BEKA BA354NE User manual

Issue: 3
3rd July 2014
BA354NE
Type nA
4/20mA loop-powered
field mounting
Rate Totaliser
Issue 3

1. Description
2. Operation
2.1 Controls
2.2 Displays
3. Certification
3.1 ATEX Ex nA certification
3.2 Zones, gas groups & T rating
3.3 4/20mA input
3.4 Reset terminals
3.5 Certification label information
4. System Design for Zone 2 Gas
Hazardous Areas
4.1 Transmitter loops
4.2 Remote indication
4.3 Resetting the total display to zero
5. Installation
5.1 Location
5.2 Installation procedure
5.3 EMC
6. Configuration and Calibration
6.1 Calibration structure
6.2 Accessing calibration & configuration
functions.
6.3 Summary of configuration
functions.
6.4 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 calibrator.
6.11 Calibration of rate display using internal
reference.
6.12 Clear grand total
6.13 Timebase
6.14 Function of Ppush button
6.15 Total scale factor
6.16 Clip-off
6.17 Local reset of total & grans total displays.
6.18 Security code
6.19 Reset to factoty defaults
6.20 Over-range
7. Lineariser
7.1 Lineariser calibration using an external
current source.
7.1.1 Example, Adding break-points
to a new indicator
7.2 Lineariser calibration using internal
reference.
7.2.1 Example, Adding break-points
to a new indicator
7.3 Lineariser error message
7.4 Under and over-range
7.5 Lineariser 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
9.4 Routine maintenance
9.5 Guarantee
9.6 Customer comments
10. Accessories
10.1 External keypad
10.2 Units of measurement and instrument
identification.
10.3 Alarms
10.3.1 Solid state output
10.3.2 Type nA certification
10.3.3 Configuration and adjustment.
10.3.4 Alarm enable
10.3.5 Type of alarm
10.3.6 Setpoint adjustment
10.3.7 Alarm function
10.3.8 Alarm output status
10.3.9 Hysteresis
10.3.10 Alarm delay
10.3.11 Alarm silence time
10.3.12 Flash display when alarm
occurs.
10.3.13 Acess setpoint in the display
mode.
10.3.14 Adjusting alarm setpoints from
display mode.
10.4 Display backlight
10.4.1 Loop powering the backlight
10.4.2 Separately powering the
backlight.
10.5 Pipe mounting kits
Appendix 1 ATEX dust certification
Appendix 2 IECEx certification
2
The BA354NE is CE marked to show compliance with the European Explosive Atmospheres Directive 94/9/EC and
the European EMC Directive 2004/108/EC
CONTENTS

1. DESCRIPTION
The BA354NE is a Type nA certified 4/20mA 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. It is
loop powered but only introduce a 1.2V drop, which
allows it to be installed into almost any 4/20mA
current loop. No additional power supply or battery
is required.
The Rate Totaliser has been issued with an Ex nA
and Ex tc Type Examination Certificate by Notified
Body Intertek Testing and Certification Ltd which has
been used to confirm compliance with the European
ATEX Directive 94/9/EC.
The main section of this manual describes
application ins gas hazardous areas, applications in
combustible dust atmospheres are described in
Appendix 1.
For international applications the BA354NE has
IECEx certification which is described in Appendix 2.
Housed in a robust IP66 glass reinforced polyester
(GRP) enclosure with an armoured glass window,
the BA354NE 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
BA354NE Rate Totaliser. The 4/20mA 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 4/20mA input current, provides
the input signal for the analogue to digital converter.
Each time a 4/20mA 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.
Fig 1 Simplified block diagram of BA354NE
2.1 Controls
The BA354NE 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 4mA
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 –
displays most significant 8 digits.
▼+▲Resets total display
Configurable function
P+▼Shows 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 4mA*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 Ewill 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 the 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 ‘ACSP’
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 4 and 20mA.
2.2 Displays
The BA354NE 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 4.000mA, indic
a
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.
4

