Model 580A
21
The last High alarm option to appear on the display is the alarm set point (trip level). If
this level is reached or exceeded, the High alarm outputs activate. The display indicates
the current High alarm set point (
5
to
60
in increments of 5). Press the
Mode
button
repeatedly, until the desired high alarm set point appears on the display. For this
selection the factory default
is
60
. In case of common alarms, this option is available at
the master board only.
NOTE:
The High set point cannot be set lower than the current Low set point. To
accomplish this, you need to go through set-up twice. The Low set point should
be set lower than the desired High set point, then re-enter the Setup mode and
set the High set point.
3.7.3 Low Alarm Options
Next, the
Low
LED flashes while the energized/de-energized option displays. This option
is available only for discrete alarms configuration. The display indicates the current
selection, (
En or dE
). Press the
Mode
button to toggle the selection.
De-Energized (dE)
is the factory default for this selection.
The
Low
LED on the front panel flashes while the latching/non-latching option is
displayed. The display will indicate the current selection, (
nL or LA
). Press the
Mode
button to toggle the selection.
Non-Latching
(nL)
is the factory default for this selection.
The last Low alarm option to appear on the display is the alarm set point (trip level). If this
level is reached or exceeded, the Low alarm outputs activate. The display indicates the
current Low alarm set point. Press the
Mode
button repeatedly, until the desired Low
alarm set point appears on the display (
5
to the
High
set point in increments of 5). The
Low set point cannot be set higher than the High set point. A set point of
30
is the factory
default for this selection. In case of common alarms, this option is available at the master
board only.
3.7.4 Calibration Level Option
After the Low alarm options have been selected, the user chooses the Calibration Level.
This option displays
CL
for 5 seconds, then the current calibration level. The acceptable
range of calibration level, in % LEL (lower explosive limit), is between
25
and
90
,
inclusive. A calibration level of
50
is the factory default for this selection.
3.7.5 Password
Enabled/Disabled
Option
After the Calibration Level option has been selected the Password Enabled/Disabled
option displays. The display indicates the current selection, (
PE or Pd
). Press the
Mode
button to toggle the selection.
Password Disabled (Pd)
is the factory default for this
selection.
If the Password Disabled is selected, the unit returns to normal operation. If this setting is
changed from Password Disabled to Password Enabled, the user enters a new
password. The unit displays the left digit of the existing password (flashing on the
display). The right digit is blank until the left digit has been selected. Press the
Mode
button repeatedly until the desired value displays. Once the left digit is correct, wait for
five seconds and the right digit of the display begins flashing and the left digit is blank.
