BEKA BA337E User manual

Issue: 6
9th July 2019
BA337E and BA338E
One input
intrinsically safe
pulse input
rate totalisers
Issue 6

1. Description
2. Operation
2.1 Initialisation
2.2 Controls
2.3 Displays
2.3.1 Display over-range
3. Intrinsic Safety Certification
3.1 ATEX gas certification
3.2 Zones, gas groups & T rating
3.3 Special conditions for safe use
3.4 Power supply
3.5 Pulse input
3.5.1 Flowmeters that don't require
energising.
3.5.2 Flowmeters that require energising
3.6 Remote reset terminals
3.7 Certification label information
4. System Design for 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 EMC
5.3 Installation procedure
5.4 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 Define security code: code
6.23 Reset to factory defaults: r5et def
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
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
22222222222222222222
The BA337E and BA338E are CE marked to show compliance with the European Explosive Atmospheres
Directive 2014/34/EU and the European EMC Directive 2014/30/EU
CONTENTS

10. Accessories
10.1 Scale card
10.2 Tag information
10.3 Backlight
10.4 Alarms
10.4.1 Solid state output
10.4.2 Intrinsic safety
10.4.3 Configuration and adjustment
10.4.4 Alarm enable: enbl
10.4.5 Type of alarm: type
10.4.6 Setpoint adjustment: 5p1x and 5p2x
10.4.7 Alarm function: hi.lo
10.4.8 Alarm output status: no.nc
10.4.9 Hysteresis: h5tr
10.4.10 Alarm delay: dela
10.4.11 Alarm silence time: 5il
10.4.12 Flash display: fl5h
10.4.13 Access setpoint: ac5p
10.4.14 Adjusting alarm setpoints
from totalisation mode:
10.5Pulse Output
10.5.1 Intrinsic safety
10.5.2 System design
10.5.3 Configuration
10.5.4 Pulse output: pul5e op
10.5.5 Enable: enbl
10.5.6 Pulse source: 5ource
10.5.7 Output pulse frequency: divide
10.5.8 Output pulse width: duration
10.5.9 Pulse storage
10.6 4/20mA output
10.6.1 Intrinsic safety
10.6.2 System design
10.6.3 Configuration
10.6.4 4/20mA output: 4-20op
10.6.5 Enable 4/20mA output: Enbl
10.6.6 Select rate or total source: 4-20type
10.6.7 Display for 4mA output: 4.000
10.6.8 Display for 20mA output: 20 .000
Appendix 1 IECEx certification
Appendix 2 ETL and cETL certification
3
CONTENTS CONTINUED

4

1. DESCRIPTION
These intrinsically safe, one input rate totalisers are
primarily intended for use with pulse output
flowmeters. The instruments simultaneously display
the rate of flow and the total flow in the same or
different engineering units on two separate displays.
They are controlled and configured via the four front
panel push buttons, a user defined four digit code
may be entered to prevent accidental access to the
instrument's configuration menu.
The two models are electrically similar, but have
different size displays and enclosures. The available
factory fitted accessories also vary.
Model Displays Bezel size
BA337E 8 digits 9mm high 96 x 48mm
6 digits 6mm high
BA338E 8 digits 18mm high 144 x 72mm
6 digits 12mm high
This instruction manual supplements the abbreviated
instruction sheet supplied with each instrument.
Both models have been certified intrinsically safe for
use in gas hazardous areas by Notified Body Intertek
Testing and Certification Ltd and comply with the
European ATEX Directive 2014/34/EU.
For international applications both models also have
IECEx certification which is described in Appendix 1.
For applications in the USA and Canada both models
have ETL and cETL certification which is described in
Appendix 2.
2. OPERATION
Fig 1 shows a simplified block diagram of the BA337E
and BA338E Rate Totalisers. The instruments can
accept pulses from most types of flowmeter
transducers. When connected to a pulse output
flowmeter the BA337E and BA338E 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 BA337E and BA338E have a single pair of input
terminals for connection to all types of transducer.
When counting pulses from a transducer requiring
energising, such as a switch contact, open collector or
a two wire proximity detector, an external link between
terminals 3 and 4 supplies power to the transducer
input terminals.
Factory fitted accessories include an internally
powered display backlight, dual alarms and an
isolated 4/20mA output which may be configured to
retransmit the rate or total display.
The larger BA338E Rate Totaliser is always supplied
with an isolated pulse output which can be
configured to synchronously retransmit the pulse
input, or the flow total. This output is only available
on the smaller BA337E Rate Totaliser as an option.
Factory fitted optional accessories for the two
models are shown below:
BA337E BA338E
96 x 48mm 144 x 72mm
Backlight Backlight
Isolated dual alarms* Isolated dual alarms
or
Isolated 4/20mA output* Isolated 4/20mA output
or
Isolated pulse output*
*Only one output option Isolated pulse output
may be fitted to BA337E always fitted to BA338E
Fig 1 BA337E and BA338E block diagram
2.1 Initialisation
Each time power is applied to the Rate Totaliser
initialisation is performed. After a short delay the
following display sequence occurs:
All segments of the display are activated
Instrument starts functioning using the
configuration information stored in permanent
memory. Unless total and grand total
displays have been reset to zero, new flow will
be added to the existing totals.
5

