BEKA BA334G User manual

Issue: 1
7th February 2017
BA334G & BA334E
Intrinsically Safe
Externally powered
Rate Totaliser
Issue 1

2
1. Description
2. Operation
2.1 Initialisation
2.2 Controls
2.3 Displays
2.4 Display over-range
3. Intrinsic safety certification
3.1 ATEX gas certification
3.2 Zones, gas groups & T rating
3.3 Power supply
3.4 Pulse input terminals
3.4.1 Sensors not requiring energising
3.4.2 Sensors requiring energising
3.5 Remote reset terminals
3.6 Certification label informnation
4. System design for gas hazardous areas
4.1 Use with Zener barriers
4.1.1 Power supply
4.1.2 Pulse input
4.1.3 Switch contact input
4.1.4 Open collector input
4.1.5 2-wire proximity detector input
4.1.6 Magnetic pick-off input
4.1.7 Voltage pulse input
4.1.8 Remote reset
4.2 Use with galvanic isolators
4.2.1 Power supply
4.2.2 Pulse input
4.2.3 Switch contact input
4.2.4 Open collector input
4.2.5 2-wire proximity detector input
4.2.6 Magnetic pick-off input
4.2.7 Voltage pulse input
4.2.8 Remote reset
5. Installation
5.1 Location
5.2 Installation procedure
5.3 EMC
5.4 Units of measurement and tag marking
on scale card.
6. Configuration and Calibration
6.1 Configuration structure
6.2 Accessing configuration functions
6.3 Summary of configuration functions
6.4 Rate totaliser function: function
6.5 Input: input
6.6 Input type: inp .type
6.7 Debounce: debounce
6.8 Display update interval: update
6.9 Upper display: di5p-1
6.10 Lower display: di5p-2
6.11 Position of decimal points: dp
6.12 Flowmeter K-factor: factor
6.13 Total scale factor: 5cale .t
6.14 Rate scale factor: 5cale .r
6.15 Timebase: t-ba5e
6.16 Display filter: filter
6.17 Clip-off: clp off
6.18 Local reset: loc clr
6.19 Local total reset: clr tot
6.20 Local grand total reset: clr gtot
6.21 Grand total reset from configuration
menu: clr gtot
6.22 Security code: code
6.23 Reset to factory defaults: r5et def
6.24 Pulse output
6.24.1 Intrinsic safety
6.24.2 System design
6.24.3 Configuration
6.24.4 Pulse output
6.24.5 Enable pulse output
6.24.6 Source of output pulse
6.24.7 Divide output pulse frequency
6.24.8 Output pulse width
6.24.9 Pulse storage
7. Lineariser
7.1 Flowmeter specification
7.2 Summary of lineariser configuration
functions.
7.3 Add a segment: add
7.4 Remove a segment: del
7.5 Input frequency: pul5efre
7.6 Flowmeter K-factors: l-factor
7.7 Lineariser error messages
8. Configuration example
8.1 Configuration procedure
CONTENTS
The BA334G and BA334E are CE marked to show compliance with the European Explosive
Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU

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9. Maintenance
9.1 Fault finding during commissioning
9.2 Fault finding after commissioning
9.3 Servicing
9.4 Routine maintenance
9.5 Guarantee
9.6 Customer comments
10. Accessories
10.1 Units of measurement and
instrument identification.
10.2 Backlight
10.3 Alarms
10.3.1 Solid state output
10.3.2 Intrinsic safety
10.3.3 Configuration and adjustment
10.3.4 Alarm enable: enbl
10.3.5 Type of alarm: type
10.3.6 Setpoint adjustment: 5p1x and 5p2x
10.3.7 Alarm function: hi.lo
10.3.8 Alarm output status: no.nc
10.3.9 Hysteresis: h5tr
10.3.10 Alarm delay: dela
10.3.11 Alarm silence time: 5il
10.3.12 Flash display: fl5h
10.3.13 Access setpoint: ac5p
10.3.14 Adjusting alarm setpoints
from totalisation mode:
10.4 4/20mA output
10.4.1 Intrinsic safety
10.4.2 System design
10.4.3 Configuration
10.4.4 Enable 4/20mA output: enbl
10.4.5 Select rate or total source
: 4-20type
10.4.6 Display for 4mA output: 4.000
10.4.7 Display for 20mA output: 20 .000
Appendix 1 ATEX dust certification
Appendix 2 IECEx gas and dust certification
Appendix 3 ETL & cETL gas and dust
certification.
Appendix 4 BA334E Rate Totaliser

