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Issue: 1

February 2017

BA314G and BA314E

Intrinsically safe

Tachometers

Issue 1

Содержание BA314E

Страница 1: ...Issue 1 7th February 2017 BA314G and BA314E Intrinsically safe Tachometers Issue 1...

Страница 2: ...ns 6 3 Summary of configuration functions 6 4 Input inPut 6 5 Input type inP tYPE 6 6 Debounce dEbouncE 6 7 Display update interval uPdAtE 6 8 Run time display di5P 2 6 9 Position of the decimal point...

Страница 3: ...time 5IL 9 3 12 Flash display when alarm occurs FL5H 9 3 13 Access Setpoint AC5P 9 3 14 Adjusting alarm setpoints from the display mode 9 4 4 20mA output 9 4 1 Intrinsic safety 9 4 2 System design 9...

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Страница 5: ...A314E only has ATEX gas certification The main sections of this manual describe ATEX gas certification For international applications the BA314G and BA314E also have IECEx certification which is descr...

Страница 6: ...fitted A Dual alarm outputs P Pulse output Fitted to all BA314G C 4 20mA output Access to configuration menu Note When optional alarms are fitted the Tachometer may be configured to provide direct acc...

Страница 7: ...rt time Be used with gases in groups Group A propane Group B ethylene Group C hydrogen In gases that may be used with equipment having a temperature classification of T1 450 C T2 300 C T3 200 C T4 135...

Страница 8: ...Po 0 84W or complies with requirements for simple apparatus b The Sensor and associated wiring can withstand a 500V rms insulation test to earth c The Sensor is located in the same hazardous area as t...

Страница 9: ...enclosure It shows the ATEX IECEx and ETL certification information plus BEKA associates name location year of manufacture and the instrument serial number Other certification information may also be...

Страница 10: ...barrier the supply voltage in the safe area must be between 15 5V and the maximum working voltage of the Zener barrier which depending upon manufacturer will be approximately 26V Note The optional fac...

Страница 11: ...4 1 6 Magnetic pick off input Sensors incorporating a magnetic pick off to sense movement will have a low level voltage output unless the sensor incorporates an amplifier CoiL in the BA314G input conf...

Страница 12: ...usly for more than two seconds in the totalising mode i e when the instrument is displaying flow See section 6 15 4 2 Use with Galvanic Isolators Galvanic isolators are probably the simplest intrinsic...

Страница 13: ...ector 2k 10k Voltage pulse low 1 0V 3 0V Voltage pulse high 3 0V 10 0V Magnetic pick off 0mV 40mV peak Proximity detector 1 2mA 2 1mA Switch 100 1000 Switch contacts proximity detectors and open colle...

Страница 14: ...ge pulse input ranges are independently selectable in the BA314G Tachometer configuration menu VoLt5 L and VoLt5 H When configured for either of the voltage pulse ranges and terminals 3 4 are not link...

Страница 15: ...tor An insulated M4 stud is provided in the bottom right hand corner the back box for interconnecting cable screens The BA314G Tachometer may be pipe mounted using a BA393G pipe mounting kit or panel...

Страница 16: ...instrument 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...

Страница 17: ...tor that determines whether the Tachometer displays speed per second per minute or per hour The Tachometer incorporates a run time counter that displays the time in hours that the speed of the monitor...

Страница 18: ...on or oFF See section 6 8 Display Summary of function dP Decimal points Defines the position of the decimal point in the Tachometer speed display See section 6 9 5CALE 5 Speed scale factor 5CALE 5 is...

Страница 19: ...6 Display Summary of function CLr Gtot Resets grand total run time to zero This function resets the grand total run time to zero from within the configuration menu when CLr YE5 is selected and 5urE is...

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Страница 22: ...Tachometer miscounting when the input pulse has noisy edges such as those resulting from a mechanical contact closing and bouncing Three levels of protection may be selected and the amount of debounc...

Страница 23: ...g shaft generates 18 pulses per revolution to produce a Tachometer speed display in revolutions 5CALE 5 should be set to 18 0 The units of the Tachometer speed display are pulses per unit of time The...

