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Alarms and Alerts
Three sets of alarm contacts are supplied through relays on the main CPU board: the system alarm, the concen-
tration alert, and the range alert. The system alarm is discussed in detail in the Troubleshooting & Maintenance
section ((Chapter 6):) of this manual.
The concentration alert can be linked to any two separate system parameters including moisture concentration,
cell temperature, cell frequency, and ∆frequency. The alert is activated when the indicated value for either one
of the parameters linked to the alert exceeds the user specified limits for the parameter. Refer to (Chapter 5):
Alarm Flags for more information on linking system parameters to the concentration alert.
The range alert indicates when the range on analog output 1 shifts from the low to high range or from the high
to low range. Refer to (Chapter 4): Analog Ranges for more information on output ranges.
NOTE
Alarm Button
ALARM
To access the Alarm Menu, press the
highlighted and press
enter
View Alarm Levels
Alter Alarm Levels
NOTE
Alarm levels to be viewed or altered are:
Alarm_1_Hi The upper limit of the concentration alert for the parameter assigned to Alarm_1_Flag.
If the system value linked to the alarm exceeds this value, the alert will be activated.
Alarm_2_Hi The upper limit of the concentration alert for the parameter assigned to Alarm_2_Flag.
If the system value linked to the alarm exceeds this value, the alert will be activated.
4-6 2850 Moisture Analyzer
If not being used for its primary function, either the concentration or range alert
can be configured to provide a "data valid" signal to the user recording equipment.
When configured to be normally closed, the contacts will open when the analyzer is
in a zero, calibration, or equilibration cycle rather than normal sampling cycle. Re-
fer to (Chapter 5): Flags1 for more information on configuring the alerts to provide
a "data valid" signal.
button. Scroll through the menu until the desired menu item is
alarm
.
To view alarm levels, highlight the level to be viewed from the following list and
press
to select. Press
enter
The Level 1 or higher access code is required for this function. Highlight the level
to be altered from the following list and press
value when the "New Value?" prompt is displayed. Press
return to the Alarm Menu; press
The engineering units associated with the alarm levels are determined by the
parameter linked to the analog output. If moisture concentration in ppm is on the
analog output, alarm levels are also defined in ppm; if cell temperature in °C is on
analog output, alarm levels are also in °C and so on.
to return to limit list.
cancel
enter
to quit.
cancel
to select. Enter the new level
to save change and
enter
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