BEKA BA537E User manual

Issue: 5
9th July 2019
BA537E and BA538E
One input
General Purpose
pulse input
Rate Totalisers
Issue 5

1. Description
2. Operation
2.1 Initialisation
2.2 Controls
2.3 Displays
2.3.1 Display over-range
3. System Design
3.1 Power supply
3.2 Pulse input
3.2.1 Switch contact input
3.2.2 Open collector input
3.2.3 2-wire proximity detector input
3.2.4 Magnetic pick-off input
3.2.5 Voltage pulse input
3.3 Remote reset
4. Installation
4.1 Location
4.2 EMC
4.3 Installation procedure
4.4 Scale card
5. Configuration and Calibration
5.1 Configuration structure
5.2 Accessing configuration functions
5.3 Summary of configuration functions
5.4 Rate totaliser function: function
5.5 Input: input
5.6 Input type: inp .type
5.7 Debounce: debounce
5.8 Display update interval: update
5.9 Upper display: di5p-1
5.10 Lower display: di5p-2
5.11 Position of decimal points: dp
5.12 Flowmeter K-factor: factor
5.13 Total scale factor: 5cale .t
5.14 Rate scale factor: 5cale .r
5.15 Timebase: t-ba5e
5.16 Display filter: filter
5.17 Clip-off: clp off
5.18 Local reset: loc clr
5.19 Local total reset: clr tot
5.20 Local grand total reset: clr gtot
5.21 Grand total reset from configuration menu:
clr gtot
5.22 Define security code: code
5.23 Reset to factory defaults: r5et def
6. Lineariser
6.1 Flowmeter specifications
6.2 Summary of lineariser configuration
functions.
6.3 Add a segment: add
6.4 Remove a segment: del
6.5 Input frequency: pul5efre
6.6 K-factors: l-factor
6.7 Lineariser error messages
7. Configuration example
7.1 Configuration procedure
8. Maintenance
8.1 Fault finding during commissioning
8.2 Fault finding after commissioning
8.3 Servicing
8.4 Routine maintenance
8.5 Guarantee
8.6 Customer comments
9. Accessories
9.1 Scale card
9.2 Tag information
9.3 Backlight
9.4 Alarms
9.4.1 Solid state output
9.4.2 Configuration and adjustment
9.4.3 Alarm enable: enbl
9.4.4 Type of alarm: type
9.4.5 Setpoint adjustment: 5p1x and 5p2x
9.4.6 Alarm function: hi.lo
9.4.7 Alarm output status: no.nc
9.4.8 Hysteresis: h5tr
9.4.9 Alarm delay: dela
9.4.10 Alarm silence time: 5il
9.4.11 Flash display: fl5h
9.4.12 Access setpoint: ac5p
9.4.13 Adjusting alarm setpoints
from totalisation mode:
9.5 Pulse Output
9.5.1 System design
9.5.2 Configuration
9.5.3 Pulse output: pul5e op
9.5.4 Enable: enbl
9.5.5 Pulse source: 5ource
9.5.6 Output pulse frequency: divide
9.5.7 Output pulse width: duration
9.5.8 Pulse storage
9.6 4/20mA output
9.6.1 System design
9.6.2 Configuration
9.6.3 4/20mA output: 4-20op
9.6.4 Enable 4/20mA output: Enbl
9.6.5 Select rate or total source: 4-20type
9.6.6 Display for 4mA output: 4.000
9.6.7 Display for 20mA output: 20 .000
222222222222222222222222
The BA537E and BA538E are CE marked to show compliance with the European EMC Directive 2014/30/EU
CONTENTS

1. DESCRIPTION
These general purpose, one input rate totalisers are
primarily intended for use with pulse output
flowmeters. The instruments simultaneously display
the rate of flow and the total flow in the same or
different engineering units on two separate displays.
They are controlled and configured via the four front
panel push buttons, a user defined four digit code
may be entered to prevent accidental access to the
instrument's configuration menu.
The two models are electrically similar, but have
different size displays and enclosures. The available
factory fitted accessories also vary.
Model Displays Bezel size
BA537E 8 digits 9mm high 96 x 48mm
6 digits 6mm high
BA538E 8 digits 18mm high 144 x 72mm
6 digits 12mm high
This instruction manual supplements the abbreviated
instruction sheet supplied with each instrument.
2. OPERATION
Fig 1 shows a simplified block diagram of the BA537E
and BA538E Rate Totalisers. The instruments can
accept pulses from most types of flowmeter
transducers. When connected to a pulse output
flowmeter the BA537E and BA538E will provide an
accurate display of the rate of flow and the total flow
in the same or different engineering units. The
internal lineariser, which can have up to sixteen
straight-line segments, may be calibrated to
compensate for flowmeter non-linearity.
The BA537E and BA538E have a single pair of input
terminals for connection to all types of transducer.
When counting pulses from a transducer requiring
energising, such as a switch contact, open collector or
a two wire proximity detector, an external link between
terminals 3 and 4 supplies power to the transducer
input terminals.
Factory fitted accessories include an internally
powered display backlight, dual alarms and an
isolated 4/20mA output which may be configured to
retransmit the rate or total display.
The larger BA538E Rate Totaliser is always supplied
with an isolated pulse output which can be
configured to synchronously retransmit the pulse
input, or the flow total. This output is only available
on the smaller BA537E Rate Totaliser as an option.
Factory fitted optional accessories for the two
models are shown below:
BA537E BA538E
96 x 48mm 144 x 72mm
Backlight Backlight
Isolated dual alarms* Isolated dual alarms
or
Isolated 4/20mA output* Isolated 4/20mA output
or
Isolated pulse output*
*Only one output option Isolated pulse output
may be fitted to BA537E always fitted to BA538E
Fig 1 BA537E and BA538E block diagram
2.1 Initialisation
Each time power is applied to the Rate Totaliser
initialisation is performed. After a short delay the
following display sequence occurs:
All segments of the display are activated
Instrument starts functioning using the
configuration information stored in permanent
memory. Unless total and grand total
displays have been reset to zero, new flow will
be added to the existing totals.
3