2.2 Controls
The BA337E and BA338E are controlled and
configured via four front panel push buttons. In the
totalisation mode i.e. when the instrument is
displaying rate and total flow the push button
functions are:
Push Button Functions
) + &Grand total - shows Lo followed by least
significant 8 digits of the 16 digit grand
total.
)+ *Grand total - shows Hi followed by the
most significant 8 digits of the 16 digit
grand total.
If Local Grand Total Reset CLr Gtot in
the instrument configuration menu has
been activated, operating the )+*
buttons for ten seconds will result in
Clr.no being displayed with the no
flashing. Operating the &or *button
will change the display to CLr–.–YE5,the
)button will then reset the grand total
to zero which will be confirmed by a brief
display of Gt Clrd. See 6.20
&+ * If Local Total Reset CLr tot in the
instrument configuration menu has been
activated, operating the &+*buttons
for three seconds will reset the total
display to zero and clear any pulses
stored in the optional pulse output.
The Grand Total is not reset.
See 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
- 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 10.4.13 and 10.4.14
(+ )Access to configuration menu
2.3 Displays
The BA337E and BA338E have two digital displays
and associated annunciators, plus a flow indicator
as shown on page 1.
Total Shows the total flow on the
display upper eight digit display. May
be reset to zero via front panel
push buttons or by a remote
reset switch.
Rate Shows the flow rate on the
Display lower six digit display.
Flow This disc in the lower left
indicator hand corner of the display
'rotates' for two seconds each
time an input pulse is received.
Appears to rotate continuously
when input frequency exceeds
0.5Hz.
Hold Activated when input
annunciator frequency is below the clip-off
threshold.
Reset Activated while instrument is
annunciator being reset via the front panel
push buttons, or the external
reset terminals.
Rate Identifies rate display
annunciator
Total Identifies total display
annunciator
RTx Retransmitted pulse
annunciator annunciator.
Depends upon the setting of
5ource in the pulse output
configuration menu.
5caled:
Annunciator activated each
time pulse output open
collector is on,i.e.Ronis
less than 60+ 3V.
direct:
Annunciator continuously
activated.
2.3.1 Display over-range
Over-range of the upper eight digit display or the
lower six digit display is indicated by all the digits
displaying 9and all the decimal points flashing.
6

3. INTRINSIC SAFETY CERTIFICATION
The BA337E and the BA338E rate totalisers have
ATEX and IECEx gas certification. This section of the
instruction manual describes ATEX gas certification.
IECEx and other approvals are each described in
separate appendixes to this manual.
3.1 ATEX gas certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA337E and the BA338E with an
EC-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. The
Rate Totalisers carry the European 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 complying
with EN60079-14 Electrical Installation 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 BA337E and BA338E Rate Totalisers have been
certified Ex ia IIC T5 Ga -40ºC Ta +70ºC. When
connected to a suitable system they 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.
In gases that may be used with equipment having a
temperature classification of:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1 450ºC
T2 300ºC
T3 200ºC
T4 135ºC
T5 100ºC
At ambient temperatures between -40 and +70ºC.
Note: The specified operating temperature of the
BA337E and BA338E is -40 to +70°C. At
temperatures below -20°C the instruments will
continue to function, but the display digits will
change more slowly and contrast will be reduced.
This allows the Rate Totalisers 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 95ºC.
3.3 Special conditions for safe use
The ATEX certificate has an ‘X’ suffix indicating that
special conditions apply to prevent an electrostatic
charge developing on the outside of the instrument
enclosure.
WARNING
To avoid an electrostatic charge being
generated instrument enclosure should
only be cleaned with a damp cloth.
3.4 Power supply
When installed in a hazardous area the BA337E and
the BA338E 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
BA337E or BA338E Rate Totaliser.
7

3.5 Pulse input terminals
The BA337E and BA338E Rate Totalisers have 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 BA337E or BA338E 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
3.5.1 Flowmeter sensors that don't 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 BA337E or BA338E 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.
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 BA337E or BA338E.
The BA337E and BA338E EC-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.
3.5.2 Flowmeter sensors that require 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 3.5. 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 BA337E or BA338E energised input
providing that:
a. The flowmeter is a certified intrinsically safe
device having input parameters equal to or
greater than:
Ui 10.5V dc
Ii 9.2mA dc
Pi 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 BA337E or BA338E.
d. Minimum operating voltage of a flowmeter
incorporating a proximity detector is less than
7.5V.
8

The BA337E and BA338E EC-Type Examination
Certificate specifies that 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.
3.6 Remote reset terminals
The BA337E and BA338E 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 BA337E or BA338E Rate
Totaliser. The switch and associated wiring should
be able to withstand a 500V rms insulation test to
earth.
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 positive polarity
Zener barrier may also be used as shown in Fig 2.
Alternatively the BA337E or BA338E 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
3.7 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.
BA337E Certification information label
9

4. SYSTEM DESIGN FOR 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 BA337E or BA338E.
Terminals 2, 6 and RS2 of the BA337E and BA338E
Rate Totalisers 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 insulation to earth.
Any Zener barrier may be used with the BA337E and
BA338E 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 Totaliser
system.
Fig 2 illustrates the basic circuit that is used for all
BA337E and BA338E installations protected by Zener
barriers. For simplicity, connections for the pulse
output and optional alarms and 4/20mA output are
shown separately in section 10 of this manual.
Fig 2 BA337E or BA338E used with Zener barriers
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 BA337E and the BA338E
See Fig 1.
Fig 3 BA337E or BA338E used with Zener barriers
pulse source in safe area.
4.1.1 Power supply
The BA337E and the BA338E Rate Totalisers
require 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
BA337E or BA338E 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
increase the instrument's current
consumption and therefore increases the
minimum safe area operating voltage, see
section 10.3 for details.
10

4.1.2 Pulse input
As shown in Figs 2 and 3 the BA337E and the
BA338E 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 0mV 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.
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. The BA337E and
the BA338E contain a configurable debounce circuit
to prevent contact bounce being counted. See
section 6.7.
4.1.4 Open collector input
Certified intrinsically safe flowmeters with an open
collector 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.
The BA337E and BA338E contain 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 BA337E or BA338E
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
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
BA337E or BA338E 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. 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 BA337E and BA338E 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.
See section 6.7.
11

4.1.7 Voltage pulse input
Two voltage pulse input ranges are selectable in the
BA337E and BA338E 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.
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 BA337E or BA338E 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
BA337E or BA338E may be reset from both the safe
and the hazardous area.
Note: Both Rate Totalisers may be configured to
reset the total display to zero by operating the
&and *push buttons simultaneously for
more than two seconds in the totalising mode
i.e. when the instrument is displaying flow.
See 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 BA337E
and BA338E 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 BA337E or BA338E used with galvanic
isolators.
Fig 4 illustrates the basic circuit that is used for all
BA337E and BA338E installations protected by
galvanic isolators. For simplicity, connections for
the pulse output and optional alarms and 4/20mA
output are shown separately in section 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.
12

