BEKA A504G-SS-PM User manual

Issue: 1
11th September 2018
BA504G-SS-PM
and BA524G-SS-PM
general purpose
loop-powered
panel mounting indicators
Issue 1

2
1. Description
2. Operation
2.1 Controls
3. Applications
3.1 Transmitter loops
3.2 Remote indication
4. Installation
4.1 Location
4.2 Installation procedure
4.3 EMC
4.4 Units of measurement and tag marking
on scale card.
5. Configuration and Calibration
5.1 Summary of configuration functions
5.2 Indicator function: FunC
5.3 Resolution: rE5n
5.4 Position of the decimal point: dP
5.5 Calibration using an external current
source: CAL.
5.6 Calibration using internal references: 5et
5.7 Bargraph format and calibration: bAr
5.8 Function of the (push-button: C--P
5.9 Tare function: tArE
5.10 Security code: CodE
5.11 Reset to factory defaults: r5Et
5.12 Under and over-range
6. Lineariser
6.1 Lineariser calibration using an external
current source.
6.1.1 Example, Adding break-points
to a new indicator.
6.2 Lineariser calibration using internal
reference.
6.2.1 Example, Adding break-points
to a new indicator.
6.3 Under and over-range
6.4 Default configuration
7. Maintenance
7.1 Fault finding during commissioning
7.2 Fault finding after commissioning
7.3 Servicing
7.4 Routine maintenance
7.5 Guarantee
7.6 Customer comments
8. Accessories
8.1 Units of measurement and instrument
identification.
8.2 Display backlight
8.2.1 Loop powering the backlight
8.2.2 Separately powering the
backlight.
8.3 Alarms
8.3.1 Solid state output
8.3.2 Configuration and adjustment
8.3.3 Alarm enable: EnbL
8.3.4 Setpoint adjustment:
5P1 and 5P2.
8.3.5 Alarm function: Hi .Lo
8.3.6 Alarm output status: no .nC
8.3.7 Hysteresis: H5tr
8.3.8 Alarm delay: dELA
8.3.9 Alarm silence time: 5iL
8.3.10 Flash display when alarm
occurs: FL5H.
8.3.11 Access setpoint in display
mode: AC5P.
8.3.12 Adjusting alarm setpoints from
the display mode.
8.3.13 Display setpoints on
BA524G-SS-PM bargraph.
CONTENTS
The BA504G-SS-PM and BA524G-SS-PM are CE marked to
show compliance with the European EMC Directive 2014/30/EU

3
1. DESCRIPTION
These rugged panel mounting, general purpose
digital indicators display the current flowing in a
4/20mA loop in engineering units. They are loop
powered but only introduce a 1.2V drop, which
allows them to be installed into almost any 4/20mA
current loop. No additional power supply or battery
is required.
Both models are electrically similar, but have
different size displays.
Model Display
BA504G-SS-PM 4 digits 34mm high
in stainless steel
enclosure.
BA524G-SS-PM 5 digits 29mm high with
31 segment bargraph.
in stainless steel
enclosure.
This instruction manual supplements the
instruction sheet supplied with each instrument.
The main application of both models is to display a
measured variable or control signal in a process
area. The zero and span of the display are
independently adjustable so that the indicator can
be calibrated to display any variable represented
by the 4/20mA current, e.g. temperature, flow,
pressure or level.
The BA504G-SS-PM and the BA524G-SS-PM are
not certified for use in explosive atmospheres. For
hazardous area applications, the BA304G-SS-PM,
or the BA324G-SS-PM should be used.
2. OPERATION
Fig 1 shows a simplified block diagram of all
models. The 4/20mA input current flows through
resistor R1 and forward biased diode D1. The
voltage developed across D1, which is relatively
constant, is multiplied by a switch mode power
supply and used to power the instrument. The
voltage developed across R1, which is proportional
to the 4/20mA input current, provides the input
signal for the analogue to digital converter.
Each time a 4/20mA current is applied to the
instrument, initialisation is performed during which
all segments of the display are activated, after five
seconds the instrument displays the input current
using the calibration information stored in the
instrument memory. If the loop current is too low
to power the instrument the indicator will display
the error message LPLo.
Fig 1 Indicator block diagram

