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BA327C & BA328C
intrinsically safe
loop-powered
4½ digit panel
mounting indicators

issue 11

Issue: 11

November 2009

Содержание BA327C

Страница 1: ...BA327C BA328C intrinsically safe loop powered 4 digit panel mounting indicators issue 11 Issue 11 3rd November 2009...

Страница 2: ...rator 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...

Страница 3: ...lt conditions the voltage current and power at the input terminals of each instrument will not exceed those specified for simple apparatus in Clause 5 4 of EN50020 1994 The BA327C and BA328C are also...

Страница 4: ...allations in Switzerland This manuals describes installations which conform with EN60079 Part 14 When designing systems for installation outside the UK th local Code of Practice should be consulted 3...

Страница 5: ...s BEKA associates name and location Non European certification information may also be shown 4 SYSTEM DESIGN FOR HAZARDOUS AREAS 4 1 Transmitter loops BA327C and BA328C indicators may be connected in...

Страница 6: ...iers a two channel Zener barrier or a galvanic isolator must be used Again it is necessary to ensure that the voltage capability of the 4 20mA signal is sufficient to drive the indicator plus the volt...

Страница 7: ...erall dimensions of each instrument and the required panel cut out dimensions To achieve an IP65 seal between the instrument enclosure and the instrument panel the smaller tolerance aperture must be u...

Страница 8: ...3 EMC The BA327C and BA328C comply with the requirements of the European EMC Directive 2004 108 EEC For specified immunity all wiring should be in screened twisted pairs with the screens earthed with...

Страница 9: ...ating decimal points for a few seconds while the new information is stored in non volatile memory All new BA327C and BA328C indicators are supplied calibrated as requested at the time of ordering If c...

Страница 10: ...10...

Страница 11: ...lowing table shows the output current from a non linearised differential flowmeter of full flow Current output mA 2 5 4 01 10 0 4 16 25 0 5 00 50 0 8 00 75 0 13 00 100 0 20 00 6 3 Resolution rESn This...

Страница 12: ...orrect pressing P will transfer control to the next digit When the least significant digit has beenadjusted press E to return to the SPAn prompt followed by E to return to the menu 6 7 Conditioning su...

Страница 13: ...calibration and conditioning of the instrument may be protected by a four digit security code which must be entered before access to the programme menu is granted New instruments are programmed with...

Страница 14: ...Down buttons select 50 and then press E twice to return to the main menu Step 5 Define function of P push button Select C P from the main menu and press P to reveal the function of the P button in the...

Страница 15: ...to the main menu Step 4 Define function of P push button Select C P from the main menu and press P to reveal the function of the P button in the display mode Select 4 20 and return to the main menu by...

Страница 16: ...ing correctly the following procedure should be followed Symptom Cause Solution No display No power Check that current 0V between supply is flowing in the loop terminals 1 and 3 Unstable 4 20mA input...

Страница 17: ...ependently programmed as high or low alarms with normally open or normally closed outputs Fig 8 illustrates the conditions available and shows which are fail safe i e in the alarm condition the output...

Страница 18: ...18...

Страница 19: ...mmable alarm functions Display Description of function EnbL Alarm enable Enables or disables the alarm function without changing the alarm parameters See section 9 3 4 SP1 Alarm setpoint 1 Adjusts the...

Страница 20: ...y pressing the Up or Down button followed by the E button to return to the alarm menu 9 3 8 Hysteresis HStr During programming hysteresis is shown in the units the indicator has been calibrated to dis...

Страница 21: ...security code allowing direct access to the setpoints by pressing the P and Up buttons simultaneously New instruments with alarms are supplied with this function disabled and the security code set to...

Страница 22: ...using the Add and dEL functions In both these functions the indicator initially displays the current break point and the total number of break points being used e g 5 13 current total number of break...

Страница 23: ...f break points Each subsequent operation of the P push button will introduce an additional break point When adding a break point to a calibrated indicator the insertion position can be selected using...

Страница 24: ...24...

Страница 25: ...e output which enhances daylight viewing but an additional IS interface and field wiring are required 9 6 1 Separately powered backlight The separately powered backlight is segregated from the measuri...

Страница 26: ...is loop powered This eliminates the need for a separate Zener barrier or galvanic isolator and associated wiring for the backlight thus significantly reducing the installation cost As shown in Fig 16...

Страница 27: ...3 A1 2 4 20mA input in nonincendive circuit The BA327C and BA328C are also Factory Mutual approved as nonincendive for Class I Division 2 locations which allows both indicators to be installed in Div...

Страница 28: ...between the backlight and the measuring circuits should be maintained by following the wiring methods recommended in ANSI NFPA70 article 504 See Fig 15 A1 3 2 2 Loop powered backlight This backlight h...

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Страница 32: ...f Conformity number IECEx ITS 05 0003 which specifies the following certification code and marking Ex ia IIC T5 Ta 40o C to 60 o C The specified intrinsic safety parameters are identical to the ATEX s...

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