User`s guide

Table B-9. SDF_SCAN_VAR (Scan variable record)
Field
Index
Binary
Index*
Field Name/Description
Data
Type
Range/
Units
1 1:2 recordType short 19
2 3:6 recordSize long variable
3 7:10 unique_record — byte offset from the beginning of the file to a
record containing an instrument-specific scan variable header.
May be ignored if recalled into a different type instrument.
long
−1:(2
31
) 1
4 11:14 headersize — size of the header portion of this record (excluding
the scan variable values).
long 54
5 15:16 scanBase_type — type of scan variable
0 = unknown
1 = scan number
2=time
3=RPM
4=temperature
5 = tachometer count
short 0:5
6 17:18 scanOrder_type — progression of scan values
0 = unknown
1 = increasing in value
2 = decreasing in value
short 0:2
7 19:20 DATA_recordNum— SDF_DATA_HDR record number
associated with this record, (−1 if no specific association).
short 0:num_of_
DATA_HDR_
record −1
8 21:30 scan_ID — name of scan information. char[10] i.d.
9 31:32 scanVar_type — tells you the size and format of each scan
variable value
1 = short (two-byte binary-encoded integer)
2 = long (four-byte binary-encoded integer)
3 = float (four-byte floating-point number)
4 = double (eight-byte floating-point number)
short 1:4
10 33:54 scanUnit — engineering unit used for scan. struct see
SDF_UNIT
Scan variable values start here.
Standard Data Format (SDF)
B-23