4
1. DESCRIPTION
These intrinsically safe, one input rate totalisers are
primarily intended for use with a pulse output
flowmeter. The BA334G and the BA334E are
functionally identical and have similar certifications,
but differ in mechanical construction and options.
The differences are summarised in the following
table.
BA334G BA334E
Separate terminal
compartment.
No Yes
Pulse output Yes Yes
Backlight Option Yes
4/20mA output. Option Yes
Dual alarms Option Yes
Certification
IECEx Gas & dust Gas
ATEX Gas & dust Gas
ETL & cETL Gas & dust Gas & dust
The main sections of this instruction manual
describe the BA334G, but also apply to the BA334E.
Details of the BA334E mounting and terminals are
contained in Appendix 4.
The BA334G and BA334E have been ATEX certified
intrinsically safe by Notified Body Intertek Testing
and Certification Ltd and comply with the European
ATEX Directive 2014/34/EU. The BA334G has gas
and dust certification, but the BA334E only has
ATEX gas certification.
The main sections of this manual describe ATEX
gas certification.
For international applications the BA334G and
BA334E also have IECEx certification which is
described in Appendix 2. The BA334E does not
have IECEx dust certification.
For applications in the USA and Canada the
BA334G and BA334E have ETL & cETL certification
which is described in Appendix 3.
The BA334G and BA334E simultaneously display
the rate of flow and the total flow in the same or
different engineering units. The instruments 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.
2. OPERATION
Fig 1 shows a simplified block diagram of the
BA334G Rate Totaliser. The instrument can
accept pulses from most flowmeter transducers.
When connected to a pulse output flowmeter the
BA334G 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 BA334G has a single pair of input terminals
for connection to all types of sensor. When
counting pulses from a sensor 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.
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.
Fig 1 BA334G block diagram

5
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.
2.2 Controls
The BA334G is 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 )
and *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 6.20
&+ * If Local Total Reset CLr tot in the
instrument configuration menu has
been activated, operating the &and
*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 6.19
(+ &Shows in succession, firmware
version number, instrument function
totali5e and any output accessories
that are fitted:
- A Dual alarm outputs
- P Pulse output
(always fitted)
- 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 10.3.13
(+ )Access to configuration menu

6
2.3 Displays
The BA334G has two digital displays and
associated annunciators, plus a flow indicator as
shown on front cover.
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
2.4 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.
3. INTRINSIC SAFETY CERTIFICATION
The BA334G has ATEX and IECEx gas and dust
certification. This section of the instruction manual
describes ATEX gas certification. ATEX dust and
IECEx approvals are described in Appendixes 1
and 2.
3.1 ATEX gas certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA334G with an EU-Type
Examination Certificate number
ITS16ATEX28408X. This confirms compliance
with harmonised European standards and it has
been used to confirm compliance with the
European ATEX Directive for Group II,
Category 1G equipment, Ex ia IIC T5 Ga
equipment. The Rate Totaliser carries the
community mark and, subject to local codes of
practice, may be installed in any of the European
Economic Area (EEA) member countries. ATEX
certificates are also acceptable for installations in
Switzerland.
This section of the instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN 60079-14 Electrical
installations design, selection and erection. When
designing systems for installation outside the UK
the local Code of Practice should be consulted.
3.2 Zones, gas groups and T rating
The BA334G Rate Totaliser has been certified
Ex ia IIC T5 Ga. When connected to a suitable
system it may be installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture likely
to occur in normal operation.
Zone 2 explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
In gases that may be used with equipment having
a temperature classification of:
T1 450°C
T2 300°C
T3 200°C
T4 135°C
T5 100°C
At ambient temperatures between -40 and +70°C.

