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14

The indicator’s digital display at which the
bargraph starts is defined by the

bArLo

sub-

function which is selected by pressing the

*

button followed by the

(

button which will reveal

the existing indicator display at which the bargraph
starts.

The flashing digit can be adjusted by

pressing the

&

or

*

buttons, when set as

required pressing

(

will transfer control to the

next digit. When all the digits have been adjusted,
press

)

to return to the

bArLo

prompt from which

bArHi

which defines the finishing point of the

bargraph can be selected by pressing the

*

button.

bArHi

is adjusted in the same way as

bArLo

. When set as required, pressing

)

twice

will return the display to the

bAr

prompt in the

configuration menu.

Note:

bArLo

must be set lower than

bArHi

,

incorrect setting is indicated by the
bargraph scale flashing with a single
bargraph segment activated.

6.8

Function of the 

(

 push button:  

C--P

When the indicator is in the display mode,
operating the

(

push button will display the input

current in milliamps, or the displayed value as a
percentage

of

the

difference

between

the

displayed values at 4mA and 20mA inputs.

To check or change the function of the

(

push

button select

C--P

from the configuration menu

and press

(

to reveal the existing setting.

Pressing the

&

or

*

button will toggle the setting

between

4-20

the current display in milliamps and

PC

the percentage display. When set as required

press

)

to return to the

C--P

prompt in the

configuration menu.

6.9

Tare function:  

tArE

The tare function is primarily intended for use with
a weighing system. When the indicator is in the
display mode and the tare function is activated,
pressing the

)

button for more than three

seconds will zero the indicator’s digital display and
activate the tare annunciator.

The BA324SG

bargraph remains linked to the digital display when
the tare function is activated.

Subsequent

operation of the

)

push button for less than 3

seconds will return the indicator to the gross
display and deactivate the tare annunciator.

To check or change the tare function select

tARE

from the configuration menu and press

(

to

reveal the existing setting. Pressing the

&

or

*

button will toggle the setting between

on

and

oFF

.

When set as required press

)

to return to the

tARE

 prompt in the configuration menu.

6.10

Security code:  

CodE

Access to the instrument configuration menu may
be protected by a four digit security code that must
be entered to gain access.

New instruments are

configured with the default security code

0000

which

allows

unrestricted

access

to

all

configuration functions.

To enter a new security code select

CodE

from the

configuration menu and press

(

which will cause

the indicator to display the existing security code
with one digit flashing. The flashing digit can be
adjusted using the

&

or

*

push buttons, when

set as required operating the

(

button will

transfer control to the next digit.

When all the

digits have been adjusted press

)

to return to the

CodE

prompt in the configuration menu. The

revised security code will be activated when the
indicator is returned to the display mode. Please
contact BEKA associates sales department if the
security code is lost.

6.11

Reset to factory defaults:  

r5Et

This function enables the indicator and the
lineariser to be quickly returned to the factory
default configurations shown in section 6.0.

To reset the indicator or lineariser select

r5Et

from

the configuration menu and press

(

, the indicator

will display one of the reset options 

ConF

 or 

LtAb

.

ConF

Resets the indicator to defaults

LtAb

Resets the lineariser to defaults

Using the

&

or

*

push button select the

required sub-function and press

(

. To prevent

accidental resetting the request must be confirmed
by entering

5urE

. Using the

*

button set the first

flashing digit to

5

and press

(

to transfer control

to the second digit which should be set to

u

.

When

5urE

has been entered pressing the

)

button will reset the selected configuration menus
and return the display to the

r5Et

function in the

configuration menu.

6.12

Under and over-range

If the numerical display range of the indicator is
exceeded, all the decimal points will flash as
shown below:

 BA304SG

 BA324SG

         Underrange

-9

 

.

 

9

 

.

 

9

 

.

 

9

-9

 

.

 

9

 

.

 

9

 

.

 

9

 

.

 

9

Overrange

9

 

.

 

9

 

.

 

9

 

.

 

9

9

 

.

 

9

 

.

 

9

 

.

 

9

 

.

 

9

Although not guaranteed, most indicators will
continue to function normally with an input current
between 1.8mA and 4mA, at lower currents the
instrument will display

LPLo

before it stops

functioning.

Under or over-range of the BA324SG bargraph is
indicated by a flashing arrow at the appropriate
end of the bargraph.

Содержание BA304SG

Страница 1: ...Issue 2 30th September 2020 BA304SG BA324SG Increased safety Ex eb and dust ignition protection by enclosure Ex tb loop powered field mounting indicators Issue 2 ...

Страница 2: ... format and calibration bAr 6 8 Function of the push button C P 6 9 Tare function tArE 6 10 Security code CodE 6 11 Reset to factory defaults r5Et 6 12 Under and over range 7 Lineariser 7 1 Lineariser calibration using an external current source 7 1 1 Example Adding break points to a new indicator 7 2 Lineariser calibration using internal reference 7 2 1 Example Adding break points to a new indica...

Страница 3: ...y backlight is available as an option Model Display BA304SG 4 digits 34mm high BA324SG 5 digits 29mm high and 31 segment bargraph This instruction manual supplements the instruction sheet supplied with each instrument The main application of both models is to display a measured variable or control signal in a gas or dust hazardous process area The zero and span of the display are independently adj...

