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9.3 Display backlight

The BA554E loop powered Rate Totaliser can be
supplied with a factory fitted backlight that may be
loop or separately powered.

When loop powered the backlight produces green
background illumination enabling the display to be
read at night or in poor lighting conditions. No
additional power supply or field wiring are required,
but the Rate Totaliser voltage drop is increased.
When separately powered the backlight is brighter,
but an additional intrinsic safety interface and field
wiring are required.

Fig 15 Terminals for optional backlight

9.3.1 Loop powering the backlight

The backlight is loop powered by connecting it in
series with the Rate Totaliser’s 4/20mA input as
shown in Fig 16, which increases the maximum
Rate Totaliser voltage drop from 1.2 to 5V.

Fig 16 Loop powered backlight

9.3.2 Separately powering the backlight

The optional backlight may also be powered from a
separate safe area power supply via an intrinsically
safe interface as shown in Fig 17.

Fig 17 Separately powered backlight

When separately powered the backlight is a
current sink drawing a constant current when the
supply is equal to or greater the minimum specified
voltage. Below this supply voltage the backlight
continues to function but with reduced brilliance.

Current Minimum voltage

35mA

11V

9.4 External keypad

For applications requiring frequent access to the
configuration menus, the BA554E Rate Totaliser
can be supplied with an external membrane
keypad. This maintain the IP66 integrity of the
enclosure while enabling all functions to be
configured and controlled without removing the
enclosure control cover.

9.5 Pipe mounting kits

Two pipe mounting kits are available for securing
the BA554E to a horizontal or vertical pipe.

BA392D Stainless steel bracket secured by two

worm drive hose clips. Will clamp to
any vertical or horizontal pipe with an
outside diameter between 60 and
80mm.

BA393

Heavy duty stainless steel bracket
secured by a single 'V' bolt. Will clamp
to any vertical or horizontal pipe with an
outside diameter between 40 and
80mm.

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Summary of Contents for BA554E

Page 1: ...Issue 3 4th July 2014 BA554E General Purpose 4 20mA loop powered field mounting Rate Totaliser Issue 3 ...

Page 2: ...urce 6 1 1 Example Adding break points to a new Rate Totaliser 6 2 Calibration using internal reference 6 2 1 Example Adding break points to a new Rate Totaliser 6 3 Error messages 6 4 Under and over range 6 5 Default configuration 7 Calibration Examples 7 1 Using an external current source 7 2 Using the internal reference 8 Maintenance 8 1 Fault finding during commissioning 8 2 Fault finding afte...

Page 3: ... twelve seconds All segments of the display are activated Loading message displayed Configuration message displayed Model and firmware version displayed Rate Totaliser starts functioning using configuration information stored in instrument s permanent memory Unless total and grand total displays have been reset to zero new flow will be added to the existing totals If the 4 20mA current is disconne...

Page 4: ... then clear the grand total and Gt CLrd will be displayed to confirm the operation The instrument will then automatically return to the operating mode Selectable function in the configuration menu See section 5 17 Note Totalisation will continue until CLr no or CLr YE5 are displayed Resets the total display to zero when these two push buttons are operated simultaneously Selectable function in the ...

Page 5: ...reset to zero by momentarily connecting the reset terminals RS1 and RS2 together with a resistance of less than 1kΩ as shown in Fig 2 Note The negative reset terminal RS2 is internally connected to the negative 4 20mA input terminal 3 The total display may also be reset to zero by operating the totalisers and push buttons simultaneously for more than two seconds See section 5 17 3 3 Remote flow in...

Page 6: ...als 5 and 6 are internally joined and may be used for linking cable screens The Rate Totalisers earth terminal is connected to the carbon loaded GRP enclosure If this enclosure is not bolted to an earthed post or structure the earth terminal should be connected to the plant potential equalising conductor The enclosures are fitted with a bonding plate to ensure electrical continuity between the thr...

