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BEKA BA334E Скачать руководство пользователя страница 41

41

To  determine  the  maximum  permissible  cable
parameters  Ci  should  be  subtracted  from  the
maximum  permitted  external  capacitance  Co
specified by the certificate for the intrinsically safe
interface  powering  the  alarm  circuit,  such  as  the
solenoid driver and switch transfer galvanic isolators
shown in Fig 16.

Fig 16 Typical alarm application

10.3.3 Configuration and adjustment

When a BA334G Rate Totaliser is fitted with alarms
the configuration menu is extended as shown in
Fig 17. The alarm functions appear after

clr gtot,

and each alarm may be configured to operate on the
rate or total display.

For simplicity Fig 17 only shows the configurable
functions on the rate option of alarm

AL1

, the total

options is identical except that total alarms do not
have hysteresis. Alarm

AL2

is identical to alarm

AL1

.

The following table summarises each of the alarm
configuration functions and includes a cross
reference to more detailed information. Again only
alarm

AL1

functions are listed.

Display

Summary of function

EnbL

Alarm enable

Enables or disables the alarm without
changing the alarm parameters.
See section 10.3.4

tYPE

Type of alarm

Defines whether the alarm operates
on the rate or total display.
See section 10.3.5

5P1r

Alarm setpoint 1

or

Adjusts the alarm setpoint. The alarm

5P1t

is activated when the rate or total
display equals the setpoint.

Note:

5P1r

is displayed for a rate

alarm and

5P1t

for a total alarm.

See section 10.3.6

HI. LO

Alarm function

Defines whether the alarm has a high
or low function.
See section 10.3.7

no . nc

Normally open or normally closed
output.

Determines whether the single pole
alarm output is open or closed in the
non-alarm condition.
See section 10.3.8

H5tr

Hysteresis

Adjusts the alarm hysteresis. Only
available on a rate alarm.
See section 10.3.9

dELA

Alarm delay

time

Adjusts the delay between the display
equaling the setpoint and the alarm
output being activated.
See section 10.3.10

S5IL

Alarm silence time

Defines the time that the alarm output
remains in the non-alarm condition
following acceptance of an alarm.
See section 10.3.11

FL5H

Flash display when alarm occurs

When enabled, alternates the rate or
total display between process value
and alarm reference

Al1

or

Al2

when

an alarm output is activated.
See section 10.3.12

AC5P

Access setpoint

Sub-menu that enables direct access
to the alarm setpoints from the
totalisation mode and defines a
separate security code.
See section 10.3.13

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Содержание BA334E

Страница 1: ...Issue 1 7th February 2017 BA334G BA334E Intrinsically Safe Externally powered Rate Totaliser Issue 1 ...

Страница 2: ...iguration functions 6 4 Rate totaliser function function 6 5 Input input 6 6 Input type inp type 6 7 Debounce debounce 6 8 Display update interval update 6 9 Upper display di5p 1 6 10 Lower display di5p 2 6 11 Position of decimal points dp 6 12 Flowmeter K factor factor 6 13 Total scale factor 5cale t 6 14 Rate scale factor 5cale r 6 15 Timebase t ba5e 6 16 Display filter filter 6 17 Clip off clp ...

Страница 3: ...0 3 7 Alarm function hi lo 10 3 8 Alarm output status no nc 10 3 9 Hysteresis h5tr 10 3 10 Alarm delay dela 10 3 11 Alarm silence time 5il 10 3 12 Flash display fl5h 10 3 13 Access setpoint ac5p 10 3 14 Adjusting alarm setpoints from totalisation mode 10 4 4 20mA output 10 4 1 Intrinsic safety 10 4 2 System design 10 4 3 Configuration 10 4 4 Enable 4 20mA output enbl 10 4 5 Select rate or total so...

Страница 4: ...tion For applications in the USA and Canada the BA334G and BA334E have ETL cETL certification which is described in Appendix 3 The BA334G and BA334E simultaneously display the rate of flow and the total flow in the same or different engineering units The instruments are controlled and configured via the four front panel push buttons a user defined four digit code may be entered to prevent accident...

