BEKA BA534D User manual

Issue: 10
18th September 2008
BA534D
Externally powered
pulse input
field mounting
rate totaliser
issue 10

2
1. Description
2. Operation
2.1 Initialisation
2.2 Controls
2.3 Displays
3. System Design
3.1 Flow transmitter loops
3.2 Power supply
3.3 Pulse input
3.4 Remote reset
4. Installation
4.1 Location
4.2 Installation procedure
4.3 EMC
5. Programming and Calibration
5.1 Calibration structure
5.2 Accessing programme functions
5.3 Summary of programmable
functions.
5.4 Display update interval
5.5 Type of input
5.6 Position of the decimal points
5.7 Lower display
5.8 Rate scale factor
5.9 Timebase
5.10 Rate filter
5.11 Total scale factor
5.12 Clip-off
5.13 Local reset
5.14 Resetting grand total
5.15 Security code
6. Calibration Example
6.1 Calibration procedure
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 Alarms
8.2.1 Solid state output
8.2.2 Programming and
adjustment
8.2.3 Alarm enable
8.2.4 Type of alarm
8.2.5 Setpoint adjustment
8.2.6 Alarm function
8.2.7 Alarm output status
8.2.8 Hysteresis
8.2.9 Alarm delay
8.2.10 Alarm silence time
8.2.11 Access setpoint
8.2.12 Adjusting alarm setpoints
from display mode.
8.3 Display backlight
8.4 Pulse output
8.5 4/20mA output
8.5.1 Programming & adjustment
8.6 External push-buttons
8.7 Pipe mounting kits
8.8 Stem mounting kit
9. Index
CONTENTS
The BA534D is CE marked to show compliance with the
European EMC Directive 2004/108/EC

3
1. DESCRIPTION
The BA534D is an externally powered pulse input
rate totaliser primarily intended for use with
flowmeters. The instrument simultaneously
displays the rate of flow and the total flow in
engineering units on two separate displays.
Housed in a robust IP66 glass reinforced
polyester (GRP) enclosure with an armoured
glass window, the BA534D is surface mounting or
may be pipe mounted using one of the accessory
kits. A stem mounting kit is also available allowing
direct mounting onto a flowmeter conduit entry.
2. OPERATION
Fig 1 shows a simplified block diagram of a
BA534D. The instrument has two sets of input
terminals allowing connection to high or low level
voltage pulses, switch contacts, an open collector
or to a two wire proximity detector. It may
therefore be used with almost any pulse output
flowmeter.
Independent programmable rate and total scaling
factors allow the two displays to be in the same or
in different engineering units. The total display
may be reset to zero via the internal push-buttons,
or an external switch contact.
Although the BA534D is fully programmable, an
optional user selectable security code prevents
tampering or accidental adjustments.
A wide range of accessories includes an isolated
pulse output which represent total flow, and an
isolated 4/20mA analogue output which is
proportional to the rate of flow. Optional alarms,
which may be programmed to function on the rate
or total displays, further extend the applications.
Fig 1 Simplified block diagram of BA534D
2.1 Initalisation
Each time power is applied to the instrument
initalisation is performed. After a short delay the
following display sequence occurs:
All segments of the display are activated for
about 2 seconds.
The product firmware part number and
version number are displayed for about 2
seconds.
Rate display and totaliser start to
function using calibration information
stored in the instrument's permanent
memory.
2.2 Controls
The BA534D is controlled and calibrated via four
push-button switches which are located behind
the instrument control cover, or as an option on
the outside of the instrument cover. In the
display mode i.e. when the instrument is
displaying rate and total flow the switch functions
are:
Description of Switch Functions
E+ Down While these buttons are pushed the
total display will show the least
significant eight digits of the grand
total, and the grand total annunciator
will be activated.
E+Up While these two buttons are pushed
the total display will show the most
significant eight digits of the grand total
and the grand total annunciator will be
activated.
Down Resets the total display to zero
+Up when these two push-buttons are
operated simultaneously for two
seconds.
Selectable function from programme
menu.
See section 5.12
Down While these buttons are pushed the
+P instrument will display firmware part
number and version number.
Note: When optional alarms are fitted, the
BA534D may be programmed to provide direct
access to the alarm setpoints from the display
mode when the P + Up push-buttons are operated
– see section 8.2

4
2.3 Displays
The BA534D has two digital displays and
associated annunciators, plus a flow indicator as
shown on page 1.
Rate Shows the flow rate on the
Display smaller six digit display.
Total Shows the total flow on the
display larger eight digit display. Set to
zero when local or remote reset
switch is operated.
Flow This disc in the lower left
indicator hand corner of the display
‘rotates’ for two seconds each
time an input pulse is received.
Therefore when the pulse input
frequency exceeds 0.5Hz the disc
appears to rotate continuously.
Hold Activated when the input
Annunciator frequency is below the clip-off
threshold.
Reset Activated when the total
Annunciator display is being reset.
3. SYSTEM DESIGN
3.1 Flow transmitter loops
The BA534D may be connected to almost any
pulse output flowmeter and calibrated to display
rate of flow and total flow in the same or different
engineering units.
Fig 2 illustrates the basic circuit that is used for all
BA534D installations. For simplicity, connections
for the optional pulse output, 4/20mA output and
backlight are included in section 8 of this manual.
Fig 2 BA534D in flow application
When designing a system it is important to
remember that terminals 2, 4, 6 and 8 are
interconnected within the BA534D - see Fig 1.
3.2 Power supply
The BA534D may be powered from any dc supply
having an output voltage between 10 and 30V.
The instrument consumes about 12mA rising to
15mA when a proximity detector input is used.

5
3.3 Pulse input
As shown in Fig 2, the BA534D will count pulses
from a wide variety of transducers enabling it to
display the output from almost any flowmeter.
The instrument has one pulse input, but two sets
of input terminals enable it to accommodate
different types of transducers. Terminals 5 and 6
are for pulse sources that need powering and
terminals 3 and 4 are for voltage pulse inputs.
Note: Only one pair of input terminals may be
used at a time. i.e pulses can not be counted
from terminals 3 & 4 and from terminals 5 & 6 at
the same time.
The following table shows the switching
thresholds for the various transducers, plus the
maximum operating frequency and the input
terminal numbers. For reliable counting the input
signal must fall below the lower threshold and rise
above the upper threshold.
Switching
thresholds Freq max Input terminals
Switch 100Ω1000Ω100Hz 5 & 6
Proximity
detector 1.2mA 2.1mA 5 kHz 5 & 6
Open
collector 2kΩ10kΩ5kHz 5 & 6
Magnetic
pick-off 0mV 20mV peak 5kHz 3 & 4
Voltage
pulse 1.0V 3.0V 5kHz 3 & 4
3.4 Remote reset
The BA534D total display is reset to zero when
terminals 7 & 8 are connected together for more
than one second. Permanent interconnection of
these terminals will stop totalisation and may be
used as an inhibit function. There is no practical
limit on the distance that the reset switch may be
from the totaliser.
Alternatively, the BA534D may be programmed so
that the total display is reset to zero when the Up
and Down push-buttons are operated
simultaneously for more than two seconds. – see
5.12
4. INSTALLATION
4.1 Location
The BA534D rate totaliser is housed in a robust
IP66 glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings. It is suitable for exterior
mounting in most industrial environments,
including off-shore and waste water treatment.
Please consult BEKA associates if high vibration
is anticipated.
The BA534D enclosure is surface mounting.
Accessory kits described in sections 8.7 & 8.8 of
this manual enable the instrument to be mounted
onto a vertical or horizontal pipe, or directly onto a
flowmeter conduit entry.
The field terminals and the two mounting holes
are located in a separate compartment with a
sealed cover allowing the instrument to be
installed without exposing the display assembly.
The BA534D earth terminal is connected to the
internal EMC filters. For maximum radio frequency
interference rejection this terminal should be
connected to a local earth, or to an earthed cable
screen.
The BA534D enclosure is supplied with a bonding
plate to ensure electrical continuity between the
three conduit / cable entries.
4.2 Installation Procedure
Fig 3 illustrates the instrument installation
procedure.
a. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b. Mount the instrument on a flat surface and
secure with two M6 screws through the 'B'
holes. Alternatively use one of the mounting
kits described in section 8.7 and 8.8
c. Remove the temporary dust seals from the
three cable entries and install the required
glands, conduit fittings or blanking plugs.
Note: The temporary dust seals fitted for
transit do not maintain the IP66 protection of
the BA534D enclosure.
d. Connect the field wiring to the terminals as
shown in Fig 4.
e. Replace the instrument terminal cover and
evenly tighten the two 'A' screws.

6
Fig 3 BA534D installation procedure
4.3 EMC
The BA534D complies with the requirements of
the European EMC Directive 2004/108/EEC. For
specified immunity all wiring should be in
screened twisted pairs and the BA534D earth
terminal should be locally earthed or connected to
an earthed cable screen.
To prevent circulating currents, cable screens
should only be earthed at one point.
Fig 4 Dimensions and terminal connections

7
5. PROGRAMMING & CALIBRATION
The BA534D is programmed and calibrated via
four push-buttons which are located behind the
instrument control cover. If frequent access to
the push-buttons is required, the rate totaliser can
be supplied with duplicate membrane push-
buttons mounted on the outside of the control
cover.
All the programming functions are contained in an
easy to use menu that is shown diagramatically in
Fig 6. Each function is summarised in section 5.3
which includes references to more detailed
information. Although this simple menu driven
system enables most adjustments to be made
without repeated reference to this manual, it is
recommended that at least the summary of the
programmable functions in section 5.3 is read
before attempting programming or recalibration.
When the BA534D is fitted with alarms, a pulse
output or a 4/20mA output, the basic menu is
expanded to include the accessories. Section 8
of this manual explains how to programme these
additional functions.
Note: While the instrument is being programmed
or calibrated, totalisation continues so that any
flow occurring during this time is recorded.
5.1 Calibration structure
Fig 5 shows the BA534D calibration structure.
The rate and total display calibration functions are
totally independent allowing the displays to have
different engineering units.
For the rate display the pulse input is divided by
SCALE-r to represent engineering units and
multiplied by the timebase t-bASE to calculate the
rate of flow per second, minute or per hour.
Similarly, to calculate the total flow in engineering
units the number of input pulses is divided by the
total scale factor SCALE-t. Total flow is
continuously added to the grand total.
The BA534D displays ‘real’ decimal points.
Moving the position of a decimal point in a scale
factor will therefore affect the instrument
calibration.
The BA534D updates its total flow calculation
twice per second. If the instrument is used for
batching applications, this resolution may define
the accuracy of the system.
Note: The total and rate displays may be updated
less frequently depending upon the display update
time selected.
Fig 5 Calibration structure
5.2 Accessing programming functions
Throughout this manual push-buttons are shown
in italics e.g. P or Up push-button, and legends
displayed by the instrument are shown within
inverted commas e.g. 'CAL' and ' ALr2'.
Access to the programme menu is obtained by
operating the Pand Epush-buttons
simultaneously. If the instrument is not protected
by a security code the first parameter 'UPdAtE' will
be displayed. If a security code other than the
default code 0000 has already been entered, the
instrument will display 'COdE'. Press Pto clear
this prompt and enter the security code for the
instrument using the Up or Down push-buttons to
adjust each digit, and the P push-button to move
control to the next digit. If the correct code has
been entered pressing Ewill cause the first
parameter 'UPdAtE' 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 display mode.
Apart from defining the position of the decimal
point in the rate display all programme functions
and prompts are shown on the large eight digit
display.
Once within the main programme menu the
required parameter can be reached by scrolling
through the menu using the Up or Down push-
buttons as shown by the programme structure in
Fig 6.

