BEKA BA334ND User manual

Issue: 13
25th March 2014
BA334ND
Type nL certified
externally powered
pulse input
field mounting
rate totaliser
Issue 13

2
1. Description
2. Operation
2.1 Initialisation
2.2 Controls
2.3 Displays
3. Type nL Certification
3.1 Certificate of Conformity
3.2 ATEX certification
3.3 Power supply
3.4 Pulse input terminals
3.5 Remote reset terminals
3.6 Zones, gas groups and T rating
3.7 Certification label information
4.System Design for Zone 2
4.1 Flow transmitter loop
4.2 Power supply
4.3 Pulse input
4.4 Remote reset
5. Installation
5.1 Location
5.2 Installation procedure
5.3 EMC
6. Programming and Calibration
6.1 Calibration structure
6.2 Accessing programme functions
6.3 Summary of programmable
functions.
6.4 Display update interval
6.5 Type of input
6.6 Position of the decimal points
6.7 Lower display
6.8 Rate scale factor
6.9 Timebase
6.10 Rate filter
6.11 Total scale factor
6.12 Clip-off
6.13 Local reset
6.14 Resetting grand total
6.15 Security code
7. Calibration Example
7.1 Calibration 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 Units of measurement and
instrument identification.
9.2 Alarms
9.2.1 Solid state output
9.2.2 Type nL certification
9.2.3 Programming and
adjustment
9.2.4 Alarm enable
9.2.5 Type of alarm
9.2.6 Setpoint adjustment
9.2.7 Alarm function
9.2.8 Alarm output status
9.2.9 Hysteresis
9.2.10 Alarm delay
9.2.11 Alarm silence time
9.2.12 Access setpoint
9.2.13 Adjusting alarm setpoints
from display mode.
9.3 Display backlight
9.4 Pulse output
9.5 4/20mA output
9.5.1 Programming & adjustment
9.6 External push-buttons
9.7 Pipe mounting kits
9.8 Stem mounting kit
10. Index
CONTENTS
The BA334ND is CE marked to show compliance with the
European Explosive Atmospheres Directive 94/9/EC
and the European EMC Directive 2004/108/EC

3
1. DESCRIPTION
The BA334ND is an Ex nL certified, 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.
The BA334ND complies with the European
ATEX Directive 94/9/EC for Group II, Category
3G equipment.
Housed in a robust IP66 glass reinforced
polyester (GRP) enclosure with an armoured
glass window, the BA334ND 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
BA334ND. The instrument accepts pulses
from a single source and after scaling displays
the total number of pulses received and their
rate on separate displays. When connected to
a pulse output flowmeter the BA334ND will
provide an accurate display of total flow and
the rate of flow.
The BA334ND has two sets of input terminals
for connection to high or low level voltage
pulses, a switch contact, an open collector
output or to a two wire proximity detector. The
instrument may therefore be used with almost
any type of pulse output flowmeter. The total
display may be reset to zero by a remote
switch contact, the internal switches or via the
optional keypad on the outside of the
instrument.
Optional accessories enable the flow rate to be
transmitted to other equipment as an isolated
4/20mA analogue signal and the total flow to
be transmitted as a pulse signal. Optional
alarms, which may be programmed to function
on the rate or total displays, further extend the
instrument’s applications.
Fig 1 Simplified block diagram of BA334ND
2.1 Initialisation
Each time power is applied to the instrument
initialisation is performed. After a short delay
the following display sequence occurs:
All segments of the display are activated
for 2 seconds.
The product firmware part number and
version number are displayed for 2
seconds.
Rate display and totaliser start to
function using calibration information
stored in the instrument's permanent
memory.
2.2 Controls
The BA334ND 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.

4
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 6.12
Down While these buttons are pushed the
+P instrument will display the firmware
part number and version number.
Note: When optional alarms are fitted the
push-buttons may be programmed to have
alternative functions – see section 9.2
2.3 Displays
The BA334ND has two digital displays and
associated annunciators, plus a flow indicator.
See illustration 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 input
Annunciator frequency is below the clip-off
threshold.
Reset Activated while instrument is
Annunciator being reset.
3. TYPE ‘nL’ CERTIFICATION
3.1 Certificate of Conformity
ITS Testing and Certification Ltd. (Formerly
ERA Technology Ltd) have issued a Certificate
of Conformity Ex01Y4014 confirming that the
BA334ND complies with the CENELEC
standard BS EN50021:1999.
The L suffix indicates that the Type n certified
equipment uses an energy limiting technique
based on the philosophy of intrinsic safety.
3.2 ATEX certification
The BA334ND complies with the European
ATEX Directive 94/9/EC for Group II, Category
3G equipment. It has been assessed using the
‘Internal Control of Production’ procedure
specified in Annex 8 of the Directive. A
technical dossier has been prepared and an
EC Declaration of Conformity
BEKA01ATEX0012 has been issued.
The instrument bears the Community Mark
and, subject to local codes of practice, may be
installed in any of the EU member countries,
i.e. Austria, Belgium, Denmark, Finland,
France, Germany, Greece Ireland, Italy,
Luxembourg, The Netherlands, Portugal,
Spain, Sweden and the United Kingdom.
ATEX certificates are also accepted in Norway,
Iceland, Liechtenstein and in Switzerland.
This manual describes installations that comply
with EN60079: Part 14 Electrical Installation in
Hazardous Areas. When designing systems
for installation outside the UK, the local Code
of Practice should be consulted.

5
3.3 Power supply
The BA334ND certificate specifies the
maximum input parameters for the power
supply terminals 7 and 8.
Ui = 30V dc
Ii = 100mA dc
When installed in Zone 2 the BA334ND must
be powered from a supply with an output
between 10 to 30V dc.
3.4 Pulse input terminals
The BA334ND rate totaliser has two alternative
pairs of input terminals enabling the instrument
to count pulses from a wide variety of sources.
Terminals 3 and 4 are for connection to voltage
pulse sources and terminals 5 and 6 to sources
requiring power such as switch contacts and
proximity detectors.
Note: Only one pair of input terminals may be
used at one time.
Maximum input parameters are:
Ui = 30V dc
Ii = 100mA dc
Input terminals 3 and 4 may therefore be
connected to any voltage source providing that
in normal operation it does not exceed the
specified input figures. This is not restrictive
and allows the BA334ND to be used with
almost any voltage source.
Terminals 5 and 6 are for connection to a
switch contact or a 2-wire NAMUR proximity
detector. These do not contain a source of
voltage and therefore there are no limits,
although if installed in Zone 2 the proximity
detector should be Type n approved.
3.5 Remote reset terminals
The BA334ND certificate specifies maximum
input parameters for the external reset
terminals 7 and 8:
Ui = 30V dc
Ii = 100mA dc
These terminals are intended for connection to
a switch contact in the safe or hazardous area,
so normally input parameters do not have to be
considered.
Note: The BA334ND may also 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.
3.6 Zones, gas groups and T rating
The BA334ND has been certified as Group II,
Category 3G apparatus as defined in the ATEX
Directive and as Ex nL T5, Tamb –40 to 60oC
to EN 60079-15.
‘L’ indicates that the BA334ND uses energy-
limiting techniques to achieve compliance as
defined in EN 60079-15. This technique is
based on the philosphy of intrinsic safety which
limits the current and voltage applied to
components which may generate a spark in
normal operation. e.g. switches and
potentiometers.
These approvals confirm that the BA334ND is
safe in normal operation and may be Installed in:
Zone 2 hazardous area
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1 450oC
T2 300oC
T3 200oC
T4 135oC
or T5 100oC
At an ambient temperature between
–20 and +60oC
This allows the BA334ND to be installed in
Zone 2 hazardous areas (low risk) and to be
used with most common industrial gases.
3.7 Certification Label Information
ATEX certification information is shown on a
label fitted in a recess on the top outer surface
of the enclosure. The instrument serial number
and date of manufacture are recorded on a
separate label inside the terminal
compartment.

6
4. SYSTEM DESIGN FOR ZONE 2
4.1 Flow transmitter loops
The BA334ND 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 BA334ND installations. For simplicity,
connections for the optional pulse output,
4/20mA output and backlight are included in
section 9 of this manual.
Fig 2 BA334ND in flow application
When designing a system it is important to
remember that terminals 2, 4, 6 and 8 are
interconnected within the BA334ND - see Fig
1. All wiring, transducers and the power
supply must be able to withstand a 500V rms
insulation test to earth for one minute. If the
system is to be connected to earth this should
only be done at one point within the safe area,
for example at the negative terminal of the
power supply. See EN60079-14 for guidance.
4.2 Power supply
The BA334ND 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.
To comply with the Ex nL certification
requirements, the power supply output must
not exceed 30V dc and 100mA dc in normal
operation.
4.3 Pulse input
As shown in Fig 2, the BA334ND 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 3 and 4 are for voltage pulse inputs
and terminals 5 and 6 are for pulse sources
that need powering such as switch contacts
and proximity detectors.
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 1001000100Hz 5 & 6
Proximity
detector 1.2mA 2.1mA 5 kHz 5 & 6
Open
collector 2k10k5kHz 5 & 6
Magnetic
pick-off 0mV 20mV peak 5kHz 3 & 4
Voltage
pulse 1.0V 3.0V 5kHz 3 & 4
To comply with the Ex nL certification
requirements, in normal operation the output
from the pulse tranducer must not exceed 30V
dc and 100mA dc.
4.4 Remote reset
The BA334ND 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 BA334ND 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 6.12

7
5. INSTALLATION
5.1 Location
The BA334ND 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 Zone 2
classified industrial environments, including off-
shore and waste water treatment. Please
consult BEKA associates if high vibration is
anticipated.
The BA334ND enclosure is surface mounting.
Accessory kits described in sections 9.7 & 9.8
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 BA334ND 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 a
cable screen which is earthed in the safe area.
The BA334ND enclosure is supplied with a
bonding plate to ensure electrical continuity
between the three conduit / cable entries.
5.2 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 9.7
and 9.8
c. Remove the temporary hole plug and
install an Ex n or Ex e cable gland or
conduit entry. If more than one entry is
required, replace one or both IP66
stopping plugs with an Ex n or Ex e
cable gland or conduit entry.
d. Connect the field wiring to the instrument
terminals as shown in Fig 4.
e. Replace the instrument terminal cover and
evenly tighten the two 'A' screws.
Fig 3 BA334ND installation procedure
5.3 EMC
The BA334ND complies with the requirements
of the European EMC Directive 2004/108/EC.
For specified immunity all wiring should be in
screened twisted pairs and the BA334ND earth
terminal should be locally earthed or connected
to a cable screen which is earthed in the safe
area.
To prevent circulating currents, cable screens
should only be earthed at one point in the safe
area.

8
Fig 4 Dimensions and terminal connections

9
6. PROGRAMMING & CALIBRATION
The BA334ND 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 6.3 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 6.3 is read
before attempting programming or
recalibration.
When the BA334ND is fitted with alarms, a
pulse or 4/20mA output, the basic menu is
expanded to include the option(s). Section 9
of this manual explains how to programme
these additional functions.
Note: While the instrument is being
programmed, totalisation continues so that any
flow occurring during this time is recorded.
6.1 Calibration structure
Fig 5 shows the BA334ND 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
and display the rate of flow per second, minute
or 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 BA334ND displays ‘real’ decimal points.
Moving the position of a decimal point in a
scale factor will therefore affect the instrument
calibration.
The BA334ND 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
6.2 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 and Down
push-buttons as shown by the programme
structure in Fig 6.