Страница 5: ... If Local Grand Total Reset CLr Gtot in the instrument configuration menu has been activated operating the and buttons for ten seconds will result in Clr no being displayed with the no flashing Operating the or button will change the display to CLr YE5 the button will then reset the grand total to zero which will be confirmed by a brief display of Gt Clrd See 6 20 If Local Total Reset CLr tot in t...

Страница 6: ...Body Intertek Testing and Certification Ltd have issued the BA334G with an EU Type Examination Certificate number ITS16ATEX28408X This confirms compliance with harmonised European standards and it has been used to confirm compliance with the European ATEX Directive for Group II Category 1G equipment Ex ia IIC T5 Ga equipment The Rate Totaliser carries the community mark and subject to local codes ...

Страница 7: ...rs that require energising to determine their state such as switch contacts or a 2 wire proximity detector in a turbine flowmeter an external link between terminals 3 4 of the BA334G connects an internal 7V 6mA supply to the input Energising is not required when the Rate Totaliser s input is connected to a voltage pulse source Fitting an external link between terminals 3 4 changes the output safet...

Страница 8: ...ergised input providing that a The flowmeter is a certified intrinsically safe device having input parameters equal to or greater than Uo 10 5V dc Io 9 2mA dc Po 24mW or complies with the requirements for simple apparatus b The flowmeter and associated wiring can withstand a 500V rms insulation test to earth c The flowmeter is located in the same hazardous area as the BA334G d Minimum operating vo...

Страница 9: ...terface between a safe and hazardous area However they require a high integrity earth connection that may be expensive to install and they do not provide isolation When a high integrity earth connection is not already available it may be less expensive and complicated to use galvanic isolators for the installation of a single BA334G Terminals 2 6 and RS2 of the BA334G Rate Totaliser are internally...

Страница 10: ...upply voltage in the safe area must be between 15 5V and the maximum working voltage of the Zener barrier which depending upon manufacturer will be approximately 26V Note The optional factory fitted display backlight increases the instrument s current consumption to 32mA and therefore increases the minimum safe area operating voltage see section 10 2 for details 4 1 2 Pulse input As shown in Figs ...

Страница 11: ...ion 6 7 4 1 6 Magnetic pick off input Flowmeters incorporating a magnetic pick off to sense flow will have a low level voltage output unless the flowmeter incorporates an amplifier CoiL in the BA334G input configuration menu is a low level voltage pulse input intended for use with an intrinsically safe magnetic pick off When a Rate Totaliser is configured for CoiL and terminals 3 4 are not linked ...

Страница 12: ...ously for more than three seconds in the totalising mode i e when the instrument is displaying flow See 6 19 4 2 Use with Galvanic Isolators Galvanic isolators are probably the simplest intrinsically safe interface to install as they provide isolation and do not require a high integrity earth connection Any galvanic isolator may be used with the BA334G providing it s certification is for use with ...

Страница 13: ...age pulse low 1 0V 3 0V Voltage pulse high 3 0V 10 0V Magnetic pick off 0mV 40mV peak Proximity detector 1 2mA 2 1mA Switch 100Ω 1000Ω Switch contacts proximity detectors and open collector sensors require energising which is achieved by linking terminals 3 and 4 together as shown in Figs 4 and 5 4 2 3 Switch contact input Any flowmeter with a mechanical or magnetically activated switch contact ou...

Страница 14: ...nstrument Three levels of de bounce protection are independently available See section 6 7 4 2 7 Voltage pulse input Two voltage pulse input ranges are independently selectable in the BA334G Rate Totalisers configuration menu VoLt5 L and VoLt5 H When configured for either of the voltage pulse ranges and terminals 3 4 are not linked the input terminals 5 6 comply with the requirements for simple ap...

