BEKA BA368E Manual Download Page 1

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Issue: 5

9th July 2019

BA368E

Two Input

Intrinsically safe

Counter

Issue 5

Summary of Contents for BA368E

Page 1: ...Issue 5 9th July 2019 BA368E Two Input Intrinsically safe Counter Issue 5 ...

Page 2: ...n and Calibration 6 1 Calibration structure 6 2 Accessing configuration functions 6 3 Summary of configuration functions 6 4 Input A 6 5 Input A type 6 6 Input A debounce 6 7 Input b 6 8 Input b type 6 9 Input b debounce 6 10 Input A pulse counting edge 6 11 Input b pulse counting edge 6 12 Display update interval 6 13 Counting function 6 14 Upper display 6 15 Lower display 6 16 Position of decima...

Page 3: ... 3 7 Alarm function 10 3 8 Alarm output status 10 3 9 Hysteresis 10 3 10 Alarm delay 10 3 11 Alarm silence time 10 3 12 Flash display when alarm occurs 10 3 13 Access setpoint 10 3 14 Adjusting alarm setpoints from display mode 10 4 Display backlight 10 5 4 20mA output 10 5 1 Intrinsic safety 10 5 2 System design 10 5 3 Configuration and calibration 10 5 4 Access 4 20mA output sub menu 10 5 5 Enab...

Page 4: ...cation which is described in Appendix 1 For applications in the USA and Canada the BA368E has ETL and cETL certification which is described in Appendix 2 2 OPERATION Fig 1 shows a simplified block diagram of the BA368E Counter The instrument has two inputs A and b which can be configured to accept pulses from most types of sensor and display the total number of pulses received and their combined r...

Page 5: ...ter may be configured to provide direct access to the alarm setpoints from the display mode when the and buttons are operated simultaneously See 10 3 13 and 10 3 14 2 3 Displays The BA368E Counter has two digital displays and associated annunciators plus a pulse input indicator as shown on the front cover of this manual Total Shows the total pulse count on the display upper eight digit display May...

Page 6: ...ene Group C hydrogen Having a temperature classification of T1 450 C T2 300 C T3 200 C T4 135 C T5 100 C At ambient temperatures between 40 and 70 C The specified operating temperature of the BA368E Counter is 40 to 70 C At temperatures below 20 C the instrument will continue to count but the display digits will change increasingly slowly and the contrast will be reduced This allows the BA368E Cou...

Page 7: ...ple apparatus This allows the output parameters of the pulse input to be ignored when assessing the safety of the sensor connected to a Counter This allows almost any certified intrinsically safe voltage pulse or certified magnetic pick off to be directly connected to one of the BA368E Counter inputs The BA368E EC Type Examination Certificate specifies that the equivalent capacitance and inductanc...

Page 8: ...e area a Zener barrier or intrinsically safe relay is required to transfer the contact closure into the hazardous area Almost any intrinsically safe relay with certification permitting the contacts to be connected to equipment in the hazardous area may be used A positive polarity Zener barrier may also be used as shown in Fig 2 Alternatively the BA368E Counter may be configured so that the total d...

Page 9: ...BA368E used with Zener barriers Alternatively the pulse source may be located in the safe area Fig 3 shows how an additional Zener barrier is used to transfer the signal to the Counter in the hazardous area When more than one Zener barrier is used in a system all must have the same polarity i e all positive or all negative barriers When designing a system it is important to remember that terminals...

Page 10: ... 1 5 Open collector input Most open collector sensors located in the same hazardous area as the BA368E Counter may be directly connected to pulse input terminals 5 6 and 9 10 providing the sensor and associated wiring can withstand a 500V rms insulation test to earth The open collector device must comply with the requirements for simple apparatus or have input safety parameters equal to or greater...

Page 11: ...BA368E can be configured to reset the total display to zero when the and push buttons are operated simultaneously for more than three seconds see 6 24 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 certified galvanic isolator with output parameter...

Page 12: ...se above the upper threshold Input sensor Switching thresholds Lower Upper Switch 100 1000 Proximity detector 1 2mA 2 1mA Open collector 2k 10k Magnetic pick off 0mV 40mV peak Voltage pulse low 1 0V 3 0V Voltage pulse high 3 0V 10 0V 4 2 3 Switch contact input Any mechanically activated switch contact located in the same hazardous area as the BA368E Counter may be directly connected to pulse input...

Page 13: ...her of the voltage pulse ranges the pulse input terminals 5 6 and 9 10 of the BA368E Counter comply with the requirements of simple apparatus allowing connection to any intrinsically safe voltage source within the hazardous area having output parameters equal to or less than Uo 28V dc Io 200mA dc Po 0 84W The maximum permitted cable parameters will be defined by the voltage source intrinsic safety...

