Pressure Systems 9022 - Manual (Page 54)

Pressure Systems, Inc. NetScanner™ System (9016, 9021, & 9022) User’s Manual
www.PressureSystems.com 3 - 24
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 “Vppppf”
‘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 b inary floa t to 8-digit hex integer “ xxxxxxxx” 9
2 dou ble b inary floa t 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 b inary floa t to single b inary floa t (big en dian: m sb first) 4
8 single binary float to single b inary floa t (little endian: lsb first) 4
Example: