BEKA BA337E-SS User manual

Issue: 6
9th July 2019
BA337E-SS
Rugged one input
Intrinsically safe
pulse input
Rate Totaliser
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
4.3 Use in Ex e or Ex p panel enclosure
located in Zones 1 or 2.
4.3.1 Installation in Ex e panel enclosure
4.3.2 Installation in Ex p panel enclosure
5. Installation
5.1 Location
5.2 Installation procedure
5.3 EMC
5.4 Rate Totaliser earthing
5.5 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
222222222222222222
The BA337E-SS is 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 Summary of alarm configuration
functions.
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 when alarm occurs:
fl5h
10.4.13 Access setpoint: ac5p
10.4.14 Adjusting alarm setpoints
from totalisation mode
10.5 Pulse 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 pulse output: enbl
10.5.6 Source of pulse output: 5ource
10.5.7 Define output pulse frequency:
divide
10.5.8 Define 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 Access 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 Dust certification
Appendix 2 IECEx certification
Appendix 3 ETL & cETL certification
3
CONTENTS CONTINUED

4

1. DESCRIPTION
This rugged intrinsically safe, one input rate totaliser is
primarily intended for use with a pulse output
flowmeter. The instrument simultaneously displays
the rate of flow and the total flow in the same or
different engineering units on two separate displays.
It is 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.
This instruction manual supplements the abbreviated
instruction sheet supplied with each instrument.
The BA337E-SS has been certified intrinsically safe
for use in gas and dust hazardous areas by Notified
Body Intertek Testing and Certification Ltd and
complies with the European ATEX Directive
2014/34/EU. It has a rugged stainless steel enclosure
and an impact resistant glass window. In addition to
normal intrinsically safe applications, the certification
allows it to be installed in an Ex e, Ex n, Ex p or Ex t
panel enclosure without invalidating the enclosure's
certification.
For international applications the BA337E-SS has
IECEx certification which is described in Appendix 2.
For applications in the USA & Canada the BA337E-SS
has ETL and cETL certification which is described in
Appendix 3.
2. OPERATION
Fig 1 shows a simplified block diagram of the
BA337E-SS Rate Totaliser. The instrument can
accept pulses from most types of flowmeter sensor.
When connected to a pulse output flowmeter the
BA337E-SS 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-SS has a single pair of input terminals
for connection to all types of flowmeter sensors. 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 sensor input terminals.
Factory fitted optional accessories are shown below:
Backlight
Isolated dual alarms
or
Isolated 4/20mA output
or
Isolated pulse output
Only one output option may be fitted
Fig 1 BA337E-SS
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-SS 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 )+ *
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 Control 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
(+ )Access to configuration menu
2.3 Displays
The BA337E-SS has two digital displays and
associated annunciators, plus a flow indicator as
shown on front cover of this manual.
Total Shows the total flow on the
display upper eight digit display. May
be reset to zero via front panel
push buttons or by a remote
reset switch.
Rate Shows the flow rate on the
Display lower six
digit display.
Flow This disc in the lower left
indicator hand corner of the display
'rotates' for two seconds each
time an input pulse is received.
Appears to rotate continuously
when input frequency exceeds
0.5Hz.
Hold Activated when input
annunciator frequency is below the clip-off
threshold.
Reset Activated while instrument is
annunciator being reset via the front panel
push buttons, or the external
reset terminals.
Rate Identifies rate display
annunciator
Total Identifies total display
annunciator
RTx Retransmitted pulse
annunciator annunciator.
Depends upon the setting of
5ource in the pulse output
configuration menu.
5caled:
Annunciator activated each
time pulse output open
collector is on, i.e. Ron is
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-SS rate totaliser has ATEX and IECEx
gas and dust certification. This section of the
instruction manual describes ATEX gas certification.
Dust, 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-SS 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 Totaliser carries
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-SS 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.
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 to +60oC When installed as an
intrinsically safe Ex i
instrument in an Ex e, Ex n,
Ex p or Ex t enclosure.
-40 to +70oC When used as an intrinsically
safe Ex i instrument not in
an Ex e, Ex n, Ex p or Ex t
enclosure.
3.3 Special conditions for safe use
The ATEX intrinsic safety certificate number has an
‘X’ suffix indicating that for some applications special
conditions apply for safe use.
When installed in an Ex e, Ex n, Ex p or Ex t
panel enclosure all connections to the
BA337E-SS must be made by appropriately
rated Zener barriers or galvanic isolators.
This means that when installed in an Ex e, Ex n,
Ex p or Ex t panel enclosure the BA337E-SS
remains an intrinsically safe instrument and must
comply with the installation requirements shown in
this manual.
The certificate also states:
The front of the stainless steel enclosure
complies with the requirements for Ex e, Ex n
Ex p & Ex t type of protection.
Therefore when correctly installed the BA337E-SS
Rate Totaliser will not invalidate the Ex e, Ex n, Ex p
or Ex t panel enclosure certification.
Note: At temperatures below -20°C the instrument
will continue to function, but the display response will
become slower and the contrast will be reduced.
7

