BEKA BA354E User manual

Issue: 5
14th October 2015
BA354E
Intrinsically safe
4/20mA loop powered
field mounting
Rate Totaliser
Issue 5

1. Description
2. Operation
2.1 Controls
2.2 Displays
3. Intrinsic Safety Certification
3.1 ATEX gas certificate
3.2 Zones, gas groups & T rating
3.3 /20mA input
3. Reset terminals
3.5 Certification label information
4. System Design for Hazardous Areas
.1 Flow transmitter loops
.2 Resetting the total display to zero
.3 Remote indication
5. Installation
5.1 Location
5.2 Installation procedure
5.3 EMC
6. Configuration and Calibration
6.1 Calibration structure
6.2 Accessing configuration & calibration
functions.
6.3 Summary of configuration
functions.
6. Rate totaliser function
6.5 Display resolution
6.6 Display update time
6.7 Upper display
6.8 Lower display
6.9 Position of decimal points
6.10 Calibration of rate display using an
external current source.
6.11 Calibration of rate display using internal
reference.
6.12 Clear grand total
6.13 Timebase
6.1 Function of P push button
6.15 Total scale factor
6.16 Clip off
6.17 Local reset of total & grand total
displays.
6.18 Security code
6.19 Reset to factory defaults
6.20 Over-range
7. Lineariser
7.1 Calibration using external current
source.
7.1.1 Example, Adding break-points
to a new Rate Totaliser
7.2 Calibration using internal reference
7.2.1 Example, Adding break-points
to a new Rate Totaliser
7.3 Error messages
7. Under and over-range
7.5 Default configuration
8. Calibration Examples
8.1 Using an external current source
8.2 Using the internal reference
9. Maintenance
9.1 Fault finding during commissioning
9.2 Fault finding after commissioning
9.3 Servicing
9. Routine maintenance
9.5 Guarantee
9.6 Customer comments
10. Accessories
10.1 Units of measurement and
instrument identification.
10.2 Alarms
10.2.1 Solid state output
10.2.2 Intrinsic safety
10.2.3 Configuration and adjustment
10.2. Alarm enable
10.2.5 Type of alarm
10.2.6 Setpoint adjustment
10.2.7 Alarm function
10.2.8 Alarm output status
10.2.9 Hysteresis
10.2.10 Alarm delay
10.2.11 Alarm silence time
10.2.12 Flash display
10.2.13 Access setpoint
10.2.1 Adjusting alarm setpoints
from display mode.
10.3 Display backlight
10.3.1 Loop powered
10.3.2 Separately powered
10. External keypad
10.5 Pipe mounting kits
Appendix 1
ATEX dust certification
Appendix 2
IECEx certification
Appendix 3
FM and cFM certification
22222222
The BA35 E is CE marked to show compliance with the European Explosive Atmospheres Directive
9 /9/EC and the European EMC Directive 200 /108/EC
CONTENTS

1. DESCRIPTION
The BA35 E is an intrinsically safe /20mA loop-
powered Rate Totaliser primarily intended for use
with flowmeters. The instrument simultaneously
displays the rate of flow and the total flow in
engineering units on two separate displays. The
BA35 E only introduces a 1.2V drop which allows
it to be installed into almost any /20mA flow loop.
No additional power supply or battery is required.
The rate totaliser 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
9 /9/EC. Dust certification is an option described
in Appendix 1 which must be requested when the
instrument is ordered. The EC-Type Examination
certificate specifies that under fault conditions the
output voltage, current and power at the /20mA
input terminals will not exceed those specified for
simple apparatus in Clause 5.7 of EN 60079-11,
which simplifies installation and documentation.
For international applications the BA35 E has
IECEx certification - described in Appendix 2.
Housed in a robust IP66 glass reinforced polyester
(GRP) enclosure with an armoured glass window,
the BA35 E is surface mounting, or may be pipe
mounted using one of the accessory kits.
2. OPERATION
Fig 1 shows a simplified block diagram of a
BA35 E. The /20mA input current flows through
resistor R1 and forward biased diode D1. The
voltage developed across D1, which is relatively
constant, is multiplied by a switch mode power
supply and used to power the instrument. The
voltage developed across R1, which is proportional
to the /20mA input current, provides the input
signal for the analogue to digital converter.
Each time a /20mA current is applied to the
instrument, initialisation is performed. After a short
delay the following display sequence occurs which
takes about twelve seconds:
All segments of the display are activated
Loading message displayed
Configuration message displayed
Model and firmware version displayed
Rate Totaliser starts functioning, using
configuration information stored in
instrument’s permanent memory. Unless
total and grand total displays have been
reset to zero, new flow will be added to
the existing totals.
If the /20mA current is disconnected during
operation the latest total and grand total are stored.
Fig 1 Simplified block diagram of BA35 E
2.1 Controls
The BA35 E is controlled and calibrated via four
push buttons which are located behind the
instrument control cover, or as an option on the
outside of the instrument control cover. In the
operating mode i.e. when the instrument is
displaying rate and total flow the push button
functions are:
Summary of Push Button Functions
PDisplays input current in mA or as a
percentage of span. Modified when
optional alarms are fitted.
▼ Shows rate display calibration at mA
input.
▲ Shows rate display calibration at
20mA input.
EShows time since instrument was
powered or total display was reset.
E+▼ Grand total –
displays least significant 8 digits
E+▲ Grand total –
Initially displays most significant 8
digits.
After 10 seconds grand total may be
reset to zero. Configurable function.
▼+▲ Resets total display
Configurable function
P+▼ Show firmware version
P+▲ Alarm setpoint access
Configurable function
P+E Access to configuration menu
3

