Issue: 5
18
th
April 2013
BA307E, BA327E,
BA308E & BA328E
intrinsically safe
loop-powered
panel mounting indicators
Issue 5
Page 1: ...Issue 5 18th April 2013 BA307E BA327E BA308E BA328E intrinsically safe loop powered panel mounting indicators Issue 5 ...
Page 2: ...al reference 7 3 Lineariser error message 7 4 Lineariser under and over range 7 5 Lineariser default configuration 8 Maintenance 8 1 Fault finding during commissioning 8 2 Fault finding after commissioning 8 3 Servicing 8 4 Routine maintenance 8 5 Guarantee 8 6 Customer comments 9 Accessories 9 1 Scale card 9 2 Tag strip 9 3 Alarms 9 3 1 Solid state output 9 3 2 Intrinsic safety 9 3 3 Configuratio...
Page 3: ...Ltd and comply with the European ATEX Directive 94 9 EC The EC Type Examination certificate specifies that under fault conditions the output voltage current and power at the 4 20mA input terminals will not exceed those specified for simple apparatus in Clause 5 7 of EN 60079 11 which simplifies installation and documentation For international applications all models have IECEx certification which ...
Page 4: ...Appendixes 1 and 2 3 1 ATEX gas certification All the models have been issued with a common EC Type Examination Certificate number ITS11ATEX27254X by Notified Body Intertek Testing and Certification Ltd 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 Ta 40 to 70ºC...
Page 5: ...e top outer surface of the instrument enclosure It shows the ATEX certification information instrument serial number year of manufacture plus BEKA associates name and location Non European certification information may also be included a typical label is shown below BA307E certification label 4 SYSTEM DESIGN FOR GAS HAZARDOUS AREAS 4 1 Transmitter loops All indicator models may be connected in ser...
Page 6: ... sufficient to drive the indicator plus the interface When a high integrity earth connection is already available a Zener barrier is usually the least expensive option If an earth connection is not available or isolation is required a galvanic isolator is the correct choice If one side of the 4 20mA current loop may be earthed a single channel Zener barrier provides the lowest cost protection If t...
Page 7: ...48mm and the 144 x 72mm instruments together with the recommended panel cut out dimensions To achieve an IP66 seal between the instrument enclosure and the instrument panel the smaller tolerance aperture must be used and the 144 x 72mm models must be secured with four panel mounting clamps Although the indicator front panel provides IP66 protection it should be shielded from direct sunlight and se...
Page 8: ...the instrument is installed Fig 5 Fitting panel mounting clamps 5 4 Scale card The indicator s units of measurement are shown on a printed scale card in a window at the right hand side of the display The scale card is mounted on a flexible strip that is inserted into a slot at the rear of the instrument as shown in Fig 6 Thus the scale card can easily be changed without removing the indicator from...
Page 9: ...000 0000 Function FunC Std Std Display at 4mA Zero 0 0 0 00 Display at 20mA SPAn 100 0 100 00 Resolution rESn 1 digit 1 digit Bargraph start BarLo 0 00 Bargraph finish BarHi 100 00 P button in display mode C P Tare tArE Off Off Default configuration can easily be changed on site 6 1 Summary of configuration functions This section summarises each of the main configuration functions and includes a c...
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Page 11: ...able lineariser To reveal the existing indicator function select FunC from the configuration menu and press P If the function is set as required press E to return to the menu or press the or button to change the setting followed by the E button to return to the configuration menu Std Linear Provides a linear relationship between the 4 20mA indicator input current and the indicator display root Squ...
Page 12: ...se 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 SEt Using the SEt function the indicator can be calibrated without the need for an accurate external current...
Page 13: ... between on and oFF When set as required press E 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 which 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 ne...
Page 14: ...illing the tank with known incremental volumes and calibrating the indicator to display the sum of the increments at each break point The number of break points required should first be entered using the Add and dEL functions In both these sub functions the indicator initially displays the current break points and the total number of break points being used as shown below Display Description of fu...
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Page 16: ... a new break point before the displayed break point The calibration of existing break points is not changed but the identification number of all subsequent break points is increased by one dEL Remove a break point Removes the displayed break point and joins the preceding break point to the following break point with a straight line The identification number of all subsequent break points is decrea...
Page 17: ...uired press E to return to the 0 n prompt from which the the next break point can be selected using the or buttons When the required break point has been selected press P and set the required indicator display at this break point Repeat this procedure until the indicator display at all the break points has been defined and then return to the SEt function in the configuration menu by pressing the E...
Page 18: ...r 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 This can be done without disconnecting power but while the indicator is disconnected the 4 20mA loop will be open circuit 8 3 Servicing All BA307E BA327E BA308E and BA328E loop powered indicators are interchangeab...
Page 19: ...urrent powering the indicator is removed both alarm outputs will open irrespective of configuration The open circuit condition should therefore be chosen as the alarm condition when designing an alarm system Fig 10 illustrates the conditions available and shows which are fail safe When an alarm occurs an alarm annunciator on the indicator front panel is activated and if required the numerical disp...
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Page 21: ... 2 has identical facilities Summary of alarm configuration functions Display Description of function EnbL Alarm enable Enables or disables the alarm without changing the alarm parameters See section 9 3 4 SP1 Alarm setpoint 1 Adjusts the alarm setpoint The alarm is activated when the indicator display equals the setpoint See section 9 3 5 Hi Lo Alarm function Defines the alarm function as High or ...
Page 22: ...for fail safe operation both alarm outputs should be conditioned to be open in the alarm condition nC To check or change the alarm output status select no nC from the alarm configuration menu and press P to reveal the setting The function may be changed by pressing the or button followed by the E button to return to the alarm configuration menu 9 3 8 Hysteresis HStr Hysteresis is shown in the unit...
Page 23: ...aving access to the indicator configuration menu Protection against accidental adjustment of the setpoints when the indicator is in the display mode is provided by a separate security code This direct setpoint access menu is enabled and the separate security code entered from the ACSP function in the alarm configuration menu as shown in Fig 12 To change the menu parameters select ACSP from the con...
Page 24: ... plus the displayed value to be represented or a low and a high setpoint plus the displayed value to be represented by the bargraph as shown in Fig 15 Fig 15 Displayed value and setpoints on bargraph The bargraph area below the low alarm setpoint and the area above the high alarm setpoint are activated The displayed variable is represented by an activated bar which moves between these low and high...
Page 25: ...those specified by clause 5 7 of EN 60079 11 for simple apparatus which simplifies system design and documentation Providing the increased voltage drop can be tolerated the intrinsic safety and system design described in sections 3 and 4 of this manual remain valid with the loop powered backlight 9 4 2 Separately powering the backlight The optional backlight may also be powered from a separate saf...
Page 26: ...onditions for safe use apply see section A1 4 Having a Minimum Ignition Temperature of Dust cloud 120 C Dust layer on indicator 155 C up to 5mm thick Dust layer on indicator Refer to over 5mm thick EN 60079 14 At an ambient temperature between 40 and 70 C A1 3 Maintenance ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE Live maintenance is permitted on intrinsically safe equipment installed in a ha...
Page 27: ...ety parameters and installation requirements for both approvals as defined by IEC EN 60079 14 The ATEX gas and dust installation requirements specified in section 5 and Appendix 1 of this manual may therefore be used for IECEx installations but the local code of practice should also be consulted A2 3 Special conditions for use in IIIC dusts The IECEx certificate for the loop powered indicators has...
Page 28: ...ºC and may be used with the following gases Intrinsic Safety Division 1 or 2 Class I Group A B Group C Group D Zone 0 1 or 2 Class 1 Group IIC Group IIB Group IIA The FM and cFM entity parameters are similar to the ATEX and IECEx parameters and the systems shown in section 4 of this manual may therefore also be used for FM and cFM installations A3 2 Nonincendive approval All the models are FM Clas...
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