Xylem H-335 - Manual (Page 14)

1-10 Introduction H-335
1.9.1 Method I
Issue repeated SDI-12 “aM1” and “aD0” commands.
For the “aM1” command, the H-335 places 6 parameters in its data buffer where:
a = Sensor Address (0-9,A-Z)
+AA.AA = UserAngle (degrees of angle)
+BB.BBB = SensorAngle (degrees of angle)
+CCCC = Raw A/D Positive Count (±8192)
+DDDD = Raw A/D Negative Count (±8192)
+EEEE = Raw A/D Positive Count (±16384)
+FF.FF = SensorTemperature ( C)
1.9.2 Method II
Use the “aXTEST” command (see Chapter 2).
This command is primarily used for production testing and requires the use of a H-419 Sidekick interface
and a PC. This command causes the H-335 to transmit unsolicited real-time data for testing purposes. This
is not compliant with the SDI-12 specification and is not used with data loggers.
XTEST continually prints the following parameters in a single line:
Sensor Address (0-9, A-Z)
SensorAngle
( Angle)
For example:
1 +1.200
1 +1.200
1 +1.500
1 +1.700
1 +1.900
etc.
Step 5: Remove the cover from the H-335 and make the wiring connections. Leave the cover off, do
not bolt the assembly to the I-beam at this time.
Step 6: Connect the +12V power. Issue an “aI” identifiy command to make certain the sensor is
connected and working.
Step 7: Make certain the tainter gate is fully closed and resting on the sill.