2.2 Controls
The BA537E and BA538E are controlled and
configured via four front panel push buttons. In the
totalisation mode i.e. when the instrument is
displaying rate and total flow the push button
functions are:
Push Button Functions
) + &Grand total - shows Lo followed by least
significant 8 digits of the 16 digit grand
total.
)+ *Grand total - shows Hi followed by the
most significant 8 digits of the 16 digit
grand total.
If Local Grand Total Reset CLr Gtot in
the instrument configuration menu has
been activated, operating the )+*
buttons for ten seconds will result in
Clr.no being displayed with the no
flashing. Operating the &or *button
will change the display to CLr–.–YE5,the
)button will then reset the grand total
to zero which will be confirmed by a brief
display of Gt Clrd. See 5.20
&+ * If Local Total Reset CLr tot in the
instrument configuration menu has been
activated, operating the &+*buttons
for three seconds will reset the total
display to zero and clear any pulses
stored in the optional pulse output.
The Grand Total is not reset.
See 5.19
(+ &Shows in succession, firmware version
number, instrument function totali5e
and any output accessories that are
fitted:
- A Dual alarm outputs
- P Pulse output
- C 4/20mA output
( + *Provides direct access to the alarm
setpoints when the Rate Totaliser is fitted
with optional alarms and the AC5P
setpoints function has been enabled.
See 9.4.13
(+ )Access to configuration menu
2.3 Displays
The BA537E and BA538E have two digital displays
and associated annunciators, plus a flow indicator
as shown on the front cover of this manual.
Total Shows the total flow on the
display upper eight digit display. May
be reset to zero via front panel
push buttons or by a remote
reset switch.
Rate Shows the flow rate on the
Display lower six digit display.
Flow This disc in the lower left
indicator hand corner of the display
'rotates' for two seconds each
time an input pulse is received.
Appears to rotate continuously
when input frequency exceeds
0.5Hz.
Hold Activated when input
annunciator frequency is below the clip-off
threshold.
Reset Activated while instrument is
annunciator being reset via the front panel
push buttons, or the external
reset terminals.
Rate Identifies rate display
annunciator
Total Identifies total display
annunciator
RTx Retransmitted pulse
annunciator annunciator.
Depends upon the setting of
5ource in the pulse output
configuration menu.
5caled:
Annunciator activated each
time pulse output open
collector is on,i.e.Ronis
less than 60+ 3V.
direct:
Annunciator continuously
activated.
2.3.1 Display over-range
Over-range of the upper eight digit display or the
lower six digit display is indicated by all the digits
displaying 9and all the decimal points flashing.
4

3. SYSTEM DESIGN
Fig 2 illustrates the basic circuit that is used for all
BA537E and BA538E installations. For simplicity,
connections for the pulse output and optional alarms
and 4/20mA output are shown separately in section
10 of this manual.
Fig 2 Basic BA537E and BA538E system
When designing a system it is important to remember
that terminals 2, 6 and RS2 are interconnected within
the BA537E and the BA538E See Fig 1.
3.1 Power supply
The BA537E and the BA538E Rate Totalisers require
a dc supply voltage between 10V and 30V at
terminals 1 & 2 and consume:
10mA without optional backlight
plus 6mA when terminals 3 & 4 are linked
As shown in Fig 1 terminals 2, 6 and RS2 of the
BA337E and BA338E Rate Totalisers are internally
connected together. Therefore these terminals should
only be connected to the same, or to an isolated
circuit.
3.2 Pulse input
As shown in Figs 2 the BA537E and the BA538E
can display the rate and total flow from flowmeters
with a wide variety of pulse outputs.
The following table shows the Rate Totaliser's input
switching thresholds when conditioned for use with
flowmeters having different outputs, For reliable
totalisation the Rate Totaliser pulse input must fall
below the lower threshold and rise above the upper
threshold.
Input transducer
Switching thresholds
Lower Upper
Open collector 2k10k
Voltage pulse low 1.0V 3.0V
Voltage pulse high 3.0V 10.0V
Magnetic pick-off 0mV 40mV peak
Proximity detector 1.2mA 2.1mA
Switch 1001000
Flowmeters with a switch contact, proximity detector
or an open collector output collector output require
energising which is achieved by linking Rate
Totaliser terminals 3 and 4 together.
3.2.1 Switch contact input
Any flowmeter with a mechanically or magnetically
activated switch contact may be directly connected
to the pulse input terminals 5 and 6. The BA537E
and the BA538E contain a configurable debounce
circuit to prevent contact bounce being counted.
See section 5.7.
3.2.2 Open collector input
Flowmeters with an open collector output may be
directly connected to input terminals 5 & 6. Polarity
of the sensor should be observerd. The BA537E
and BA538E contain a configurable debounce circuit
to prevent false triggering. Three levels of de-
bounce protection are independently available. See
section 5.7.
3.2.3 2-wire proximity detector input
Most flowmeters incorporating a NAMUR 2-wire
proximity detector may be directly connected to a
BA537E or BA538E input, providing the minimum
operating voltage of the flowmeter (proximity
detector) is less than 7.5V. The Rate Totalisers
contain a configurable debounce circuit to prevent
false triggering. Three levels of debounce protection
are independently available. See section 5.7.
5

