Alarm Display - Hach 8000A Manuel D'utilisation

Option Description
Rate alarm The frequency, in counts per minute, at which the system
limit checks the input pulse rate during a sample run-0 to 999999.
For values above 1000, the rate is measured once every three
seconds. After an alarm is triggered, the rate is measured once
per second until the alarm is reset.
For values equal to or less than 1000, the rate is measured
every 60 seconds. After an alarm is triggered, the rate is
measured every 20 seconds until the alarm is reset.
Push [.] to disable the alarm.
> Alarm Enter a value between 0 and 9999999. This alarm is measured
limit at the end of each sample run. The alarm stays set until the
end of the next sample run. The alarm is set if the counts are
less than or equal to the limit or until it is disabled by the
operator. Push [.] to disable the alarm.
< Alarm Enter a value between 0 and 9999999. This alarm is measured
limit at the end of each sample run. The alarm is reset if the counts
are greater than or equal to the limit or until it is disabled by the
operator. Push [.] to disable the alarm.
Alarm If this function is activated, sample run data is sent to the
print printer after runs which make an alarm turn on. The data is not
sent to the printer after runs that do not turn on any alarms.
This is true even if automatic printing of run data has been
enabled with the AUTO PRINT soft key function. The alarm
print feature does not affect printing of averaged data after a
multiple run cycle.
About the instrument relay
In the deactivated state, Terminal 1 on the rear of the instrument is
normally open (NO). Terminal 3 is normally closed (NC). In response to
an alarm condition (unless the alarm relay is disabled), Terminal
1 closes and Terminal 3 opens. The relay stays closed as long as the
alarm condition exists. The relay can be disabled through the SET
ALRMS function.

Alarm display

Alarm conditions are displayed in the error display line of the instrument
display or on printed results. The display shows alarms in abbreviated
form as in the example.
ALARM EXAMPLE: 1[R><] 2[R<] 4[R]
This display shows that:
• Counter 1 shows all three alarm conditions (Rate, Greater Than and
Less Than)
• Counter 2 shows Rate and Less Than alarms
• Counter 3 shows no alarms
• Counter 4 shows only the Rate alarm
Alarm printouts
Alarm printouts show counter alarms individually. If automatic printing is
activated for a counter, the alarm conditions are printed as they occur.
When sample run data is printed, the pass and fail status of each
activated alarm is printed after the data.
If the rate alarm is activated in a sample run, the run fails the rate alarm
test. Even though the alarm condition may have reset before the end of
the run, the alarm status line will show Rate fail. However, the rate
alarm condition may not show in the display and the alarm relay may be
open.
Host setup
Host Setup sets up the way data is sent to a host computer.
1. In the Miscellaneous Functions menu, push HOST SETUP.
The Host Setup screen appears.
2. Change the entries if necessary. Push ENTER to confirm.
Option Description
Host interface Activates or Inactivates data transmission
Report runs Select whether or not run information is sent to the host
computer.
Report Select whether or not run average information is sent to
averages the host computer.
Report format Select a long or short format for the run and average data
that is sent to the host computer.
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