8

9
All new BA534D rate totalisers are supplied
calibrated as requested at the time of ordering. If
calibration information is not supplied, the
instrument will be conditioned for an open
collector input, with SCALE-r and SCALE-t set to
1 and a timebase of seconds.
5.3 Summary of programmable functions
This section summarises all the programmable
functions. When read in conjunction with Fig 6 it
provides a quick aid for programming the
instrument. If more detail is required, each
section contains a reference to a full description of
the function.
SUMMARY
Display Description of function
‘UpdAtE’ Display update time
Allows the interval between
display updates to be selected.
See section 5.4
'InPut' Type of input
Enables one of five types of input
to be selected:
UOLtS Voltage pulse
COIL Magnetic pick-off
Pr.dEt NAMUR proximity
detector.
COntACt Switch contact
OP.COL Open collector
See section 5.5
'd.P.' Decimal points
Defines the position of the decimal
point in both the rate and total
displays and enables the rate and
total displays to be interchanged.
See section 5.6
‘dISPLAY.2’ Lower display
Turns the lower display, which
normally shows rate, on or off.
See section 5.7
Display Description of function
'SCALE-r' Rate Scale Factor
Defines the arithmetic relationship
between the pulse input frequency
and the rate display. May be
adjusted between 0.001 and
99999999.
When used with a flowmeter,
SCALE-r should be set to the
flowmeter K factor (pulses per unit of
measurement) if the rate display is
required in the same flow units as the
K factor.
See section 5.8
't-bASE' Timebase
Selectable multiplier to display flow
rate in units per second, per minute
or per hour.
Select: tb-1 for flow / second
tb-60 for flow / minute
tb-3600 for flow / hour
See section 5.9
'FILtEr' Rate filter
Adjustable digital filter to reduce
noise on the rate display. Two
parameters each adjustable between
0 and 9.
See section 5.10
'SCALE-t' Total Scale Factor
Defines the arithmetic relationship
between the number of input pulses
and the total display.
May be adjusted between 0.001 and
99999999.
When used with a flowmeter SCALE-
t should be set to the flowmeter K
factor (pulses per unit of
measurement).
See section 5.11
'CLIP-OFF' Clip off
To prevent the totalisation of very low
flow rates, clip-off enables the user to
select a flow rate below which
totalisation is inhibited.
See section 5.12

10
Display Description of function
'LOC.rSEt'Local reset of total display
When turned 'On' the total display
may be reset to zero from the display
mode by simultaneously operating
the Up and Down push-buttons for
more than two seconds.
See section 5.13
'CLr. Gtot'Clear grand total
This function resets the grand total to
zero when 'CLr YES' is selected, and
'SurE' is entered to confirm the
instruction.
Note: Once cleared, a grand total
can not be recovered.
See section 5.14
'COdE' Security code
Defines a four digit numeric code
which must be entered to gain
access to the programmable
functions. Default code 0000
disables the security function and
allows unrestricted access to all
programmable functions.
See section 5.15
5.4 Display update interval: ‘UpdAtE’
Six different intervals between display updates
varying between 0.5 and 5 seconds may be
selected. If either the rate or the total displays
are likely to change rapidly, a longer interval
between updates may simplify reading the
instrument display. The selected update interval
does not affect the update time of any other
instrument function such as the optional 4/20mA
output.
To define the update interval select ‘UpdAtE’ from
the main menu and press Pto reveal the current
time. Pressing the Up or Down button will scroll
through the six times. When the required interval
has been selected press Eto return to the main
menu.
5.5 Type of input: ‘InPut’
The BA534D may be programmed to accept pulse
inputs from a wide variety of sensors. To define
an input type select ‘InPut’ from the menu and
press Pwhich will reveal the current input type.
Pressing Up or Down will scroll through the five
options:
‘UOLts’ Voltage pulse input
Threshold 1V and 3V
5kHz max.
Input terminals 3 and 4
‘COIL’ Low voltage pulse
Threshold 20mV peak
5kHz max.
Input terminals 3 and 4
‘Pr.dEt’ NAMUR proximity detector
Threshold 1.2 and 2.1mA
5kHz max.
Input terminals 5 and 6
‘COntACt’ Switch contact
Threshold 100 and 1000Ω
100Hz max
Input terminals 5 and 6
‘OP.COL’ Open collector
Threshold 2kΩand 10kΩ
5kHz max.
Input terminals 5 and 6
When the required type of input has been selected
press Eto return to the main menu.
Note: To count correctly, the input signal must fall
below the lower switching threshold and rise
above the higher switching threshold.
5.6 Position of the decimal points: ‘d.P.’
The rate display can have up to six digits and the
decimal point may be positioned between any of
them, or omitted. Similarly, the total display has up
to eight digits and the decimal point may be
positioned between any of them, or may be
omitted.
To adjust the position of either decimal point
select 'd.P.' from the main menu and press P. This
will activate both displays with one digit plus the
following decimal point of the total display
flashing. If only the least significant digit is
flashing, this indicates that the decimal point is
omitted.
The position of the decimal point can be moved by
pressing the Up or Down push-button. Operating
the P push-button will toggle control between the
two displays. When both decimal points have
been correctly positioned press Eto return to the
main menu.