3.2.4 Magnetic pick-off input
Flowmeters incorporating a magnetic pick-off to
sense flow will have a low level voltage output unless
the flowmeter incorporates an amplifier. CoiL in the
BA537E and BA538E input configuration menu is a
low level voltage pulse input intended for use with a
magnetic pick-off. The Rate Totalisers contain a
configurable debounce circuit to prevent false
triggering of the instrument. See section 5.7.
3.2.5 Voltage pulse input
Two voltage pulse input ranges are selectable in the
BA537E and BA538E Rate Totaliser configuration
menu, VoLt5 L and VoLt5 H as shown in section 3.2.
The Rate Totalisers contain a configurable debounce
circuit to prevent false triggering of the instrument.
Three levels of de-bounce protection are
independently available.
See section 5.7.
3.3 Remote reset
The Rate Totaliser's total display may be remotely
reset to zero by connecting terminals RS1 and RS2
together for more than one second. Permanent
interconnection inhibits totalisation. Remote resetting
may be accomplished by any switch contact.
Note: Both Rate Totalisers may be configured to
reset the total display to zero by operating the
&and *push buttons simultaneously for
more than two seconds in the totalising mode
i.e. when the instrument is displaying flow.
See 5.19
6

4. INSTALLATION
4.1 Location
Both models have a robust glass reinforced Noryl
enclosure with a toughened glass window. The fronts
of the Rate Totalisers have IP66 ingress protection
and a gasket seals the joint between the instrument
enclosure and the panel. The rear of both Rate
Totalisers have IP20 ingress protection.
Figs 3A and 3B show the overall dimensions of the
96 x 48mm BA537E and the 144 x 72mm BA538E
and the recommended panel cut-out dimensions. To
achieve an IP66 seal between the instrument
enclosure and the instrument panel the smaller
tolerance aperture must be used, and the BA538E
must be secured with four panel mounting clamps.
Cut-out dimensions
Recommended for all installations.
Mandatory to achieve an IP66 seal
between the instrument and the panel
90 +0.5/-0.0 x 43.5 +0.5/-0.0
DIN 43 700
92.0 +0.8/ -0.0 x 45 +0.6 -0.0
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 3A BA537E dimensions & terminals
Cut-out dimensions
Recommended for all installations.
Mandatory to achieve an IP66 seal
between the instrument and the panel
136.0 +0.5/-0.0 x 66.2 +0.5/-0.0
DIN 43 700
138.0 +1.0/-0.0 x 68.0 +0.7/-0.0
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 3B BA538E dimensions & terminals
Although the front of both Rate Totalisers have IP66
protection, they should be shielded from direct
sunlight and severe weather conditions.
The Rate Totalisers may be installed in any panel
providing that the operating temperature is between
-40ºC and +70ºC. At temperatures below -20ºC the
display digits will change more slowly and contrast
will be reduced, but the instruments will continue to
function and totalise.
4.2 EMC
The BA537E and BA538E 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.
7

4.3 Installation Procedure
a. Cut the specified aperture in the panel. To
achieve an IP66 seal between the instrument
enclosure and the instrument panel the aperture
must have the tighter tolerances specified in
Figs 3A and 3B.
b. Slide the gasket over the body of the Rate
Totaliser before inserting the instrument into the
panel aperture.
c. Firstly ensure that all the panel mounting clamps
are closed by turning the knurled screws fully
anti clockwise until the two pips in the clamp foot
align with holes in the clamp body.
d. Place a clamp in the recess on each side of the
Rate Totaliser, pulling gently to slide it onto the
dovetail as shown in Fig 4. Push the knurled
screw slightly forward to engage the thread and
tighten by turning clockwise until it is just finger
tight. When the clamps are fitted ensure that
the gasket behind the front panel bezel is
correctly positioned before fully tightening the
clamps to secure the instrument. The maximum
recommended clamp tightening torque is 22cNm
(1.95 lbf in) which is approximately equivalent
to finger-tight plus one half turn. Do not over
tighten.
e. Four panel mounting clamps are required to
achieve an IP66 seal between a BA538E and
the instrument panel.
f. Connect the panel wiring to the rear terminal
block(s) as shown in Figs 3A and 3B. To
simplify installation, the terminals are removable
so that the panel wiring can be completed
before the instrument is installed. To prevent
vibration damage ensure that panel wiring is
supported.
Fig 4 Fitting panel mounting clamps
4.4 Scale card
The Rate Totaliser’s units of measurement are
shown on a printed scale card in a window at the
right hand side 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 5.
Thus the scale card can easily be changed without
removing the Rate Totaliser from the panel or
opening the instrument enclosure.
New Rate Totalisers are supplied with a printed
scale card showing the requested units of
measurement, if this information is not supplied
when the instrument is ordered a blank card will be
fitted.
A pack of self-adhesive scale cards printed with
common units of flow measurement is available as
an accessory from BEKA associates. Custom
printed scale cards can also be supplied.
To change a scale card, unclip the tapered end of
the flexible strip at the rear of the instrument by
gently pushing it upwards and pulling it out of the
enclosure. Peel the existing scale card from the
flexible strip and replace it with a new printed card,
which should be aligned as shown below. Do not fit
a new scale card on top of an existing card.
Install the new scale card by gently pushing the
flexible strip into the slot at the rear of the Rate
Totaliser, when it reaches the internal end-stop
secure it by pushing the end of the flexible strip
downwards so that the tapered section is held by the
rear panel.
Align the self-adhesive
printed scale card onto
the flexible strip and
insert the strip into the
Rate Totaliser as
shown below.
Fig 5 Inserting the flexible strip carrying the scale
card into slot at the rear of Rate Totaliser.
8