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CAUTION installation in Zone 0
When installed in a Zone 0 potentially explosive
atmosphere requiring EPL Ga apparatus, the
instrument shall be installed such that even in
the event of rare incidents, an ignition source
due to impact or friction between the aluminium
label and iron/steel is excluded.
No special conditions apply when the BA334G Rate
Totaliser is installed in Zone 1 or in Zone 2. This
allows the BA334G to be installed in all gas Zones
and to be used with most common industrial gases
except carbon disulphide and ethyl nitrite which
have an ignition temperature of 95°C.
3.3 Power supply
When installed in a hazardous area the BA334G
should be powered from a certified Zener barrier,
galvanic isolator or associated apparatus with an
intrinsically safe voltage output.
The safety parameters of terminals 1 and 2 are:
Ui = 28V dc
Ii = 200mA dc
Pi = 0.84W
Uo = 0
Io = 0
Any certified Zener barrier, galvanic isolator or
associated apparatus with output safety parameters
equal to or less than these input limits may be used.
The maximum equivalent capacitance and
inductance between terminals 1 and 2 is:
Ci = 2nF
Li = 4µH
To determine the maximum permissible cable
parameters the above figures, which are small and
may be ignored in some applications, should be
subtracted from the maximum permitted cable
parameters specified for the Zener barrier, galvanic
isolator or associated apparatus powering the
BA334G Rate Totaliser.
3.4 Pulse input terminals
The BA334G Rate Totaliser has a single pair of
pulse input terminals 5 and 6 that may be
configured for use with different types of flowmeter.
For flowmeters with transducers that require
energising to determine their state, such as switch
contacts or a 2-wire proximity detector in a turbine
flowmeter, an external link between terminals 3 & 4
of the BA334G connects an internal 7V, 6mA
supply to the input. Energising is not required
when the Rate Totaliser's input is connected to a
voltage pulse source.
Fitting an external link between terminals 3 & 4
changes the output safety parameters of the Rate
Totaliser input terminals 5 & 6 as shown in the
following table. This table also shows the types of
sensor requiring energising (link fitting).
Output safety parameters
Type of input Link 3 & 4 Uo Io Po
Switch contact Yes 10.5V 9.2mA
24mW
Proximity detector Yes 10.5V 9.2mA
24mW
Open collector Yes 10.5V 9.2mA
24mW
Magnetic pick-off No 1.1V 0.5mA
0.2mW
Voltage input (low) No 1.1V 0.5mA
0.2mW
Voltage input (high) No 1.1V 0.5mA
0.2mW
3.4.1 Flowmeter sensors not require energising
Flowmeters employing magnetic pick-offs or
voltage pulse sensors do not require energising,
therefore terminals 3 & 4 should not be linked.
When not energised i.e. without a link, the output
parameters of the pulse input terminals comply
with the requirements for simple apparatus. For
intrinsic safety purposes, sources of energy with
output parameters less than 1.5V; 100mA and
25mW are considered to be simple apparatus
(Clause 5.7 of EN60079-11), which allows their
output parameters Uo, Io & Po to be ignored when
assessing the safety of an intrinsically safe system,
thus simplifying loop assessment and
documentation.
Almost any flowmeter with a voltage pulse output
may be directly connected to the BA334G input in
a hazardous area providing that:
a. The flowmeter is a certified intrinsically safe
device having output parameters equal to or
less than:
Uo 28V dc
Io 200mA dc
Po 0.84W
or complies with requirements for
simple apparatus.

8
b. The flowmeter and associated wiring can
withstand a 500V rms insulation test to earth.
c. The flowmeter is located in the same
hazardous area as the BA334G. The BA334G
EU-Type Examination Certificate specifies that
the equivalent capacitance and inductance of
pulse input is:
Ci = 2nF
Li = 4µH
To determine the maximum permissible cable
parameters these figures should be subtracted from
the maximum permitted output parameters Lo and
Co specified by the certificate for the flowmeter
connected to the totaliser's pulse input terminals.
The totalisers pulse input equivalent capacitance
and inductance are small and unlikely to make a
significant difference to the allowable cable
parameters.
3.4.2 Flowmeter sensors requiring energising
Flowmeters with switch contacts, proximity detector
or open collector outputs require energising which is
achieved by linking Rate Totaliser terminals 3 and 4
together as described in section 3.4. When
energised, the output parameters of the pulse input
terminals 5 and 6 are:
Uo = 10.5V dc
Io = 9.2mA dc
Po = 24mW
These output parameters do not comply with the
requirements for simple apparatus and should be
considered when assessing the safety of the
flowmeter connected to the totaliser pulse input.
Any certified intrinsically safe flowmeter may be
connected to a BA334G energised input providing
that:
a. The flowmeter is a certified intrinsically safe
device having input parameters equal to or
greater than:
Uo 10.5V dc
Io 9.2mA dc
Po 24mW
or complies with the requirements for
simple apparatus.
b. The flowmeter and associated wiring can
withstand a 500V rms insulation test to earth.
c. The flowmeter is located in the same
hazardous area as the BA334G.
d. Minimum operating voltage of a flowmeter
incorporating a proximity detector is less than
7.5V.
e. The maximum capacitance and inductance
that may be safely connected to the
energised pulse input terminals 5 & 6
(terminals 3 & 4 linked) is:
Co = 2.4µF
Lo = 200mH
This is not restrictive as the combined capacitance
and inductance of most sensors and the
connecting cable will be less than this.
3.5 Remote reset terminals
The BA334G total display may be reset to zero by
connecting the external reset terminals RS1 and
RS2 together for more than one second. The two
reset terminals have the following input and output
safety parameters:
Uo = 3.8V dc
Io = 1mA
Po = 1mW
Ui = 28V dc
Ii = 200mA dc
Pi = 0.84W
The equivalent capacitance and inductance
between them is:
Ci = 0
Li = 0
The maximum cable capacitance and inductance
that may be safely connected between the reset
terminals RS1 and RS2 is:
Co = 40µF
Lo = 1H
The reset terminals may be directly connected to
any mechanically operated switch located within
the same hazardous area as the BA334G Rate
Totaliser. The switch and associated wiring should
be able to withstand a 500V rms insulation test to
earth.