Full Description of Push Button Functions
PWhile this button is pushed the rate
display will show the input current in
mA, or as a percentage of the
instrument span depending upon how
the instrument has been configured.
When the button is released the normal
display in engineering units will return.
The function of this push button is
modified when optional alarms are fitted
to the instrument.
▼While this button is pushed the
instrument will show the calibrated rate
display with mA* input - usually zero
for flow applications. When the button
is released the flow rate will again be
displayed.
▲ While this button is pushed the
instrument will show the calibrated rate
display with 20mA* input. When the
button is released the flow rate will
again be displayed.
EWhile this button is pushed the Rate
Totaliser will display the time in hours,
minutes and seconds since the
instrument was powered or the total
display was reset. The elapsed time is
not saved when power is removed.
E+▼ While these buttons are pushed the
total display will show the least
significant eight digits of the grand total,
and the grand total annunciator will be
activated.
E+▲ While these two buttons are pushed the
total display will show the most
significant eight digits of the grand total
and the grand total annunciator will be
activated.
After the two buttons have been pushed
for ten seconds ‘CLr no’ with the ‘no’
flashing will be displayed. If no action
is required, pressing E will return the
instrument to the operating mode.
Operating the ▼ or ▲ button will toggle
the display to ‘CLr YES’ with ‘YES’
flashing, operating the E button will then
clear the grand total and ‘Gt CLrd’ will
be displayed to confirm the operation.
The instrument will then automatically
return to the operating mode.
Selectable function in configuration
menu. See section 6.17
Note: Totalisation will continue until
‘CLr no’ or ‘CLr YE5’ are displayed.
▼+▲ Resets the total display to zero
when these two push buttons are
operated simultaneously. Selectable
function in the configuration menu.
See section 6.17
P + ▼ Rate Totaliser displays firmware
version.
P + ▲ Provides direct access to the alarm
setpoints when optional alarms are
fitted to the Rate Totaliser and the
‘AC5P’ access setpoints in display
mode function has been enabled.
See section 10.2.13
P+E Provides access to the configuration
menu via optional security code.
Note: * If the Rate Totaliser has been
calibrated using the CAL function,
calibration points may not be and
20mA.
2.2 Displays
The BA35 E has two digital displays and
associated annunciators, plus a flow indicator as
shown on page 1.
Lower Shows the flow rate on the five digit
display plus sign 12mm high display.
Upper Shows the total flow on the eight digit,
display (seven with negative sign) 18mm high
display which may be reset to zero by
operating the ▼+ ▲ instrument push
buttons or by an external contact
closure.
The rate and total displays may be interchanged,
see section 6.7
Flow This disc on the lower left hand side of
indicator the display rotates when the input
current
exceeds .000mA, indicating that flow
is being detected by the Rate Totaliser.
For bi-directional flow, the disc rotates
when flow exceeds ±0.05% of span.
Annunciators
Reset Activated when total display is reset to
zero by operating the ▼ + ▲ buttons
simultaneously or by connecting the
reset terminals together.
Hold Activated when flow rate falls below the
clip-off value and totalisation is
inhibited.

Grand Is a 16 digit (15 digit with negative sign)
Total number which is not zeroed when the
total display is zeroed. The Grand Total
is viewed from the operating mode as
two eight digit numbers, it may be reset
to zero from within the configuration
menu or from the operating mode.
3. INTRINSIC SAFETY CERTIFICATION
The BA35 E rate totaliser has ATEX and IECEx
gas certification plus optional dust certification.
This section of the instruction manual describes
ATEX gas certification. Optional ATEX dust,
IECEx and other approvals are described in
separate appendixes to this manual.
3.1 ATEX gas certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA35 E with an EC-Type
Examination Certificate number
ITS11ATEX27253X. This confirms compliance
with harmonised European standards and it has
been used to confirm compliance with the
European ATEX Directive for Group II, Category
1G equipment, Ex ia IIC T5 Ga Ta = - 0 to
+70ºC. The Rate Totaliser bears the community
mark and subject to local codes of practice may be
installed in any of the European Economic Area
(EEA) member countries. ATEX certificates are
also acceptable for installations in Switzerland.
This section of the instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN60079-1 Electrical
Installations in Hazardous Areas. 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 BA35 E Rate Totaliser has been certified
Ex ia IIC T5 Ga. When connected to a suitable
system it may be installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture likely
to occur in normal operation.
Zone 2 explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
In gases that may be used with equipment having
a temperature classification of :
T1 50oC
T2 300oC
T3 200oC
T 135oC
T5 100oC
At ambient temperatures between - 0 and +70oC.
CAUTION installation in Zone 0
When installed in a Zone 0 potentially e plosive
atmosphere requiring EPL Ga apparatus, the
instrument shall be installed such that even in
the event of rare incidents, an ignition source
due to impact or friction between the aluminium
label and iron/steel is e cluded.
No special conditions apply when the indicator is
installed in Zone 1 or in Zone 2.
Note: The specified operating temperature of the
BA35 E is –20 to +70ºC. At temperatures below
–20ºC the instrument will continue to totalise but
the display will not function.
This allows the Rate Totaliser to be installed in all
gas Zones and to be used with most common
industrial gases.
3.3 4/20mA input
The input safety parameters for the /20mA input,
terminals 1 and 3 are:
Ui = 30V dc
Ii = 200mA
Pi = 0.8 W
The maximum equivalent capacitance and
inductance between the two /20mA input
terminals 1 and 3 is:
Ci = 13nF
Li = 16µH
The maximum permitted loop cable parameters
can be calculated by adding these figures to Ci and
Li of other instruments in the loop and subtracting
the totals from the maximum cable capacitance Co
and cable inductance Lo permitted for the Zener
barrier or galvanic isolator powering the loop.
Although the BA35 E does not comply with the
requirements for simple apparatus, the EC-Type
Examination Certificate states that for intrinsic
safety considerations, under fault conditions the
output voltage, current and power at terminals 1 &
3 will not exceed those specified by clause 5.7 of
EN 60079-11 for simple apparatus. This simplifies
the application and intrinsic safety documentation
for a loop into which the BA35 E is connected.
Apart from Ci, the affect of the Rate Totaliser may
be ignored when assessing loop safety.
5

