Nellcor N-200 - Page 62

Guide to Operation
56
Data Packet Descriptions: The following data packets may
be received in trend or event data transmission. For V, W, X,
and Z packets, the first field (n . . n) has variable length.
E Packet < STX > E < CRLF > < ETX >
This is the last record sent to indicate end of data in normal
completion.
V Packet < STX > Vnnn < CRLF > < ETX >
This is sent only if the N-200 stops before the requested data
transmission is complete. It indicates why the N-200 stopped.
nnn Reason for Stop
4 Timeout error
8 Data error
16 Timed out error
32 Communications lost
64 Data recall error
128 By operator request
W Packet < STX > Wn . . . nSnnnRnnn < CRLF >
< ETX >
These are the actual trend data points. Data is sampled every
second, so each packet represents 5 seconds of saturation and
pulse rate data.
Wn . . . n Trend data point (n . . . n =
current index up to 4 digits)
Snnn Saturation
Rnnn Pulse rate
X Packet < STX > Xn . . . nSnnnRnnnPnnn < CRLF >
<ETX >
These are the actual event data sampled every second. There is
no averaging, so each packet represents 1 second of saturation,
pulse rate, and pulse amplitude data.