Page 7: ...3 EMC The BA554E complies with the requirements of the European EMC Directive 2004 108 EC For specified immunity all wiring should be in screened twisted pairs with the screens connected at one point to the plants potential equalising conductor 7 ...

Page 8: ...y be linearised using the square root extractor or the 16 segment lineariser which are selectable in the instrument s FunC block The rate display may then be calibrated using the CAL or 5Et functions to show the flow rate in the required linear engineering units Both the zero display at 4mA and the span display at 20mA are adjustable although for flow application the display at 4mA is usually zero...

Page 9: ...be entered using the and push buttons and the P button to move control to the next digit When the correct four digit code has been entered pressing E will cause the first parameter FunC to be displayed If the code is incorrect or a button is not pressed within twenty seconds the Rate Totaliser will automatically return to the display mode Once within the configuration menu the required parameter c...

Page 10: ... on or oFF See section 5 8 dP Decimal points Positions the decimal point in the rAtE and totAL displays See section 5 9 Display Summary of function CAL Calibration of the rate display using an external current source Enables the zero and span of the rate display to be adjusted using an external current source such as a calibrator When used with an accurate traceable calibrator this is the preferre...

Page 11: ...and Gt rE5Et t rE5Et enables the total display to be reset to zero when and push buttons are operated simultaneously for more than 2 seconds Gt rE5Et enables the grand total to be reset to zero when E and push buttons are operated simultaneously for more than 10 seconds See section 5 17 CodE Security code Defines a four digit numeric code that must be entered to gain access to the configuration me...

Page 12: ...12 ...

Page 13: ...earity with bi directional flow Use of the lineariser is described in section 6 of this instruction manual 5 5 Display resolution rE5n This function defines the resolution of the least significant display digit of the rate display Decreasing the display resolution can improve the readability of a noisy signal Select rE5n from the menu and press P which will reveal the current display resolution To...

Page 14: ...ay and identify the lower display variable but on the larger upper display The position of the decimal point can be positioned in the same way by operating the and push buttons when set as required enter the setting and return to the conditioning menu by operating the E button 5 10 Calibration of the rate display using an external current source CAL This function enables the zero and span of the r...

Page 15: ...as been activated see section 5 17 To zero the grand total from within the configuration menu select Clr Gtot and press P which will cause the instrument to display Clr no Press the or button until CLr YES is displayed and then press P which will result in a 0000 prompt Using the and buttons and the P button to move to the next digit enter 5urE digit by digit to confirm the instruction Pressing E ...

Page 16: ... the decimal point repeatedly operate the P button until the decimal point starts flashing The decimal point can then be positioned by pressing the or button When the required total scale factor has been set press E to enter the number and return to the 5CALE t prompt in the configuration menu 5 16 Clip off CLiP oFF To prevent totalisation of very low flow rates which over long periods may result ...

Page 17: ...ay the existing security code with one digit flashing The flashing digit can be adjusted using the and push buttons when set as required operating the P button will transfer control to the next digit When all the digits have been adjusted press E to return to the CodE prompt in the configuration menu The revised security code will be activated when the Rate Totaliser is returned to the display mod...

Page 18: ...Lineariser calibration using an external current source This method allows direct calibration of the lineariser with an external current source and is the preferred method when traceability is required If the exact system non linearity is unknown this method also allows direct calibration from the variable to be displayed The number of break point required should first be entered using the Add and...

Page 19: ...19 ...

Page 20: ...ollowing break point 6 1 1 Example Adding break points to a new Rate Totaliser When adding break points to a new Rate Totaliser or to a lineariser following resetting to the factory defaults using the LtAb function described in section 6 19 each additional break point should be added before the highest existing breakpoint The first additional break point should be added before the default break po...

Page 21: ...he E button The corresponding rate display at each of the break points can now be defined using the diSP sub function Using the and buttons select the diSP sub function and press P which will reveal the starting point for the first break point 0 n where n is the total number of break points entered Press P and use the and buttons and the P button to move between digits to enter the required rate d...