10

11
All new BA334ND 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 with a timebase of seconds.
6.3 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 6.4
'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 6.5
'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 6.6
‘dISPLAY.2’ Lower display
Turns lower display, which
normally shows rate, on or off.
See section 6.7
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 display is
required in the same units as the
K factor.
See section 6.8
'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 6.9
'FILtEr' Rate filter
Adjustable digital filter to reduce
noise on the rate display. Two
parameters each adjustable
between 0 and 9.
See section 6.10
'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) if the display is
required in the same units as the
K factor.
See section 6.11
'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 6.12

12
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 two seconds.
See section 6.13
'CLr. Gtot'Clears 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 6.14
'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 6.15
6.4 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.
6.5 Type of input: ‘InPut’
The BA334ND 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 1000
100Hz max
Input terminals 5 and 6
‘OP.COL’ Open collector
Threshold 2kand 10k
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.
6.6 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 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 E
to return to the main menu.
If the application requires flow rate to be the
primary display i.e. shown on the large display,
the d.P. function enables the rate and total
displays to be interchanged. The rate display
will continue to have six digits but the total
display will be reduced from eight to six digits.

13
The rate and total annunciators will also be
interchanged. Pressing the Up and Down
buttons simultaneously will interchange the
displays.
Note: Both decimal points must be
repositioned after the displays have been
interchanged.
6.7 Lower display: ‘dISPLAY.2’
This function turns the lower display on or off.
When turned off, the BA334ND will only have
one eight digit display which may be
programmed to show total flow or rate of flow.
6.8 Rate scale factor: ‘SCALE-r’
Together with the instrument timebase, this
function defines the arithmetic relationship
between the pulse input frequency and the rate
display. When used with a flowmeter SCALE-r
should be set to the K-factor of the flowmeter
i.e. the number of pulses the flowmeter
produces for a unit of flow. e.g. 45.6 pulses
per litre. See section 7 for a worked example.
SCALE-r is a dividing factor that may be
adjusted between 0.001 and 99999999.
To check or change the rate scale factor select
'SCALE-r' from the main menu and press Pto
reveal the existing setting, one digit will be
flashing. The value of the flashing digit can be
changed by pressing the Up or Down buttons.
When this digit is correct pressing Pwill
transfer control to the next digit.
To position the decimal point in the rate scale
factor, move the flashing digit to the left hand
side of the required decimal point position and
simultaneously press the Up and Down
buttons. When the required rate scale factor
has been entered, press E to store the number
and return to the main menu.
6.9 Timebase: ‘t-bASE’
The timebase multiplies the rate display by 1,
60 or 3,600 depending upon whether the
BA334ND is required to display rate per
second, per minute or per hour. See Fig 5.
To check or change the timebase, select
't-bASE' from the main menu and press P
which will reveal the current setting. Pressing
the Up or Down button will index through the
three options: tb-1 for flow / second
tb-60 for flow / minute
tb-3600 for flow / hour
Select the required multiplier and press Eto
return to the main menu.
6.10 Rate filter: ‘FILtEr’
This digital filter has two independent
adjustable parameters enabling the rate
display frequency response to be tailored for
optimum performance.
The filter parameters are controlled by a two
digit number. The first digit defines the amount
of filteringing 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 step input
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 again
become stable. These will be the optimum
filter parameters for acceptable rate display
stability and a fast response to a large rate
signal change.

