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5.3 EMC

The BA338C complies with the requirements of the
European EMC Directive 2004/108/EEC. For
specified immunity all wiring should be in screened
twisted pairs.

To prevent circulating currents, cable screens
should only be earthed at one point in the safe
area.

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Summary of Contents for BA338C

Page 1: ...ry 2011 Certification information label Rate display Annunciators for optional alarms Rotating flow indicator Total display BA338C Intrinsically safe Externally powered pulse input panel mounting rate...

Page 2: ...te interval 6 5 Type of input 6 6 Position of the decimal points 6 7 Lower display 6 8 Rate scale factor 6 9 Timebase 6 10 Rate filter 6 11 Total scale factor 6 12 Clip off 6 13 Local reset 6 14 Reset...

Page 3: ...ost any pulse output flowmeter The total display may be reset to zero by a remote switch contact or from the front panel push buttons Optional accessories enable the flow rate to be transmitted to oth...

Page 4: ...fied Body Intertek Testing Services ITS confirming compliance with the European ATEX Directive 94 9 EC for Group II Category 1 gas atmospheres EEx ia IIC T5 The instrument bears the Community Mark and...

Page 5: ...lvanic isolator connected to terminals 3 and 4 The two system certificates specify maximum permitted cable parameters when 28V 300 devices are used 3 3 2 Contact 2 wire proximity detector or open coll...

Page 6: ...nfirming that it complies with the requirements for Group II Category 1 G EEx ia IIC T5 Tamb 40 to 60o C specified in the ATEX Directive When connected to a suitable system the BA338C may be installed...

Page 7: ...uit that is used for all BA338C installations protected by Zener barriers For simplicity connections for the optional pulse output 4 20mA output and backlight are included in the appendix to this manu...

Page 8: ...tified intrinsically safe voltage source within the hazardous area which can withstand a 500V rms insulation test to earth for one minute and has output parameters equal to or less than Uo 28V dc Io 1...

Page 9: ...is used to transfer the signal to the rate totaliser in the hazardous area Fig 5 Pulse source in safe area 4 3 1 Power supply Any certified galvanic isolator may be used to power the BA338C providing...

Page 10: ...ces should be connected to terminals 3 and 4 These terminals comply with the requirements for simple apparatus They may be directly connected to any certified intrinsically safe voltage source within...

Page 11: ...ent secured with four panel mounting clips The BA338C liquid crystal display has maximum contrast when viewed from directly ahead and slightly below the centre line of the instrument For reflective di...

Page 12: ...ith the requirements of the European EMC Directive 2004 108 EEC For specified immunity all wiring should be in screened twisted pairs To prevent circulating currents cable screens should only be earth...

Page 13: ...decimal points Moving the position of a decimal point in a scale factor will therefore affect the instrument calibration The BA338C updates its total flow calculation twice per second If the instrumen...

Page 14: ...14...

Page 15: ...AY 2 Lower display Turns the loweer display which normally shows rate on or off See section 6 7 Display Description of function SCALE r Rate Scale Factor Defines the arithmetic relationship between th...

Page 16: ...sing Up or Down will scroll through the five options UOLts Voltage pulse input Threshold 1V and 3V 5kHz max Input terminals 3 and 4 COIL Low voltage pulse Threshold 20mV peak 5kHz max Input terminals...

Page 17: ...on the decimal point in the rate scale factor move the flashing digit to the left hand side of the required decimal point position and simultaneously press the Up and Down buttons When the required ra...

Page 18: ...next digit To position the decimal point in the scaling factor move the flashing digit to the left hand side of the required decimal point position and simultaneously press the Up and Down buttons Wh...

Page 19: ...6 15 Security code CodE The 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 inst...

Page 20: ...nput Using the Up or Down button scroll through the main menu until InPut is displayed then press P to reveal the existing setting Select COIL the input for a magnetic pick off using the Up or Down bu...

Page 21: ...c metre so the BA338C is required to display 1 cubic metre for every 1 050 x 1 000 pulses received SCALE t should therefore be set to 1 050 000 Select SCALE t from the main menu and press P which will...

Page 22: ...trument to the CLr Gtot prompt in the main menu Step 12 Define the security code Defining a security code prevents unauthorised access to the programme functions Select COdE from the main menu and pre...

Page 23: ...alarms 8 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 certif...

Page 24: ...status of both alarms If an alarm delay or silence time has been selected the annunciator will flash during the delay or silence period Programmable functions for each alarm include adjustable setpoin...

Page 25: ...ay Description of function EnbL Alarm enable Enables or disables the alarm function without changing the alarm parameters See section 9 3 4 tYPE Type of alarm Defines whether the alarm operates on the...

Page 26: ...or the alarm type has been changed Both alarms must therefore be enabled after calibration changes 9 3 5 Type of alarm tYPE Alarm 1 and Alarm 2 may both be rate or total alarms or one may be conditio...

Page 27: ...resis select HStr from the alarm menu and press P which will reveal the existing figure Each digit can be adjusted using the Up and Down push buttons and the P button to move to the next digit When th...

Page 28: ...l disable the security code allowing direct access to the setpoints in the display mode by pressing the P and Up buttons simultaneously New instruments with alarms are supplied with the security code...

Page 29: ...ght powered by Zener barrier The display brilliance depends upon the current flowing through the backlight This is determined by the supply voltage and the end to end resistance of the Zener barrier o...

Page 30: ...ce and inductance specified by the system certificate of the circuit connected to the BA338C Fig 16 shows how the pulse output circuit may be powered from the BA338C supply to drive a counter in the s...

Page 31: ...the rate display by the d P function The value of the flashing digit may be changed by pressing the Up or Down buttons When this digit is set as required pressing P will transfer control to the next...

Page 32: ...4 Fault finding during commissioning 8 1 after commissioning 8 2 FILtEr 6 10 Flow indicator 2 3 FM Approval Appendix 1 Galvanic isolators 4 3 Gas groups 3 5 Grand total 2 2 clear 6 14 Guarantee 8 5 HI...

Page 33: ...d 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 entity parameters are similar to the ATEX param...

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