Fig 5 Pulse source in safe area
4.2.1 Power supply
The BA337E and the BA338E Rate Totalisers require
a minimum of 10V between terminal 1 & 2 and
consume:
10mA without optional backlight
plus 6mA when terminals 3 & 4 are linked
Any galvanic isolator certified for the gas group and
Zone in which the BA337E or BA338E 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 inputs
As shown in Figs 4 and 5 the BA337E and BA338E
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 BA337E and BA338E 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 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
BA337E and BA338E contain 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
Certified intrinsically safe flowmeters with an open
collector 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.
The BA337E and BA338E contain a configurable
debounce circuit to prevent false triggering. Three
levels of de-bounce protection are independently
available. See section 6.7.
13

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 BA337E or BA338E input,
providing the input safety parameters of the proximity
detector are equal to or greater than the output safety
parameters of a BA337E or BA338E 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 BA337E and BA338E 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
BA337E and BA338E 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 BA337E or BA338E and with
the associated wiring must be able to withstand a
500V rms insulation test to earth.
The BA337E and BA338E contain a configurable
debounce circuit to prevent false triggering of the
instrument. See section 6.7.
4.2.7 Voltage pulse input
Two voltage pulse input ranges are independently
selectable in the BA337E and BA338E 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 BA337E and BA338E 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 BA337E and BA338E contain a configurable
debounce circuit to prevent false triggering of the
instrument. Three levels of de-bounce protection are
available.
See section 6.7.
4.2.8 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 BA337E or BA338E 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 BA337E or BA338E may be reset from both
the safe and the hazardous area.
Note: Both Rate Totalisers may be configured to
reset the total display to zero by operating
the &and *push buttons simultaneously
for more than two seconds in the totalising
mode i.e. when the instrument is displaying
flow. See 6.19
14

5. INSTALLATION
5.1 Location
Both models have a robust glass reinforced Noryl
enclosure with a toughened glass window. The fronts
of the Rate Totalisers have IP66 ingress protection
and a gasket seals the joint between the instrument
enclosure and the panel. The rear of both Rate
Totalisers have IP20 ingress protection.
Figs 6A and 6B show the overall dimensions of the
96 x 48mm BA337E and the 144 x 72mm BA338E
and the recommended panel cut-out dimensions. To
achieve an IP66 seal between the instrument
enclosure and the instrument panel the smaller
tolerance aperture must be used, and the BA338E
must be secured with four panel mounting clamps.
Cut-out dimensions
Recommended for all installations.
Mandatory to achieve an IP66 seal
between the instrument and the panel
90 +0.5/-0.0 x 43.5 +0.5/-0.0
DIN 43 700
92.0 +0.8/ -0.0 x 45 +0.6 -0.0
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 6A BA337E dimensions & terminals
Cut-out dimensions
Recommended for all installations.
Mandatory to achieve an IP66 seal
between the instrument and the panel
136.0 +0.5/-0.0 x 66.2 +0.5/-0.0
DIN 43 700
138.0 +1.0/-0.0 x 68.0 +0.7/-0.0
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 6B BA338E dimensions & terminals
Although the front of both Rate Totalisers have IP66
protection, they should be shielded from direct
sunlight and severe weather conditions.
The Rate Totalisers may be installed in any panel
providing that the operating temperature is between
-40ºC and +70ºC and the intrinsic safety
requirements are complied with. At temperatures
below -20ºC the display digits will change more
slowly and contrast will be reduced, but the
instruments will continue to function and totalise.
5.2 EMC
The BA337E and BA338E comply with the
requirements of the European EMC Directive
2014/30/EU. For specified immunity all wiring
should be in screened twisted pairs, with the
screens earthed at one point within the safe area.
15