Страница 15: ...r An insulated M4 stud is provided in the bottom right hand corner of the back box for interconnecting cable screens The BA334G Rate Totaliser may be pipe mounted using a BA393G pipe mounting kit or panel mounted using a BA394G or BA395G panel mounting kit 5 2 Installation Procedure Fig 6 illustrates the instrument installation procedure A Remove the Rate Totaliser assembly by unscrewing the four ...

Страница 16: ... the instrument is ordered a blank scale card will be fitted which can easily be marked on site with a dry transfer or a permanent marker Custom printed scale cards are available from BEKA associates as an accessory To remove the scale card from a Rate Totaliser carefully pull the transparent tab at the rear of the instrument assembly away from the assembly as shown in Fig 8a Fig 8a Removing scale...

Страница 17: ... configured totalisation continues so that any flow occurring during this time is recorded 6 1 Configuration structure Fig 9 shows the BA334G calibration structure The rate and total display calibrations are independent which allows the displays to have different engineering units The rate totaliser pulse input is divided by FACtor which is usually set to the K factor of the flowmeter thus convert...

Страница 18: ...configuration menu is shown diagrammatically in Fig 10 When returning to the totalisation mode following reconfiguration the Rate Totaliser will display dAtA followed by 5AVE while the new information is stored in permanent memory 6 3 Summary of configuration functions This section summarises all the configuration functions When read in conjunction with Fig 10 it provides a quick aid for configuri...

Страница 19: ...mber of litres in 1 000 imperial gallons 5CALE t may be adjusted between 0 0001 and 99999 The total flow display is independent of the rate display See section 6 13 Display Summary of function 5CALE r Rate scale factor 5CALE r is a dividing factor that converts the pulse output from FACtor into the required rate display in engineering units e g if the output from FACtor is one pulse per litre and ...

Страница 20: ...be restored See section 6 20 Display Summary of function CLr Gtot Reset grand total from configuration menu This function resets the grand total to zero from within the configuration menu when CLr YE5 is selected and 5urE is entered to confirm the instruction Note Once reset the grand total can not be recovered See section 6 21 CodE Security code Defines a four digit alphanumeric code which must b...

Страница 21: ...nd dEbounCE which configure the Rate Totaliser input and input noise rejection 6 6 Input type inP tYPE inP tYPE is a sub menu in the inPut function which defines the type of flowmeter or input pulse that the Rate Totaliser will count To check or change the type of input select inPut in the main configuration menu and press which will reveal the inP tYPE prompt pressing again will show the Rate Tot...

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Страница 24: ...s When the required level has been selected pressing twice will enter the selection and return the display to the inPut prompt in the configuration menu 6 8 Display update interval uPdAtE If either the rate or the total display is likely to change rapidly a longer interval between display updates may simplify reading the Rate Totaliser display This function allows one of six different display inte...

Страница 25: ...fer control to the decimal point that may be positioned between any of the digits or may be omitted by moving it to the right of the least significant digit When set as required press to return to the FACtor prompt in the configuration menu 6 13 Total scale factor 5CALE t 5CALE t is a dividing factor adjustable between 0 0001 and 99999 that enables total flow to be displayed in the required engine...

Страница 26: ...ble rate display stability and a fast response to a large rate signal change To check or change the filter select FiLtEr in the configuration menu and press which will reveal the existing settings with the first digit flashing Pressing the or button will change the flashing digit and will transfer control to the second digit While making adjustments the filtered rate display is shown on the lower ...

Страница 27: ...button to change the setting followed by the button twice to enter the change and return to the LoC clr prompt in the configuration menu 6 21 Grand total reset from configuration menu Clr Gtot The grand total is a separate sixteen digit counter which is incremented in parallel with the total display but is not zeroed when the total display is reset to zero The grand total may be viewed in the tota...

Страница 28: ... parameters The output therefore complies with the requirements for simple apparatus This allows pulse output terminals P1 and P2 to be connected to any intrinsically safe circuit protected by a certified Zener barrier or galvanic isolator providing the output parameters do not exceed Uo 28V dc Io 200mA dc Po 0 84W The equivalent capacitance and inductance of the pulse output are both zero which a...

