BEKA BA364G, Руководство пользователя

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To adjust an alarm setpoint select
5P1
x or
5P2
x and
press
(
which will reveal the existing value. The
flashing digit of the setpoint may be adjusted using
the
&
or
*
push button and the
(
button to
move control to the next digit. When the required
setpoint has been entered, pressing
)
will return
the display to the
5P1
x or
5P2
x prompt from which
the other setpoint may be selected, or the instrument
may be returned to the totalisation mode by pressing
)
again.
Note: Direct access to the alarm setpoints is only
available when the menu is enabled - see
section 9.3.13
9.4 Pulse output
The BA367NE can be supplied with a factory fitted
isolated pulse output for retransmitting pulses to
other instruments.
Note: Only one of the three output options can be
fitted to a BA367NE Counter.
The pulse output is an open collector with the
following parameters:
Ron = 60

+ 3V
Roff = 1M
I max = 10mA
To retransmit a pulse to another BA367NE Counter
the pulse output terminals may be directly connected
to the input terminals of the second instrument as
shown in Fig 16, alternatively the second instrument
may be located in the safe area. The second
Counter should be configured for an open collector
input.
Fig 16 Pulse retransmission to another BEKA 'E'
Ex nA instrument.
A voltage output pulse can be generated as shown
in Fig 17. The current flowing in the pulse output
circuit, which is defined by resistor R1, should be
less than 10mA. With a 24V supply R1 should
therefore be 2,200

or greater.
The output pulse may be a synchronous duplicate of
the input pulse for re-transmission applications, or
the frequency may be divided and the pulse width
defined.
The retransmitted RTx annunciator on the
instrument display shows the status of the
retransmitted pulse output. Annunciator activation
depends upon the setting of
5ource
in the pulse
output configuration menu.
5caled:
Annunciator activated each time pulse output
open collector is
on , i.e. Ron is less than
60 Ω + 3V.
direct:
Annunciator continuously activated
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