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Issue: 4

November 2017

BA304NG & BA324NG

Ex nA & Ex tc

loop-powered

field mounting indicators

Issue 4

Содержание BA304NG

Страница 1: ...Issue 4 1st November 2017 BA304NG BA324NG Ex nA Ex tc loop powered field mounting indicators Issue 4...

Страница 2: ...tor 7 3 Under and over range 7 4 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 G...

Страница 3: ...Notified Body Intertek Testing and Certification Ltd which has been used to confirm compliance with the European ATEX Directive 2014 34 EU For international applications both models have IECEx certifi...

Страница 4: ...and dust certification This section of the instruction manual describes ATEX gas certification ATEX dust certification is described in Appendix 1 and IECEx approvals are described in Appendix 2 3 1 A...

Страница 5: ...to display the measured variable or control signal in engineering units The indicators are transparent to HART signals There are four design requirements 1 The current flowing in the 4 20mA loop must...

Страница 6: ...on the rear of the indicator assembly as shown in Fig 5 If the field wiring is to be terminated prior to the installation of the indicator assembly a back box terminal assembly which includes a 4 20m...

Страница 7: ...ors are supplied with a printed scale card showing the requested units of measurement and tag information If this information is not supplied when the indicator is ordered a blank scale card will be f...

Страница 8: ...r this prompt allowing each digit of the code to be entered using the and push buttons and the button to move control to the next digit When the correct four digit code has been entered pressing will...

Страница 9: ...djusted without the need for an accurate input current or disconnection from the 4 20mA loop See section 6 6 bAr Bargraph format and calibration Only the BA324NG has a bargraph The bargraph may be con...

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Страница 11: ...not required it should be positioned beyond the most or least significant digit When positioned as required press the button to enter the selection and return to the configuration menu 6 5 Calibration...

Страница 12: ...cator s digital display at which the bargraph starts is defined by the bArLo sub function which is selected by pressing the button followed by the button which will reveal the current indicator displa...

Страница 13: ...ions shown in sections 6 0 and 7 3 To reset the indicator or lineariser select r5Et from the configuration menu and press the indicator will display one of the reset options ConF or LtAb ConF Resets t...

Страница 14: ...ows direct calibration of the lineariser with an external current source and is the preferred method when traceability is required If the exact system non linearity is unknown this method also allows...

Страница 15: ...15...

Страница 16: ...ng break point 7 1 1 Example Adding break points to a new indicator When adding break points to a new indicator or to a lineariser following resetting to the factory defaults using the LtAb function d...

Страница 17: ...n by pressing the button The corresponding indicator display at each of the break points can now be defined using the di5P sub function Using the and buttons select the di5P sub function and press whi...

Страница 18: ...o risk of a flammable atmospjher being present If an indicator 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...

Страница 19: ...haracters 5mm high 9 2 Display backlight The BA304NG and BA324NG loop powered indicators can be supplied with a factory fitted backlight that may be loop or separately powered When loop powered the ba...

Страница 20: ...s an emergency shut down system Both models can be supplied with factory fitted dual solid state single pole alarm outputs Each alarm output may be independently conditioned as a high or low alarm wit...

Страница 21: ...lication in which a BA304NG or BA324NG indicator is displaying the output from a 2 wire transmitter in Zone 2 Alarm 1 is switching a solenoid valve in Zone 2 and alarm 2 is switching a sounder located...

Страница 22: ...tpoint 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 Low See section 9 3 6 no nC Normally open or n...

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Страница 24: ...e 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 pr...

Страница 25: ...t having 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 dir...

Страница 26: ...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 18 Fig 18 Displayed value and setpoints on bargraph T...

Страница 27: ...supplied with each panel mounting kit 9 6 Back box terminal assembly If it is necessary to terminate the field wiring prior to the installation of the indicator display a back box terminal assembly is...

Страница 28: ...o be used for Zone 22 combustible dust applications The indicator should be located where the minimum amount of dust will accumulate on the enclosure and the installation should be as specified in thi...

Страница 29: ...USA and Canada A3 0 cETL Mark For installations in the USA and Canada the BA304NG and BA324NG indicators have ETL and cETL Ex nA and Ex tc approval Control Number 4008610 Copies of the Authorisation...