BEKA BA369 User manual

Instruction sheet for BA369
Intrinsically safe battery powered clock
1. INTRODUCTION
The BA369 is an intrinsically safe, battery powered digital clock which can
display local time in a hazardous area. It is a self contained panel
mounting instrument with a selectable twelve or twenty four hour display.
All controls are located on the front panel and may be protected by a
security code to prevent unauthorised adjustment.
If required the display may be synchronised to a master clock via a simple
external contact closure.
The BA369 clock is ATEX certified Group II Category 1G, EEx ia IIC T5
allowing installation in all Zones and use with most hazardous gases.
2. INTRINSIC SAFETY CERTIFICATION
2.1 ATEX certificate
The BA369 clock has been issued with EC-Type Examination Certificate
number ITS02ATEX2017 by Notified Body Intertek Testing Services (ITS)
confirming compliance with the European ATEX Directive 94/9/EC for
Group II, Category 1, gas atmospheres, EEx ia IIC T5. The instrument
bears the Community Mark and, subject to local codes of practice, may be
installed in any of the European Economic Area (EEA) member countries.
i.e. Austria, Belgium, Denmark, Finland, France, Germany, Greece,
Ireland, Italy, Luxembourg, Norway, The Netherlands, Portugal, Spain,
Sweden and the United Kingdom. ATEX certificates are also accepted in
Iceland, Liechtenstein, Switzerland and the Czech Republic.
This instruction sheet describes installations which conform with BS
EN60079:Part 14 Electrical Installation in Hazardous Areas. When
designing systems for installation outside the UK, the local Code of
Practice should be consulted.
2.2 Zones, Gas Groups and T rating
The BA369 clock has been certified EEx ia IIC T5 and 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, it will only exist for a short time.
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
Although certified intrinsically safe at ambient temperatures between –40
and +50ºC the guaranteed operating temperature range of the clock is
–20 to +50ºC. WARNING installation in Zone 0
When installed in a Zone 0 potentially explosive atmosphere
requiring apparatus of Category 1G, the clock shall be installed
such that even in the event of rare incidents, an ignition source
due to impact or friction between the aluminium enclosure at the
rear of the instrument mounting panel and iron/steel is excluded.
2.3 Internal battery
The BA369 is powered by a replaceable intrinsically safe battery which will
operate the clock for at least two years. A replacement intrinsically safe
battery may be installed while the clock is mounted within the hazardous
area. See section 6.1 for detailed instructions.
2.4 Synchronising terminals
Connecting terminals 1 and 2 together will stop the clock. When the
terminals are disconnected the clock will re-start from a new time selected
in the programme menu. This may be the nearest minute or the nearest
hour to the original display, or a preset time may be entered during
programming. This function allows a BA369 clock to to be synchronised
with a master clock.
In addition to the EC-Type Examination Certificate, ITS have issued two
System Certificates illustrating how the synchronising terminals of up to
ten BA369 clocks may be interconnected within the hazardous area.
These certificates are only for guidance and are not part of the BA369
ATEX certification.
Fig 1 shows how up to ten BA369 clocks may be synchronised by a
mechanically operated hazardous area switch. Any switch may be used
providing it has IP20 protection and will withstand a 500V rms insulation
test for one minute.
Fig 1 Synchronising display from hazardous area
If the synchronising switch is located in the safe area, the contact closure
must be transferred to the hazardous area via a certified intrinsically safe
Zener barrier or galvanic isolator. Any single channel Zener barrier
certified EEx ia by a European Notified Body may be used providing its
safety output parameters do not exceed:
Uo = 10V dc
Io = 200mA dc
Po = 0.7W
To synchronise up to ten clocks the ‘on’ resistance of the switch plus the
end-to-end resistance of the Zener barrier must be less than 500and the
‘off’ resistance must be greater than 30k. See Fig. 2 and System
Certificate Ex02E2018.
Fig 2 Synchronising display from safe area via Zener barrier
As shown in Fig 3 a galvanic isolator or intrinsically safe relay may also be
used to transfer the synchronising switch contact closure into the
hazardous area. System Certificate Ex02E2019 lists some suitable
devices, but others may be used.
The BA369C clock is CE marked to show compliance with the
European Explosive Atmospheres Directive 94/9/EC and the
European EMC Directive 2004/108/EC
BEKA associates Ltd, Old Charlton Road, Hitchin, Herts. UK SG5 2DA. Tel: [phone] www.beka.co.uk

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Fig 3 Synchronising display from safe area via galvanic isolator
2.5 Certification label information
The certification information label is fitted on the top of the clock. It shows
the model number, ATEX certification information, BEKA associates
address, the year of manufacture and the clock serial number.
Fig 4 Label
3. INSTALLATION
3.1 Location
The BA369 clock is housed in a robust aluminium enclosure with a Noryl
bezel and elastomeric keypads. The front of the instrument provides IP65
protection and a gasket seals the joint between the instrument enclosure
and the panel. The clock may be installed in any panel providing the
environmental limits shown in the specification are not exceeded. Please
consult BEKA associates if high vibration is anticipated.