Page 14: ... will be reduced Figs 6 shows the overall dimensions together with the recommended panel cut out dimensions To achieve an IP66 seal between the instrument enclosure and the instrument panel the smaller cut out dimensions should be used and the instrument should be secured with four panel mounting clamps 5 2 EMC The BA368E Counter complies with the requirements of the European EMC Directive 2014 30...

Page 15: ... panel wiring is supported Fig 7 Fitting panel mounting clamps 5 4 Scale card The Counter s units of measurement may be 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 8 Thus the scale card can easily be changed without removing the Counter from t...

Page 16: ...alue clr val 00000000 Local clear loc clr Local total reset Clr tot oFF Local grand total reset Clr Gtot oFF Security code CodE 0000 Note While the instrument is being configured counting continues so that any input pulses occurring during this time are recorded 6 1 Calibration structure Fig 9 shows the calibration structure of the BA368E Counter The two pulse inputs are processed by the count fun...

Page 17: ...ory If after accessing the configuration menu the interval between operating any front panel push button exceeds one minute the BA368E will automatically return to the display mode and any configuration changes will not be stored in permanent memory When making changes to multiple configuration functions it is therefore sensible to occasionally return to the display mode to save the changes that h...

Page 18: ...n di5P 2 Lower display Turns the lower display which normally shows rate on or oFF See section 6 15 dP Position of decimal points Defines the position of the decimal point in both the total and rate displays See section 6 16 5CALE t Total Scale Factor 5CALE t is a dividing factor that converts the pulse output from arithmetic Count function into the required total display in engineering units 5CAL...

Page 19: ...e section 6 23 Clr tot When on is selected total display is reset when and buttons are operated simultaneously for more than 3 seconds in the display mode See section 6 24 Clr Gtot When on is selected the grand total may be reset when and buttons are operated simultaneously for more than 10 seconds in the display mode see section 2 2 for details Note Once reset the grand total can not be restored ...

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Page 22: ...uch as those resulting from a mechanical contact closing and bouncing The debounce function only applies to the input in which the function is located Three levels of protection may be independently selected for each input The amount of debounce applied depends upon the type of Counter input that has been selected for the input in the associated inP tYPE function Select inPut A or inPut b in the c...

Page 23: ...unt occurs to be selected It applies to input A for all counting modes except quadrature A rEL b To check or change the input A pulse edge on which the count occurs select CntEdG A from the configuration menu and press which will reveal EdGE 1 or EdGE 2 If required press the or button to change the setting followed by the button to return to the configuration menu EdGE 1 Type of input Counting edg...

Page 24: ...c relationship between Inputs A and Input b The following four modes may be selected Display Input count mode A b Pulses at input A added to pulses at input b A b Pulses at input b subtracted from pulses at input A A Con b Input b controls count direction of input A Input b Input A Low Up counter High Down counter A rEL b Quadrature input with sensors electrically 90o apart The pulse output is not...

Page 25: ...ional Alarm outputs Optional 4 20mA output 6 17 Total scale factor 5CALE t 5CALE t is a dividing factor adjustable between 0 0001 and 99999 that enables the total to be displayed in engineering units e g if one pulse from the arithmetic count function represents 1 centimetre of dispensed cable and the total display is required in metres 5CALE t should be set to 100 0 which is the number of centime...

Page 26: ...defines the amount of filtering applied to the display as shown below First digit Filter time constant Seconds 0X 0 1X 1 3 2X 4 3 3X 6 5 4X 8 7 5X 11 3 6X 15 7 7X 20 9 8X 25 2 9X 31 5 The second digit defines the deviation from the displayed rate at which the filter will be overridden and the rate display will move rapidly to the new value Second digit Magnitude of step change which will produce a...

Page 27: ...sh buttons simultaneously for more than three seconds To check or change the setting select LoC CLr in the configuration menu and press which will reveal the Clr tot prompt operating again will show if the local total reset is on or oFF If set as required operate the button twice to return to the configuration menu or the or button to change the setting followed by the button twice to enter the ch...

Page 28: ... is lost 6 28 Reset configuration to factory defaults r5Et dEF This function returns the BA368E Counter to the factory defaults shown in section 6 0 To prevent accidental use the request must be confirmed by entering 5urE before the configuration change will be executed Select r5Et dEF from the configuration menu and press the instrument will display 0000 with the first digit flashing To confirm t...