14
To check or change the filter select 'FILtEr'
from the main menu and press Pto reveal the
current settings. Pressing the Up or Down
button will change the flashing digit and Pwill
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. When set as required, press the
Ebutton to enter the revised parameters and
return to the main menu.
6.11 Total scale factor: ‘SCALE-t’
This factor defines the arithmetic relationship
between the number of input pulses and the
total display. SCALE-t is a dividing factor that
may be adjusted between 0.001 and
99999999. See Fig 5.
When used with a flowmeter SCALE-t should
be set to the K-factor of the flowmeter i.e. the
number of pulses the flowmeter produces for a
unit of flow. If the BA334ND total display is
required in units different from those in which
the flowmeter K factor is specified, a
conversion factor will be required.
e.g. If the flowmeter has a K factor of 45.6
pulses per litre and the BA334ND total display
is required in units of 1,000 gallons, then
SCALE-t should be set to number of pulses
produced by the flowmeter per 1,000 gallons:
45.6 x 4.54609 x 1000
207,301.7 pulses per 1000 gallons
.
(there are 4.54609 litres in a UK gallon)
To check or change the total scale factor select
'SCALE-t' from the main menu and press Pto
reveal the existing setting, one digit will be
flashing. The value of the flashing digit can be
changed by pressing the Up or Down buttons.
When this digit is correct pressing Pwill
transfer control to the next digit.
To position the decimal point in the scaling
factor, move the flashing digit to the left hand
side of the required decimal point position and
simultaneously press the Up and Down
buttons.
When the required total scale factor has been
entered, press E to store the number and
return to the main menu.
6.12 Clip-off: ‘CLIP-OFF’
To prevent totalisation of very low flow rates
that over long periods may result in significant
totalisation errors, the BA334ND may be
programmed to stop totalising when the flow
rate falls below an adjustable threshold.
To check or change the clip-off threshold select
'CLIP-OFF' from the main menu and press P
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 Up or Down buttons.
When this digit is correct pressing Pwill
transfer control to the next digit. When clip-off
is set as required, press the E button to enter
the revised figure and return to the main
programme menu.
If the flow rate falls below the entered
threshold, the rate display will show zero flow,
totalisation will stop and the HOLD annunciator
will be activated. The flow indicator will rotate
for 2 seconds each time an input pulse is
received i.e. at input frequencies above
0.5Hz it will appear to rotate continuously.
Note: When the rate scale factor SCALE-r, the
timebase t-bASE, or the position of the rate
display decimal point are changed, clip-off will
automatically be reset to zero. If required, a
new clip-off threshold may then be entered.
6.13 Local reset of total display:
‘LOC. rSEt’
When activated this function enables the
operator to reset the BA334ND total display to
zero in the display mode by operating the Up
and Down push-buttons simultaneously for
more than two seconds. To check the status
of the local reset function select 'LOC.rSEt'
from the menu and press P which will reveal if
the function is 'On' or 'OFF'. If necessary
press the Up or Down button to change the
setting, followed by the E button to return to the
main menu.
The total display may also be reset to zero
remotely by connecting terminals 7 and 8
together. See section 3.5 of this manual.
6.14 Resetting grand total: ‘CLr. Gtot’
The grand total is a separate sixteen digit
counter which duplicates the total display but is
not zeroed when the total display is reset to
zero. The grand total may be viewed in the
display mode in two eight digit sections as
described in section 2.2 of this manual.
The grand total counter can only be reset to
zero from the 'CLr. Gtot' function in the main
programme menu. To zero the grand total

15
counter select 'CLr. Gtot' and press P which
will cause the instrument to display 'Clr. no'
with 'no' flashing. Continuously press the Up
or Down push-buttons until 'CLr. YES' is
displayed and then press Pwhich will result in
a 'CLr 0000' prompt with one digit flashing.
Using the Up and Down buttons and the P
button to move to the next digit, confirm the
request by entering the password 'SurE'. Note
'S' is entered as '5'. Pressing E will then reset
the grand total counter to zero and return the
instrument to the 'CLr. Gtot' prompt in the main
menu.
WARNING
After resetting the grand total
counter to zero the old grand
total can not be recovered.
6.15 Security code: ‘CodE’
The calibration and conditioning of the
instrument may be protected by a four digit
security code which must be entered before
access to the programme menu is granted.
New instruments are programmed with the
default security code 0000 which allows
unrestricted access to all programming
functions without entering a security code.
To enter a new security code select 'COdE'
from the menu and press P which will cause
the instrument to display the current security
code. Each digit of the code can be changed
using the Up and Down push-buttons, and the
Pbutton to move to the next digit. When the
required code has been entered press E to
return to the main menu. The revised security
code will be activated when the indicator is
returned to the display mode.
If the security code is lost, access to the
programmable functions can be obtained by
moving the internal security link to the override
position. The original security code can then
be viewed by selecting 'CodE' from the main
menu and pressing P.
To gain access to the security code link,
remove the instrument control cover by
undoing the two ‘C’ screws – see Fig 7. If the
instrument is fitted with external push-buttons
the connecting ribbon cable should be
unplugged from the outer row of the five pin
connector. The security code override link is
located on the inner row of the five pin
connector.
Fig 7 Location of security override link

16
7. CALIBRATION EXAMPLE
In this example a BA334ND rate totaliser is
connected to a turbine flowmeter having a K-
factor of 1050.0 pulses per litre. The
flowmeter has a magnetic pick-off with an
output greater than 20mV peak at 5 litres per
minute and a usable range of 5 to 60 litres per
minute.
The BA334ND is required to display rate of
flow in litres per hour with a resolution of one
litre and total flow in cubic metres with a
resolution of 0.01 cubic metres. Totalisation is
to stop when the flow rate falls below 300 litres
per hour. The display is to be updated twice
per second and filtering is required. In this
application the operator needs to reset the total
display to zero by simultaneously pushing the
Up and Down push-buttons. To prevent
tampering the instrument programme menu is
to be protected by security code 1209
7.1 Calibration procedure
The BA334ND rate totaliser may be calibrated
on-site without disconnection from the power
supply or from the flowmeter. When installed
in a Zone 2 hazardous area, calibration should
only be performed when there is no risk of a
flammable atmosphere being present and dust
and water can not enter the enclosure.
Step 1 Enter the programming mode
Put the BA334ND in the
programming mode by
simultaneously pressing P and E.
Assuming a security code has not
already been entered the
instrument will respond by
displaying 'UPdAtE' which is the
first function in the main menu.
See Fig 6.
Step 2 Select the interval between
display updates
With 'UPdAtE' displayed, press P
to reveal the existing interval
between display updates. If this is
not as required, press the Up or
Down button until ‘0.5’ is displayed.
(0.5 seconds i.e. 2 display updates
per second). Enter the revised time
and return to the 'UPdAtE' prompt
in the main menu by pressing E.
Step 3 Select the type of input
Using the Up or Down button scroll
through the main menu until ‘InPut’
is displayed, then press Pto reveal
the existing setting. Select ‘COIL’,
the input for a magnetic pick-off,
using the Up or Down button and
return to the 'InPut' prompt in the
main menu by pressing E.
Note: The BA334ND has two pairs
of input terminals. 3 & 4 for voltage
inputs and 5 & 6 for switch contact,
proximity detector or open collector
inputs. Ensure that the magnetic
pick-off that has a voltage output is
connected to terminals 3 & 4.
Step 4 Position rate & total decimal
points
Select ‘d.P.’ from the main menu
and press P. The rate and total
displays will be activated with one
digit of the total display flashing.
Press the Up or Down push-button
until the third least significant digit
of the total display and following
decimal point are flashing. This
gives the required total display
resolution of 0.01
Press Pto move control to the rate
display. Using the Up or Down
push-button move the flashing digit
to the least significant position (right
hand side) which will result in no
decimal point being displayed.
Finally press Eto return to the 'd.P’.
prompt in the main menu.
Step 5 Enter the rate scaling factor
Select ‘SCALE-r’ from the main
menu and press Pto show the
current figure. The K factor of the
flowmeter in this example is
1050.0* pulses per litre which
should be entered as the rate
scaling factor.
Firstly to position the decimal point,
operate the Ppush-button to move
the flashing digit to second least
significant position. Pressing the
Up and Down buttons
simultaneously will then position the
decimal point in front of the least
significant digit.
Using the Up and Down buttons to
adjust each digit in turn and the P
button to transfer control between
digits, enter 1050.0 Finally return
to the 'SCALE-r' prompt in the main
menu by pressing E.
* Could also be entered as 1050