9
If the reset switch is required in the safe area a
Zener barrier or intrinsically safe relay is required to
transfer the contact closure into the hazardous area.
Almost any intrinsically safe relay with certification
permitting the contacts to be connected to
equipment in the hazardous area may be used.
A diode return Zener barrier is not suitable for this
application.
Alternatively the BA334G may be configured so that
the total display is reset to zero when the &and
* push buttons are operated simultaneously for
more than three seconds. See 6.19
3.6 Certification label information
The Rate Totaliser certification information label is
fitted in a recess on the top outer surface of the
enclosure. It shows the ATEX and IECEx
certification information plus BEKA associates
name, location, year of manufacture and the
instrument serial number. Non European
certification information may also be included.
BA334G Certification information label
4. SYSTEM DESIGN FOR GAS HAZARDOUS
AREAS.
4.1 Use with Zener barriers
Zener barriers are the least expensive intrinsically
safe interface between a safe and hazardous area.
However they require a high integrity earth
connection that may be expensive to install and
they do not provide isolation. When a high integrity
earth connection is not already available, it may be
less expensive and complicated to use galvanic
isolators for the installation of a single BA334G.
Terminals 2, 6 and RS2 of the BA334G Rate
Totaliser are internally connected together. If any
of these terminals are earthed, as shown in Figs 2
& 3, the other common terminals should only be
connected to the same earth, i.e. the barrier
busbar, or to circuits that have 500V rms insulation
to earth.
Any Zener barrier may be used with the BA334G
providing it's certification is for use with apparatus
in the required Zone and gas group, and it's output
parameters do not exceed the input parameters of
the Rate Totaliser terminals to which it is
connected. Only one polarity of Zener barrier i.e.
positive or negative, may be used in a Rate
To t a li s e r s y s t e m.
Fig 2 illustrates the basic circuit that is used for all
BA334G installations protected by Zener barriers.
For simplicity, connections for the pulse output and
optional alarms and 4/20mA output are shown
separately in sections 6.24 and 10 of this manual.
Fig 2 BA334G used with Zener barriers

10
Alternatively the pulse source may be located in the
safe area. Fig 3 shows how an additional Zener
barrier is used to transfer the signal to the rate
totaliser in the hazardous area. When more than
one Zener barrier is used in a system all must have
the same polarity, i.e. all positive or all negative
barriers.
When designing a system it is important to
remember that terminals 2, 6 and RS2 are
interconnected within the BA334G See Fig 1.
Fig 3 BA334G used with Zener barriers pulse
source in the safe area.
4.1.1 Power supply
The BA334G Rate Totaliser requires a minimum of
10V between terminal 1 & 2 and consume:
10mA without optional backlight
plus 6mA when terminals 3 & 4 are linked
Any certified Zener barrier may be used to power a
BA334G Rate Totaliser providing the output safety
parameters of the barrier are equal to or less than
the input safety parameters of terminals 1 & 2 of the
Rate Totaliser.
Although this allows a wide variety of barriers to be
used, a positive polarity 28V; 93mA; 300Zener
barrier, which has an end-to-end resistance of
about 340, is an industry standard device which
is frequently used. With this barrier the supply
voltage in the safe area must be between 15.5V
and the maximum working voltage of the Zener
barrier which, depending upon manufacturer, will
be approximately 26V.
Note: The optional factory fitted display backlight
increases the instrument's current
consumption to 32mA and therefore
increases the minimum safe area
operating voltage, see section 10.2 for
details.
4.1.2 Pulse input
As shown in Figs 2 and 3 the BA334G can display
the rate and total flow from flowmeters with a wide
variety of pulse outputs located in safe and
hazardous areas.
No Zener barrier is required in series with the input
if the intrinsically safe flowmeter is located within
the same hazardous area as the Rate Totaliser.
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 0 40mV peak
Proximity
detector
1.2mA 2.1mA
Switch 1001000
Flowmeters with a switch contact, proximity
detector or an open collector output require
energising which is achieved by linking Rate
Totaliser terminals 3 and 4.

