4546.1) litres zero by operating the Up and Down push- buttons simultaneously. To check the SCALE-t = 4546.1... -
Page 18: Over And Under-Range
7.1 Calibration example Using an external current source In this example the BA358C rate totaliser is connected to a flowmeter having an output of 20mA at a flow of 1100 litres / minute. The BA358C is required to display flow in litres per minute and total flow in cubic metres with a resolution of 0.1 cubic metres. - Page 19 Step 3 Turn square root extractor off required total display resolution of With 'root' displayed, press P which will reveal the root extractor status. The root extractor can be turned on Press P to move control to the rate or off by operating the Up or Down display.
- Page 20 Step11 Define percentage cut-off operating mode by pressing E. All Totalisation is to be inhibited at BA358C programming flow rates below 1% of maximum functions will now be stored in flow. To define this cut-off point permanent memory and protected select ‘CLIP-OFF' from the main...
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Page 21: Using The Internal References
7.2 Calibration example Using the internal references In this example the internal references within the BA358C are used to calibrate the rate display. Except for steps 1, 2 and 8 the procedure is identical to that in the previous example in section 7.1 The advantages of... -
Page 22: Maintenance
It is helpful if a brief description of the fault symptoms is provided. If a BA358C fails after it has been functioning correctly, the following table may help to identify the cause of the failure. -
Page 23: Accessories
9. ACCESSORIES 9.1 Scale card The BA358C has a window on the right hand side of the display to hold a card showing the units of measurements e.g. Litres, Gallons, M . Instruments can be supplied with a printed scale card showing any units specified at the time of ordering. -
Page 24: Intrinsic Safety
Zener barrier or galvanic isolator providing that the output 9.3.3 Programming and adjustment parameters of each circuit do not exceed: When a BA358C is supplied with alarms the main programme menu is extended as 28V dc shown in Fig 12. -
Page 25: Alarm Enable
Summary of programmable alarm 9.3.4 Alarm enable: EnbL functions This function allows the alarm to be enabled or disabled without altering any of the alarm parameters. To check or change the Display Description of function function select 'EnbL' from the alarm menu 'EnbL' Alarm enable and press P which will reveal the current... -
Page 26: Alarm Output Status
When During programming hysteresis is shown in deciding which is required, care must be the units of rate the BA358C has been taken to ensure that the alarm output is fail calibrated to display. -
Page 27: Alarm Delay
9.3.10 Alarm delay: dELA select 'AcSP' from the programme menu and This function enables activation of the alarm press P which will display the enable prompt output to be delayed for a fixed time 'EnbL'. Press P again to reveal if the direct following the alarm condition occurring. -
Page 28: Display Backlight
Fig 14 Backlight powered by Zener barrier the BA358C may be returned to the display mode by pressing E again. The display brilliance depends upon the Direct access to the alarm setpoints is only current flowing through the backlight. -
Page 29: Additional Front Panel Protection
9.5 Additional front panel protection Although the BA358C has an IP65 sealed front panel, for installations in hostile environments where the instrument is likely to be damaged by impact an additional front cover is available. The BA398 is a robust transparent cover which is secured to the panel by six screws and sealed with a neoprene gasket. -
Page 30: Index
INDEX Subject Section Subject Section AC rejection ‘FrE’ 6.9.1 Input 4/20mA ‘AcSP’ 9.3.3; 9.3.12 Internal references 6.3; 6.9 Alarms optional Installation access ‘AcSP’ 9.3.3; 9.3.12 Intrinsic safety 1.0; 3.0; 9.3.2; contacts ‘no.nc’ 9.3.3; 9.3.8 9.3.2 delay time ‘dELA’ 9.3.3; 9.3.10 enable ‘EnbL’...
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