4
2.1 Controls
Both models are controlled and calibrated via four
front panel push buttons. In the display mode i.e.
when the indicator is displaying a process variable,
these push buttons have the following functions:
(While this button is pushed the
indicator will display the input current
in mA, or as a percentage of the
instrument span depending upon how
the indicator has been configured.
When the button is released the
normal display in engineering units
will return. The function of this push
button is modified when optional
alarms are fitted to the indicator.
&While this button is pushed the
indicator will display the numerical
value and analogue bargraph* the
indicator has been calibrated to
display with a 4mAΦinput. When
released the normal display in
engineering units will return.
*While this button is pushed the
indicator will display the numerical
value and analogue bargraph* the
indicator has been calibrated to
display with a 20mAΦinput. When
released the normal display in
engineering units will return.
)No function in the display mode
unless the tare function is being used.
(+ &Indicator displays firmware number
followed by version.
(+ *Provides direct access to the alarm
setpoints when the indicator is fitted
with optional alarms and the AC5P
access setpoints function has been
enabled.
(+ )Provides access to the configuration
menu via optional security code.
Note: * BA524G-SS-PM only
ΦIf the indicator has been
calibrated using the CAL
function, calibration points may
not be 4 and 20mA.
3. APPLICATIONS
3.1 Transmitter loops
Both models may be connected in series with
almost any 4/20mA current loop and calibrated to
display the measured variable or control signal in
engineering units.
Fig 2 illustrates a typical application in which an
indicator is connected in series with a 2-wire
transmitter.
Fig 2 Indicator in transmitter loop
Considering the example shown in Fig 2, the sum
of the maximum voltage drops of all the
components in the loop must be less than the
minimum power supply voltage.
Minimum operating voltage of 2-wire Tx 10.0
Maximum voltage drop caused by controller 5.0
Maximum voltage drop caused by indicator 1.3
Maximum voltage caused by cables 0.4
_____
16.7V
Therefore in this example at 20mA the power
supply must have a minimum output of 16.7V
3.2 Remote indication
All models may be driven from any 4/20mA signal
to provide a remote indication. Fig 3 shows a
typical application in which the 4/20mA output from
a gas analyser is connected to a BA504G-SS-PM
loop powered indicator to provide a remote
indication of the analyser’s output. Again it is
necessary to ensure that the voltage capability of
the 4/20mA source is greater than the sum of the
voltage drops introduced by the indicator and the
cable resistance.

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Fig 3 Indicator providing a remote display
4. INSTALLATION
4.1 Location
BA504G-SS-PM and BA524G-SS-PM indicators
have a 316 stainless steel enclosure. Both have
IP66 front of panel ingress protection after a 7J
impact and have a thick armoured window which
will withstand a 4J impact. They are suitable for
exterior mounting in most industrial and marine
environments.
The indicators should be positioned where the
display is not in continuous direct sunlight.
Panel wiring terminals are located on the rear of
the indicator as shown in Fig 6 which has IP20
protection. Terminals 2 and 4 are internally joined
and may be used for linking the return 4/20mA wire
- see Fig 1.
4.2 Installation Procedure
Fig 4 shows the recommended panel cut-out
dimensions and Fig 5 the installation procedure.
The panel should be flat and there should be no
burrs or rough edges on the cut-out.
a. Position the black moulded silicone gasket
onto the indicator's stainless steel casting.
b. Secure the indicator assembly onto the panel
using the four supplied M5 x 16 stainless
steel hexagon headed screws and spring
washers. Ensure that the casting is correctly
positioned in the gasket and that the gasket is
flat and in continuous contact with the panel
before evenly tighten the four screws to
40cN-m.
CAUTION
If the instrument panel has a non-
conductive finish, an earthed ring tag
should be fitted under one of the screw
heads to ensure that the indicator is
earthed.
c. Connect panel wiring to the indicator
terminals as shown in Fig 6.
Fig 4 Recommended panel cut-out dimensions
Fig 5 BA504G-SS-PM and BA524G-SS-PM
installation procedure.
Fig 6 Terminals and overall dimensions