3.4 Power supply
When installed in a hazardous area the BA337E-SS
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 parameters 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-SS Rate Totaliser.
3.5 Pulse input terminals
The BA337E-SS Rate Totaliser has a single pair of
pulse input terminals 5 and 6 that may be configured
for use with different types of flowmeter sensor.
For flowmeters with sensors 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-
SS 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-SS 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-SS.
8

The BA337E-SS 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-SS 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-SS.
d. Minimum operating voltage of a flowmeter
incorporating a NAMUR compliant proximity
detector is less than 7.5V.
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-SS 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-SS 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.
A diode return barrier is not suitable for this
application. Almost any intrinsically safe relay with
certification permitting the contacts to be connected
to equipment in the hazardous area may be used.
Alternatively the BA337E-SS may be configured so
that the total display is reset to zero when the &
and *push buttons are operated simultaneously
for more than two seconds. See 6.19
9

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-SS Certification information label
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-SS.
Terminals 2, 6 and RS2 of the BA337E-SS 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 rms insulation to earth.
Any Zener barrier may be used with the
BA337E-SS 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-SS installations protected by Zener
barriers. For simplicity, connections for the optional
pulse output, 4/20mA output and alarms are shown
separately in section 10 of this manual.
Fig 2 BA337E-SS 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.
10

When designing a system it is important to remember
that terminals 2, 6 and RS2 are interconnected within
the BA337E-SS See Fig 1.
Fig 3 BA337E-SS used with Zener barriers pulse
source in safe area.
4.1.1 Power supply
The BA337E-SS 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
Any certified Zener barrier may be used to power a
BA337E-SS 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 and therefore increases the
minimum safe area operating voltage, see
section for details section 10.3 for details.
4.1.2 Pulse input
As shown in Figs 2 and 3 the BA337E-SS 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 pulse
input of the BA337E-SS 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 sensor
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-SS
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-SS contain a configurable debounce
circuit to prevent false triggering. Three levels of de-
bounce protection are independently available. See
section 6.7.
11

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 the BA337E-SS pulse 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-SS 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-SS 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.
4.1.7 Voltage pulse input
Two voltage pulse input ranges are selectable in the
BA337E-SS 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 Totaliser contains 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-SS 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-SS may
be reset from both the safe and the hazardous area.
Note: The BA337E-SS 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
12

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-SS 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-SS used with galvanic isolators.
Fig 4 illustrates the basic circuit that is used for all
BA337E-SS installations protected by galvanic
isolators. For simplicity, connections for the optional
pulse output, 4/20mA output and alarms 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 sensor
outputs.
Fig 5 Pulse source in safe area
4.2.1 Power supply
The BA337E-SS Rate Totalisers require a minimum
of 10V between terminal 1 & 2 and consumes:
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-SS 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 BA337E-SS input can
be directly connected to a hazardous area
flowmeter, or to a safe area flowmeter via isolators.
Galvanic isolators are not required in series with the
Rate Totaliser's pulse input when connected to an
intrinsically safe flowmeter located within the same
hazardous area as the BA337E-SS.
The BA337E-SS 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.
13

Input sensor
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-SS
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-SS contain a configurable debounce
circuit to prevent false triggering. Three levels of de-
bounce protection are independently available. See
section 6.7.
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-SS input,
providing the input safety parameters of the
proximity detector are equal to or greater than the
output safety parameters of the BA337E-SS 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) should be 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-SS 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-SS 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-SS and together
with the associated wiring be able to withstand a
500V rms insulation test to earth.
The BA337E-SS contain a configurable debounce
circuit to prevent false triggering of the instrument.
See section 6.7.
14