5.0 CONFIGURATION & CALIBRATION
The BA537E and BA538E Rate Totalisers are
configured and calibrated via four front panel push
buttons. All the configuration functions are contained
in an easy to use intuitive menu that is shown
diagrammatically in Fig 7.
Each menu function is summarised in section 5.3 of
this manual and each summary includes a reference
to more detailed information. The sixteen segment
lineariser is described separately in section 6.
Configuration of the isolated pulse output, which is
fitted to all BA538E Rate Totalisers but is an option on
the BA537E, and the optional alarms and 4/20mA
output are described separately in section 9. When
fitted they appear as additional functions within the
configuration menu.
All new Rate Totalisers are supplied calibrated as
requested at the time of ordering. If calibration is not
requested, Rate Totalisers will have default
configuration as shown in the following table, but can
easily be re-configured on-site.
Function Display Default
Access code CodE 0000
Function FunCtion 5td
Input inP .tYPE oP .CoL
Debounce dEbounCE dEFAuLt
Update uPdAtE 0 .5
Upper display di5p-1 totAL
Lower display di5P-2 on
Decimal point dP Rate 0.0
Total 0
K Factor FACtor 1 .0
Total scale factor 5CALE .t1.0
Rate scale factor 5CALE .r1.0
Timebase t-bA5E 5EC
Filter FiLter 24
Clip-off CLP-oFF 0
Local total reset t-rE5Et oFF
Local grand total reset Gt-rE5Et oFF
Security code CodE 0000
Note: While the instrument is being configured
totalisation continues so that any flow occurring during
this time is recorded.
5.1 Configuration structure
Fig 6 shows the BA537E and BA538E calibration
structure. The rate and total display calibrations are
independent which allows the displays to have
different engineering units.
The rate totaliser pulse input is divided by FACtor
which is usually set to the K-factor of the flowmeter,
thus converting the flowmeter output into engineering
units. When the 16 segment lineariser Lin is selected
in the Function sub-menu, up to 16 values for FACtor
may be entered each at a specified input pulse
frequency to compensate for flowmeter nonlinearity.
See section 6.
5CALE-r is a dividing factor that converts the output
from FACtor into the required rate display in
engineering units. e.g. if the output from FACtor is
one pulse per litre and the rate display is required in
gallons, 5CALE-r should be set to 4 . 5461 which is
the number of litres in an imperial gallon.
The timebase t-bA5E is a multiplying factor that
determines if the instrument displays flow per
second, per minute or per hour.
The total flow display is independent of the rate
display. 5CALE-t is a dividing factor that converts
the output from FACtor into the required total display
engineering units. e.g. if the output from FACtor is
one pulse per litre and the total display is required in
thousands of gallons, 5CALE-t should be set to
4,546 .1which is the number of litres in 1,000
imperial gallons.
The BA537E and the BA538E uses ‘real’ decimal
points. Moving the position of a decimal point in a
scale factor will affect the instrument calibration.
Fig 6 Calibration structure
9

5.2 Accessing configuration functions
Throughout this manual push buttons are shown as
&,*,(and )and legends displayed by the
instrument are shown in a seven segment font exactly
as they appear on the instrument display e.g. inPut
and uPdAtE.
Access to the configuration menu is obtained by
operating the (and )push buttons
simultaneously. If the instrument is not protected by
a security code the first parameter FunCtion will be
displayed. If a security code other than the default
code 0000 has already been entered, the instrument
will display CodE.Press(to clear this prompt and
enter the security code for the instrument using the
&or *push button to adjust each digit, and the
(push button to transfer control to the next digit. If
the correct code has been entered pressing )will
cause the first parameter FunCtion to be displayed. If
an incorrect code is entered, or a push button is not
operated within ten seconds, the instrument will
automatically return to the totalisation mode.
All configuration functions and prompts are shown on
the upper eight digit display.
Once within the main configuration menu the required
parameter can be selected by scrolling through the
menu using the &or *push button. The
configuration menu is shown diagrammatically in
Fig 7.
When returning to the totalisation mode following
reconfiguration, the Rate Totaliser will display dAtA
followed by 5AVE while the new information is stored
in permanent memory.
5.3 Summary of configuration functions
This section summarises all the configuration
functions. When read in conjunction with Fig 7 it
provides a quick aid for configuring the Rate
Totaliser. If more detail is required, each section
contains a reference to a full description of the
function.
Display Summary of function
FunCtion Rate Totaliser function
Defines the relationship between the
pulse input and the Rate Totaliser
display. May be set to:
5td Standard linear relationship
Lin 16 segment adjustable
lineariser - see section 7.
See section 5.4
inPut Input
Contains sub-menu with two
functions
inP .tYPE Select Input type
dEbounCE Set debounce
See section 5.5
inP .tYPE
Configures the Rate Totaliser to
accept one of six types of input:
oP,CoL Open collector *
VoLt5 L Voltage pulse <1 >3V
VoLt5 H Voltage pulse <3 >10V
CoiL Magnetic pick-off
Pr .dEt Proximity detector *
ContACt Switch contact *
*Link terminals 3 & 4
See section 5.6
dEbounCE
Defines level of input debounce
applied to the pulse input to prevent
false counting:
dEFAuLt
HEAVY
LiGHt
See section 5.7
UpdAtE Display update interval
Define the interval between display
updates between 0.5 and 5
seconds.
See section 5.8
10