Страница 24: ...d it is not necessary to enter a clip off value see 6 8 To check or change the clip off threshold select CLP oFF from the configuration menu and press which will reveal the current setting The thresho...

Страница 25: ...isplayed and then press which will result in a 0000 prompt being displayed with the first digit flashing This is a request for the instruction to be confirmed by entering 5urE using the or button to a...

Страница 26: ...g 11 shows how a 2 channel Zener barrier may be used to produce a voltage pulse in the safe area that could be used to drive a safe area tachometer The positive terminal of the pulse output circuit P1...

Страница 27: ...e output pulse with defined duration by the diVidE and durAtion functions Using the or push button select 5ourCE in the pulse output sub menu and press to reveal the existing pulse source The source c...

Страница 28: ...ng the or push button to select the required value followed by the button to return to durAtion prompt Note This function only appears in the pulse output sub menu when 5CALEd is selected in the 5ourC...

Страница 29: ...between display updates Using the or button select uPdAtE in the configuration menu and press to reveal how frequently the Tachometer display is updated Using the or push button select 0 5 0 5 second...

Страница 30: ...h buttons The button will transfer control to the second digit which controls the step response and should be set to 0 in the same way Finally enter the selection and return to the FiLtEr prompt in th...

Страница 31: ...ts unauthorised access to the configuration menu Using the or button select CodE from the configuration menu and press which will reveal 0000 with the first digit flashing This example requires the se...

Страница 32: ...tion change Re enable both alarms See 9 3 4 8 2 Fault finding after commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE Live maintenance is permitted on intrinsically safe equipment installe...

Страница 33: ...an be supplied with factory fitted dual isolated solid state single pole alarm outputs that may be independently configured Each may be configured as a speed or run time alarm with a high or low funct...

Страница 34: ...r barrier or galvanic isolator providing the output parameters of the circuit do not exceed Uo 28V dc Io 200mA Po 0 84W The maximum equivalent capacitance and inductance between each set of alarm term...

Страница 35: ...nt Note 5P15 is displayed for a speed alarm and 5P1H for a run time alarm See section 9 3 6 HI LO Alarm function Defines whether the alarm has a high or low function See section 9 3 7 Display Summary...

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Страница 37: ...turn to the Hi Lo prompt in the alarm sub menu 9 3 8 Alarm output status no nC Each single pole alarm output may be open or closed in the non alarm condition When the BA314G or BA318E power supply is...

Страница 38: ...ts without having access to the configuration and alarm sub menus Protection against unauthorised or accidental adjustment is provided by a separate security access code Using the or push button selec...

Страница 39: ...the or push button and the button to transfer control to the next digit When the required setpoint has been entered pressing will return the display to the 5P1x or 5P2x prompt from which the other se...

Страница 40: ...e not powered but it is totally isolated from all other Tachometer circuits It is effectively a 2 wire 4 20mA transmitter requiring a minimum supply of 5V with its current being controlled by the Tac...

Страница 41: ...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 4 000 prompt in the 4 20mA output sub menu 9 4 7 Display...

Страница 42: ...ersist for a short period Be used with dust in subdivisions IIIA combustible flyings IIIB non conductive dust IIIC conductive dust Having a Minimum Ignition Temperature of Dust cloud 120 C Dust layer...

Страница 43: ...tification codes Ex ia IIC T5 Ga Ta 40 C to 70 C Ex ia IIIC T80 C IP66 Da Ta 40 C to 60 C The specified IECEx gas and dust intrinsic safety parameters are identical to the ATEX safety parameters descr...

Страница 44: ...parameters 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 intrin...

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Страница 57: ...he two mounting holes are located in a separate compartment with a sealed cover allowing the instrument to be installed without exposing the display assembly The enclosure is fitted with a bonding pla...

Страница 58: ...d one or both of the IP66 stopping plugs may be replaced with an appropriate IP rated cable gland or conduit fitting d Connect the field wiring to the terminals as shown in Fig A4 2 7 Replace the inst...

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