3.4 Reset terminals
The BA35 E total display may be reset to zero by
connecting the reset terminals RS1 and RS2
together. These two terminals have the following
input and output intrinsic safety parameters:
Ui = 30V dc
Ii = 200mA dc
Pi = 0.8 W
Uo = 6V dc
Io = 2.5mA dc
Po = 3.75mW
The maximum equivalent capacitance and
inductance between them is:
Ci = 13nF
Li = 8H
The total display may be reset to zero from within
the hazardous area by any mechanically operated
switch connected directly to terminals RS1 and
RS2. Alternatively, the BA35 E may be configured
so that the total display is reset to zero when the ▲
and ▼ push buttons are operated simultaneously
for two seconds.
To reset the total display from 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. Alternatively, a positive polarity
Zener barrier with intrinsic safety parameters equal
to or less than the input safety parameters of the
reset terminals may be used as shown in Fig 3A.
The total resistance of the barrier, switch and
interconnecting wiring must be less than 1kΩ.
Note:
The negative reset terminal RS2 is internally
connected to the negative /20mA input
terminal 3.
3.5 Certification label information
The certification information label is fitted in a
recess on the top outer surface of the instrument
enclosure. It shows the ATEX certification
information and BEKA associates' name and
location. Non European certification information
may also be shown. The instrument serial number
and date of manufacturer are recorded on a
separate label inside the terminal compartment.
BA35 E certification label
6

4. SYSTEM DESIGN FOR HAZARDOUS AREA
4.1 Flow transmitter loops
A BA35 E Rate Totaliser may be connected in
series with almost any intrinsically safe /20mA
flow loop and calibrated to display the rate of flow
and total flow. There are three basic design
requirements:
1. The intrinsic safety output parameters of the
/20mA loop, which are defined by the Zener
barrier or galvanic isolator powering the loop,
must be equal to or less than:
Uo = 30V dc
Io = 200mA
Po = 0.8 W
2. The maximum permitted cable capacitance of the
loop must be reduced by 13nF. The maximum
permitted cable inductance is not reduced by the
inclusion of the BA35 E.
3. The loop must be able to tolerate the additional
1.2V required to operate the Rate Totaliser.
When fitted with an optional backlight this
increases to 5.0V if the backlight is loop powered.
See 10.3.1
Figs 2a and 2b illustrates typical applications in
which a Rate Totaliser is connected in series with a
2-wire flow transmitter powered by a Zener barrier
and alternatively by a galvanic isolator.
Fig 2a Loop powered by a Zener barrier
Fig 2b Loop powered by a galvanic isolator
4.2 Resetting the total display to zero
The BA35 E total display may be reset to zero by
momentarily connecting the reset terminals RS1
and RS2 together with a resistance of less than
1kΩ. Within the hazardous area in which the
BA35 E is located this may be achieved with a
manually activated industrial push button as shown
in Fig 3b.
The push button switch and the wiring connecting it
to the Rate Totaliser must comply with the
requirements for simple apparatus specified in
Clause 5.7 of EN60079-11. i.e. be able to
withstand a 500V rms insulation test for one
minute. The switch must comply with electrostatic
requirements specified by Clause 7 of EN60079-0
and material composition defined in Clause 8.
If it is required to reset the total display from the
safe area a Zener barrier, galvanic isolator or
intrinsically safe relay must be used to transfer the
contact closure into the hazardous area. Fig 3a
shows how a single channel positive polarity Zener
barrier may be used.
Note:
The negative reset terminal RS2 is internally
connected to the negative /20mA input
terminal 3.
4.3 Remote indication
A BA35 E may be driven via an intrinsically safe
interface from a /20mA safe area signal to provide
a remote indication of rate and total flow within a
hazardous area. The type of interface is not
critical, either a Zener barrier or a galvanic isolator
may be used, providing that Ui, Ii and Pi of the
BA35 E /20mA input are not exceeded.
If one side of the /20mA current loop may be
earthed, a single channel Zener barrier provides
the lowest cost protection. If the /20mA signal is
not isolated, then two Zener barriers, a two
channel Zener barrier or a galvanic isolator must
be used.
When the hazard is a IIC gas and two single
channel Zener barriers or a two channel Zener
barrier are used, only one barrier or channel may
be a 28V 93mA device. A 10V 50 or diode
return barrier may be used for the second channel
to form a safe combination.
Again it is necessary to ensure that the voltage
capability of the /20mA signal is sufficient to drive
the Rate Totaliser plus the voltage drop introduced
by the intrinsically safe interface. Figs 3a, 3b and
3c show the alternative circuits which may be
used.
7

Fig 3a Simplest circuit with one side of
20mA current loop connected to
earth.
Also illustrates resetting from safe area.
Fig 3b Two Zener barrier channels are
required if the /20mA current loop
can't be earthed at the barrier busbar.
Also shows optional resetting from
hazardous area
Fig 3c Galvanic isolator can be used with any
/20mA current loop.
8

5. INSTALLATION
5.1 Location
The BA35 E Rate Totaliser is housed in robust
IP66 glass reinforced polyester (GRP) enclosures
incorporating an armoured glass window and
stainless steel fittings making it suitable for exterior
mounting in most industrial installations, including
off-shore and waste water treatment.
The BA35 E will function and is certified
intrinsically safe at ambient temperatures between
– 0ºC and +70ºC, but the display only functions at
ambient temperatures between –20ºC and +70ºC,
The enclosure is surface mounting but may be pipe
mounted using one of the accessory kits described
in section 10.5 of this manual. The field terminals
and the two mounting holes are located in a
separate compartment with a sealed cover
allowing the instrument to be installed without
exposing the display assembly.
Terminals 2 and are internally joined and may be
used for linking the return /20mA wire - see Fig 2.
Similarly terminals 5 and 6 are internally joined and
may be used for linking cable screens. The Rate
Totaliser’s earth terminal is connected to the
carbon loaded GRP enclosure. If this enclosure is
not bolted to an earthed post or structure, the earth
terminal should be connected to the plant potential
equalising conductor.
The enclosure is fitted with a bonding plate to
ensure electrical continuity between the three
conduit / cable entries.
5.2 Installation Procedure
Fig illustrates the instrument installation
procedure.
1. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
2. Mount the instrument on a flat surface and
secure with screws or bolts through the two
'B' holes. Alternatively use one of the pipe
mounting kits described in section 10.5.
3. Remove the temporary hole plug and install
an appropriate IP rated cable gland or
conduit fitting. If more than one entry is
required, one or both of the IP66 stopping
plugs may be replaced with an appropriate IP
rated cable gland or conduit fitting.
. Connect the field wiring to the terminals as
shown in Fig 5 and replace the instrument
terminal cover. Evenly tighten the two 'A'
screws.
Fig BA35 E installation procedure
Fig 5 Dimensions and terminal connections
5.3 EMC
The BA35 E complies with the requirements of the
European EMC Directive 200 /108/EC. For
specified immunity all wiring should be in screened
twisted pairs, with the screens earthed in the safe
area.
9