Fig 5 shows the overall dimensions of the BA369 and the required panel
cut-out. To achieve an IP65 seal between the clock enclosure and the
panel the smaller cut-out must be used and the clock secured with four
panel mounting clips.
Fig 5 BA369 dimensions
3.2 Installation Procedure
a. Insert the BA369 into the instrument panel cut-out from the front
of the panel.
b. Fix panel mounting clips to opposite sides of the instrument and
tighten until the instrument is secure as shown in Fig 6. Four
clips are required to achieve an IP65 seal between the
instrument enclosure and the panel.
c. For personnel safety connect the case terminal at the rear of the
instrument to a local earth.
d. If the synchronising facility is being used connect the panel
wiring to the rear terminal block as shown in Figs 1, 2 or 3. To
simplify installation, the terminal block is removable so that
panel wiring can be completed before the instrument is installed.
e. To extend battery life, when delivered the clock will be switched
off. To activate, press the lower left hand button for about three
seconds which will result in a flashing display indicating that
time and date should be entered. If a time is not entered within
five minutes, the clock will automatically switch off.
3.3 EMC
The BA369 complies with the requirements of the European EMC
Directive 2004/108/EC. For specified immunity the synchonising wiring
should be in screened twisted pairs.
To prevent circulating currents, cable screens should only be earthed at
one point in the safe area.
Fig 6 Installation and terminal connections
4. ADJUSTMENT & PROGRAMMING
The BA369 clock is adjusted and programmed via the front panel push-
buttons. In normal operation these buttons have the following functions:
Description of push-button functions
Lower Operating this button for about 3 seconds turns
left hand the BA396 clock on.
button
P + E Operating these buttons simultaneously will enter the
programme menu shown in Fig 7 which allows the display
format, time and date to be entered.
Up While this button is operated the display will show
seconds.
Down While this button is operated the display will show the
date.
4.1 Programme functions
Throughout these instructions push-buttons are shown in italics e.g. P or
Up push-button and legends displayed by the clock are shown within
inverted commas e.g. 'dAtE' and 'rSEt'.
Access to the programme menu is obtained by operating the Pand E
push-buttons simultaneously. If the clock is not protected by a security
code the first parameter 'SEt' will be displayed. If a security code other
than the default code 0000 has already been entered, the clock will
display 'COdE'. Press Pto clear this prompt and enter the security code
for the clock using the Up or Down push-buttons to adjust each digit, and
the P push-button to move control to the next digit. If the correct code
has been entered pressing Ewill then cause the first parameter 'SEt' to be
displayed. If an incorrect code is entered, or a push-button is not
operated within five minutes, the clock will automatically return to the
display mode.
Fig 7 shows the programme menu illustrating how to navigate between
functions. A detailed description of each function is contained in the
following sections.

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4.2 Set displayed time: ‘SEt’
This function enables the clock display time to be set. Using the Up or
Down button select the ‘SEt’ function from the programme menu and
press P. This will reveal the current clock time with one digit flashing.
The flashing digit can be adjusted using the Up and Down buttons,
pressing P will transfer control to the next digit. When the displayed time
is set as required, press Eto start the clock and return to the programme
menu.
Note: SEt time is always entered in 24 hour format.
4.3 Set date: ‘dAtE’
The date is entered in day : month format i.e. 11th December is entered
as ’11:12’. Select ‘dAtE’ from the programme menu and press Pwhich
will show the current setting with one digit flashing. The flashing digit can
be adjusted using the Up and Down buttons and the Pbutton to transfer
control to the next digit. When the current date has been entered press E
to return to the programme menu.
4.4 Set year: ‘YEAr’
The year is entered as two digits i.e. 2002 is entered as ‘02’. Select
‘YEAr’ from the programme menu and press Pwhich will show the current
setting with one digit flashing. The flashing digit can be adjusted using the
Up and Down buttons, pressing the Pbutton will transfer control to the
other digit. When the current year has been entered press Eto return to
the programme menu.
4.5 Select 12 or 24 hour display: ‘24:12’
A 12 or 24 hour display format may be selected. Using the Up and Down
button select the ’24:12’ function from the programme menu and press the
Pbutton. This will reveal the current format which may be changed by
operating the Up or Down button. When set as required press Eto
return to the programme menu.
4.6 Select synchronisation: ‘SYnC’
Connecting the synchronising terminals together will stop the clock. When
the terminals are disconnected the clock will restart from one of three new
times defined by this function. This function also enables the
synchronising terminals to be disabled.
Restarting from the nearest minute or the nearest hour to the original
displayed time allows a small correction to be made to compensate for
running errors. Restarting the clock from the reset time defined by the
rSEt function is useful when displaying elapsed time.
To check or change the synchronisation select ’SYnC’ from the
programme menu and press Pwhich will show the current setting.