Display Summary of function
di5P-1 Upper display
Defines whether rAtE or totAL is
shown on the upper display. The
other variable will be shown on the
lower display, providing the lower
display is on in function dI5P-2.
See section 5.9
di5P-2 Lower display
Turns the lower display, which
normally shows rate, on or oFF.
See section 5.10
dP Decimal points
Defines the position of the decimal
point in both the rate and total
displays.
See section 5.11
FACtor Flowmeter K-factor
The rate totaliser pulse input is
divided by FACtor, which is usually
set to the K-factor of the flowmeter,
thus converting the flowmeter output
into engineering units. FACtor may be
adjusted between 0.0001 and 99999.
When the 16 segment lineariser Lin
is selected in the Function sub-menu,
up to 16 values for FACtor may be
entered, each at a specified input
pulse frequency to compensate for
flowmeter non-linearity.
See section 5.12
5CALE.t Total Scale Factor
5CALE-t is a dividing factor that
converts the pulse output from FACtor
into the required total display in
engineering units. e.g. if the output
from FACtor is one pulse per litre and
the total display is required in
thousands of gallons, 5CALE-t should
be set to 4546 .1 which is the number
of litres in 1,000 imperial gallons.
5CALE-t may be adjusted between.
0.0001 and 99999.
The total flow display is independent
of the rate display.
See section 5.13
Display Summary of function
5CALE.r Rate scale factor
5CALE . r is a dividing factor that
converts the pulse output from
FACtor into the required rate display
in engineering units. e.g. if the
output from FACtor is one pulse per
litre and the rate display is required
in gallons, 5CALE . r should be set to
4 . 5461 which is the number of litres
in an imperial gallon.
5CALE . r may be adjusted between
0.0001 and 99999. The flow rate
display is independent of the total
flow display.
See section 5.14
t-bA5E Timebase
Selectable multiplier allowing flow
rate to be displayed in units per
second, per minute or per hour.
Select:
tb-01 for flow / second
tb-60 for flow / minute
tb-3600 for flow / hour
See section 5.15
FiLtEr Display filter
An adjustable digital filter to reduce
noise on the rate display is
controlled by two parameters each
adjustable between 0and 9.The
first digit defines the amount of
filtering applied to the display, the
second deviation from the displayed
rate at which the filter will be
overridden and the rate display will
move rapidly to the new value.
See section 5.16
CLP-oFF Clip-off
To prevent totalisation of very low
flow rates, clip-off enables the user
to select a flow rate display below
which totalisation is inhibited.
See section 5.17
11

Display Summary of function
LoC Clr Local reset
Contains sub-menu with two
functions enabling total and grand
total to be reset to zero via the front
panel push buttons when the Rate
Totaliser is in the totalisation mode.
See section 5.18
Local total reset Clr tot
When on is selected total display is
reset when &and *buttons are
operated simultaneously for more
than 3 seconds in the operating
mode.
See section 5.19
Local grand total reset clr gtot
When on is selected the grand total is
reset when )+*buttons are
operated simultaneously for more
than 10 seconds in the operating
mode.
Note: Once reset, the grand total can
not be restored.
See section 5.20
Display Summary of function
CLr-Gtot Reset grand total from
configuration menu.
This function resets the grand total
to zero from within the configuration
menu when CLr YE5 is selected, and
5urE is entered to confirm the
instruction.
Note: Once reset, the grand total
can not be recovered.
See section 5.21
CodE Security code
Defines a four digit alphanumeric
code which must be entered to gain
access to the configuration menu.
Default code 0000 disables the
security function and allows
unrestricted access to all
configuration functions.
See section 5.22
r5Et def Reset to factory defaults
Returns the Rate Totaliser
configuration functions to the factory
default shown in section 6. To
prevent accidental use the request
must be confirmed by entering 5urE
before the reset will be executed.
See section 5.23
12

5.4 Rate Totaliser function: FunCtion
The Rate Totaliser contains an adjustable sixteen
segment lineariser which may be used to compensate
for flowmeter non-linearity. This function turns this
lineariser on or off.
5td Lineariser not activated
Lin Lineariser activated
To reveal the existing Rate Totaliser function select
FunCtion from the configuration menu and press (.
If the function is set as required, press )to return to
the configuration menu, or press the &or *button
to change the setting, followed by the )button to
return to the FunCtion prompt in the configuration
menu.
5td Linear
Provides a linear relationship between the
pulse input and the Rate Totaliser displays.
Lin 16 segment adjustable lineariser
Enables a sixteen segment adjustable
lineariser. When Lin is selected the FACtor
function is expanded to allow up to 16 values
to be entered for different input pulse
frequencies. Detailed information about the
lineariser including configuration is contained
in section 7 of this instruction manual.
5.5 Input: inPut
The Input function contains two sub-functions
inP .tYPE and dEbounCE which configure the Rate
Totaliser input and input noise rejection.
5.6 Input type: inP .tYPE
inP .tYPE is a sub-menu in the inPut function which
defines the type of flowmeter or input pulse that the
Rate Totaliser will count. To check or change the
type of input, select inPut in the main configuration
menu and press (which will reveal the inP .tYPE
prompt, pressing (again will show the Rate
Totaliser input.If set as required press )twice to
return to the configuration menu, or repeatedly press
the &or *button until the required type of input is
displayed, then press )twicetoreturntothe
configuration menu.
One of following six types of input may be selected:
Switching
thresholds
Low High
oP,CoL Open collector 22 10k
VoLt5 L Voltage pulse low 113V
VoLt5 H Voltage pulse high13 10V
CoiL Magnetic pick-off 0 40mV
Pr .dEt Proximity detector 21.2 2.1mA
ContACt Switch contact 2100 1000
Notes:
1. Maximum voltage input +30V.
2. For flowmeter transducers that require
energising i.e. proximity detectors, switch
contacts or open collectors, terminals 3 & 4 of
the Rate Totaliser should be linked together.
3. To count correctly, the input pulse must fall
below the lower switching threshold and rise
above the higher switching threshold.
4. See section 5.7 for maximum counting
frequency.
13

14

15

5.7 Debounce: dEbouncE
dEbouncE is an adjustable sub-menu in the inPut
function which prevents the Rate Totaliser
miscounting when the input pulse has noisy edges,
such as those resulting from a mechanical contact
closing and bouncing. Three levels of protection
may be selected and the amount of debounce applied
depends upon the type of Rate Totaliser input that
has been selected in the inP .tYPE function.
The following table shows the minimum time that the
input pulse must be continuously above the upper
input switching threshold and continuously below the
lower switching threshold to ensure that the Rate
Totaliser processes the input pulse. Input switching
thresholds are shown in section 3.2.
De-bounce
level
Min input pulse width
Type of Input
Contact All others
Default 1600µs 40µs
Heavy 3200µs 350µs
Light 400µs 5µs
The Rate Totalier’s maximum counting frequency
depends upon the debounce level selected, the shape
of the input pulse and its amplitude. The following
table assumes a square wave input and is only for
guidance. The maximum counting frequency will be
lower if the input pulses have sloping edges and the
pulse amplitude only slightly exceeds the input
switching thresholds.
ONLY FOR GUIDANCE
De-bounce
level
Max counting frequency
Type of input
Contact All others
Default 250Hz 12kHz
Heavy 120Hz 2kHz
Light 1000Hz 100kHz
The minimum input frequency is 0.01Hz. Below this
frequency the rate display will be forced to zero.
The dEbouncE function is a sub-menu located in the
inPut function. Select inPut in the configuration
menu and press (which will reveal the inP .tYPE
prompt, press the &or *button to select dEbouncE
followed by (to reveal the existing setting.
Pressing the &or *button will scroll through the
three levels. When the required level has been
selected, pressing )twice will enter the selection
and return the display to the inPut prompt in the
configuration menu.
5.8 Display update interval: uPdAtE
If either the rate or the total display is likely to
change rapidly, a longer interval between display
updates may simplify reading the Rate Totaliser
display. This function allows one of six different
display intervals between 0.5 and 5 seconds to be
selected. The selected display update interval does
not affect the update time of any other instrument
function.
To adjust the update interval select uPdAtE from the
configuration menu and press (to reveal the
existing time. Pressing the &or *button will
scroll through the six times. When the required
interval has been selected press )to enter the
selection and return to the configuration menu.
5.9 Upper display: di5P-1
Usually total flow is shown on the larger upper eight
digit display, but this function allows rate to be
shown on the upper display and total on the smaller
lower display which can show six positive digits.
To check the status of the upper display, select
dI5P-1 from the configuration menu and press
(which will reveal if the display is showing rAtE or
totAL. The setting can be changed by pressing the
&or *button followed by the )button to enter
the selection and return to the configuration menu.
5.10 Lower display: di5P-2
This function turns the lower display on or off. When
turned off, the BA537E or the BA538E will only have
one eight digit display which may be configured in
the di5P-1 function to show total flow or rate of flow.
To check the status of the lower display, select
di5P-2 from the configuration menu and press (to
reveal if the lower display is on or oFF. The setting
may be changed by pressing the &or *button
followed by the )button to enter the selection and
return to the configuration menu.
16