6. CONFIGURATION AND CALIBRATION
The BA35 E is configured and calibrated via four
push buttons that are located behind the
instrument control cover. If frequent access to
the push buttons is required, the Rate Totaliser can
be supplied with duplicate membrane keypad
mounted on the outside of the control cover.
All the configuration functions are contained in an
easy to use menu that is shown diagrammatically
in Fig 7. Each function is summarised in section
6.3 which includes references to more detailed
information. Although this simple menu driven
system enables most adjustments to be made
without repeated reference to this manual, it is
recommended that at least the summary of the
configurable functions in section 6.3 is read before
attempting configuration or recalibration.
When the instrument is fitted with alarms, the basic
menu is expanded to include the alarm functions
that are described in section 10.2 of this manual.
Note:
While the instrument is being configured or
calibrated totalisation is suspended, any flow
occurring during this time will not be
recorded.
6.1 Calibration structure
Fig 6 shows the BA35 E calibration structure. The
/20mA input current, which in flow applications
represents flow rate, is usually displayed on the
five digit plus sign lower display. If necessary this
flow signal may be linearised using the square root
extractor or the 16 segment lineariser which are
selectable in the instrument’s ‘FunC’ sub-menu.
The rate display may then be calibrated using the
'CAL' or '5Et' functions to show the flow rate in the
required linear engineering units. Both the zero
(display at mA) and the span (display at 20mA)
are adjustable, although for unidirectional flow
application the display at mA is usually zero.
The position of the decimal point in the rate display
is defined by the ‘dP’ function. To simplify
calibration the BA35 E uses floating point
arithmetic, moving the rate display decimal point
position will therefore affect totalisation.
For bi-directional flow applications zero flow will be
represented by an input current other than mA.
When one of the two bi-direction functions in the
‘FunC’ sub-menu is selected, input currents below
that representing zero flow will be shown as a
negative flow rate and the total flow display will
count down. For input currents above that
representing zero flow will be shown as a positive
flow rate and the total flow display will count up.
Fig 6 Calibration structure
The BA35 E total display is calculated from the
rate display using two serial factors: the timebase
't-bA5E' and the total scaling factor '5CALE-t'. The
timebase divides the rate display according to
whether the rate display represents flow per
second, per minute or per hour. The total scaling
factor '5CALE-t' is a wide range configurable
dividing factor allowing the rate and total displays
to be in different units.
10

For example, if a BA35 E is displaying rate in litres
per minute, setting '5CALE-t' to .5 61 produces a
total display in UK gallons. Alternatively, setting
'5CALE-t' to 5 6.1 will produce a total display in
thousands of UK gallons.
The total is calculated and the display updated
once per second, which defines the resolution of
the total flow display. When total alarms are used
for batching applications, this resolution may define
the accuracy of the system.
6.2 Accessing the configuration and
calibrations functions.
Throughout this manual push buttons are shown
as P, E, ▼ or ▲, and legends displayed by the
Rate Totaliser are shown within inverted commas
e.g. 'CAL' and ' ALr2'.
Access to the configuration menu is obtained by
operating the P and E push buttons
simultaneously. If the Rate Totaliser’s security
code is set to the default 0000 the first parameter
'FunC' will be displayed. If a security code other
than the default code 0000 has already been
entered, the Rate Totaliser will display 'CodE'.
Pressing the P button will clear this prompt
allowing each digit of the code to be entered using
the ▲ and ▼ push buttons and the P button to
move control to the next digit. When the correct
four digit code has been entered pressing E will
cause the first parameter 'FunC' to be displayed.
If the code is incorrect, or a button is not pressed
within twenty seconds, the Rate Totaliser will
automatically return to the display mode.
Once within the configuration menu the required
parameter can be reached by scrolling through the
menu using the ▲ and ▼ push buttons as shown
in Fig 7. When returning to the display mode
following recalibration or a change to any function,
the Rate Totaliser will display ‘dAtA’ followed by
‘SAVE’ while the new information is stored in non-
volatile memory.
All new Rate Totalisers are supplied calibrated as
requested at the time of ordering. If calibration is
not requested, Rate Totalisers will be supplied with
the following default configuration:
Default Configuration
Access code ‘CodE’ 0000
Function ‘FunC’ ‘5td’ Linear
Rate display at mA ‘Zero’ 0.00
Rate display at 20mA ‘5PAn’ 100.00
Resolution ‘rE5n’ 1 digit
P button in display mode ‘C—P’ %
Local reset of total ‘t-rE5Et’ off
Local reset of grand total ‘Gt-rE5Et’ off
Clip off ‘CLIP oFF’ 000.00
Timebase ‘t-bA5E’ 1
Total scale factor ‘5CALE-t’ 1.00
Upper display ‘di5P-1’ Total
Update time ‘uPdAtE’ 1
11