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. CERTIFICATION
The BA354NE Rate Totaliser has ATEX and IECEx
gas and dust certification. This section of the
instruction manual describes ATEX gas certification.
ATEX dust approval is described in Appendix 1 and
IECEx certification in Appendix 2.
3.1 ATEX Ex nA certification
Notified Body Intertek Testing and Certification Ltd
have issued a Type Examination Certificate number
ITS11ATEX47255 for the BA354NE. This has been
used to confirm compliance with the European
ATEX Directive for Group II, Category 3GD
equipment. 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 EN60079-14 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 Rate Totaliser has been certified as Group II
Category 3G Ex nA ic IIC T5 Gc apparatus with a Ta
of –40ºC to +70ºC. This is non-sparking apparatus
complying with EN 60079-15 that minimises the risk
of arcs or sparks capable of creating an ignition
hazard occurring during conditions of normal
operation.
The IEC guidance on maintenance procedures IEC
60079-17 permits live maintenance in Zone 2 if a
risk analysis demonstrates that this does not
introduce an unacceptable risk. The removal of
covers is permitted if this can be done without
contaminating the interior of the instrument with dust
or moisture. Since the relevant circuits are ‘ic’ [as
indicated by the certificate] the adjustment and
calibration procedures listed in this document may
be carried out in Zone 2 or 22. Some end-users
may prefer not to permit live maintenance to
minimise risk.
When connected to a suitable system the BA354NE
may be:
Installed in:
Zone 2 explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
5

Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1 450ºC
T2 300ºC
T3 200ºC
T4 135ºC
T5 100ºC
At ambient temperatures between -40 and +70ºC.
Note: The specified operating temperature is –20 to
+70ºC. At temperatures below –20ºC the instrument
will continue to totalise but the display will not
function.
This allows use with all industrial gases except
carbon disulphide CS2.
3.3 4/20mA input
The input safety parameter for the 4/20mA input,
terminals 1 and 3 is:
Ii = 100mA
The Rate Totaliser is a current input instrument
incorporating an internal protection circuit that
defines the voltage developed between the input
terminals 1 and 3, therefore the ATEX certificate
does not specify a maximum safety input voltage Ui.
3.4 Reset terminals
The input safety parameter for the reset terminal,
RS1 and RS2 is:
Ui = 4.3V
This allows the reset terminals to be connected to a
voltage free push button contact or to a solid state
switch activated by a supply of up to 4.3V.
3.5 Certification label information
The certification 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 manufacture
are recorded on a separate label inside the terminal
compartment.
BA354NE certification label
6

4. SYSTEM DESIGN FOR ZONE 2 GAS
HAZARDOUS AREAS
4.1 Transmitter loops
The BA354NE Rate Totaliser may be connected in
series with almost any Ex n*protected 4/20mA flow
loop and calibrated to display the rate of flow and
total flow in engineering units. There are four
design requirements:
1. The current flowing in the 4/20mA loop, must
not exceed 100mA in normal operation.
2. Wiring must comply with Clause 9 of
EN60079-14 Electrical installation in
hazardous areas.
3. The instrument enclosure must be fitted with
Ex n or Ex e certified glands, conduit fittings or
blanking plugs.
4. The loop must be able to tolerate the additional
1.2V required to operate the Rate Totaliser.
This increases to 5.0V if the Rate Totaliser is
fitted with an optional backlight which is loop
powered. See 10.4.1
* May also be connected into Ex e, Ex d or Ex p
4/20mA loops. see BEKA application note
AG310.
Figs 2 illustrate a typical application in which a
BA354NE Rate Totaliser is connected in series with
a 2-wire Ex n flow transmitter.
Fig 2 Typical Zone 2 transmitter loop
To strictly comply with the requirements of
EN60079:14 Electrical installations design, selection
and erection, each of the wires entering the
hazardous area should be individually fused and
contain a means of isolation. However, in practice
instrumentation energised by a current limited power
supply or instrument that can be switched off is often
considered adequate.
4.2 Remote indication
The BA354NE Rate Totaliser may be driven directly
from a safe area instrument with a 4/20mA output to
provide a remote display within a Zone 2 hazardous
area.
There are four design requirements:
1. The current flowing in the 4/20mA loop, must
not exceed 100mA in normal operation.
2. Wiring must comply with Clause 9 of
EN60079-14 Electrical installation in
hazardous areas.
3. The instrument enclosure must be fitted with
Ex n or Ex e certified glands, conduit fittings or
blanking plugs.
3. The 4/20mA output from the safe area
instrument must be able to supply the 1.2V
required to operate the Rate Totaliser. This
increases to 5.0V if the Rate Totaliser includes
an optional backlight which is loop powered.
See10.4.1 Fig 3 shows a typical
application.
Fig 3 Remote indication in Zone 2 hazardous area
To strictly comply with the requirements of
EN60079:14 Electrical Installation in Hazardous
Areas, each of the wires entering the hazardous
area should be individually fused and contain a
means of isolation. However, in practice
instrumentation energised by a current limited power
supply or instrument that can be switched off is often
considered adequate.
7