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4.1.3 Switch contact input
Any flowmeter with a mechanically or magnetically
activated switch contact located in the same
hazardous area as the Rate Totaliser may be
directly connected to pulse input terminals 5 and 6,
providing the flowmeter and associated wiring can
withstand a 500V rms insulation test to earth. Most
magnetically activated reed relays used in turbine
flowmeters comply with these requirements and the
requirements for simple apparatus. The BA334G
contains a configurable debounce circuit to prevent
false triggering. Three levels of de-bounce
protection are independently available.
See section 6.7.
4.1.4 Open collector input
Most certified intrinsically safe flowmeters with an
open collector output may be directly connected to a
BA334G input terminals 5 & 6, providing the input
safety parameters of the flowmeter (open collector)
are equal to or greater than the output safety
parameters of Rate Totaliser's pulse input. i.e.
Ui 10.5V dc
Ii 8.2mA dc
Pi 24mW
The flowmeter must be located in the same
hazardous area as the BA334G and the associated
wiring should be able to withstand a 500V rms
insulation test to earth.
The BA334G contains a configurable debounce
circuit to prevent false triggering. Three levels of de-
bounce protection are independently available.
See section 6.7.
4.1.5 2-wire proximity detector input
Most certified intrinsically safe flowmeters
incorporating a NAMUR 2-wire proximity detector
may be directly connected to a BA334G input,
providing the input safety parameters of the
flowmeter (proximity detector) are equal to or
greater than the output safety parameters of Rate
Totaliser's pulse input. i.e.
Ui 10.5V dc
Ii 8.2mA dc
Pi 24mW
The minimum operating voltage of the flowmeter
(proximity detector) should be less than 7.5V. The
flowmeter must be located in the same hazardous
area as the BA334G and the associated wiring
should be able to withstand a 500V rms insulation
test to earth.
The Rate Totalisers contain a configurable
debounce circuit to prevent false triggering. Three
levels of debounce protection are independently
available. See section 6.7.
4.1.6 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 BA334G input configuration menu is a
low level voltage pulse input intended for use with
an intrinsically safe magnetic pick-off. When a
Rate Totaliser is configured for CoiL and terminals
3 & 4 are not linked, the input terminals 5 & 6
comply with the requirements for simple apparatus
allowing connection to any certified intrinsically
safe magnetic sensor having output parameters
equal to or less than:
Uo 28V dc
Io 200mA dc
Po 0.84W
The maximum permitted cable parameters will be
the magnetic pick-off's Co and Lo specified on it's
intrinsic safety certificate, less the Rate Totalisers
pulse input parameters Ci and Li which are small
and can often be ignored.
The flowmeter must be located within the same
hazardous area as the Rate Totaliser and with the
associated wiring be able to withstand a 500V rms
insulation test to earth.
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 6.7.
4.1.7 Voltage pulse input
Two voltage pulse input ranges are selectable in
the BA334G Rate Totaliser configuration menu,
VoLt5 L and VoLt5 H. When configured for either
of the voltage pulse ranges and terminals 3 & 4 are
not linked, the input terminals 5 & 6 comply with
the requirements for simple apparatus. This allows
the input to be connected to any certified
intrinsically safe flowmeter with a voltage output
located in the same hazardous area as the Rate
Totaliser having output parameters equal to or less
than:
Uo 28V dc
Io 200mA dc
Po 0.84W
The Rate Totaliser input may therefore be directly
connected to most certified intrinsically safe
flowmeters with a high level voltage pulse output.
The maximum permitted cable parameters will be
defined by the intrinsic safety certification of the
flowmeter less the Rate Totalisers input
parameters Ci & Li which are small and can often
be ignored.
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 6.7.