5.11 Position of the decimal points: dP
The upper and lower displays have eight and six digits
respectively. This function enables the position of the
decimal point on both displays to be independently
positioned.
To adjust the position of the decimal points select dP
from the configuration menu and press (.The
upper display defined as the rate or total display by
function di5P-1 (section 5.9) will be activated and
identified by the display annunciator as Rate or Total.
The decimal point is positioned by operating the &or
*push button.
In the total display the &button moves the position
of the decimal point to the left and the *button
moves it to the right. It may be positioned between
any of the six right hand digits or absent by moving it
to the right of the least significant digit.
There are no restriction on the position of the decimal
point in the rate display.
When the decimal point in the upper display has been
positioned pressing the (button will transfer control
to the lower display variable, but it will be shown and
annunciated on the larger upper display. The position
of the decimal point may be positioned in the same
way by operating the &or *push buttons. When
set as required enter the settings and return to the
configuration menu by operating the )button.
5.12 Flowmeter K-factor: FACtor
The rate totaliser pulse input is divided by FACtor,
which is adjustable between 0 . 0001 and 99999,
for flow applications FACtor should be set to the K-
factor of the flowmeter. K-factor is the number of
pulses that the flowmeter produces per unit volume of
flow e.g. 20 pulses per litre, FACtor therefore
converts the flowmeter output into engineering units
ready for further scaling to produce the required rate
and total flow displays. See Fig 6.
When the 16 segment lineariser Lin is selected in
FunCtion up to 16 values of FACtor may be entered,
each at a specified input pulse frequency to
compensate for flowmeter non-linearity. See section
6 of this manual.
To check or change the value select FACtor from the
configuration menu and press (which will reveal the
existing value with one digit flashing.
The flashing digit may be adjusted by pressing the &
or *button. When this digit has been adjusted
pressing (will transfer control to the next digit.
When all the digits have been adjusted pressing
(will transfer control to the decimal point that may
be positioned between any of the digits, or may be
omitted by moving it to the right of the least significant
digit. When set as required, press )to return to the
FACtor prompt in the configuration menu.
5.13 Total scale factor: 5CALE .t
5CALE.t is a dividing factor adjustable between
0.0001 and 99999 that enables total flow to be
displayed in the required engineering units. e.g. if
the output from FACtor is one pulse per litre and the
total display is required in thousands of gallons,
5CALE . t should be set to 4546.1 which is the number
of litres in 1,000 imperial gallons. The total flow
display is independent of the rate display.
To check or change the total scale factor select
5CALE . t from the configuration menu and press (
which will reveal the existing value with one digit
flashing. The value of the flashing digit may be
changed by pressing the &or *button. When
this digit has been adjusted as required, pressing
(will transfer control to the next digit. When all
the digits have been adjusted pressing (will
transfer control to the decimal point that may be
positioned between any of the digits, or may be
omitted by moving it to the right of the least
significant digit. When the required total scale factor
has been entered, press )to return to the
5CALE .tprompt in the configuration menu.
5.14 Rate scale factor: 5CALE .r
5CALE . r is a dividing factor adjustable between
0.0001 and 99999 that enables the flow rate to be
displayed in the required engineering units. e.g. if
the output from FACtor is one pulse per litre and the
rate display is required in gallons, 5CALE . r should be
set to 4 . 5461 which is the number of litres in an
imperial gallon.
The units of the rate display are volume per unit of
time. The unit of time is the timebase of the
instrument which is determined by t-bA5E
described in section 5.15.
To check or change the rate scale factor select
5CALE . r from the configuration menu and press (
which will reveal the existing value with one digit
flashing. The value of the flashing digit may be
changed by pressing the &or *button. When
this digit has been adjusted as required, pressing
(will transfer control to the next digit. When all
the digits have been adjusted pressing (will
transfer control to the decimal point which may be
positioned between any of the digits, or may be
omitted by moving it to the right of the least
significant digit. When the required rate scale factor
has been entered, press )to return to the 5CALE . r
prompt in the configuration menu.
17

5.15 Timebase: t-bA5E
The timebase multiplies the rate display by 1, 60 or
3,600 depending upon whether the Rate Totaliser is
required to display rate per second, per minute or per
hour. See Fig 6.
To check or change the timebase, select t-bA5E from
the configuration menu and press (which will
reveal the existing setting. Pressing the &or *
button will scroll through the three options:
tb-1 for flow / second
tb-60 for flow / minute
tb-3600 for flow / hour
When the required multiplier is displayed press )to
return to the t-bA5E prompt in the configuration menu.
5.16 Display filter: FiLtEr
The digital display filter has two independent
adjustable parameters enabling the rate display
response to be tailored for optimum performance.
The filter parameters are controlled by a two digit
number. The first digit defines the amount of filtering
applied to the display as shown below.
First
digit
Filter time constant
seconds
0X 0
1X 1.3
2X 4.3
3X 6.5
4X 8.7
5X 11.3
6X 15.7
7X 20.9
8X 25.2
9X 31.5
The second digit defines the deviation from the
displayed rate at which the filter will be overridden and
the rate display will move rapidly to the new value.
Second
digit
Magnitude of step
change which will
produce a rapid
response
X0 off
X1 1%
X2 2%
X3 4%
X4 8%
X5 12%
X6 16%
X7 24%
X8 32%
X9 64%
By careful adjustment of the two parameters a stable
display with an acceptable input step response can
be obtained for most applications.
During commissioning it is recommend that initially
the second digit is set to 0(off) and the first digit is
adjusted to provide acceptable rate display stability.
The second digit should then be increased until the
selected step size is greater than the noise on the
display signal, at which setting the rate display will
become stable. These will be the optimum filter
parameters for acceptable rate display stability and
a fast response to a large rate signal change.
To check or change the filter select FiLtEr in the
configuration menu and press (which will reveal
the existing settings with the first digit flashing.
Pressing the &or *button will change the
flashing digit and (will transfer control to the
second digit. While making adjustments the filtered
rate display is shown on the lower display so that
stability can be assessed while adjustments are
being made. When set as required, press the )
button to enter the revised parameters and return to
the FiLtEr prompt in the configuration menu.
5.17 Clip-off: CLP oFF
To prevent totalisation of very low flow rates that
over long periods may result in significant
totalisation errors, the BA537E and the BA538E may
be configured to stop totalising when the flow rate
falls below an adjustable threshold.
To check or change the clip-off threshold select
CLP oFF from the configuration menu and press
(which will reveal the current setting. The
threshold is shown in the units already selected for
the flow rate display. One digit will be flashing. The
value of the flashing digit may be changed by
pressing the &or *button. When this digit is
correct pressing (will transfer control to the next
digit. When clip-off is set as required, press the )
button to enter the revised figure and return to the
CLP oFF prompt in the configuration menu.
When the flow rate falls below the clip-off threshold,
the rate display will show zero flow, totalisation will
stop and the HOLD annunciator will be activated.
The flow indicator will continue to rotate for 2
seconds each time an input pulse is received i.e. at
input pulse frequencies above 0.5Hz it will appear to
rotate continuously.
Note:
To avoid confusion, when the K-factor FACtor,
rate scale factor 5CALE . r, timebase t-bA5E,
or the position of the rate display decimal
point are changed, clip-off will automatically
be reset to zero. A new clip-off threshold
must therefore be entered after any of these
functions have been adjusted.
18

