Vaisala PTB220 - Manual (Page 112)

U SER ' S G UIDE _______________________________________________________________________
106 __________________________________________________________________ M210194 EN -A
The output after the -7777S command is:
REF x.yy
where the x.yy is the software version code.
The output after the -8888SS test command is:
D-NOS
BUSY
PASS
or
D-NOS
BUSY
ERR
In order to exit the D-NOS mode, give the command C and the output
is:
VAISALA DIGITAL BAROMETER
PTB 220
BUSY
and then after a few seconds:
VAISALA DIGITAL BAROMETER
PTB 220
11.812 to 35.436 in Hg A