6.3 Summary of configuration functions
This section summarises each of the main
configuration functions and includes a cross
reference to a more detailed description. Fig 7
illustrates the location of each function within the
configuration menu. The lineariser and the
optional factory fitted alarms are described
separately in sections 7 and 10.2 of this manual.
Display Summary of function
'FunC' Rate Totaliser function
Defines the relationship between the
/20mA input current and the
instruments rate display.
For uni-directional flow may be set
to:
‘5td’ Standard linear relationship
‘root’ Square root extraction
‘Lin’ 16 segment adjustable
lineariser – see section 7.
For bi-directional flow may be set
to:
‘bi-5td’ Standard linear relationship
‘bi-Lin’ 16 segment adjustable
lineariser – see section 7.
See section 6.
'rE5n' Display resolution
Defines the resolution of the least
significant rate display digit. May be
set to ‘1’, ‘2’, ‘5’ or ‘10’ digits.
See section 6.5
‘uPdAtE’ Update
Defines the interval between
updates. May be set to ‘1’, ‘2’, ‘3’,
‘ ’ or ‘5’ seconds.
See section 6.6
‘di5P 1’ Upper display
Defines whether ‘totAL’ or ‘rAtE’ is
shown on the upper eight digit
display.
See section 6.7
‘di5P 2’ Lower display
Turns lower six digit display ‘on’ or
‘oFF’.
See section 6.8
'dP' Decimal points
Positions the decimal point in the
‘rAtE’ and ‘totAL’ displays.
See section 6.9
Display Summary of function
'CAL' Calibration of the rate display
using an external current source.
Enables the zero and span of the
rate display to be adjusted using an
external current source such as a
calibrator. When used with an
accurate traceable calibrator this is
the preferred method of calibration.
See section 6.10
'5Et' Calibration of rate display using
internal references.
Enables the zero and span of the
rate display to be adjusted without
the need for an accurate input
current or disconnection from the
/20mA loop.
See section 6.11
‘Clr.Gtot’ Clear grand total
Resets the sixteen digit grand total
to zero when ‘Clr.YES’ is selected
and ‘5urE’ is entered digit by digit to
confirm the instruction.
Note: Once cleared a grand total
can not be recovered.
See section 6.12
‘t bA5E’ Timebase
Selectable divisor to display flow
rate 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 6.13
'C P' Function of P push button
The Rate Totaliser may be
configured to display the input
current in milliamps, or the input
current as a percentage of the
/20mA input when the P push
button is operated in the display
mode.
Select:
‘PC’ % of /20mA input
‘ -20’ Current in mA
Note: ‘PC’ is not available with
lineariser.
See section 6.1
12

Display Summary of function
‘5CALE t’ Total scale factor
Defines the arithmetic relationship
between the rate and total displays.
May be adjusted between 0.0001
and 99999
SCALE-t = Units of rate display
Units of total display
To calculate SCALE-t the required
units of measurement for the total
display must be converted to the
units of measurement used for the
rate display.
See section 6.15 and Fig 6.
'CLiP oFF' Clip off
To prevent the totalisation of very
low flow rates, this function defines
the flow rate below which totalisation
is inhibited and the ‘HOLD’
annunciator activated.
See section 6.16
'LoC.r5Et' Local reset of total and grand
total.
Contains two independent functions
‘t-rE5et’ and ‘Gt-rE5Et’.
‘t-rE5Et’ enables the total display to
be reset to zero when ▼ and ▲
push buttons are operated
simultaneously for more than 2
seconds.
‘Gt-rE5Et’ enables the grand total to
be reset to zero when E and ▲ push
buttons are operated simultaneously
for more than 10 seconds.
See section 6.17
'CodE' Security code
Defines a four digit numeric code
that must be entered to gain access
to the configuration menu. Default
code 0000 disables this security
function and allows unrestricted
access to all conditioning functions.
See section 6.18
Display Summary of function
'r5Et' Reset Rate Totaliser to factory
defaults.
Contains two sub-functions,
Select:
‘ConF’ Returns instrument to
default configuration
shown in section 6.2
‘LtAb’ Returns lineariser to
defaults shown in
section 7.5
Both instructions must be confirmed
by entering ‘5urE’ digit by digit
before they will be executed.
See section 6.19
13

1

6.4 Rate Totaliser function: ‘FunC’
This configuration function defines the relationship
between the Rate Totaliser’s /20mA input current
and the instruments’s rate display. Three
alternatives are available for uni-direction flow and
two for bi-direction flow.
For uni-directional flow:
‘5td’ Standard linear relationship
‘root’ Square root extraction
‘Lin’ 16 segment adjustable lineariser
For bi-directional flow:
‘bi-5td’ Standard linear relationship
‘bi-Lin’ 16 segment adjustable lineariser
To reveal the existing instrument function select
'FunC' from the configuration menu and press P.
If the function is set as required, press E to return
to the menu, or press the ▲ or ▼ button to change
the setting, followed by the E button to return to the
configuration menu.
‘5td’ Linear
Provides a linear relationship between the
/20mA Rate Totaliser input current and
the instruments rate display for
uni-directional flow.
‘root’ Square root extraction
Primarily intended to linearise the square
law /20mA output from differential
flowmeters.
For reference, the following table shows
the output current from a non-linearised
differential flowmeter.
% of full flow Current output mA
2.5 .01
10.0 .16
25.0 5.00
50.0 8.00
75.0 13.00
100.0 20.00
When the root function is selected the Rate
Totaliser will display flow in linear units for
uni-directional flow.
‘Lin’ 16 segment adjustable lineariser
May be adjusted to compensate for
flowmeter non-linearity with uni-directional
flow. Use of the lineariser is described in
section 7 of this instruction manual.
‘bi 5td’ Linear
Provides a linear relationship between the
/20mA Rate Totaliser input current and
the instruments rate display for
bi-directional flow.
‘bi Lin’ 16 segment adjustable lineariser
May be adjusted to compensate for
flowmeter non-linearity with bi-directional
flow. Use of the lineariser is described in
section 7 of this instruction manual.
6.5 Display resolution: rE5n
This function defines the resolution of the least
significant display digit of the rate display.
Decreasing the display resolution can improve the
readability of a noisy signal. Select ''rE5n' from
the menu and press P which will reveal the current
display resolution. To change the resolution press
the ▲ or ▼ button to select 1, 2, 5 or 10 digits,
followed by the E button to enter the selection and
return to the configuration menu.
6.6 Display update time: ‘uPdAtE’
If the rate display is likely to change rapidly,
extending the time between display updates will
make the display easier to read. Five different
intervals between readings are selectable, 1, 2, 3,
or 5 seconds.
To reveal the existing update time select 'uPdAtE'
from the configuration menu and press P. If the
time is set as required, press E to return to the
menu, or press the ▲ or ▼ button to change the
time, followed by the E button to return to the
configuration menu.
This function only changes the interval between
successive display updates, it does not change the
instrument accuracy.
6.7 Upper display: ‘di5P 1’
The Rate Totaliser has two numeric displays:
Upper
8 digit 18mm high intended for showing total flow
display range –9999999 to 99999999
Lower
6 digits 12mm high intended for showing flow rate
display range –99999 to 99999
This function interchanges the rate and total
displays when the flow rate is required to be
predominant, resulting in a 5 digit plus sign upper
rate display and a 6 digit lower total display, or 5
digits plus sign when negative.
To reveal the existing upper display function select
'di5P-1' from the configuration menu and press P.
If set as required, press E to return to the
configuration menu, or press the ▲ or ▼ button to
toggle the function between ‘totAL’ and ‘rAtE’.
When set as required press E to enter the
selection and to return to the configuration menu.
15