5.18 Local reset: LoC CLr
The Local reset function contains two sub-functions
Clr tot and Clr gtot which when enabled allow the
total display and grand total to be reset to zero via the
instrument push buttons while the Rate Totaliser is in
the totalisation mode.
5.19 Local total reset: Clr tot
Clr tot is a sub-menu in the LoC clr function which
when activated allows an operator to reset the total
display to zero while in the totalisation mode by
operating the &and *push buttons simultaneously
for more than two seconds.
Select loc clr in the configuration menu and press
(which will reveal the clr tot prompt and operate
(again which will show if the local total reset is on
or oFF. If set as required operate the )button twice
to return to the configuration menu, or the&or *
button to change the setting followed by the )button
twice to enter the change and return to the loc clr
prompt in the configuration menu.
Note:
The total display may also be reset to zero
remotely by connecting terminals RS1 and RS2
together for more than one second. See
section 3.3 of this manual.
5.20 Local grand total reset: clr gtot
The grand total is a separate sixteen digit counter
which is incremented in parallel with the total display,
but is not zeroed when the total display is reset to
zero. The grand total may be viewed in the
totalisation mode in two eight digit sections as
described in section 2.2 of this manual.
Clr gtot is a sub-menu in the loc clr function which
when activated allows the operator to reset the grand
total display to zero in the totalisation mode by
operating the )and *push buttons simultaneously
for more than ten seconds.
Select loc clr in the configuration menu and press
(which will reveal clr tot.Usingthe&or *
button to select clr gtot and press (which will
show if local grand total reset is on or oFF. If set as
required operate the )button twice to return to the
configuration menu, or the &or *button to change
the setting followed by the )button twice to enter
the change and return to the LoC .clr prompt in the
configuration menu.
5.21 Grand total reset from configuration
menu: Clr Gtot
The grand total is a separate sixteen digit counter
which is incremented in parallel with the total
display, but is not zeroed when the total display is
reset to zero. The grand total may be viewed in the
totalisation mode in two eight digit sections as
described in section 2.2 of this manual.
The grand total can be reset to zero from within the
configuration menu using this CLr.Gtot function, or
from the totalisation mode if sub-function clr gtotin
the loc clt function is activated - see 5.20.
To zero the grand total from within the configuration
menu select CLr Gtot and press (which will
cause the instrument to display Clr .no with no
flashing. Press the &or *push button until
Clr .YE5 is displayed and then press (which will
result in a 0000 prompt being displayed with the first
digit flashing. This is a request for the instruction to
be confirmed by entering 5urE using the &or *
buttons and the (button to move control to the
next digit. Pressing )will then reset the grand
total to zero and return the Rate Totaliser to the
configuration menu.
Note:
Once reset, the grand total can not be
recovered.
5.22 Security code: CodE
Access to the instrument 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 (which will cause
the Rate Totaliser to display 0000 with one digit
flashing. The flashing digit may be adjusted using
the &or *push buttons, when set as required
operating the (button will transfer control to the
next digit. When all the digits have been adjusted
press )to return to the CodE prompt. The revised
security code will be activated when the Rate
Totaliser is returned to the totalisation mode.
Please contact BEKA associates sales department if
the security code is lost.
19

5.23 Reset configuration to factory defaults
r5et def
This function resets the Rate Totaliser including the
lineariser, to the factory default configurations which
are shown in section 5.0
To reset the Rate Totaliser to the factory default
configurations select r5Et def from the configuration
menu and press (which will result in a 0000 display
with the first digit flashing. This is a request to confirm
the reset to factory default instruction by entering
5urE.Usingthe&or *button set the flashing digit
to 5and press (to transfer control to the second
digit which should be set to u. When 5urE has been
entered, pressing the )button will reset the BA537E
or BA538E to the factory defaults and return the
instrument to the totalising mode.
20