12
4.1.8 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 mechanically
operated switch located in the same hazardous area
as the Rate Totaliser providing the switch and the
associated wiring can withstand a 500V rms
insulation test to earth. No Zener barrier is required.
A BA334G may also be remotely reset from the safe
area. Any switch may be used but a Zener barrier
is required to transfer the contact closure into the
hazardous area which may be combined with the
supply barrier so that only one package is required.
A diode return barrier is not suitable for this
application. Fig 2 illustrates how a BA334G may be
reset from both the safe and the hazardous area.
Note: The Rate Totaliser may be configured to
reset the total display to zero by operating
the &and *push buttons simultaneously
for more than three seconds in the totalising
mode i.e. when the instrument is displaying
flow. See 6.19
4.2 Use with Galvanic Isolators
Galvanic isolators are probably the simplest
intrinsically safe interface to install as they provide
isolation and do not require a high integrity earth
connection.
Any galvanic isolator may be used with the
BA334G providing it's certification is for use with
apparatus in the required Zone and gas group, and
it's output parameters do not exceed the input
parameters of the Rate Totaliser terminals to which
it is connected. It must also have the correct
function.
Fig 4 BA334G used with galvanic isolators.
Fig 4 illustrates the basic circuit that is used for all
BA334G installations protected by galvanic
isolators. For simplicity, connections for the pulse
output, optional alarms and 4/20mA output are
shown separately in sections 6.24 and 10 of this
manual.
The totaliser pulse source may be located in the
safe area as shown in Fig 5. An additional
galvanic isolator is used to transfer the signal to
the rate totaliser in the hazardous area, although it
may be difficult to find isolators for transferring
some flowmeter transducer outputs.

13
Fig 5 Pulse source in safe area
4.2.1 Power supply
The BA334G Rate Totaliser requires a minimum of
10V between terminal 1 & 2 and consumes:
10mA without optional backlight
plus 6mA when terminals 3 & 4 are
linked.
Total increases to 32mA when optional backlight is
fitted. Any galvanic isolator certified for the gas
group and Zone in which the BA334G is installed
may be used to power the instrument. The output
safety parameters of the isolator must be equal to or
less than the input safety parameters of terminals 1
& 2 and the voltage at terminals 1 & 2 must be
greater than 10V. These requirements are not
restrictive and allow a wide range of galvanic
isolators, such as solenoid drivers, to be used.
4.2.2 Pulse input
As shown in Figs 4 and 5 the BA334G inputs can be
directly connected to hazardous area flowmeters, or
to safe area flowmeters via isolators. Galvanic
isolators are not required in series with the input if
an intrinsically safe flowmeter is located within the
same hazardous area as the Rate Totaliser.
The BA334G Rate Totaliser may be used with
flowmeters having a wide variety of pulse outputs.
The following table shows the switching thresholds
for each type. For reliable operation the Rate
Totalisers input signal 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
Switch contacts, proximity detectors and open
collector sensors require energising which is
achieved by linking terminals 3 and 4 together as
shown in Figs 4 and 5.
4.2.3 Switch contact input
Any flowmeter with a mechanical or magnetically
activated switch contact output may be directly
connected to input terminals 5 & 6 providing the
flowmeter is located in the same hazardous area
as the Rate Totaliser and the flowmeter and
associated wiring can withstand a 500V rms
insulation test to earth. Most magnetically
activated reed relays used in turbine flowmeters
comply with these requirements. The BA334G
contains a configurable debounce circuit to prevent
contact bounce being counted. Three levels of de-
bounce protection are independently available.
See section 6.7.
4.2.4 Open collector input
Most certified intrinsically safe flowmeters with an
open collector output may be directly connected to
a BA334G input terminals 5 & 6, providing the
input safety parameters of the flowmeter (open
collector) are equal to or greater than the output
safety parameters of Rate Totaliser's pulse input.
i.e.
Ui 10.5V dc
Ii 8.2mA dc
Pi 24mW
The flowmeter must be located in the same
hazardous area as the BA334G and the
associated wiring should be able to withstand a
500V rms insulation test to earth.
The BA334G contains a configurable debounce
circuit to prevent false triggering. Three levels of
de-bounce protection are independently available.
See section 6.7.