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4.3 EMC
Both models comply with the requirements of the
European EMC Directive 2014/30/EU. For
specified immunity all wiring should be in screened
twisted pairs, with the screens earthed at one point
in the safe area.
4.4 Units of measurement and tag marking
on scale card.
The indicator’s units of measurement and tag
information are shown on a scale card which slides
into the indicator.
New indicators 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 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 accessory.
To remove the scale card from an indicator
carefully pull the transparent tab at the rear of the
indicator assembly away from the indicator as
shown in Fig 7a.
Fig 7a Removing scale card
To replace the scale card carefully insert it into the
slot on the right hand side of the input terminals as
shown in Fig 7b. Force should be applied evenly
to both sides of the scale card to prevent if
twisting. The card should be inserted until about
2mm of the transparent tab remains protruding.
Fig 7b Inserting scale card into the
instrument assembly.

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5. CONFIGURATION AND CALIBRATION
Both indicators are configured and calibrated via
four front panel push buttons. The configuration
functions are contained in an easy to use intuitive
menu that is shown diagrammatically in Fig 8.
Each menu function is summarised in section 5.1
and includes a reference to more detailed
information. When the indicator is fitted with
alarms additional functions are added to the menu
which are described in section 8.3
Throughout this manual push buttons are shown
as (,),&or *, and legends displayed by
the indicator are shown in a seven segment font as
displayed by the indicator e.g. CAL and ALr2.
Access to the configuration menu is obtained by
operating the (and )push buttons
simultaneously. If the indicator security code is
set to the default 0000 the first parameter FunC will
be displayed. If a security code other than the
default code 0000 has already been entered, the
indicator will display CodE. Pressing the (button
will clear this prompt allowing each digit of the
code to be entered using the &or *push button
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 FunC to
be displayed. If the code is incorrect, or a button
is not pressed within twenty seconds, the indicator
will automatically return to the display mode.
Once within the configuration menu the required
parameter can be reached by scrolling through the
menu using the &or *push button as shown in
Fig 8. When returning to the display mode
following recalibration or a change to any function,
the indicator will display dAtA followed by 5AVE
while the new information is stored in permanent
memory.
All new indicators are supplied calibrated as
requested at the time of ordering. If calibration is
not requested, indicators will be supplied with the
following default configuration:
Default Configuration
BA504G-SS-PM BA524G-SS-PM
Access code CodE 0000 0000
Function FunC Linear Linear
Display at 4mA 2ero 0.0 0.00
Display at 20mA 5PAn 100.0 100.00
Resolution rE5n 1 digit 1 digit
Bargraph start BarLo ----- 0.00
Bargraph finish BarHi ----- 100.00
(button in display % %
mode C--P
Tare tArE Off Off
5.1 Summary of configuration functions
This section summarises each of the main
configuration functions and includes a cross
reference to a more detailed description. Fig 8
illustrates the location of each function within the
configuration menu. The lineariser and the
optional factory fitted alarms are described
separately in sections 6 and 8.3 of this manual.
Display Summary of function
FunC Indicator function
Defines the relationship between the
4/20mA input current and the indicator
display. May be set to:
5td Standard linear relationship
root Square root extraction
Lin 16 segment adjustable
lineariser – see section 6.
See section 5.2
rE5n Display resolution
Defines the resolution of the least
significant display digit. May be set to
1, 2, 5or 10 digits.
See section 5.3
dP Decimal point
Positions a dummy decimal point
between any of the digits or turns it off.
See section 5.4
CAL Calibration of the digital display using
an external current source.
Enables the zero and span of the
indicator to be adjusted using an external
current source such as a calibrator.
When used with an accurate traceable
current source this is the preferred
method of calibration.
See section 5.5
5Et Calibration of display using internal
references.
Enables the zero and span of the
indicator to be adjusted without the need
for an accurate input current or
disconnection from the 4/20mA loop. See
section 5.6
bAr Bargraph format and calibration
Only the BA524G-SS-PM has a bargraph
The bargraph may be conditioned to start
from left, right or centre of the display, or
it may be disabled. When optional
alarms are fitted it can also display both
alarm setpoints and the measured value.
The bargraph may be calibrated to start
and finish at any value within the
indicator’s calibrated digital display.
See section 5.7

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Display Summary of function
C--P Function of (push button
The indicator may be configured to
display the input current in milliamps, or
the input current as a percentage of the
4/20mA input when the (push button is
operated in the display mode.
See section 5.8
tArE Tare function
When enabled the tare function sets the
indicator display to zero when the )
push button is operated in the display
mode.
See section 5.9
CodE Security code
Defines a four digit numeric 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 conditioning
functions.
See section 5.10
r5Et Reset
Contains two sub-functions, ConF which
returns the indicator to the default
conditions shown in section 5.0 and LtAb
which returns the lineariser to the default
conditions shown in section 6.4. To
prevent accidental use both resets must
be confirmed by entering 5urE before
they will be executed.
See section 5.11

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5.2 Indicator function: FunC
This configuration function defines the relationship
between the indicator’s 4/20mA input current and
the indicator’s display. Three alternatives are
available:
5td Standard linear relationship
root Square root extraction
Lin 16 segment adjustable lineariser
To reveal the existing indicator function select FunC
from the configuration menu and press (.Ifthe
function is set as required, press )to return to
the menu, or press the &or *button to change
the setting, followed by the )button to return to
the configuration menu.
5td Linear
Provides a linear relationship between
the 4/20mA indicator input current and
the indicator display.
root Square root extraction
Primarily intended to linearise the square
law 4/20mA output from differential
flowmeters.
For reference, the following table shows
the output current from a non-linearised
differential flowmeter.
% of full flow Current output mA
2.5 4.01
10.0 4.16
25.0 5.00
50.0 8.00
75.0 13.00
100.0 20.00
When the root function is selected the
indicator will display flow in linear units.
Lin 16 segment adjustable lineariser
Enables non-linear variables to be
displayed by the indicator in linear
engineering units. Use of the lineariser is
described in section 6 of this instruction
manual.
5.3 Resolution: rE5n
This function defines the resolution of the least
significant display digit. Decreasing the display
resolution can improve the readability of a noisy
signal. Select rE5n from the menu and press
(which will reveal the current display resolution.
To change the resolution press the &or *
button to select 1,2,5or 10 digits, followed by the
)button to enter the selection and return to the
configuration menu.
5.4 Position of the decimal point: dP
A dummy decimal point can be positioned between
any of the digits or it may be absent. To position
the decimal point select dP from the menu and
press (. The decimal point can be moved by
pressing the &or *push button. If a decimal
point is 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.
5.5 Calibration using an external
current source: CAL.
This function enables the zero and span of the
indicator to be adjusted using an external
calibrated current source. When used with an
accurate traceable current source this is the
preferred method of calibration.
Zero is the indicator display with 4mA input
Span is the indicator display with 20mA input
To calibrate the indicator select CAL from the
configuration menu and press (. The indicator
will display 2Ero which is a request for a 4mA input
current. Adjust the external current calibrator to
4.000mA and again press (which will reveal the
current zero display. The flashing digit of the
indicator display can be changed by pressing the
&or *button, when set as required pressing
(will transfer control to the next digit. When all
the digits have been adjusted, press )to enter
the new zero and return to the 2Ero prompt .
Pressing the *button will cause the indicator to
display 5PAn which is a request for a 20mA input
current. Adjust the external current calibrator to
20.000mA and again press (which will reveal
the existing span display. The flashing digit of the
indicator display can be changed by pressing the
&or *button, when set as required pressing
(will transfer control to the next digit. When all
the digits have been adjusted press )to enter
the new span and return to the 5PAn prompt.
Finally press )again to return to the
configuration menu.
Notes:
a. The indicator input current must be adjusted to
the required value before the zero and span
functions are entered by pressing the
(button.
b. Indicators may be calibrated at currents other
than 4 and 20mA, within the range 3.8 to
21.0mA providing the difference between the
two currents is greater than 4mA. If these
conditions are not complied with, the indicator
displays FaiL and aborts the calibration.
c. If the zero current is greater than the span
current the instrument will be reverse acting i.e.
an increasing input current will cause the
display to decrease.