Vaisala PTB220 - Manual (Page 36)

U SER ' S G UIDE _______________________________________________________________________
30 ___________________________________________________________________ M210194 EN -A
fluctuations, and for example opening the door of a room will often
result in temporary pressure instability.
PLARM Setting the pressure alarm levels
PLARM x y
where:
x = the low alarm level (LO ALARM)
y = the high alarm level (HI ALARM)
The PLARM command is used to set or inspect the low and high
pressure alarm levels. The factory settings are 500 hPa for the low
alarm level and 1100 hPa for the high alarm level for the barometers
with a pressure range 500...1100 hPa. The factory settings for
barometers with a pressure range of 50...1100 hPa are 50 hPa (low
level) and 1100 hPa (high level)
Examples:
>plarm
Hi alarm
: 1100.00 hPa
Lo alarm : 500.00 hPa
>plarm 900 1050
Hi alarm
: 1050.00 hPa
Lo alarm : 900.00 hPa
>
The alarm output operates in STOP and RUN sending modes only
(see pages 12 and 43). The barometer outputs the alarm immediately
when the alarm pressure level is exceeded. The alarm message is
output only once with no prompt associated with it.
Examples:
HI ALARM
LO ALARM
PDMAX Setting the pressure difference limit
PDMAX x
where: