Related Manuals for BEKA BA354ND
Summary of Contents for BEKA BA354ND
- Page 1 BA354ND Type n certified 4/20mA loop-powered field mounting rate totaliser issue 3 Issue: November 2009...
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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 BA354ND is CE marked to show compliance with the European Explosive Atmospheres Directive 94/9/0 and the European EMC Directive 2004/108/EC... -
Page 3: Description
1. DESCRIPTION The BA354ND is an Ex nL certified 4/20mA loop- powered rate totaliser primarily intended for use with flowmeters. The instrument simultaneously displays the rate of flow represent by the 4/20mA input current and the total flow in engineering units on two separate displays. -
Page 4: Displays
30mA dc. See section 6.15 3.4 Reset terminals 2.2 Displays The BA354ND total display may be reset to zero The BA354ND has two digital displays and by connecting a switch between reset terminals associated annunciators, plus a flow indicator as RS1 and RS2. -
Page 5: Zones, Gas Groups And T Rating
30mA. In the example shown in Fig 2, the maximum current is This allows the BA354ND to be installed in Zone 2 determined by the maximum output from the hazardous areas (low risk) and to be used with flowmeter. -
Page 6: Remote Indication
Zone 2 hazardous area. Fig 3A shows a typical application in which the 4/20mA output from a powered flowmeter drives a BA354ND. Again it is necessary to ensure that the Fig 3B Remote indication from flowmeter in... -
Page 7: Installation
Fig 5. 5.1 Location e. Replace the instrument terminal cover and The BA354ND rate totaliser is housed in a robust evenly tighten the two 'A' screws. IP66 glass reinforced polyester (GRP) enclosure incorporating an armoured glass window and stainless steel fittings. - Page 8 Fig 5 Dimensions and terminal connections...
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Page 9: Programming And Calibration
'SCALE-t' is a wide range programmable dividing factor allowing the rate and total displays to be in different units. For example, if a BA354ND is displaying rate in litres per minute, setting 'SCALE-t' to 4.5461 produces total display gallons. -
Page 12: Summary Of Programmable Functions
Also enables a complete loop to be BA354ND will be set to display a rate of 0.00 with calibrated from primary element to the 4mA input and 100.00 with 20mA input. The total indicator display. scale factor will be set to 1.0000 with a timebase of When used with an accurate traceable flow per second. - Page 13 Display Description of function Display Description of function 'Cond' Indicator conditioning This is a protected sub-menu which 'SCALE-T' Total Scale Factor contains the calibration routine for the Defines the arithmetic relationship two internal references 'rEF', and the between the rate and total displays. mains (line) frequency...
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Page 14: Root Extractor
4/20mA output. The root extractor linearises the two displays. When both decimal points have flow signal enabling the BA354ND to display rate been correctly positioned press E to return to the and total flow in linear engineering units. main menu. -
Page 15: Calibration Of Rate Display Using
When the first digit is correct pressing P will transfer control to the next digit. When the 6.9.2 Calibration of internal references: rEF least significant digit has been adjusted, press E to BA354ND contains references return to the 'ZErO' prompt which completes the representing 4 and 20mA. -
Page 16: Function Of The P Push-Button
The grand total is a separate sixteen digit counter This parameter defines the function of the P push- which duplicates the total display but is not zeroed button when the BA354ND is in the operating when the total display is reset to zero. The grand mode. -
Page 17: Percentage Clip-Off
6.15 Local reset of total display: LOC. rSET This function enables the operator to reset the BA354ND total display to zero by operating the Up and Down push-buttons simultaneously. check the status of the local reset function select 'LOC. -
Page 18: Over And Under-Range
20mA at a flow of 1100 litres / minute. If the input current falls below approximately 3mA BA354ND is required to display flow in litres per the instrument initialisation sequence is performed minute and total flow in cubic metres with a as described in section 2. - Page 19 Step 4 Select frequency of maximum Step 8 Calibrate the rate display mains (line) rejection Scroll through the main menu until Scroll though the main menu until 'CAL' is displayed. Press P and the 'Cond' is displayed and press P which instrument will request a 4mA input by will result in the instrument displaying displaying 'ZErO'.
- Page 20 E to return to the main menu. the operating mode by pressing E. All the BA354ND programming functions will now be stored in permanent Step 11 Define percentage clip-off memory and protected from accidental Totalisation is to be inhibited at flow adjustment by the security code.
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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 BA354ND 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... -
Page 22: Maintenance
1 and 3 in the loop. If a BA354ND fails after it has been functioning Insufficient loop Check supply voltage to operate voltage and correctly, the following table may help to identify... -
Page 23: Servicing
Depending upon implemented. accessories fitted, one spare display assembly may be used to repair any BA354ND rate totaliser which fails. To replace the display assembly remove the terminal cover by unscrewing the two 'A' screws which will reveal two concealed 'D' screws. -
Page 24: Accessories
BEKA associates The BA354ND can also be supplied with a blank or custom engraved stainless steel plate secured to Fig 9 Rate alarm outputs the instrument terminal cover by tamperproof screws. -
Page 25: Type N Certification
9.2.3 Programming and adjustment When a BA354ND is supplied with alarms the main programme menu is extended as shown in Fig 12. The two alarm functions appear between the 'C--P' and the 'SCALE-t' functions, and each alarm may be programmed as a rate or a total alarm. - Page 26 Fig 12 Alarm programme menu Display Description of function 9.2.4 Alarm enable: EnbL This function allows the alarm to be enabled or 'dELA' Alarm delay time disabled without altering any of the alarm Adjusts the delay between the display parameters. To check or change the function equalling the setpoint and the alarm select 'EnbL' from the alarm menu and press P...
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Page 27: Setpoint Adjustment
The rate alarm setpoints SPr1 and SPr2 may be the alarm menu. positioned anywhere between 0 and 20000 e.g. A BA354ND calibrated to display a flow of 0 providing this corresponds to an input current to 5000, with a high alarm set at 4000 and between 3.8 and 20.2mA. -
Page 28: Access Setpoint
To adjust the alarm silence time select 'SIL' from 9.2.13 Adjusting alarm setpoints from the the alarm menu and press P which will reveal the display mode existing time. Each digit can be adjusted using the Access to the two alarm setpoints from the Up and Down push-buttons, and the P button to indicator display mode is obtained by operating the move to the next digit. -
Page 29: Display Backlight
Two pipe mounting kits are available for securing The BA354ND can be supplied with the BA354ND to a horizontal or vertical pipe. backlighting to improve display contrast when the instrument is installed in a poorly illuminated area. BA392D Stainless steel bracket secured by two... -
Page 30: Index
INDEX Subject Section Subject Section AC rejection ‘FrE’ 6.9.1 ‘LOC.rSEt’ 6.15 ‘AcSP’ 9.2.3; 9.2.12 Location Alarms optional access ‘AcSP’ 9.2.3; 9.2.12 Maintenance contacts ‘no.nc’ 9.2.3; 9.2.8 routine delay time ‘dELA’ 9.2.3; 9.2.10 Mounting kits enable ‘EnbL’ 9.2.3; 9.2.4 pipe function ‘HI.LO’ 9.2.3;...
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