14
4.2.5 2-wire proximity detector input
Most certified intrinsically safe flowmeters
incorporating a NAMUR 2-wire proximity detector
may be directly connected to a BA334G input,
providing the input safety parameters of the
proximity detector are equal to or greater than the
output safety parameters of a BA334G input. The
(flowmeter) proximity detector input safety
parameters should be:
Ui 10.5V dc
Ii 8.2mA dc
Pi 24mW
and the minimum operating voltage of the flowmeter
(proximity detector) is less than 7.5V. The flowmeter
must be located in the same hazardous area as the
Rate Totaliser, and with the associated wiring, be
able to withstand a 500V rms insulation test to earth.
The BA334G contain a configurable debounce
circuit to prevent false triggering of the instrument.
Three levels of de-bounce protection are available.
See section 6.7.
4.2.6 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 BA334G input configuration menu is a low
level voltage pulse input intended for use with an
intrinsically safe magnetic pick-off. When a Rate
Totaliser input is configured for CoiL and terminals 3
& 4 are not linked, input terminals 5 & 6 comply with
the requirements for simple apparatus allowing
connection to any certified intrinsically safe
magnetic sensor having output parameters equal to
or less than:
Uo 28V dc
Io 200mA dc
Po 0.84W
The maximum permitted cable parameters will be be
the flowmeter's Co and Lo specified on it's intrinsic
safety certificate, less the Rate Totalisers pulse input
parameters Ci and Li which are small and can often
be ignored.
The flowmeter must be located within the same
hazardous area as the BA334G and with the
associated wiring must be able to withstand a 500V
rms insulation test to earth.
The BA334G contain a configurable debounce
circuit to prevent false triggering of the instrument.
Three levels of de-bounce protection are
independently available. See section 6.7.
4.2.7 Voltage pulse input
Two voltage pulse input ranges are independently
selectable in the BA334G Rate Totalisers
configuration menu, VoLt5 L and VoLt5 H. When
configured for either of the voltage pulse ranges,
and terminals 3 & 4 are not linked, the input
terminals 5 & 6 comply with the requirements for
simple apparatus. This allows the pulse input to be
connected to any certified intrinsically safe
flowmeter with a voltage output located within the
same hazardous area as the Rate Totaliser
providing it has output parameters equal to or less
than:
Uo 28V dc
Io 200mA dc
Po 0.84W
The BA334G Rate Totalisers may therefore be
directly connected to most certified intrinsically
safe flowmeters with a high level voltage output.
The maximum permitted cable parameters will be
defined by the flowmeter's intrinsic safety Co and
Lo less the Rate Totaliser's pulse input parameters
Ci and Li which are small and can often be
ignored.
The BA334G contains a configurable debounce
circuit to prevent false triggering of the instrument.
Three levels of de-bounce protection are
available. See section 6.7.
4.2.8 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
mechanically operated switch located in the same
hazardous area as the Rate Totaliser providing the
switch and the associated wiring can withstand a
500V rms insulation test to earth. No galvanic
isolator is required.
A BA334G may also be remotely reset from the
safe area. Any switch may be used but a galvanic
isolator is required to transfer the contact closure
into the hazardous area. Fig 4 illustrates how a
BA334G may be reset from both the safe and the
hazardous area.
Note: The BA334G Rate Totaliser may be
configured to reset the total display to zero
by operating the &and * push buttons
simultaneously for more than three
seconds in the totalising mode i.e. when
the instrument is displaying flow. See
6.19

