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BA374C

Intrinsically safe

field mounting

indicating temperature

transmitter

Issue: 5

3rd December 2003

Summary of Contents for BA374C

Page 1: ...BA374C Intrinsically safe field mounting indicating temperature transmitter Issue 5 3rd December 2003...

Page 2: ...ut current calibration 6 7 Security code 6 8 Calibrating the internal references 6 8 1 Conditioning internal references 6 8 2 Voltage input reference 6 8 3 3 wire RTD reference 6 8 4 4 wire RTD refere...

Page 3: ...Section 6 you will find information on setting up for Section 6 3 Thermocouple input Section 6 4 Resistance thermometer input Section 6 5 Voltage input A word of warning Section 6 8 explains how you...

Page 4: ...4...

Page 5: ...ing look up tables stored in permanent memory The resulting temperature is shown on the internal display and controls the 4 20mA output current The transmitter and the optional alarms are powered from...

Page 6: ...BA374C to be installed in all Zones and to be used with most common industrial gases at ambient temperatures between 40 60o C Note minimum operating temperature 20o C 3 4 Certification information la...

Page 7: ...Any certified diode return barrier may be used in the return wire For guidance System Certificate Ex96D2505 list some of these devices Fig 3 BA374C powered from a common supply When designing any loo...

Page 8: ...d such that the environmental conditions specified by the instru ment datasheet and the EC Type Examination Certificate are not exceeded Please consult BEKA associates if the instrument is to be insta...

Page 9: ...ogramme menu calibration procedure using the trim menu and the calibration example in sections 6 1 7 1 and 8 are read prior to changing function or calibrating the transmitter Figs 7A 7B and 9 show th...

Page 10: ...ctions in the programme menu is described in the following summary with a cross reference to more detailed information Figs 7A and 7B illustrates the location of each function within the menu Display...

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Page 13: ...will reveal the current setting This setting may be changed by scrolling through the menu using the Up or Down buttons When the required input is displayed pressing P will reveal a sub menu enabling...

Page 14: ...esistance thermometer input from the InPut sub menu press P to reveal the tYPE sub menu Press P again to display the current type of resistance thermometer which may be changed by scrolling through th...

Page 15: ...transfer control to the next digit When the least significant digit has been adjusted press E to return to the InPut prompt from which the display prompt dISP can be selected by pressing the Up or Dow...

Page 16: ...Voltage input 3 wire RTD 4 wire RTD Current output The input voltage reference must be adjusted first irrespective of the transmitter application but it is only necessary to adjust the other three ref...

Page 17: ...ly 4mA The transmitter output current shown on the external current measuring instrument should be adjusted to 4 000 0 001mA using the transmitter Up and Down buttons When correct press the E push but...

Page 18: ...temperature of the primary element operate the Up or Down buttons until the transmitter display is correct Immediately the Up or Down button is operated the annunicator in the top left hand corner of...

Page 19: ...ple With tHC displayed press P to enter the thermocouple sub menu The first parameter tYPE will be displayed pressing P again will give access to the seven different types of thermocouple Select J usi...

Page 20: ...erature although this may be less accurate With the transmitter displaying the ZEro prompt and the correct input connected to the transmitter push P which will cause the transmitter to display the the...

Page 21: ...hazardous area but only certified test equipment should be used unless a gas clearance certificate is available If a BA374C fails after it has been functioning correctly the procedure shown in sectio...

Page 22: ...74C can be supplied with two solid state single pole alarm outputs Each output may be programmed as a high or low alarm with a normally open or a normally closed output Fig 10 illustrates the conditio...

Page 23: ...ary of programmable alarm functions Display Summary of function EnbL Alarm enable Enables or disables the alarm function without changing the alarm parameters See section 11 3 1 SP1 Alarm setpoint 1 A...

Page 24: ...24 Fig 13 Programme structure for optional alarms...

Page 25: ...rm output status select no nc from the alarm sub menu and press P reveal the current setting The function can be changed by pressing the Up or Down button followed by the E button to return the no nc...

Page 26: ...AcSP prompt in the Programme Menu Code 0000 will disable the security code allowing direct access to the setpoints by pressing the P and Up buttons simultaneously New instruments are supplied with thi...

Page 27: ...or galvanic isolator may be used providing the output parameters do not exceed Uo 30V dc Io 159mA Po 0 8W For guidance the system certificates list some of the devices which may be used Fig 15 Backli...

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