Sutron 8310 - Page 252

Sutron Corporation 8310 & 7310 Users Manual 8800-1125Rev. 2.7 (BETA) 4/16/2014 pg. 252
Day
2
This 2 byte encoded 6 bit binary encoded number
represents the Julian day of the year. The day tells
when the most recent (first) sensor reading of this
measurement was made.
Time
2
This 2 byte encoded 6 bit binary encoded number is a
number of minutes into the day. It tells when the
most recent (first) sensor reading of this measurement
was made.
Interval
2
This 2 byte encoded 6 bit binary encoded number tells
the measurement interval in minutes, or the amount
of time between readings of this measurement.
Measurement
Data
3 for each sensor
reading
Sensor data encoded 6 bit binary.
Additional
Measurement
s
Variable
If more than one measurement was setup for
transmission, more data will follow. Each
measurement setup will have data starting with the
Measurement Delimiter and ending with
Measurement Data.
Final Delimiter
1
This byte is always “.” and it is used to denote the end
of all measurement data.
Battery
voltage
1
This is the battery voltage measured prior to making
the transmission. The range of the number will be -32
to +31 and can be converted to volts by multiplying by
0.234 and adding 10.6 allowing a range of 3.1 to 18.1
volts.
Example message:
C3+ADGTU?///+BDGTU?@UI+CDGTU??~v///.L
Group 3 format C
Sequence A 1
Julian Day DG 263
Time TU 21:41
Interval ? 00:-1
Data: /// missing
Sequence B 2
Julian Day DG 263
Time TU 21:41
Interval ? 00:-1
Data: @UI 1353
Sequence C 3
Julian Day DG 263
Time TU 21:41
Interval ? 00:-1
Data: ?~v -74
/// missing
Batt V L 13.4
Six-Bit Binary Encoded Format
The six bit binary format is used to encode numbers into displayable ASCII characters. Notice
that fractional numbers cannot be represented, so for instance a battery voltage of 13.04 volts
set up with 2 right digits will be sent as 1304.
A 1 byte encoded number can range from -32 to +31.