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Issue: 3

July 2014

BA354NE

Type nA

4/20mA loop-powered

field mounting

Rate Totaliser

Issue 3

Содержание BA354NE

Страница 1: ...Issue 3 3rd July 2014 BA354NE Type nA 4 20mA loop powered field mounting Rate Totaliser Issue 3...

Страница 2: ...to a new indicator 7 2 Lineariser calibration using internal reference 7 2 1 Example Adding break points to a new indicator 7 3 Lineariser error message 7 4 Under and over range 7 5 Lineariser default...

Страница 3: ...strument The voltage developed across R1 which is proportional to the 4 20mA input current provides the input signal for the analogue to digital converter Each time a 4 20mA current is applied to the...

Страница 4: ...n 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 sec...

Страница 5: ...TEX installations in explosive gas atmospheres conforming with EN60079 14 Electrical Installations in Hazardous Areas When designing systems for installation outside the UK the local Code of Practice...

Страница 6: ...uit that defines the voltage developed between the input terminals 1 and 3 therefore the ATEX certificate does not specify a maximum safety input voltage Ui 3 4 Reset terminals The input safety parame...

Страница 7: ...ous area should be individually fused and contain a means of isolation However in practice instrumentation energised by a current limited power supply or instrument that can be switched off is often c...

Страница 8: ...0V rms insulation test for one minute The switch button must comply with the electrostatic requirements specified by Clause 7 of EN60079 0 and material composition defined in Clause 8 If the totaliser...

Страница 9: ...ded 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 enclosure is fitted with a bond...

Страница 10: ...rised using the square root extractor or the 16 segment lineariser which are selectable in the instrument s FunC sub menu The rate display may then be calibrated using the CAL or 5Et functions to show...

Страница 11: ...e 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...

Страница 12: ...on or oFF See section 6 8 dP Decimal points Positions the decimal point in the rAtE and totAL displays See section 6 9 Display Summary of function CAL Calibration of the rate display using an external...

Страница 13: ...nd 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...

Страница 14: ...14...

Страница 15: ...arity with bi directional flow Use of the lineariser is described in section 7 of this instruction manual 6 5 Display resolution rE5n This function defines the resolution of the least significant disp...

Страница 16: ...y 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 ent...

Страница 17: ...s been activated see section 6 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...

Страница 18: ...low rates which over long periods may result in significant totalisation errors the BA354NE rate display can be conditioned to stop totalisation when the flow rate falls below a specified clip off thr...

Страница 19: ...Rate Totaliser is returned to the display mode Please contact BEKA associates sales department if the security code is lost 6 19 Reset to factory defaults r5Et This function enables the Rate Totaliser...

Страница 20: ...ineariser 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...

Страница 21: ...21...

Страница 22: ...llowing break point 7 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...

Страница 23: ...e 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 th...

Страница 24: ...ither 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 b...

Страница 25: ...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...

Страница 26: ...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 betw...

Страница 27: ...ed by risk analysis or when there is no risk of a flammable atmosphere being present If an Rate Totaliser fails after it has been functioning correctly follow the procedure shown in section 9 1 If thi...

Страница 28: ...of the existing escutcheon Do not remove the original escutcheon The BA354NE Rate Totaliser can also be supplied with a blank or custom laser engraved stainless steel plate secured by two screws to th...

Страница 29: ...dc Ii 200mA This allows each alarm output to switch any dc circuit providing that in normal operation the maximum supply voltage is not greater than 30V and the switched current is not greater than 2...

Страница 30: ...30...

Страница 31: ...ted when the selected display rate or total equals the setpoint See section 10 3 6 Hi Lo Alarm function Defines the alarm function as High or Low See section 10 3 7 no nC Normally open or normally clo...

Страница 32: ...y pressing the or button followed by the E button to return to the alarm menu 10 3 8 Alarm output status no nC Configures the solid state alarm output to be open no or to be closed nC in the non alarm...

Страница 33: ...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 ar...

Страница 34: ...5Px1 or 5Px2 prompt from which the other setpoint may be selected or the Rate Totaliser may be returned to the display mode by pressing E again Notes 1 With the Rate Totaliser in the display mode dire...

Страница 35: ...Separately powered backlight The separately powered backlight is a current sink which will draw a constant 35mA when the supply voltage is equal to or greater than 11V At lower supply voltages the ba...

Страница 36: ...A392D 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 s...

Страница 37: ...2 flammable gas atmosheres may also be used for Zone 22 combustible dust applications The Rate Totaliser should be located where the minimum amount of dust will accumulate on the enclosure and the in...

Страница 38: ...ified operating temperature of the BA354NE is 20 to 70 C At temperatures below 20 C the instrument will continue to totalise but the display will not function The specified gas and dust safety paramet...

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