Vaisala MMT330 - Manual (Page 78)

User's Guide _______________________________________________________________________
76 ___________________________________________________________________ M210733EN-G
6. Set a suitable Hysteresis value to prevent the alarm from being
triggered unnecessarily by small measurement changes that pass
the alarm limit repeatedly.
7. Set or clear the Alarm enable checkbox to enable or disable the
alarm.
8. Press the Exit button to leave the alarm configuration screen and
return to the basic view.
Using Serial Line
Use the serial line command ALSEL to view or set the display alarms.
ALSEL [quantity1 quantity2]
where
quantity1 = Quantity for display alarm 1. You can set any quantity
available on your transmitter; see Table 3 on page 19 and
Table 4 on page 19. In addition to quantities, you can also
select the following:
FAULT – Alarm for device errors
ONLINE – Alarm for sensor operations that freeze the
measurement output (for example, chemical purge).
quantity2 = Quantity for display alarm 2. Options are the same as for
quantity1.
Example (view current display alarm settings):
>alsel ?
Al1 aw above: 0.50 ?
Al1 aw below: - ?
Al1 aw hyst : 0.10 ?
Al1 aw enabl: ON ?
Al2 T above: 0.00 'C ?
Al2 T below: 0.00 'C ?
Al2 T hyst : 0.00 'C ?
Al2 T enabl: OFF ?
Warning! One or more alarms disabled.
>