5.3 Installation Procedure
a. Cut the specified aperture in the panel. To
achieve an IP66 seal between the instrument
enclosure and the instrument panel the aperture
must have the tighter tolerances specified in
Figs 6A and 6B.
b. Slide the gasket over the body of the Rate
Totaliser before inserting the instrument into the
panel aperture.
c. Firstly ensure that all the panel mounting clamps
are closed by turning the knurled screws fully
anti clockwise until the two pips in the clamp foot
align with holes in the clamp body.
d. Place a clamp in the recess on each side of the
Rate Totaliser, pulling gently to slide it onto the
dovetail as shown in Fig 7. Push the knurled
screw slightly forward to engage the thread and
tighten by turning clockwise until it is just finger
tight. When the clamps are fitted ensure that
the gasket behind the front panel bezel is
correctly positioned before fully tightening the
clamps to secure the instrument. The maximum
recommended clamp tightening torque is 22cNm
(1.95 lbf in) which is approximately equivalent
to finger-tight plus one half turn. Do not over
tighten.
e. Four panel mounting clamps are required to
achieve an IP66 seal between a BA338E and
the instrument panel.
f. Connect the panel wiring to the rear terminal
block(s) as shown in Figs 6A and 6B. To
simplify installation, the terminals are removable
so that the panel wiring can be completed
before the instrument is installed. To prevent
vibration damage ensure that panel wiring is
supported.
Fig 7 Fitting panel mounting clamps
5.4 Scale card
The Rate Totaliser’s units of measurement are
shown on a printed scale card in a window at the
right hand side of the display. The scale card is
mounted on a flexible strip that is inserted into a slot
at the rear of the instrument as shown in Fig 8.
Thus the scale card can easily be changed without
removing the Rate Totaliser from the panel or
opening the instrument enclosure.
New Rate Totalisers are supplied with a printed
scale card showing the requested units of
measurement, if this information is not supplied
when the instrument is ordered a blank card will be
fitted.
A pack of self-adhesive scale cards printed with
common units of flow measurement is available as
an accessory from BEKA associates. Custom
printed scale cards can also be supplied.
To change a scale card, unclip the tapered end of
the flexible strip at the rear of the instrument by
gently pushing it upwards and pulling it out of the
enclosure. Peel the existing scale card from the
flexible strip and replace it with a new printed card,
which should be aligned as shown below. Do not fit
a new scale card on top of an existing card.
Install the new scale card by gently pushing the
flexible strip into the slot at the rear of the Rate
Totaliser, when it reaches the internal end-stop
secure it by pushing the end of the flexible strip
downwards so that the tapered section is held by the
rear panel.
Align the self-adhesive
printed scale card onto
the flexible strip and
insert the strip into the
Rate Totaliser as
shown below.
Fig 8 Inserting the flexible strip carrying the scale
card into slot at the rear of Rate Totaliser.
16

6.0 CONFIGURATION & CALIBRATION
The BA337E and BA338E Rate Totalisers are
configured and calibrated via four front panel push
buttons. All the configuration functions are contained
in an easy to use intuitive menu that is shown
diagrammatically in Fig 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 BA338E Rate Totalisers but is an option on
the BA337E, and the optional alarms and 4/20mA
output are described separately in section 10. When
fitted they appear as additional functions within the
configuration menu.
All new Rate Totalisers are supplied calibrated as
requested at the time of ordering. If calibration is not
requested, Rate Totalisers will have default
configuration as shown in the following table, but can
easily be re-configured on-site.
Function Display Default
Access code CodE 0000
Function FunCtion 5td
Input inP .tYPE oP .CoL
Debounce dEbounCE dEFAuLt
Update uPdAtE 0 .5
Upper display di5p-1 totAL
Lower display di5P-2 on
Decimal point dP Rate 0.0
Total 0
K Factor FACtor 1 .0
Total scale factor 5CALE .t1.0
Rate scale factor 5CALE .r1.0
Timebase t-bA5E 5EC
Filter FiLter 24
Clip-off CLP-oFF 0
Local total reset t-rE5Et oFF
Local grand total reset Gt-rE5Et oFF
Security code CodE 0000
Note: While the instrument is being configured
totalisation continues so that any flow occurring during
this time is recorded.
6.1 Configuration structure
Fig 9 shows the BA337E and BA338E 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
4,546 .1which is the number of litres in 1,000
imperial gallons.
The BA337E and the BA338E uses ‘real’ decimal
points. Moving the position of a decimal point in a
scale factor will affect the instrument calibration.
Fig 9 Calibration structure
17

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
18

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-t is a dividing factor that
converts the pulse output from FACtor
into the required total display in
engineering units. e.g. if the output
from FACtor is one pulse per litre and
the total display is required in
thousands of gallons, 5CALE-t should
be set to 4546 .1 which is the number
of litres in 1,000 imperial gallons.
5CALE-t may be adjusted between.
0.0001 and 99999.
The total flow display is independent
of the rate display.
See section 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 . r may 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
19

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 )+*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
20