6.8 Lower display: ‘di5P 2’
When only one display is required this function
allows the lower display to be disabled. To reveal
if the lower display is activated select 'di5P-2' from
the configuration menu and press P. If set as
required, press E to return to the configuration
menu, or press the ▲ or ▼ button to toggle the
function between ‘on’ and ‘oFF’. When set as
required press E to enter the selection and to
return to the configuration menu.
6.9 Position of the decimal points: ‘dP’
This function defines the position of the decimal
point in both the rate and total displays.
Rate display
The rate display can have up to five digits plus
sign, the decimal point may be positioned
between any of the digits, or may be omitted.
The BA35 E uses floating point arithmetic so
moving the position of the rate display decimal
point will affect totalisation.
Total display
The total display can have up to eight digits or
seven digits with a negative sign, the decimal
point may be positioned with up to five digits
after it, or it may be omitted.
Notes:
a. The position of the decimal point in the
Grand Total will be the same as that
selected for the Total Display.
b. If the total display decimal point can’t be
moved to the left it is likely that the existing
display will be over-ranged by the
adjustment. The total display should be
reset to zero, which should allow the decimal
point to be positioned as required.
c. If the decimal point is moved to the right, the
existing total display will be truncated, not
rounded, the lost precision can not be
recovered.
Positioning the decimal points
To adjust the position of either the rate or total
display decimal point select 'dP' from the
configuration menu and press P. The upper
display defined as the rate or total display by
function ‘di5P-1’ (section 6.7) will be activated
and identified. The decimal point can be
positioned by operating the ▼ or ▲ push
button, when set as required enter the setting
and return to the conditioning menu by
operating the E button. Alternatively, to position
the lower display decimal point press the P
button which will display and identify the lower
display variable, but on the larger upper display.
The position of the decimal point can be
positioned in the same way by operating the ▼
and ▲ push buttons, when set as required
enter the setting and return to the conditioning
menu by operating the E button.
6.10 Calibration of the rate display using an
external current source: ‘CAL’
This function enables the zero and span of the rate
display to be adjusted using an external calibrated
current source. When used with an accurate
traceable current source this is the preferred
method of calibration.
Zero rate display with mA input
Span rate display with 20mA input
To calibrate the rate display select 'CAL' from the
configuration menu and press P. The BA35 E will
display 'ZEro' which is a request for a mA input
current. Adjust the external current calibrator to
.000mA and again press P which will reveal the
current zero rate display. The flashing digit of the
display can be changed by pressing the ▲ or ▼
buttons, when set as required pressing P will
transfer control to the next digit. When all the
digits have been adjusted, press E to enter the
new zero and return to the 'ZEro' prompt .
Pressing the ▲ button will cause the BA35 E to
display 'SPAn' which is a request for a 20mA input
current. Adjust the external current calibrator to
20.000mA and again press P which will reveal the
existing span rate display. The flashing digit of the
display can be changed by pressing the ▲ or ▼
buttons, when set s required pressing P will
transfer control to the next digit. When all the
digits have been adjusted press E to enter the new
rate span and return to the 'SPAn' prompt. Finally
press E again to return to the configuration menu.
Notes:
a. The Rate Totaliser input current must be
adjusted to the required value before the zero
and span functions are entered by pressing the
P button.
b. Rate Totalisers may be calibrated at currents
other than and 20mA, within the range 3.8 to
21.0mA providing the difference between the
two currents is greater than mA. If these
conditions are not complied with, the
instrument displays ‘FaiL’ and aborts the
calibration.
c. If the zero current is greater than the span
current the instrument will be reverse acting
i.e. an increasing input current will cause the
display to decrease.
16