Pressing the Up or Down buttons will scroll through the four options:
hh : -- Display changes to the nearest hour
-- : nn Display changes to the nearest minute
hh : nn Display changes to the ‘rSEt’ time – see 4.7
OFF Synchronisation terminals are disabled. When the
required option is displayed, press Eto return to the programme menu.
4.7 Set synchronisation time: ‘rSEt’
This function defines the time to which the display is set when ‘hh:nn’ is
selected in the ‘SynC’ function. – see 4.6
Using the Up and Down buttons select the ‘rSEt’ function from the
programme menu and press the Pbutton. This will reveal the
synchronisation time with one digit flashing. The flashing digit can be
adjusted using the Up and Down buttons, pressing the Pbutton will
transfer control to the next digit. When the synchronisation time is set as
required press Eto return to the programme menu.
Note: rSEt time is always entered in 24 hour format.

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4.8 Select automatic daylight saving: ‘dS’
Daylight saving automatically advances the displayed time by one hour on
the EEU agreed date in March and retards it by one hour in October.
Using the Up and Down button select the ’dS’ function from the
programme menu and press P. This will reveal if daylight saving is ‘On’ or
‘OFF’. Operating the Up or Down button will toggle between the two
options. When set as required press Eto return to the programme
menu.
4.9 Turn clock off: ‘P.dn’
To extend battery life the clock may be switched off when not in use. All
settings apart from the time and date will be stored in permanent memory.
Select ‘P.dn’ from the programme menu and press Pwhich will result in a
‘0000’ prompt with the first digit flashing. To confirm the instruction enter
the password ‘SurE’ using the Up and Down button to set each digit and
the Pbutton to transfer control to the next digit. S is entered as 5. When
‘SurE’ is displayed, pressing Ewill turn the clock off.
4.10 Define security code: COdE
Access to the programme menu may be protected by a user selectable
four digit numeric security code. New clocks are programmed with the
default security code 0000 which allows unrestricted access without
entering a code.
To enter a new security code select ‘COdE’ from the menu and press P
which will result in the existing security code being displayed with one digit
flashing. Each digit can be changed using the Up and Down buttons and
the Pbutton to move to the next digit. When the required code has been
entered, press Eto return to the programme menu. The revised security
code will be activated when the clock is returned to the display mode.
If the security code is lost, access to the programme menu can be
obtained by moving the internal security link to the override position as
shown in Fig 8. Access to this link is obtained by removing the clock rear
panel as shown in Fig 9. The security code can then be viewed by
selecting ‘CodE’ from the programme menu and pressing P.
Fig 8 Location of security override link
5. ACCESSORIES
5.1 Tag number
The BA369 clock can be supplied identified by a tag number thermally
printed on a self adhesive label.
6. MAINTENANCE
The clock should be regularly inspected to ensure that it has not been
damaged. Frequency of inspections depends upon environmental
conditions, but initially we recommend that this should be done annually.
WARNING
No attempt should be made to repair a faulty BA369
clock. Suspect clocks must be returned to BEKA
associates or to your local agent for repair.
6.1 Installing a replacement battery
The internal intrinsically safe battery will power the BA369 clock
continuously for at least two years, when the battery requires replacing the
display digits will flash, after which the clock will continue to operate for
about five hundred hours before automatically switching off.
BA491 replacement battery units are available from BEKA associates and
our agents. At 20oC replacement batteries only lose about one percent of
their charge each year, so it is practical to stock a spare on-site but they
must be conditioned before installation in the BA369 clock otherwise the
clock may not start. See instructions supplied with BA491 battrey.
WARNING
To maintain the BA369 ATEX certification only a BEKA
BA491 component certified battery should be installed in
the clock. No attempt should be made to recharge or to
open the battery assembly
The discharged battery may be removed and the replacement fitted while
the BA369 clock is installed in the hazardous area. Fig 9 illustrates the
replacement sequence.
a. Remove the synchronising terminals from rear of the clock by
gently pulling.
b. Remove the six screws securing the rear panel and lift it off.
c. Gently pull out the horizontal printed circuit board.
d. Remove the two screws securing the BA491 battery and un-plug
the assembly.
e. Condition the new BA491 battery as described in the
instructions supplied with the battery. Install the new battery
in the clock and replace the printed circuit board enclosure,
ensuring that connectors are correctly aligned. Refit the rear
panel and synchronising terminals.
f. Finally turn the clock on as described in 3.2 (e) and set the
displayed time and date. All other parameters will remain
unchanged
Fig 9 Replacement of internal battery
6.2 Disposal of used batteries
The BEKA BA491 battery contains Lithium Thionyl Chloride cells which
should not be included with standard industrial waste. Do not incinerate.
More information on disposal is available from The British Battery
Manufacturers Association www.rebat.com
7. GUARANTEE
Clocks which fail within the guarantee period should be returned to BEKA
associates or our local agent. It is helpful if a brief description of the fault
symptoms is provided.
8. CUSTOMER COMMENTS
BEKA associates are always pleased to receive comments from
customers about our products and services. All communications are
acknowledged and whenever possible, suggestions are implemented.
Issue 5 9th December 2011