4.2.7 Voltage pulse input
Two voltage pulse input ranges are independently
selectable in the BA337E-SS 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-SS Rate Totaliser 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-SS 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-SS 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-SS may be reset from both the safe and the
hazardous area.
Note: The BA337E-SS 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
4.3 Use in an Ex e or Ex p panel enclosure
located in Zone 1 or Zone 2.
The BA337E-SS ATEX EC-Type Examination
Certificate allows the Rate Totaliser to be installed in
an Ex e IIC Gb increased safety panel enclosure
located in Zone 1 or 2, or in an Ex p IIC Gb
pressurised panel enclosure located in a Zone 1 or 2
hazardous area. The BA337E-SS may also be
installed in an Ex n enclosure located in Zone 2.
When installed in a certified panel enclosure the
BA337E-SS Rate Totaliser remains intrinsically safe
and must be protected by a Zener barrier or galvanic
isolator as described in sections 4.1 and 4.2.
However when correctly installed, the Rate Totaliser
does not invalidate the certification of the Ex e, Ex n
or Ex p panel enclosure allowing installation with
higher power control equipment.
4.3.1 Installation in an Ex e panel enclosure
Installation of a BA337E-SS Rate Totaliser in an
Ex e IIC Gb increased safety panel enclosure does
not invalidate the Ex e panel's ingress and impact
protection as the front of the BA337E-SS complies
with Ex e impact and ingress requirements.
Although mounted in an Ex e panel enclosure, the
BA337E-SS remains Group II Category 1G Ex ia IIC
T5 Ga intrinsically safe apparatus so must be
powered via a Zener barrier or galvanic isolator as
described in section 4.1 and 4.2 of this manual.
Fig 6 Typical installation in Ex e panel enclosure
15

Some Zener barriers and galvanic isolators are
certified for mounting within a protective enclosure
located in Zone 2 which may permit them to be
mounted in the same Ex e enclosure as the
BA337E-SS Rate Totaliser. Zener barriers and
galvanic isolators are not permitted in Ex e enclosures
located in Zone 1.
The Rate Totaliser terminals, the wiring to the Rate
Totaliser and the intrinsically safe interface, if mounted
within the enclosure, should be segregated from all
other non-intrinsically safe wiring and equipment
within the panel enclosure as required by EN
60079-11 Equipment protected by intrinsic safety and
EN 60079-14 Electrical installations design, selection
and erection.
The Ex e panel enclosure should be fitted with a
warning label saying 'Do not open when non-
intrinsically safe circuits are energised', alternatively
all bare live non-intrinsically safe parts within the
panel enclosure should have an IP30 cover carrying a
warning label 'Do not open when energised'.
The power dissipation within an BA337E-SS fitted with
operational alarms and a backlight is normally about
350mW. In the very unlikely event that all three
circuits fail to the worst case condition at the same
time, the total power dissipation rises to 2.5W which
could raise the internal temperature of a small
thermally well insulated panel enclosure.
4.3.2 Installation in Ex p panel enclosure within
Installation of a BA337E-SS Rate Totaliser in an Ex p
IIC Gb or Ex p IIC Gc pressurised panel enclosure
does not invalidate the Ex p panel's impact and
ingress protection as the front of the Rate Totaliser
complies with Ex p impact and ingress requirements.
Although mounted in an Ex p panel enclosure, the
BA337E-SS remains Group II Category 1G Ex ia IIC
T5 Ga intrinsically safe apparatus and must therefore
be powered via a Zener barrier or galvanic isolator as
described in section 4.1 and 4.2 of this manual to
ensure that the instrument's front panel push button
switches are nonincendive.
When installed in an Ex p panel enclosure the four
vents at the rear of the Rate Totaliser which are shown
in Fig 10 should not be obstructed.
Zener barriers and galvanic isolators may be installed
in the same Ex p enclosure as the BA337E-SS. All
may be mounted in an Ex px enclosure installed in
Zones 1 or 2, or in an Ex pz enclosure installed in
Zone 2, both of which have a non-hazardous interior.
Some Zener barriers and galvanic isolators may have
certification permitting installation within an Ex py
enclosure which has a Zone 2 interior.
The Rate Totaliser's terminals, the wiring to the Rate
Totaliser and the intrinsically safe interface, if mounted
within the enclosure, should be segregated from all
other non-intrinsically safe wiring and equipment
within the panel enclosure as required by EN 60079-
11 Equipment protected by intrinsic safety and EN
60079-14 Electrical installations design, selection
and erection.
If live maintenance is anticipated, it is recommended
that the Ex p panel enclosure should be fitted with a
warning label saying 'Do not open when non-
intrinsically safe circuits are energised', alternatively
all bare live non-intrinsically safe parts within the
panel enclosure should have an IP30 cover carrying
a warning label 'Do not open when energised'.
Fig 7 Typical installation in Ex p panel enclosure
16