4.3 Resetting the total display to zero
The BA354NE 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 BA354NE is
located this may be achieved with a manually
activated industrial push button as shown in Fig 2.
The push button switch and the wiring connecting it
to the Rate Totaliser must be able to withstand a
500V rms insulation test for one minute. The switch
button must comply with the electrostatic
requirements specified by Clause 7 of EN60079-0
and material composition defined in Clause 8.
If the totaliser is to be reset by a manually activated
contact closure in the safe area, 100mA fuses
mounted in isolating terminals should be connected
into each of the reset wires as shown in Fig 3.
Again the wiring must be able to withstand a 500V
rms insulation test for one minute, but any
mechanically actived push button switch may be
used.
Note:
The BA354NE negative reset terminal RS2 is
internally connected to the negative 4/20mA
input terminal 3.
8

5. INSTALLATION
5.1 Location
The BA354NE Rate Totaliser is housed in a robust
IP66 glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings suitable for exterior mounting
in industrial installations at ambient temperatures
between -20 and +70ºC. The instrument will
continue to totalise and has been certified at -40ºC,
but the display ceases to function delow -20ºC. The
BA354NE should be positioned where the display is
not in continous direct sunlight.
The BA354NE 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 4 are internally joined and may be
used for linking the return 4/20mA 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 4 illustrates the 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
Ex n or Ex e cable gland or conduit fitting. If
more than one entry is required, one or both of
the Ex e stopping plugs may be replaced with
an Ex n or Ex e cable gland or conduit fitting.
4. 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 4 BA354NE installation procedure
Fig 5 Dimensions and terminal connections
5.3 EMC
The BA354NE Rate Totaliser complies with the
requirements of the European EMC Directive
2004/108/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 BA354NE 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 10.3 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 BA354NE calibration structure. The
4/20mA 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 4mA) and the span (display at 20mA) are
adjustable, although for unidirectional flow
application the display at 4mA is usually zero. The
position of the decimal point in the rate display is
defined by the ‘dP’ function. To simplify calibration
the BA354NE 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 4mA.
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 BA354NE 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 BA354NE is displaying rate in litres
per minute, setting '5CALE-t' to 4.5461 produces a
total display in UK gallons. Alternatively, setting
'5CALE-t' to 4546.1 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 Pand Epush 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 Pbutton
will clear this prompt allowing each digit of the code
to be entered using the ▲and ▼push buttons and
the Pbutton to move control to the next digit. When
the correct four digit code has been entered
pressing Ewill 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 4mA ‘Zero’ 0.00
Rate display at 20mA ‘5PAn’ 100.00
Resolution ‘rE5n’ 1 digit
Pbutton 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 10.3 of this manual.
Display Summary of function
'FunC' Rate Totaliser function
Defines the relationship between the
4/20mA 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 6.4
'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’, ‘4’ 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 4/20mA 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 4/20mA input when
the Ppush button is operated in the
display mode.
Select:
‘PC’ % of 4/20mA input
‘4-20’ Current in mA
Note: ‘PC’ is not available with
lineariser.
See section 6.14
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
5CALE-t = Units of rate display
Units of total display
To calculate 5CALE-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 Eand ▲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

