Xylem System 5000 User Manual - Manual (Page 56)

Pseudo-Binary
Send data using a 1-4 character coded sequence for each value. For example, 15.26 would
be represented as a 3-byte, 2-precision value would be @Wv. See the GOES Pseudo-Binary
Look Up Table later in this chapter for instructions on decoding these values. Binary data will
be preceded with the characters “BST” for binary scan ordered data transmissions or with
“BCT” for binary channel ordered data transmissions.
OUTPUTS
54
Send SHEF Headers
The system uses this option to see if SHEF codes are to be included in the data transmission.
SHEF stands for Standard Hydrometeorological Exchange Format. This is a documented set of
rules for coding of data in a form for both visual and computer recognition. The SHEF code is
typically a two character code that represents the data. For example, the standard SHEF code for
Stage data is HG, indicating the Height of the Gauge, or TA for ambient temperature. The SHEF
codes may be useful in decoding and although SHEF codes can be defined and transmitted, no
attempt was made to hold to the SHEF code format. Sending the SHEF code will add time to the
transmission so it may cut down on the amount of data able to be transmitted.
Data Sent First
Defines whether the Newest or Oldest data should be sent first, appearing at the top of the
transmission data. Some decode programs only accept the data in one format and not the other.
Data Order
In conjunction with the Data Layout, this option defines how the data will be presented. Regarding
the Default layout, the data will be sent based on each transmitted line representing a single scan
or each transmitted line representing a single channel or sensor.
Scan Order
Each line of data represents one scan and one value from each Task.
HG TA VB
18.34 22.78 12.45
18.76 22.45 12.44
18.97 22.15 12.45
19.43 22.02 12.45
SHEF headers turned on.
Stage, Temp, and Battery values in
each line.
Each line is a different scan at some
defined time interval.
Channel Order (Default)
Each line represents all the data from a single Task.
HG 18.34 18.76 18.97 19.43
TA 22.78 22.45 22.15 22.02
VB 12.45 12.44 12.45 12.45
Each line has all data from a single
Task. Each value in the line is scanned
at different times based on scan rate.