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BEKA Advisor A90-SS, Manual

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BEKA Advisor A90-SS Manual Download Page 20

7.  ACCESSORIES

7.1  Scale card

The A90-SS panel meter has a window on the right
hand side of the display through which to view a
scale card showing the units of measurement such
as 

o

C, mbar or rpm.   New meters are fitted with a

scale  card  showing  the  units  of  measurement
specified when the meter was ordered, if the units
are not specified a blank scale card will be fitted.   

A  pack  of  scale  cards  pre-printed  with  common
units of measurement is available as an accessory.
These  can  easily  be  fitted  to  the  A90-SS  meter
without  opening  the  instrument  enclosure  or
removing it from the panel,  See section 4.4 of this
instruction manual.   

Custom scale cards for applications requiring less
common units of measurement are also available.  

7.2  Tag information

New meters can be supplied with tag or application
information printed onto the rear panel adjacent to
the terminals,  This tag information is not visible
from the front of the instrument after installation.

7.3  Alarms

CAUTION

These alarm outputs should not be used for
critical  safety  applications  such  as  an
emergency shut down system.

The  A90-SS  panel  meter  can  be  supplied  with
factory fitted dual alarms each having a single pole
changeover relay contact output.   Each alarm may
be  independently  conditioned  as  a  high  or  low
alarm.  

When  the  A90-SS  panel  meter  power  supply  is
removed both alarm outputs will be de-energised.
This  condition  should  be  chosen  as  the  alarm
condition when designing an alarm system.    

When  an  alarm  occurs  an  alarm  annunciator  on
the A90-SS front panel is activated and if required
the  numerical  display  can  alternate  between  the
measured  value  and  the  alarm  channel
identification 

ALr1

 or 

ALr2

.

CAUTION

The  alarms  are  activated  by  the  meter’s
numerical display.  Use of the Tare Function

tArE

  will  change  the  numerical  display,  the

alarms will continue to function at the original
displayed value, but this will correspond to a
different input.

Configurable  functions  for  each  alarm  include
adjustable  setpoint,  hysteresis,  alarm  delay  and
alarm accept.

7.3.1  Alarm relay contacts 

Each alarm has a single pole change over relay
output which as shown in Fig 10.

Fig 10  Alarm contact outputs

The contact rating are:

ac

250V  5A

dc

30V    5A

Inductive  loads  should  be  suppressed  to  ensure
that the relay contact ratings are not exceeded.

20

Summary of Contents for Advisor A90-SS

Page 1: ...Issue 2 13th April 2017 Advisor A90 SS Rugged universal process panel meter with multicolour display Issue 2 ...

Page 2: ...nding after commissioning 6 3 Servicing 6 4 Routine maintenance 6 5 Guarantee 6 6 Customer comments 7 Accessories 7 1 Scale card 7 2 Tag information 7 3 Alarms 7 3 1 Alarm relay contacts 7 3 2 Configuration and adjustment 7 3 3 Alarm enable enbl 7 3 4 Setpoint adjustment 5p1 7 3 5 Alarm function hi lo 7 3 6 Alarm relay energised or de energised in alarm condition nd ne 7 3 7 Hysteresis h5tr 7 3 8 ...

Page 3: ...range are selectable on site and the meter display can be calibrated to show the engineering variable represented by the analogue input The engineering units of measurement such as kg gallons hour or ºC can be printed on the slide in scalecard One of the following input ranges may be selected Voltage input 0 to 100mV 0 to 1V 0 to 10V Current input 4 to 20mA 0 to 50mA Resistance thermometer input 2...

Page 4: ...imultaneously While this button is pushed the meter will display the numerical value and analogue bargraph the meter has been calibrated to display with a maximum input I e 20mA or 1V When released the normal display in engineering units will return If the hold function hold is enabled operating this button will cause the meter to display the highest value since the hold function was last reset by...

Page 5: ...ly and all other outputs which allows the A90 SS meter to measure the current in any process loop without affecting the accuracy of the loop When connected in series with a current loop the A90 SS panel meter introduces the following voltage drops At 20mA 1 0V At 50mA 1 5V Fig 2 shows how the A90 SS panel meter should be connected to measure a process current Fig 2 A90 SS Process panel meter measu...

Page 6: ...r two and three wire resistance thermometers and Fig 5 the connections for differential measurements Fig 4 Connections for a 2 or 3 wire resistance thermometer Fig 5 Connections for differential resistance thermometer measurements 6 ...

Page 7: ...rthing The A90 SS panel meter complies with the Low Voltage Directive 2014 35 EU and has the following isolation between circuits AC powered model supply input 3kV rms DC powered model supply input 1 5kV Alarm contacts 4kV rms All other circuits 500V rms The A90 SS stainless steel enclosure is totally isolated from the meter circuits but for personnel safety should be earthed This can be achieved ...

Page 8: ...ght hand end 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 meter from the panel or opening the instrument enclosure New meters are supplied with a printed scale card showing the requested units of measurement If this information is not supplied ...

Page 9: ...it and the button to move control to the next digit When the correct four digit code has been entered pressing will cause the first parameter input to be displayed If the code is incorrect or a button is not pressed within twenty seconds the meter will automatically return to the display mode Once within the configuration menu the required parameter can be reached by scrolling through the menu usi...

Page 10: ...ut may be any value Using 2Ero function set required display at the minimum of the selected range by pressing or and to move to the next digit Similarly using 5PAn function set required display at the maximum analogue input of the selected range E P P E Only appears when RTD inputs are selected Only appears when RTD inputs are selected P E P E P E E Trim temperature display With an accurate input ...

