BEKA BA537E, Руководство пользователя

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9.4.1 Solid state output
Each alarm has a galvanically isolated single pole
solid state switch output as shown in Fig 10. The
outputs are polarised and current will only flow in one
direction. Terminals A1 and A3 should be connected
to the positive side of the supply.
Ron = less than 5

+ 0.7V
Roff = greater than 1M

Note: Because of the series protection diode some
test meters may not detect a closed alarm
output.
Fig 10 Equivalent circuit of each alarm output
The solid state output of each alarm may be used to
switch any circuit with parameters equal or less than:
V = 30V
I = 200mA
Fig 11 Typical alarm application
9.4.2 Configuration and adjustment
When a BA537E or BA538E is supplied with alarms
the configuration menu is extended as shown in
Fig 12. The alarm functions appear after
clr gtot
,
and each alarm may be configured to operate on the
rate or total display.
For simplicity Fig 12 only shows the configurable
functions on the rate option of alarm AL1, the total
options is identical except that total alarms do not
have hysteresis.
Alarm AL2 is identical to alarm
AL1.
The following table summarises each of the alarm
configuration functions and includes a cross
reference to more detailed information. Again only
the functions on alarm AL1 are listed.
Display Summary of function
EnbL
Alarm enable
Enables or disables the alarm without
changing the alarm parameters.
See section 9.4.3
tYPE
Type of alarm
Defines whether the alarm operates on
the rate or total display.
See section 9.4.4
5P1r
Alarm setpoint 1
or Adjusts the alarm setpoint. The alarm is
5P1t
activated when the rate or total display
equals the setpoint.
Note:
5P1r
is displayed for a rate alarm
and
5P1t
for a total alarm.
See section 9.4.5
HI. LO
Alarm function
Defines whether the alarm has a high or
low function.
See section 9.4.6
no . nc
Normally open or normally closed
output.
Determines whether the single pole
alarm output is open or closed in the
non-alarm condition.
See section 9.4.7
H5tr
Hysteresis
Adjusts the alarm hysteresis. Only
available on a rate alarm.
See section 9.4.8
dELA
Alarm delay time
Adjusts the delay between the display
equaling the setpoint and the alarm
output being activated.
See section 9.4.9
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