Page 22: ...her the root extractor or the lineariser are required The standard linear relationship should therefore be selected With FunC displayed press P which will reveal the existing function Using the or button select 5td Press E to enter this selection and return to the FunC prompt in the configuration menu Step 4 Define function of P push button Select C P from the configuration menu and press P to rev...

Page 23: ... the totaliser scaling factor In this example the rate display is in litres per minute but the total display is required in cubic metres 5CALE t Units of rate display Units of total display There are 1 000 litres in a cubic metre thus litres cubic metres 1 litre 1 1000 litres 5CALE t 1000 From the configuration menu select 5CALE t and press P to reveal the current five digit dividing factor Using ...

Page 24: ...n and total flow in cubic metres with a resolution of 0 1 cubic metres Total is to be shown on the upper large display and rate on the lower smaller display Totalisation is to occur for flow rates between 1 and 100 of maximum flow A security code of 1209 is required In the operating mode the BA554E is required to display the input current as a percentage of span when the P push button is operated ...

Page 25: ...rminals 1 3 or terminals 3 12 if optional backlight is loop powered No power supply Confirm that a 4 20mA current is flowing in the loop Unstable rate display 4 20mA current is noisy or the flow signal is unstable Eliminate source of electrical noise Reduce resolution of the rate display to mask flow noise Unable to access configuration menu Incorrect security code Enter the correct security code ...

Page 26: ...strument enclosure This plate can accommodate 1 row of 9 alphanumeric characters 10mm high or 1 row of 11 alphanumeric characters 7mm high or 2 rows of 18 alphanumeric characters 5mm high 9 2 Alarms CAUTION These alarms outputs should not be used for critical safety applications such as an emergency shut down system The BA554E Rate Totaliser can be supplied with factory fitted dual alarms with sol...

Page 27: ...sed and current will only flow in one direction Ron less than 5Ω 0 7V Roff greater than 1MΩ Fig 11 Equivalent circuit of each alarm output The solid state output of each alarm may be used to switch any dc circuit with parameters equal to or less than V 40V I 200mA Fig 12 Typical alarm application Shown without recommended screened cables 27 ...

Page 28: ...28 ...

Page 29: ...ivated when the selected display rate or total equals the setpoint See section 9 2 5 Hi Lo Alarm function Defines the alarm function as High or Low See section 9 2 6 no nC Normally open or normally closed output Sets the alarm output open or closed in the non alarm condition See section 9 2 7 H5tr Hysteresis Adjusts the alarm hysteresis Only available on rate alarms See section 9 2 8 dELA Alarm de...

Page 30: ...by pressing the or button followed by the E button to return to the alarm menu 9 2 7 Alarm output status no nC Configures the solid state alarm output to be open no or to be closed nC in the non alarm condition When deciding which is required care should be taken to ensure that the alarm output is fail safe as illustrated in Fig 10 no Alarm output open in non alarm condition nC Alarm output closed...

Page 31: ...rate or total display depending upon which has caused the alarm alternates between the numerical value and the alarm reference ALr1 or ALr2 when the alarm output is activated If both alarm outputs are activated by one variable the display alternates between the numerical value and Alr1 2 To enable or disable the function select FL5H from the alarm menu and press P which will reveal the current set...

Page 32: ...n to the display mode Fig 14 Setpoint adjustment from the display mode To adjust an alarm setpoint select 5Px1 or 5Px2 and press P which will reveal the current setting Each digit of the setpoint may be adjusted using the and push buttons and the P button to move control to the next digit When the required setpoint has been entered pressing E will return the display to the 5Px1 or 5Px2 prompt from...

Page 33: ...pply via an intrinsically safe interface as shown in Fig 17 Fig 17 Separately powered backlight When separately powered the backlight is a current sink drawing a constant current when the supply is equal to or greater the minimum specified voltage Below this supply voltage the backlight continues to function but with reduced brilliance Current Minimum voltage 35mA 11V 9 4 External keypad For appli...

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