Страница 29: ...output pulse frequency to be divided and the output pulse width duration to be defined 6 24 4 Pulse output PuL5E oP The pulse output is configured in a sub menu contained in the pul5e op function Using the or push button scroll though the configuration menu until PuL5E oP is displayed pressing will then access the pulse output sub menu which is shown in Fig 12 Fig 12 Pulse output configuration sub...

Страница 30: ...h button followed by the button to return to diVidE prompt in the sub menu Note This function only appears in the pulse output sub menu when the 5CALEd is selected in the 5ource sub function 6 24 6 6 24 8 Output pulse width durAtion When 5CALEd is selected in the 5ource sub function 6 24 6 the output pulse width is defined by this function One of following millisecond pulse widths may be selected ...

Страница 31: ...libration certificate specifying the average K factor and the flow range over which it applies For use over extended flow ranges and for non linear devices multiple K factors will be specified often in a table similar to the one shown below Flow Rate Litres min K factor Pulses litre 5 200 10 230 15 239 20 242 From this calibration certificate information the output frequency of the flowmeter which...

Страница 32: ...32 ...

Страница 33: ...one of four sub functions If Add is not displayed repeatedly press the or button to select Add followed by which will cause the current segment and the total number of lineariser segments to be displayed as shown below Each time the push button is operated a segment will be added to the lineariser If configuring the lineariser for the first time repeatedly press until the required total number of ...

Страница 34: ...put is divided by L FACtor which is adjustable between 0 0001 and 99999 for flow applications it should be set to the K factor of the flowmeter K factor is the number of pulses that the flowmeter produces per unit volume of flow e g 20 pulses per litre L FACtor therefore converts the flowmeter output into engineering units ready for further scaling to produce the required rate and total flow displ...

Страница 35: ...se protection If the Rate Totaliser is subsequently found to miscount the noise rejection can be increased Enter the selection and return to the inPut prompt in the configuration menu by pressing the button twice See 6 6 and 6 7 Step 4 Select the interval between display updates Using the or button select uPdAtE in the configuration menu and press to reveal how frequently the Rate Totaliser displa...

Страница 36: ...te to be displayed in the required engineering units The rate display timebase is determined by t bA5E that is adjusted in Step 11 In this example the rate of flow display is required in imperial gallons FACtor which was adjusted in Step 8 of this example produces an output in Litres that must be converted to imperial gallons There are 4 5461 Litres in an imperial gallon so 5CALE r should be adjus...

Страница 37: ...ll reveal the sub menu Again using the or button select the local total reset function clr tot and press This function is required so using the or button select on followed by to return to the clr tot prompt in the sub menu Using the or button select the local grand total reset function clr gtot and press This function is not required so using the or button select oFF Finally return to the loc clr...

Страница 38: ...econfigure clip off Alarms do not function Alarms have been disabled following calibration change Re enable both alarms 9 2 Fault finding after commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE Live maintenance is permitted on intrinsically safe equipment installed in a hazardous area but only certified test equipment should be used unless a gas clearance certificate is available If a ...

Страница 39: ...6 Customer comments BEKA associates is always pleased to receive comments from customers about our products and services All communications are acknowledged and whenever possible suggestions are implemented ...

Страница 40: ...arm silence time Hysteresis may be applied to rate alarms CAUTION Alarm outputs should not be used for critical safety applications such as a shut down system When the BA334G power supply is turned off or disconnected alarm outputs will open irrespective of whether normally open or normally closed outputs have been selected When designing a system an open output should therefore be chosen for the ...

Страница 41: ... tYPE Type of alarm Defines whether the alarm operates on the rate or total display See section 10 3 5 5P1r Alarm setpoint 1 or Adjusts the alarm setpoint The alarm 5P1t is activated when the rate or total display equals the setpoint Note 5P1r is displayed for a rate alarm and 5P1t for a total alarm See section 10 3 6 HI LO Alarm function Defines whether the alarm has a high or low function See se...

Страница 42: ...o return to the Hi Lo prompt in the alarm sub menu 10 3 8 Alarm output status no nC Each single pole alarm output may be open or closed in the non alarm condition When the BA334G power supply is turned off or disconnected the alarm output s will open irrespective of whether normally open or normally closed outputs have been selected Therefore when designing an alarm system normally closed nc shoul...

Страница 43: ...43 ...

Страница 44: ...oints without having access to the configuration and alarm sub menus Protection against unauthorised or accidental adjustment is provided by a separate security access code Using the or push button select AC5P from the configuration menu and press to reach the enable function EnbL Pressing will reveal the existing setting which can be toggled between on and oFF by pressing the or push button When ...

Страница 45: ...or galvanic isolator providing the output parameters do not exceed Uo 28V dc Io 200mA dc Po 0 84W The maximum equivalent capacitance and inductance of the 4 20mA output is Ci 2 2nF Li 4µH To determine the maximum permissible cable parameters these figures should be subtracted from the maximum cable capacitance and inductance specified by the certificate for the Zener barrier or galvanic isolator p...

Страница 46: ... Fig 20 4 20mA output configuration sub menu 10 4 5 Select rate or total source 4 20tYPE The 4 20mA output current can represent the Rate Totaliser s rate or total display this should be defined before any other current output functions are adjusted Using the or push button select 4 20tYPE in the 4 20 op output sub menu and press to reveal the existing setting totAL or rAtE The function can be cha...

Страница 47: ...s required press to enter the value and return to the 20 000 prompt in the 4 20mA output sub menu 4 20 op Notes 1 If the calibration of the rate or total display defined as the source for the 4 20mA output is changed the 4 20mA output will automatically be set to give a constant 3 5mA output irrespective of the display The 4 20mA output should always be reconfigured following reconfiguration of th...

Страница 48: ...t for a short period Be used with dust in subdivisions IIIA combustible flyings IIIB non conductive dust IIIC conductive dust Having a Minimum Ignition Temperature of Dust cloud 120 C Dust layer on Rate 155 C Totaliser up to 5mm thick Dust layer on Rate Refer to Totaliser over 5mm thick EN 60079 14 At an ambient temperature between 40 and 60 C A1 2 Installation and maintenance The installation req...

Страница 49: ...rtification codes Ex ia IIC T5 Ga Ta 40 C to 70 C Ex ia IIIC T80 C IP66 Da Ta 40 C to 60 C The specified IECEx gas and dust intrinsic safety parameters are identical to the ATEX safety parameters described in the main section and Appendix 1 of this manual The IECEx certificate may be downloaded from the BEKA associates or the IECEx website or may be requested from the BEKA sales office A2 2 Instal...

Страница 50: ...ECEx parameters the systems shown in sections 3 and 4 of this manual may therefore also be used for US and Canadian installations subject to compliance with the local codes of practice ETL and cETL intrinsic safety codes USA Canada CL I Div 1 Groups A B C D T5 CL II Div 1 Groups E F G CL III 40ºC Ta 70ºC USA CL I Zone 0 AEx ia IIC T5 Ga Zone 20 AEx ia IIIC T80ºC Da 40ºC Ta 70ºC Canada Ex ia IIC T5...

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Страница 63: ...ield terminals and the two mounting holes are located in a separate compartment with a sealed cover allowing the instrument to be installed without exposing the display assembly The enclosure is fitted with a bonding plate to ensure electrical continuity between the three conduit cable entries A4 4 BA334E Accessories A4 4 1 Units measurement instrument identification The BA334E is fitted with a bl...

Страница 64: ...uired one or both of the IP66 stopping plugs may be replaced with an appropriate IP rated cable gland or conduit fitting d Connect the field wiring to the terminals as shown in Fig A4 2 e Replace the instrument terminal cover and evenly tighten the two A screws If the BA334E is not bolted to an earthed post or structure the earth terminal should be connected to the plant potential equalising condu...

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