Pressure Systems, Inc. Model 9116 User’s Manual
Page 39
www.PressureSystems.com
READ TRANSDUCER VOLTAGES (Command ‘V’)
Purpose:
Returns for the specified channels, the most recently acquired
raw pressure
data,
converted to volts directly from the averaged A/D counts. This simple
engineering-unit conversion bypasses any usage of the transducer’s factory-
calculated coefficients or the final calibration process’s
correction
coefficients
(offset and gain). Each datum returned in the response will be in the specified
high-precision data format.
This command is intended for advanced users
only and is not required for normal operation.
Command
“
V
ppppf
”
‘V’ is the
command
letter
‘
pppp
’ is the
position
field
‘
f’
is the
format
field
Response
“
dddd.. [dddd]
”
‘
dddd
’ are the
data
fields, each with a leading space (except
f
=7 or 8).
Description:
The 4-character hex
position
field
(pppp
) specifies a 16-bit binary bit-map, with
each bit (set to 1) specifying a particular channel number (16-1, left-to-right).
The 1-character
format
field (
f
) specifies the format of each
datum
field (‘
dddd
’)
that will be returned in the requested response. The first datum returned in the
response will be for the highest channel number requested, and each (non-
binary) datum will be preceded by a space character. Some formats may not be
applicable to the specific type of data being requested. Valid formats are shown
in the following table:
f
converts each internal response
datum
value from . . .
max. char.
0 single binary float
to 7-10-digit signed decimal “ [-xxx]x.xxxxxx”
13
1 single binary float
to 8-digit hex integer “ xxxxxxxx”
9
2 double binary float
to 16-digit hex integer “ xxxxxxxxxxxxxxxx”
17
5 single binary float
to long integer (EU*1000) then to 8-digit hex integer
9
7 single binary float
to single binary float (big endian: msb first)
4
8 single binary float
to single binary float (little endian: lsb first)
4