6.11 Calibration of the rate display using
internal reference: ‘5Et’
Using the ‘5Et’ function the rate display can be
calibrated without the need to know the value of
the /20mA input current, or to disconnect the
BA35 E Rate Totaliser from the /20mA loop.
When using the ‘5Et’ function the instrument’s
internal reference is used to simulate a mA and
20mA input current.
Zero rate display with a simulated mA input
Span rate display with a simulated 20mA input
To calibrate the rate display select '5Et' from the
configuration menu and press P. The Rate
Totaliser will display 'ZEro', pressing P again will
reveal the current rate display at mA. The
flashing digit can be adjusted by pressing the ▲ or
▼ buttons, when set as required pressing P will
transfer control to the next digit. When all the
digits have been adjusted, press E to return to the
'ZEro' prompt.
To adjust the rate display at 20mA, press the ▲
button which will cause the Rate Totaliser to
display '5PAn', pressing P will then reveal the
existing rate display at 20mA. The flashing digit
can be adjusted by pressing the ▲ or ▼ buttons,
when set as required pressing P will transfer
control to the next digit. When all the digits have
been adjusted press E twice to return to the '5PAn'
prompt followed and then to the ‘5Et’ prompt in the
configuration menu.
6.12 Clear grand total: ‘Clr.Gtot’
The grand total is a separate sixteen digit counter
which duplicates the total display but is not zeroed
when the total display is reset to zero. The grand
total may be viewed in the operating mode in two
eight digit sections as described in section 2.1 of
this manual. The following table illustrates how
grand totals are displayed.
Grand total High display Low display
123 567890123 56 123 5678 90123 56
-123 -123
-123 5678 - 123 5678
-123 567890 -12 32567890
-123 567890123 5 -123 567 890123 5
The grand total counter can be reset to zero from
the 'CLr.Gtot' function in the configuration menu, or
from the operating mode if the local grand total
reset has been activated, see section 6.17.
To zero the grand total from within the
configuration menu select 'Clr.Gtot' and press P
which will cause the instrument to display 'Clr.no'.
Press the ▼ or ▲ button until 'CLr.YES' is
displayed and then press P which will result in a
'0000' prompt. Using the ▼ and ▲ buttons and
the P button to move to the next digit, enter '5urE'
digit by digit to confirm the instruction. Pressing E
will then reset the grand total counter to zero,
briefly displaying ‘Gt CLrd’ to confirm that the
instruction has been performed and return the
instrument to the 'CLr.Gtot' prompt in the
configuration menu.
CAUTION
After resetting the original grand
total can not be recovered.
6.13 Timebase: t bA5E
Together with the total scale factor '5CALE-t', this
function defines the arithmetic relationship
between the rate and total displays. The
timebase divides the rate display by 1, 60 or 3,600
depending upon whether the BA35 E rate display
represents flow per second, per minute or per
hour. See Fig 6.
To check or change the timebase select 't-bA5E'
from the configuration menu and press P which will
reveal the current setting. Pressing the ▼ or ▲
button will index though the following three options.
BA35 E
Rate display
Represents
flow
Select
in
t-bA5E
menu
Total display
= rate display
divided by
Per second ‘tb – 1’ 1
Per minute ‘tb – 60’ 60
Per hour ‘tb – 3600’ 3600
After selecting the required divisor, press E to
return to the ‘t-bA5E’ prompt in the configuration
menu.
6.14 Function of the P push button: ‘C P’
When the Rate Totaliser is in the operating mode,
operating the P push button will display the input
current in milliamps, or the displayed flow rate as a
percentage of the difference between the displayed
flow rate at mA and 20mA inputs.
To check or change the function of the P push
button select 'C - -P' from the configuration menu
and press P to reveal the current setting. Pressing
the ▲ or ▼ button will toggle the setting between
' -20' the current display in milliamps and 'PC' the
percentage display. When set as required press
E to return to the ‘C - - P’ prompt in the
configuration menu.
Note: The percentage option ‘PC’ is not available
when the sixteen segment lineariser is selected
see section 6. .
17

6.15 Total scale factor: ‘5CALE t’
Together with the timebase 't-bA5E', this is a
dividing factor that defines the arithmetic
relationship between the rate and total displays.
When the flow rate and the total flow are required
in the same units 5CALE-t = 1.0
The total scale factor may be set to any value
between 0.0001 and 99999 allowing the total flow
and rate of flow to be displayed in different
engineering units.
5CALE-t = Units of rate display
Units of total display
When calculating 5CALE-t the required units of
measurement for the total display must be
converted to those used for the rate display as
shown in the following example:
The BA35 E rate display represents litres per
second but the total flow display is required in UK
gallons. There are .5 61 litres in a UK gallon.
5CALE-t = Units of rate display
Units of total display
= 1 litre
1 gallon
= 1 litre
1 / .5 61 litres
5CALE-t = .5 61
Alternatively, if the total display is required in
thousand of UK gallons
= 1 litre
1 / 5 6.1 litres
5CALE-t = 5 6.1
The total scale factor 5CALE-t is not dependent on
the rate display units of time. i.e. flow units per
second, minute or per hour. The timebase t-bA5E
accounts for these differences.
To check or change the total scale factor select
'5CALE-t' from the configuration menu and press P
to reveal the existing setting, one digit will be
flashing. The value of the flashing digit may be
changed by pressing the ▼ or ▲ button. When
this digit is set as required pressing P will transfer
control to the next digit, which may be adjusted in
the same way.
To position the decimal point, repeatedly operate
the P button until the decimal point starts flashing.
The decimal point can then be positioned by
pressing the ▼ or ▲ button.
When the required total scale factor has been set,
press E to enter the number and return to the
‘5CALE-t’ prompt in the configuration menu.
6.16 Clip off: ‘CLiP oFF’
To prevent totalisation of very low flow rates, which
over long periods may result in significant
totalisation errors, the BA35 E rate display can be
conditioned to stop totalisation when the flow rate
falls below a specified clip-off threshold. Clip-off
is an absolute value, for bi-direction flow systems it
inhibits totalisation for flow rates between +clip-off
and –clip-off.
Clip-off is shown in the same units as the
instruments rate display. To check or change the
clip-off threshold select 'CLiP-oFF' from the
configuration menu and press P to reveal the
current level, one digit will be flashing. The value
of the flashing digit may be changed by pressing
the ▼ or ▲ button. When this digit is set as
required pressing P will transfer control to the next
digit, which may be adjusted in the same way.
When set as required, press the E button to enter
the revised threshold and return to the ‘CliP-oFF’
prompt in the configuration menu.
For uni-directional flow when the flow rate falls
below the clip-off threshold, totalisation is inhibited,
the hold annunciator is activated but the flow
indicator continues to rotate until the input current
falls below mA.
For bi-directional flow when the positive or
negative flow rate is less than the absolute clip-off
threshold, totalisation is inhibited and the hold
annunciator is activated. The flow indicator
continues to rotate until the low rate is less than
±0.05% of flow rate display span.
6.17 Local reset of total and grand total.
‘LoC. R5Et’
This function contains two sub-functions ‘t-rE5Et’
and ‘Gt-rE5Et’ which allow the total display and the
grand total to be independently reset using the
instrument push buttons without access to the
configuration menu from the operating mode.
When enabled, ‘t-rE5Et’ allows an operator to reset
the BA35 E total display to zero by operating the
▼ and ▲ push buttons simultaneously for at least
two seconds. To check the status of ‘t-rE5Et’
select 'LoC.r5Et'' from the configuration menu and
press P. Using the ▼ or ▲ button select ‘t-rE5Et’
and press P which will reveal if the function is
turned 'on' or 'oFF'. Operating the ▼ or ▲ button
will toggle the display between the two conditions.
18