5. INSTALLATION
5.1 Location
The BA337E-SS has a stainless steel case with a
10mm thick toughened glass window. The case
provides 7J and the window 4J front of panel impact
protection. The captive silicone gasket, which seals
the joint between the instrument and the panel
enclosure, ensures IP66 front of panel ingress
protection. The rear of the Rate Totaliser has IP20
protection.
Although the front of the BA337E-SS has IP66
protection, it should be shielded from continuous
direct sunlight and severe weather conditions.
The BA337E-SS may be located in Zone 0, 1 or 2
providing that the operating temperature is between
–40°C and +60°C and the installation complies with
the certification requirements.
Installation in Ex e and Ex p panel enclosures are
described in sections 4.3.1 and 4.3.2.
Fig 8 show the overall dimensions of the BA337E-SS
together with the recommended panel enclosure cut-
out dimensions and terminals.
5.2 Installation Procedure
a. Cut the aperture specified in Fig 8 in the panel
enclosure. Ensure that the edges of aperture are
de-burred.
b. Inspect the Rate Totaliser's captive gasket and
ensure that it is not damaged before inserting the
Rate Totaliser into the panel enclosure aperture.
c. If the enclosure panel is less than 1.0mm thick, or
is non-metallic, an optional BEKA stainless steel
support plate should be slid over the rear of the
Rate Totaliser before the panel clamps are fitted to
evenly distribute the clamping force and prevent
the enclosure panel being distorted or creeping.
d. Slide a panel clamp into the two grooves at each
corner of the indicator housing with the M3 stud
protruding through the hole at the rear of the
clamp. Fit the stainless steel spring washer over
the stud and secure with the stainless steel wing
nut.
e. Evenly tighten the four clamps to secure the
instrument. The recommended minimum tightening
torque for each wing nut is 22cNm (1.95 lbf in).
f. Connect the panel enclosure wiring to the rear
terminal blocks. To simplify installation, the
terminals are removable so that wiring can be
completed before the instrument is installed.
Cables should be mechanically secured to ensure
terminals are not damaged by vibration.
g. Finally, fit a silicone rubber push-on cap to the
end of each M3 threaded rod.
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 8 Dimensions & terminals
17

Fig 9 Installation procedure
5.3 EMC
The BA337E-SS 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
within the safe area.
Fig 10 Terminals for field wiring
5.4 Rate Totaliser earthing
The BA337E-SS has an M4 earth stud on the rear
panel which should be electrically connected to the
panel enclosure in which the indicator is mounted, or
to the plant equipotential conductor.
5.5 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 11.
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 indicator as
shown below.
Fig 11 Inserting flexible strip carrying scale card into
slot at the rear of the Rate Totaliser.
18

6.0 CONFIGURATION & CALIBRATION
The BA337E-SS 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 13.
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 optional pulse output, 4/20mA
output and alarms are described separately in section
10. When fitted they appear as an additional function
within the configuration menu.
All new Rate Totalisers are supplied configured 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 Calibration structure
Fig 12 shows the BA337E-SS 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
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 .1which is the number of litres in 1,000 imperial
gallons.
The BA337E-SS uses ‘real’ decimal points. Moving
the position of a decimal point in a scale factor will
affect the instrument calibration.
Fig 12 Calibration structure
19

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 13.
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 13 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
20