Page 11: ... E E Define Security Code Enter by pressing to move to next digit Reset indicator configuration Confirm selection by entering 5urE by pressing or and to move to next digit P P P E E Define Security Code Enter by pressing or and to move to next digit P pcs U PSs holds Hold Function Press or to turn Hold on or oFF When fitted optional 4 20mA current output appears here Only appears when voltage or c...

Page 12: ...tion within the function should normally be set to the same as that selected for the dp function See section 5 6 Display Summary of function CAL Calibration of the digital display using an external source only for current or voltage inputs Enables the zero and span of the meter to be adjusted using an external current or voltage source such as a calibrator When used with an accurate traceable sour...

Page 13: ...ter display to be selected 5el Select one of 7 preset colours edit Adjust preset colours r5et Reset presets to factory defaults See section 5 14 CodE Security code Defines a four digit alphanumeric code that must be entered to gain access to the configuration menu Default code 0000 disables this security function and allows unrestricted access to all configuration functions See section 5 15 r5Et R...

Page 14: ...n to the configuration menu 5 4 Units of temperature deg This configuration function only appears in menu when the A90 SS panel meter is configured for a resistance thermometer input One of the following five may be selected Display Units of display ºC Degree Celsius H Kelvin ºF Degree Fahrenheit r Degree Rankine re5 Resistance in ohms To reveal the existing units of display select deg from the co...

Page 15: ...r control to the decimal point which should normally be positioned in the same place defined in the dp function When set as required press to enter the new span and return to the 5PAn prompt Finally press again to return to the configuration menu Notes a The A90 SS meter input current or voltage must be adjusted to the required value before the 2ero and 5pan functions are entered by pressing the b...

Page 16: ...med in the same way as the lower reading When the A90 SS meter upper display is correct press to return to the 5pan prompt The sub function clr t removes any zero and span trim that has been applied and returns the A90 SS meter s temperature display calibration to the Pt100 figures specified in IEC 60751 To clear trim select tri from the A90 SS meter configuration menu and press the button which r...

Page 17: ... the tare annunciator To check or change the tare function select tARE in the configuration menu and press to reveal the current setting Pressing the or button will toggle the setting between on and oFF When set as required press to return to the tARE prompt in the configuration menu 5 13 Maximum and minimum hold function hold When enabled the panel meter will store the maximum and minimum display...

Page 18: ...has occurred See section 7 3 12 5 15 Security code CodE Access to the meter configuration menu may be protected by a four digit security code which must be entered to gain access New instruments are configured with the default security code 0000 which allows unrestricted access to all configuration functions To enter a new security code select CodE from the configuration menu and press P which wil...

Page 19: ...de has been lost 6 2 Fault finding after commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE If an A90 SS panel meter fails after it has been functioning correctly follow the procedure shown in section 6 1 If this does not reveal the cause of the fault please contact one of our technical application engineers for advice 6 3 Servicing All A90 SS meters are interchangeable providing the re...

Page 20: ...h as an emergency shut down system The A90 SS panel meter can be supplied with factory fitted dual alarms each having a single pole changeover relay contact output Each alarm may be independently conditioned as a high or low alarm When the A90 SS panel meter power supply is removed both alarm outputs will be de energised This condition should be chosen as the alarm condition when designing an alar...

Page 21: ...21 ...

Page 22: ...ised in non alarm condition Determines whether the alarm relay is energised or de energised in the non alarm condition See section 7 3 6 H5tr Hysteresis Adjusts the alarm hysteresis See section 7 3 7 dELA Alarm delay Introduces adjustable delay between the display equalling the setpoint and the alarm being activated See section 7 3 8 5iL Alarm silence time Defines the time that the alarm output re...

Page 23: ...eveal the existing setting The function may be changed by pressing the or followed by the button to return to the alarm configuration menu 7 3 7 Hysteresis H5tr Hysteresis is shown in the units that the meter has been calibrated to display To adjust the hysteresis select H5tr from the alarm menu and press which will reveal the existing hysteresis with one digit flashing The flashing digit can be a...

Page 24: ...wed by the button to return to the alarm menu 7 3 11 Latch alarm output Latch For some applications it is desirable to retain the A90 SS meter alarm output after the alarm condition no longer exists When enabled the latch function retains the alarm output even if the alarm condition no longer exists until it is manually cleared by operating the button in the meter display mode To enable the functi...

Page 25: ...isplay mode Access to the alarm setpoints from the A90 SS meter display mode is obtained by operating the and buttons simultaneously as shown in Fig 13 If the setpoints are not protected by a security code the alarm setpoint prompt 5P1 will be displayed If the setpoints are protected by a security code Code will be displayed first pressing again will result in 0000 being displayed with the first d...

Page 26: ...ion is shown by a flashing bargraph scale with no activated bars 7 4 4 20mA output and transmitter supply The A90 SS panel meter can be supplied with a factory fitted isolated 4 20mA current sink and a galvanically isolated 24V dc supply as shown in Fig 1 Connecting the 24V supply in series with the current sink produces a 4 20mA current source output The 24V dc output may also be used to power a ...

Page 27: ...on and calibration When an A90 SS meter is supplied with an optional 4 20mA output the configuration menu is extended as shown in Fig 18 The 4 20mA output is controlled by the A90 SS meter display The A90 SS meter displays corresponding to 4mA and 20mA outputs are defined in the sub menu Unless the fault function is activated the 4 20mA output range is 3 8mA to 20 5mA When the 4 20mA output is dis...

Page 28: ... existing display with one digit flashing The 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 A90 SS meter calibration is changed the 4 20mA output will be disabled and the output current w...

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