14

6.4 Rate Totaliser function: ‘FunC’
This configuration function defines the relationship
between the Rate Totaliser’s 4/20mA 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 Eto return to
the menu, or press the ▲or ▼button to change the
setting, followed by the Ebutton to return to the
configuration menu.
‘5td’ Linear
Provides a linear relationship between the
4/20mA Rate Totaliser input current and the
instruments rate display for uni-
directional flow.
‘root’ Square root extraction
Primarily intended to linearise the square
law 4/20mA 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 4.01
10.0 4.16
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
4/20mA 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 Pwhich 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 Ebutton 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, 4
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 Eto return to the
menu, or press the ▲or ▼button to change the
time, followed by the Ebutton 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 Eto return to the configuration
menu, or press the ▲or ▼button to toggle the
function between ‘totAL’ and ‘rAtE’. When set as
required press Eto 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 Eto return to the configuration menu, or press
the ▲or ▼button to toggle the function between
‘on’ and ‘oFF’. When set as required press Eto
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 BA354NE 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 Pbutton 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 Ebutton.
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 4mA input
Span rate display with 20mA input
To calibrate the rate display select 'CAL' from the
configuration menu and press P. The BA354NE will
display 'ZEro' which is a request for a 4mA input
current. Adjust the external current calibrator to
4.000mA 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 Pwill
transfer control to the next digit. When all the digits
have been adjusted, press Eto enter the new zero
and return to the 'ZEro' prompt .
Pressing the ▲button will cause the BA354NE 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 Pwill 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 4 and 20mA, within the range 3.8 to
21.0mA providing the difference between the
two currents is greater than 4mA. 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.
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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
4/20mA input current, or to disconnect the BA354NE
Rate Totaliser from the 4/20mA loop.
When using the ‘5Et’ function the instrument’s
internal reference is used to simulate a 4mA and
20mA input current.
Zero rate display with a simulated 4mA 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 Pagain will reveal the
current rate display at 4mA. The flashing digit can
be adjusted by pressing the ▲or ▼buttons, when
set as required pressing Pwill transfer control to the
next digit. When all the digits have been adjusted,
press Eto 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 Pwill then reveal the existing rate
display at 20mA. The flashing digit can be adjusted
by pressing the ▲or ▼buttons, when set as
required pressing Pwill transfer control to the next
digit. When all the digits have been adjusted press
Etwice 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
1234567890123456 12345678 90123456
-1234 -1234
-12345678 - 12345678
-1234567890 -12 32567890
-123456789012345 -1234567 89012345
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 BA354NE 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 Pwhich will
reveal the current setting. Pressing the ▼or ▲
button will index though the following three options.
BA354NE
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 Eto return
to the ‘t-bA5E’ prompt in the configuration menu.
6.14 Function of the Ppush-button: ‘C - - P’
When the Rate Totaliser is in the operating mode,
operating the Ppush 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 4mA and 20mA inputs.
To check or change the function of the Ppush
button select 'C - -P' from the configuration menu
and press Pto reveal the current setting. Pressing
the ▲or ▼button will toggle the setting between '4-
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 6.4.
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 BA354NE rate display represents litres per
second but the total flow display is required in UK
gallons. There are 4.5461 litres in a UK gallon.
5CALE-t = Units of rate display
Units of total display
= 1 litre
1 gallon
= 1 litre
1 / 4.5461 litres
5CALE-t = 4.5461
Alternatively, if the total display is required in
thousand of UK gallons
= 1 litre
1 / 4546.1 litres
5CALE-t = 4546.1
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 Pwill transfer control
to the next digit, which may be adjusted in the same
way.
To position the decimal point, repeatedly operate the
Pbutton 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 BA354NE 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 Pto 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
Pwill 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 4mA.
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 BA354NE 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 Pwhich will reveal if the function is turned
'on' or 'oFF'. Operating the ▼or ▲button will
toggle the display between the two conditions.
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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 4.2 of this manual is not
affected by the status of this local reset function.
When enabled, ‘Gt-rE5Et’ allows an operator to
reset the BA354NE grand total to zero by operating
the Eand ▲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 Pwhich 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 Pwhich 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 Pbutton will transfer
control to the next digit. When all the digits have
been adjusted press Eto 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 Pto transfer control to the second
digit which should be set to ‘u’. When ‘5urE’ has
been entered pressing the Ebutton 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 BA354NE 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.
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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
Pwhich 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 Ppush 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