17
Step 6 Enter the rate timebase
Select ‘t-bASE’ from the main menu
and press Pto show the current
setting. In this example the rate
display is required in litres per hour.
Using the Up or Down button scroll
through the three options and
select ‘tb-3600’ which will multiply
the rate display by 3600. Return to
the ‘t-bASE’ prompt in the main
menu by pressing E.
Step 7 Adjust the rate filter
The rate display filter parameters
should be adjusted experimentally
after installation to provide a stable
rate display.
During commissioning it is
recommend that initially the second
digit of the rate filter parameters is
set to 0 (step response off) and the
first digit (amount of filtering) is
adjusted to provide acceptable rate
display stability. The second digit
should them be increased until
acceptable rate display stability is
once again achieved.
To adjust the filter parameters
select ‘FILtEr’ from the main menu
and press Pto reveal the current
setting. The first digit will be
flashing and may be adjusted using
the Up or Down button. The P
button will transfer control to the
second digit. When both are set as
required, return to the ‘FILtEr’
prompt in the main menu by
pressing E.
Note: While adjusting the filter, the rate is
shown on the lower display so that
stability can be assessed.
Step 8 Enter the total scaling factor
The K factor of the flowmeter in this
example is 1050.0 pulses per litre
and the total display is required in
cubic metres.
There are 1000 litres in a cubic
metre so the BA334ND is required
to display 1 cubic metre for every
1,050 x 1,000 pulses received.
‘SCALE-t’ should therefore be set
to 1,050,000
Select ‘SCALE-t’ from the main
menu and press Pwhich will reveal
the current setting with one digit
flashing. To position the decimal
point, operate the Ppush-button to
move the flashing digit to the least
significant position. Pressing the
Up and Down buttons
simultaneously will then remove the
decimal point.
Using the Up and Down buttons to
adjust each digit in turn and the P
button to transfer control between
digits, enter 1050000 Finally
return to the 'SCALE-t' prompt in
the main menu by pressing E.
Step 9 Define clip-off
In this example totalisation is to be
inhibited at flow rates below 300
litres per hour.
Select ‘CLIP-OFF’ from the main
menu and press Pwhich will reveal
the clip-off threshold in litres per
hour i.e. the same units already
selected for the rate display. The
most significant digit of the display
will be flashing, indicating that this
digit may be adjusted. Pressing P
five times will move the flashing
digit to the third lease significant
digit.
Using the Up and Down buttons set
the third least significant digit to 3
i.e. a clip-off threshold of 300.
Finally return to the 'CLIP-OFF'
prompt in the main menu by
pressing E.
.
Step 10 Turn local reset on
In this example the operator needs
to reset the total display to zero by
pressing the Up and Down buttons
simultaneously. To activate the
local reset function select
‘LOC.rSEt’ from the main menu and
press Pto display the current
setting. Pressing the Up or Down
button will toggle the display
between ‘On’ and ‘OFF’. Select
‘On’ and press Eto return to the
‘LOCrSEt’ prompt in the main
menu.

