Xylem H-335 - Manual (Page 16)

1-12 Introduction H-335
Test the Installation
Step 12: Check to make certain the sensor is still at the desired SensorAngle. Make certain the gate is
fully closed and resting on the sill. Wait at least 15 minutes or so for the sensor temperature
to stabilize before proceeding to the next step.
Step 13: Issue the extended “aXZO” Zero Offset command. The H-335 will make a fresh angle
measurement and use this value to automatically update the UserAngleOffset value to
produce a UserAngle reading = 0.0 .
Step 14: Make a “aM” measurement. The GateArcLength, GateHeight and UserAngle parameters
should all be zero. Raise the gate and check for proper (increasing) readings.
The SDI-12 “aM” command makes the following measurements:
a +AA.AA+BB.BB+CC.CC+DD.DD<CR><LF>
Where:
a = Sensor Address (0-9, A-Z)
+AA.AA = GateArcLength (inches, meters etc.)
+BB.BB = GateHeight (inches, meters etc.)
+CC.CC = UserAngle (degrees of angle)
+DD.DD = SensorTemperature ( C)
This completes installation and testing of the H-335.