Page 29: ...g the output parameters do not exceed Uo 28V dc Io 200mA Po 0 84W The equivalent capacitance and inductance of the pulse output are both zero which allows the maximum permissible cable parameters specified by the certificate for the Zener barrier or galvanic isolator powering the pulse output circuit to be used 7 2 System design The BA368E Counter pulse output is a passive circuit i e not powered ...

Page 30: ...figured such that the output pulse frequency with the specified pulse width can not be output in real time the number of pulses will be stored and transmitted at the maximum possible speed When the total display is reset to zero or the power supply to the BA368E Counter is disconnected or turned off any stored pulses will not be retained 7 4 Access Pulse output sub menu PuL5E oP Using the or push ...

Page 31: ...0 1000 10000 Using the or push button select diVidE in the pulse output sub menu and press to reveal the existing divisor The value can be changed by pressing the or push button to select the required value followed by the button to return to diVidE prompt Note This function only appears in the sub menu when the output pulse is derived from the total display 7 8 Output pulse width durAtion When th...

Page 32: ... for a 2 wire proximity detector and then return to the inPut A prompt in the configuration menu by pressing Repeat for the second input inPut b Step 3 Select input count mode The two proximity detectors are positioned so their outputs are electrically 90 apart From this information in the quadrature input mode the BA368E Counter can sense the direction and angular movement of the wheel to which t...

Page 33: ...button scroll through the three options and select tb 1 Return to the t bA5E prompt in the configuration menu by pressing Step 10 Adjust the rate display filter The rate display filter parameters should be adjusted experimentally after installation to provide a stable rate display with an acceptable step response During commissioning it is recommended that initially the second digit of the rate pa...

Page 34: ...ly the same way before returning to the configuration menu by pressing the button twice Step 13 Define the security code Defining an access security code prevents unauthorised access to the configuration menu Select CodE in the configuration menu and press which will reveal the existing security code with the first digit flashing Using the and buttons enter the new code 1209 digit by digit The but...

Page 35: ...arms 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 BA368E Counter fails a...

Page 36: ...rned 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 alarm condition Alarm annunciators on the instrument display indicate the status of each alarm If an alarm delay or silence time has been selected the annunciator will flash during the delay or...

Page 37: ...ction 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 5P1t alarm 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 fun...

Page 38: ...arm sub menu 10 3 5 Type of alarm tYPE Alarm 1 and Alarm 2 are totally independent both may be rate or total alarms or one may be conditioned for rate and the other for total Using the or push button select tYPE from the selected alarm sub menu and press to check or change the function The or push button will toggle the selection between rAtE and totAL when set as required press the button to retu...

Page 39: ...ich will reveal the existing hysteresis with one digit flashing The required hysteresis can be entered using the or push button to adjust the flashing digit and the button to transfer control to the next digit When set as required press to enter the value and return to the H5tr prompt in the alarm sub menu e g A BA368E Counter configured to display a rate of 0 to 5000 with a high alarm set at 4000...

Page 40: ...d from the sub menu and press which will cause the BA368E Counter to display 0000 with one digit flashing The flashing digit may be adjusted using the or push button 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 ACCd prompt The revised security code will be activated when the BA368E Counter is returne...

Page 41: ... or total display 10 5 1 Intrinsic safety The 4 20mA output has been certified as a separate galvanically isolated intrinsically safe circuit complying with the requirements for simple apparatus This allows terminals C1 and C3 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 200m...

Page 42: ...ive of the instrument display 10 5 6 Select rate or total source 4 20tYPE The 4 20mA output current can represent the BA368E Counter s rate or total display and this must be defined before any other 4 20mA current output functions are configured Using the or push button select 4 20tYPE in the 4 20mA output sub menu and press to reveal the existing setting totAL or rAtE The function can be changed ...

Page 43: ... required display can be entered using the or push button to adjust the flashing digit and the button to transfer control to the next digit When set as required press to enter the value and return to the 20 000 prompt in the 4 20mA output sub menu Note If the BA368E Counter and the 4 20mA current sink output are powered from separate supplies the 4 20mA output current will continue to flow when th...

Page 44: ...o the ATEX safety parameters described in the main section of this manual and both refer to the same standards Therefore the ATEX installation requirements specified in section 5 of this manual may be used for IECEx installations but the local code of practice should also be consulted A1 3 Special conditions for safe use The IECEx Certificate of Conformity number has an X suffix indicating that sp...

Page 45: ...arameters 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 CL I Div 1 Groups A B C D T5 US IS gas Div cert CL II Div 1 Groups E F G CL III US IS dust Div cert CL I Zone 0 AEx ia IIC T5 Ga US IS gas Zone cert Ex ia IIC T5 Ga Canadian IS gas Zone...

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