15
5. INSTALLATION
5.1 Location
The BA334G Rate Totaliser is housed in robust IP66
glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings making it suitable for exterior
mounting in most industrial on-shore and off-shore
installations. The Rate Totaliser should be
positioned where the display is not in continuous
direct sunlight. Special conditions apply for Zone 0
installations, see section 3.2.
Field wiring terminals are located on the rear of the
Rate Totaliser assembly as shown in Fig 7.
To ensure electrical continuity between the two
conduit or cable entries, the enclosure is fitted with a
bonding plate which includes an M4 earth stud.
This may be mounted on the inside or outside of the
enclosure. If the carbon loaded GRP enclosure is
not bolted to an earthed post or structure, this earth
stud should be connected to a local earth or the
plant potential equalising conductor.
An insulated M4 stud is provided in the bottom right
hand corner of the back-box for interconnecting
cable screens.
The BA334G Rate Totaliser may be pipe mounted
using a BA393G pipe mounting kit, or panel
mounted using a BA394G or BA395G panel
mounting kit.
5.2 Installation Procedure
Fig 6 illustrates the instrument installation
procedure.
A. Remove the Rate Totaliser assembly by
unscrewing the four captive 'A' screws.
B. Mount the enclosure back-box on a flat surface
and secure with screws or bolts through the
four 'B' holes. Alternatively use one of the pipe
or panel mounting kits which are available as
accessories.
C. Remove the temporary hole plug and install an
appropriate IP and temperature rated M20 x
1.5mm cable gland or conduit fitting. If two
entries are required, the supplied IP66
stopping plug should be replaced with an
appropriate IP and temperature rated M20 x
1.5mm cable gland or conduit fitting.
D. Connect the field wiring to the terminals as
shown in Fig 7. Replace the instrument
assembly on the back-box and evenly tighten
the four 'A' screws.
Fig 6 BA334G installation procedure
Fig 7 Dimensions and terminal connections

16
5.3 EMC
The BA334G complies with the requirements of the
European EMC Directive 2014/30/EU. For specified
immunity all wiring should be in screened twisted
pairs, with the screens earthed at one point in the
safe area.
5.4 Units of measurement and tag marking
on scale card.
The Rate Totaliser's units of measurement and tag
information are shown on a scale card which slides
into the instrument.
New Rate Totalisers are supplied with a printed
scale card showing the requested units of
measurement and tag information. If this information
is not supplied when the instrument is ordered, a
blank scale card will be fitted which can easily be
marked on-site with a dry transfer or a permanent
marker. Custom printed scale cards are available
from BEKA associates as an accessory.
To remove the scale card from a Rate Totaliser
carefully pull the transparent tab at the rear of the
instrument assembly away from the assembly as
shown in Fig 8a.
Fig 8a Removing scale card
To replace the scale card carefully insert it into the
slot on the right hand side of the input terminals as
shown in Fig 8b. Force should be applied evenly to
both sides of the scale card to prevent it twisting.
The card should be inserted until about 2mm of the
transparent tab remains protruding.
Fig 8b Inserting scale card into the
instrument assembly.

17
6. CONFIGURATION AND CALIBRATION
The BA334G Rate Totaliser is 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 10.
Each menu function is summarised in section 6.3 of
this manual and each summary includes a reference
to more detailed information. The sixteen segment
lineariser is described separately in section 7.
Configuration of the isolated pulse output, which is
fitted to all BA334G Rate Totalisers is described
separately in section 6.24. The optional outputs
which when fitted appear as additional functions in
the configuration menu are described in section 10.
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
Tot a l 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.
6.1 Configuration structure
Fig 9 shows the BA334G 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 7.
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 4546 . 1 which is the number of litres in
1,000 imperial gallons.
The BA334G uses ‘real’ decimal points. Moving the
position of a decimal point in a scale factor will
affect the instrument calibration.
Fig 9 Calibration structure

18
6.2 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 10.
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.
6.3 Summary of configuration functions
This section summarises all the configuration
functions. When read in conjunction with Fig 10 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 6.4
inPut Input
Contains sub-menu with two
functions
inP .TYPE Select Input type
dEbounCE Set debounce
See section 6.5
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 6.6
dEbounCE
Defines level of input debounce
applied to the pulse input to
prevent false counting:
dEFAuLt
HEAVY
LiGHt
See section 6.7
UpdAtE Display update interval
Define the interval between display
updates between 0.5 and 5
seconds.
See section 6.8

19
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 6.9
di5P-2 Lower display
Turns the lower display, which
normally shows rate, on or oFF.
See section 6.10
dP Decimal points
Defines the position of the decimal
point in both the rate and total
displays.
See section 6.11
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 6.12
5CALE .t Total Scale Factor
5CALE . tis 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 . tshould be set to 4546 .1
which is the number of litres in
1,000 imperial gallons.
5CALE . tmay be adjusted between.
0 .0001 and 99999.
The total flow display is independent
of the rate display.
See section 6.13
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 . rmay be adjusted
between 0.0001 and 99999. The
flow rate display is independent of
the total flow display.
See section 6.14
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 6.15
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 6.16
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 6.17

20
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 6.18
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 6.19
Local grand total reset clr gtot
When on is selected the grand total
is reset when )and *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 6.20
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 6.21
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 6.22
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 6.23