Страница 4: ...cation Increased safety Ex eb is a type of electrical equipment protection which provides increased security against the possibility of excessive temperatures and against the occurrence of arcs and sparks The requirements are defined by international standard IEC 60079 7 which is published in the UK as BS EN 60079 7 To allow the BA304SG and BA324SG to be installed in Zone 1 both indicators incorpo...

Страница 5: ...rom a SELV separated or safety extra low voltage or PELV protected extra low voltage supply or from an adequately approved supply providing double or reinforced insulation as specified in IEC 60079 14 This requirement also applies to flameproof equipment and does not usually cause any difficulties because the power supply is required to be safe for personnel contact In European terms compliance wi...

Страница 6: ...y with the requirements of IEC 60079 14 Electrical installations design selection and erection Figs 2 illustrates a typical application in which an indicator is connected in series with a 2 wire flameproof Ex d transmitter Alternatively an increased safety Ex e pressurised Ex p or in Zone 2 a Type n Ex nA transmitter could be used Fig 2 Typical application showing indicator displaying transmitter ...

Страница 7: ... intrinsic safety should be mechanically robust having a toughened outer sheath or armour Wiring should have adequate voltage and current rating and should comply with the requirements of IEC60079 14 Section 9 Cables and Wiring Systems Cables should be suitable for the anticipated operating temperature protected from voltage overloads and have a clearly defined means of isolation No additional cab...

Страница 8: ...8 Fig 6 Installation procedure Fig 7 Dimensions of BA304SG and BA324SG Fig 8 Terminal connections ...

Страница 9: ...lied when the indicator 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 an indicator carefully pull the transparent tab at the rear of the indicator assembly away from the indicator as shown in Fig 9a Fig 9a Removing s...

Страница 10: ...efault Configuration BA304SG BA324SG Access code CodE 0000 0000 Function FunC Linear Linear Display at 4mA 2ero 0 0 0 00 Display at 20mA 5PAn 100 0 100 00 Resolution rE5n 1 digit 1 digit Bargraph start BarLo 0 00 Bargraph finish BarHi 100 00 button in display mode C P Tare tArE Off Off 6 1 Summary of configuration functions This section summarises each of the main configuration functions and inclu...

Страница 11: ...11 ...

Страница 12: ...ion Lin 16 segment adjustable lineariser To reveal the indicator s existing function select FunC from the configuration menu and press If the function is set as required press to return to the menu or press the or button to change the setting followed by the button to return to the configuration menu 5td Linear Provides a linear relationship between the 4 20mA indicator input current and the indic...

Страница 13: ...ing the difference between the two currents is greater than 4mA If these conditions are not complied with the indicator displays FaiL and aborts the calibration c If the zero current is greater than the span current the instrument will be reverse acting i e an increasing input current will cause the display to decrease 6 6 Calibration using internal reference 5Et Using the 5Et function the indicat...

Страница 14: ...etting between on and oFF When set as required press to return to the tARE prompt in the configuration menu 6 10 Security code CodE Access to the instrument configuration menu may be protected by a four digit security code that must be entered to gain access New instruments are configured with the default security code 0000 which allows unrestricted access to all configuration functions To enter a...

Страница 15: ...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 e g the output from a level sensor in an irregular tank may be displayed in linear volumetric units by filling the tank with known incremental v...

Страница 16: ...16 ...

Страница 17: ...ing break point 7 1 1 Example Adding break points to a new indicator When adding break points to a new indicator or to a lineariser following resetting to the factory defaults using the r5et function described in section 6 11 each additional break point should be added before the highest existing breakpoint The first additional break point should be added before the default break point 1 1 which w...

Страница 18: ...ction by pressing the button The corresponding indicator display at each of the break points can now be defined using the di5P sub function Using the and buttons select the di5P sub function and press which will reveal the starting point for the first break point 0 n where n is the total number of break points entered Press and use the and buttons and the button to move between digits to enter the...

Страница 19: ... eb and Ex tb certified indicators The instrument enclosure should only be opened when the indicator is de energised or a gas dust clearance certificate has been issued If an indicator fails after it has been functioning correctly follow the procedure shown in section 8 1 If this does not reveal the cause of the fault it is recommended that the instrument is replaced 8 3 Servicing BA304SG and BA32...

Страница 20: ...394G panel mounting kit which consists of two 316 stainless steel brackets will secure an indicator into a panel aperture The kit does not seal the joint between the panel and the instrument and is intended for mounting an indicator onto an open panel APPENDIX 1 Dust Certification A1 0 Ex tb dust certification In addition to IECEx and ATEX certification permitting installation in explosive gas atm...

Страница 21: ...m foreign bodies It is good practice to prevent dust accumulating on the indicator enclosure If this can not be avoided care should be taken to ensure that the layer thickness does not exceed 5mm for dusts having a minimum ignition temperature of 155 C A1 3 Cable glands and conduit fittings Both back box cable entries have M20 x 1 5 threads The right hand entry is fitted with an Ex e and Ex t cert...

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