18
Step 11 Reset the grand total to zero
Before completing commissioning
the grand total counter should be
reset to zero. Select 'CLr. Gtot'
from the main menu and press P
which will cause the instrument to
display 'Clr. no'. Toggle this to
'CLr. YES' using the Up or Down
push-buttons and press Pwhich will
result in a '0000' prompt. Using the
Up, and Down buttons and the P
button to move to the next digit,
confirm the request by entering the
password 'SurE'. Note: S is entered
as 5. Pressing E will then reset
the grand total counter to zero and
return the instrument to the 'CLr.
Gtot' prompt in the main menu.
Step 12 Define the security code
Defining a security code prevents
unauthorised access to the
programme functions. Select
'COdE' from the main menu and
press Pwhich will reveal the
existing security code. Using the
Up and Down buttons enter the
new code 1209 digit by digit. The P
button will transfer control between
digits. When the new code has
been entered, press Eto return to
the main programme menu.
Step 13 Return to the display mode
Following completion of
programming and calibration, return
the BA334ND to the operating
mode by pressing E. All the
programming functions will now be
stored in permanent memory and
will be protected by the security
code from accidental or
unauthorised adjustment.

19
8. MAINTENANCE
8.1 Fault finding during commissioning
If a BA334ND fails to function during
commissioning the following procedure should
be followed:
Symptom Cause Check:
No display Incorrect
wiring
Note:
Terminals 2, 4,
6 & 8 are
interconnected
within the
BA334ND
That there is
between 10 and
30V on terminals
1 & 2 with terminal
1 positive.
Flow indicator
not rotating No input pulses,
incorrect input
terminals
used, or
incorrect type
of input
selected
That BA334ND
has been
calibrated for the
correct input.
That input signal is
connected to
correct input
terminals and
correctly polarised.
Flow indicator
rotating but
incorrect rate
display
Incorrect
calibration
Input below
clip-off
threshold
That rate scale
factor and
timebase are
correctly
programmed.
That clip-off
threshold is set
correctly.
Unstable rate
display Noisy pulse input signal Source of noise and try to eliminate
or increase rate
filter.
Correct rate
display but
incorrect total
display
Incorrect
calibration
Remote reset
switch
contacts
closed
That total scale
factor is correctly
programmed.
That ‘RESET’
annunciator is not
activated. If it is,
check reset wiring
and switch.
Unable to
enter
programme
mode
Incorrect
security code That the correct security code is
being used, or fit
security link in
override position.
See Fig 7.
Clip-off does
not function
and 4/20mA
output is
constantly
3.5mA
Clip-off &
4/20mA have
been
automatically
reset to zero
following
change of rate
display
calibration
Re-enter required
clip-off and
4/20mA output
calibration.
Alarms do not
function Alarms have been disabled
following
calibration
change
Re-enable both
alarms.
8.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
Live maintenance should only be
performed when there is no risk of a
flammable atmosphere being present
and dust and water can not enter the
enclosure. Before replacing control
and terminal covers ensure that the
sealing gaskets are undamaged and
are free from foreign bodies.
If a BA334ND fails after it has been functioning
correctly, the following table may help to
identify the cause of the failure.
Symptom Cause Check:
No display No power
supply. That there is between 10 and
30V on terminals 1
& 2.
Flow indicator
not rotating No input pulses Output from flowmeter.
Wiring between
flowmeter and
BA334ND.
Flow indicator
rotating, but
rate display
indicates zero
and there is
no totalisation
Input below
clip-off
threshold
Clip-off threshold
and if necessary
adjust.
Unstable rate
display Noisy pulse input signal Source of noise and try to
eliminate, or
increase rate filter.
If this procedure does not reveal the cause of
the fault, it is recommended that the instrument
is replaced.
8.3 Servicing
We recommend that faulty BA334ND rate
totalisers are returned to BEKA associates or
to our local agent for repair.
8.4 Routine maintenance
The mechanical and electrical condition of the
instrument should be regularly checked.
Initially annual inspections are recommended,
but the inspection frequency should be
adjusted to suit the environmental conditions.
8.5 Guarantee
Instruments which fail within the guarantee
period should be returned to BEKA associates
or our local agent. It is helpful if a brief
description of the fault symptoms is provided.

20
8.6 Customer comments
BEKA associates is always pleased to receive
comments from customers about our products
and services. All communications are
acknowledged and whenever possible,
suggestions are implemented.