When set as required pressing the E button will
enter the selection and return the display to the
‘t-rE5Et’ sub-function. The remote reset facility
described in section .2 of this manual is not
affected by the status of this local reset function.
When enabled, ‘Gt-rE5Et’ allows an operator to
reset the BA35 E grand total to zero by operating
the E and ▲ push buttons simultaneously for at
least ten seconds. To check the status of ‘t-rE5Et’
select 'LoC.r5Et'' from the configuration menu and
press P. Using the ▼ or ▲ button select
‘Gt-rE5Et’ and press P which will reveal if the
function is turned 'on' or 'oFF'. Operating the ▼ or
▲ button will toggle the display between the two
conditions. When set as required pressing the E
button will enter the selection and return the
display to the ‘Gt-rE5Et’ sub-function.
6.18 Security code: ‘CodE’
Access to the instrument configuration menu may
be protected by a four digit security code which
must be entered to gain access. New instruments
are configured with the default security code 0000
which allows unrestricted access to all
configuration functions.
To enter a new security code select 'CodE' from
the configuration menu and press P which will
cause the Rate Totaliser to display the existing
security code with one digit flashing. The flashing
digit can be adjusted using the ▲ and ▼ push
buttons, when set as required operating the P
button will transfer control to the next digit. When
all the digits have been adjusted press E to return
to the ‘CodE’ prompt in the configuration menu.
The revised security code will be activated when
the Rate Totaliser is returned to the display mode.
Please contact BEKA associates sales department
if the security code is lost.
6.19 Reset to factory defaults: ‘r5Et’
This function enables the Rate Totaliser and the
lineariser to be quickly returned to the factory
default configurations shown in sections 6.2 and
7.5
To reset the Rate Totaliser or lineariser select
‘r5Et’ from the configuration menu and press P, the
Rate Totaliser will display one of the reset options
‘ConF’ or ‘LtAb’.
‘ConF’ Resets the Rate Totaliser to defaults
‘LtAb’ Resets the lineariser to defaults
Using the ▲ or ▼ push-button select the required
sub-function and press P. To prevent accidental
resetting the request must be confirmed by
entering ‘5urE’. Using the ▲ button set the first
flashing digit to ‘5’ and press P to transfer control
to the second digit which should be set to ‘u’.
When ‘5urE’ has been entered pressing the E
button will reset the selected configuration menus
and return the display to the ‘r5Et’ function in the
configuration menu.
6.20 Over range
Numerical over-range of the rate or total displays is
indicated by all the digits displaying ‘9’ and all the
decimal points flashing.
When the total display exceeds 99999999 or
-9999999 it will not automatically roll-over to zero
and continue counting, but the grand total will
continue to count. If it is likely that the total will
exceeds 99999999 or -9999999 the grand total,
which has a capacity of 1016 and –1015 counts,
should be reset to zero at the start of the operation.
If the total display exceeds 99999999 or -9999999
when the BA35 E has been configured for bi-
directional flow, the total display will be locked and
will not record flow in the opposite direction to the
over-range, although the grand total will continue
to function.
19

7. LINEARISER
A sixteen segment, seventeen break-point (0 to 16)
lineariser may be selected in the ‘FunC’ section of
the configuration menu. The position of each
break-point is fully adjustable so that the slope of
the straight line between break-points can be set to
compensate for a non-linear flow meter. Each
break-point must occur at a current greater than
the preceding break-point and less than the
following break-point, in the range 3.8 to 21.0mA.
If this requirement is not observed when
configuring the lineariser the Rate Totaliser will
display 'FaiL' and the configuration adjustment
which produced the error message will be ignored.
Fig 8 shows a typical linearised Rate totaliser
characteristic.
Fig 8 shows a typical linearising characteristic
Selecting ‘Lin’ or 'bi-Lin' in the ‘FunC’ section of the
configuration menu activates the lineariser, this
does not change the configuration menu shown in
Fig 7, but the 'CAL' and 'SEt' functions are
extended as shown in Fig 9. As with a linear
Rate Totaliser, calibration may be performed with
an external current source using the 'CAL' function,
or with the internal reference using the 'SEt'
function.
The lineariser calibration is retained irrespective of
how the Rate Totaliser function ‘FunC’ is
subsequently changed. It is therefore possible to
select and deselect the lineariser without having to
reconfigure it each time.
The lineariser calibration may be reset to the
factory default settings without changing the Rate
Totaliser configure using the 'LtAb' function
described in section 6.19.
7.1 Lineariser calibration using an external
current source.
This method allows direct calibration of the
lineariser with an external current source and is the
preferred method when traceability is required. If
the exact system non-linearity is unknown, this
method also allows direct calibration from the
variable to be displayed.
The number of break-point required should first be
entered using the 'Add' and 'dEL' functions. In
both these sub-functions the Rate Totaliser initially
displays the current break-point and the total
number of break-points being used as shown
below.
Display Description of function
'Add' Add a break point
Adds a new break-point before the
displayed break-point. The calibration
of existing break-points is not changed,
but the identification number of all
subsequent break-points is increased
by one.
'dEL' Remove a break point
Removes the displayed break-point and
joins the preceding break-point to the
following break-point with a straight
line. The identification number of all
subsequent break-points is decreased
by one.
To add a break-point use the ▲ or ▼ button to
select 'CAL' from the configuration menu and press
P which will result in the 'Add' sub-function prompt
being displayed. To enter the sub-function press P
which will reveal the current break-point and the
total number of break-points which have already
been entered. When adding a break-point the
insertion position can be selected using the ▲ and
▼ push buttons followed by P push button to
insert the additional break-point. In previously
uncalibrated linearisers each new break-point
should be added in front of the highest existing
break-point, if this sequence is not followed a 'FaiL'
message will occur in the 'Pt5' function. See
example in section 7.1.1.
20