6-11
occurred between the two captures.
•The next byte is a counter for Consecutive Captures. If programmed to record 4 captures per
event, the four captures will have values of 0x000, 0x001, 0x002 and 0x003, respectively, for
this byte.
•The next 8 bytes are a Time Stamp of the format above. It is the Timing Point Time Stamp.
Since captures may be triggered by events in previous captures, every capture designates a point
within itself upon which to base the time for samples within that capture.
•The next byte is the Timing Point millisecond. It is a binary value in the range 0x000 – 0x009,
and represents the millisecond of the Timing Point Time Stamp.
•The next byte is unused.
•The next 2 bytes are a signed integer with an index of the point used as the Timing Point. This
index always refers to a sample in this capture, regardless of the location of the triggering cycle
for this capture.
•The next 32 bytes represent eight, 4-byte Sample Gain Factors. The order of these readings is:
VAN
VBN
VCN
VAUX
IA
IB
IC
IAUX
For EPM 9650s with regular hardware or EPM 9800s, Sample Gain Factors are a four-byte
unsigned value with two bytes of fraction, covering a range of 0 – 65535.999985, where each
count represents 1/65536 gain.
For EPM 9650s with 300 V hardware, sample Gain Factors are a four byte unsigned value with
15 bits of fraction, covering a range of 0-131071.999969, where each count represents 1/32768
gain.
These gain factors are a multiplicative factor to scale samples, represented in percent of A/D full
scale, into secondary units.