Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 43
Table 6
FORM Command Parameters
Measured Parameter
Abbreviation in FORM Command
Dewpoint/frost point temperature
Tdf
Dewpoint/frost point temperature,
converted to atmospheric pressure
Tdfa
ppm moisture, by volume
H20
Pressure, absolute
P
Pressure, normalized
Pnorm
Density Rhoo
Temperature Ta
Table 7
FORM Command Modifiers
Modifier Description
x.y
Length modifier (number of digits and decimal places)
#t Tabulator
#r Carriage-return
#n Line
feed
""
String constant, length 1 ... 15 characters
#xxx
ASCII code value (decimal) of a special character;
for example,
#027
for ESC
ADDR
Transmitter address (0 ... 255)
ERR
Currently active transmitter errors in a four bit field:
bit0bit1bit2bit3bit4
bit0 T MEAS error
bit1 P out of range error
bit2 Fmeas error
bit3 Flash csum error
SN Transmitter
serial
number
TIME
Time since transmitter was started or reset
Ux
Shows the name of the measurement unit using “x” number
of characters. For example,
U3
shows the name of the
measurement unit with three characters
CS2
Modulus-256 checksum of message sent so far, ASCII
encoded hexadecimal notation
CS4
Modulus-65536 checksum of message sent so far, ASCII
encoded hexadecimal notation
CSX
NMEA xor-checksum of message sent so far, ASCII encoded
hexadecimal notation
