BEKA BA364G, Руководство пользователя

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1. DESCRIPTION
This rugged Ex nA and Ex tc certified, one input
Counter may be configured to count input pulses
from a wide variety of sensors in a Zone 2 or
Zone 22 hazardous area. without the need for Zener
barriers or galvanic isolators. The total number of
pulses and their rate may be displayed in the same
or different engineering units.
This instruction manual supplements the abbreviated
instruction sheet supplied with each instrument.
The BA367NE has been issued with a Type
Examination Certificate ITS16ATEX48409X by
Notified Body Intertek Testing and Certification Ltd.
This confirms compliance with the type of protection
requirements for non-sparking Ex nA apparatus, and
for dust ignition protection by enclosure Ex tc. This
certificate has been used to confirm compliance with
the European ATEX Directive 2014/34/EU.
For international applications the BA367NE also has
IECEx certification which is described in Appendix 2.
For applications in the USA and Canada the
BA367NE has ETL and cETL certification which is
described in Appendix 3.
2. OPERATION
Fig 1 shows a simplified block diagram of the
BA367NE Counter. The instrument can be supplied
with a factory fitted internally powered display
backlight, plus one of the following three factory
fitted accessories:
Dual isolated alarms
or Isolated pulse output
or Isolated 4/20mA output
Fig 1 BA367NE block diagram
2.1 Initialisation
Each time power is applied to a BA367NE Counter
initialisation is performed. After a short delay the
following display sequence occurs:
All segments of the display are activated
Counter starts functioning, using the
configuration information stored in the
instrument’s permanent memory. Unless
total and grand total displays have been reset
to zero, new pulses will be added to the
existing totals.
2.2 Controls
The BA367NE Counter is controlled and configured
via four front panel push buttons. In the display
mode i.e. when the instrument is counting the push
button functions are:
Push Button Functions
(
+
)
Access to configuration menu
&
+
*
If Local Total Reset
CLr tot
in the
instrument configuration menu has
been activated, operating the
&
and
*
buttons simultaneously for three
seconds will reset the total display to
zero and clear any pulses stored in the
optional pulse output.
See 6.19
)
+
&
Grand total - shows
Lo
followed by least
significant 8 digits of the 16 digit grand
total.
)
+
*
Grand total - shows
Hi
followed by the
most significant 8 digits of the 16 digit
grand total.
If Local Grand Total Reset
CLr Gtot
in
the instrument configuration menu has
been activated, operating the
)
and
*
buttons simultaneously for ten
seconds will result in
Clr . no
being
displayed with the
no
flashing.
Operating the
*
or
&
button will
change the display to
Clr . YE5
, the
)
button will then reset the grand total to
zero which will be confirmed by a brief
display of
Gt Clrd
. See 6.20
(
+
&
Shows firmware version
Note : When optional alarms are fitted, the
BA367NE Counter may be configured to provide
direct access to the alarm setpoints from the display
mode when the
(
+
*
buttons are operated
simultaneously. See 9.3.13 and 9.3.14
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