Related Manuals for BEKA BA378C
Summary of Contents for BEKA BA378C
- Page 1 BA378C Intrinsically safe panel mounting indicating temperature transmitter issue 6 Issue: 6 25th September 2008...
- Page 2 6.5.2 Low input & display calibration mode 6.5.3 High input & display calibration 12. Backlight 6.6 4/20mA output current calibration The BA378C is CE marked to show compliance with the European Explosive Atmospheres Directive 94/9/EC and the European EMC Directive 2004/108/EC...
- Page 3 You should only enter this section of the programme if you are sure that you want to re-calibrate the internal references. By following the notes in this manual you should be able to set up your BA378C without any problem.
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Page 5: Description
1. DESCRIPTION The transmitter and the optional alarms are powered from the 4/20mA current loop, but the The BA378C is an intrinsically safe 4/20mA loop optional display backlight requires a separate powered transmitter incorporating a large easy to supply. read display. The instrument may be programmed... -
Page 6: Operation
3. INTRINSIC SAFETY CERTIFICATION This allows the BA378C to be installed in all Zones and to be used with most common industrial gases at ambient temperature between -40 and +60 3.1 ATEX certificate Note: minimum operating temperature is -20 The BA378C has been issued with an EC-Type Examination Certificate number BAS02ATEX1185X 3.4 Certification information label... -
Page 7: Electrical System Design For
There are three basic requirements when designing a loop incorporating the BA378C: The intrinsic safety parameters of the Zener barrier must be equal to or less than: Fig 3 BA378C powered from a common supply 280mA 0.85W When designing any loop it is necessary to establish that the sum of the voltage drops caused The voltage between terminals 5 &... -
Page 8: Using Galvanic Isolators
4.2 Using Galvanic Isolators Fig 5 shows the overall dimensions of the BA378C. Recommended panel cut-outs are as detailed Galvanic isolators, although more expensive than below. Zener barriers, do not require a high integrity earth connection. For small systems where a high... -
Page 9: Installation
Up and Down buttons to change the flash- 5.3 EMC ing digit, and the P push-button to move to the next The BA378C complies with the requirements of the digit. If the correct code is entered pressing E will European EMC Directive. For specified immunity cause the first parameter 'InPut' to be displayed. -
Page 12: Summary Of Programme Menu
All new BA378C indicators are supplied calibrated Display Summary of Programme Menu as requested at the time of ordering. If calibration functions is not requested, the transmitter will be set for 3 wire RTD input with 4 to 20mA output correspond- For Thermocouple Inputs ing to a display of 0.0°C to 100.0°C . -
Page 13: Display Units
Display Summary of Programme Menu 6.2 Description of Programme Menu functions functions following sections contains detailed description of each function in the Programme Menu. They should be read in conjunction with the 'In-LO' Low input sub-menu summaries in section 6.1 and the programme Enables the lower voltage input 'InPut' structure shown in Figs 7A and 7B. -
Page 14: Cold Junction Compensation
High resolution only available when 6.4 For resistance thermometer inputs transmitter is displaying temperature in C. When is selected the resolution is always one degree 6.4.1 Types of resistance thermometer 'tYPE' The transmitter may be conditioned to accept To check or change the display resolution select 3-wire, 4-wire or differential Pt100 resistance 'rESn' from the sub-menu and press P to reveal the thermometers. -
Page 15: Low Input & Display Calibration
After selecting voltage input from the 'InPut' menu, The calibration is performed using the internal press P to reveal the 'd.P.' sub-menu. Press P references and may be made with any transmitter input voltage. again to display the current decimal point position. The decimal point can be moved or turned off by Select 'In-HI' from the menu and press P which will pressing the Up or Down push-button, followed by... -
Page 16: Security Code
If the BA378C transmitter is calibrated against an If the security code is lost, access to the external voltage,... -
Page 17: Conditioning Internal References
'Ent' prior to returning to the '4rtd' prompt. This 6.8.2 Voltage input reference 'U.IP' completes adjustment of this reference. With the BA378C input terminals connected to an accurate voltage calibrator, select 'U.IP' from the 'Cond' sub-menu and press P. The transmitter will 6.8.5 Output current reference 'OP'... -
Page 18: Trim Menu
7. TRIM MENU The Trim Menu is the preferred method of routine calibration. It enables the BA378C transmitter to be adjusted using an external voltage, resistance or temperature calibrator. For maximum accuracy the complete loop including the thermocouple or... -
Page 19: Periodic Re-Calibration Using Trim Menu
The transmitter should now be re-calibratied at 8. CALIBRATION EXAMPLE maximum input by selecting the 'SPAn' sub-menu In this example a BA378C is required to display and adjusting the calibrator to simulate maximum with maximum resolution the temperature of a type... - Page 20 'rESn' from the sub-menu and press P. The following steps explain how, using the Trim Pressing the Up or Down button will Menu, the BA378C transmitter may be calibrated toggle between high and low resolution, against an external reference, such as a voltage select 'Hi' and press E to return to the source or temperature calibrator.
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Page 21: Maintenance
If a BA378C fails after it has been functioning correctly the procedure shown in section 9.1 should be followed. -
Page 22: Servicing
10.1 Scale card BA378C transmitter functions are easily program- The BA378C has a window on the right hand side mable on-site, a single spare transmitter of the display to hold a card showing the units of therefore be used to replace any instrument which measurement e.g. -
Page 23: Alarms
Fig 12 Typical application of alarms output is polarised and current will only flow in one direction. 11.1.3 Programming & adjustment When an alarm card is added to a BA378C transmitter the main programme menu is extended as shown in Fig 13. -
Page 24: Summary Of Programmable Functions
11.2 Summary of programmable 11.3 Description of programmable functions functions. The following sections contain detailed descriptions of each programmable function. They should be read in conjunction with the alarm programme Display Summary of function structure shown in Fig 13. 'EnbL' Alarm enable 11.3.1 Alarm enable: EnbL Enables or disables the alarm function... - Page 26 To check or change the alarm output status select 11.3.8 Access Setpoint: AcSP 'no.nc' from the alarm sub-menu and press P to This function controls the parameters in a separate reveal the current setting. The function may be menu which provides direct access to the alarm changed by pressing the Up or Down buttons setpoints when the transmitter is in the display mode i.e.
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Page 27: Backlight
Direct access to the alarm setpoints is only avail- able when the menu is enabled - see section 11.3.8 display mode. Access to the alarm setpoint when the BA378C 12. BACKLIGHT transmitter is in the display mode is obtained by...
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