MASSA PRODUCTS CORPORATION June 11, 2013
Product Manual 3 M3 Wireless Ultrasonic Level Sensor
2.1 Specifications and Dimensions
2.2 Dimensions
Here is the outline drawing of the sensor. Optional parts include a 2” gasket and 2” NPT nut if sensor is not threaded into a 2”
NPT fitting.
Models M3/150 and M3/95 Model M3/50
3.0 General Operation
The most effective way of setting up the sensor that will conserve battery power is to program it to sleep for a long period
followed by a brief awake period where the sensor sends its acquired Event Data (range, temperature, status, etc) automatically to
a gateway. This Event data will be stored in memory termed Data History Buffer when set up for automatic acquisition. During
this awake period, the gateway in return could send messages to change the sensor settings like stopping the deep-sleep cycle,
obtain diagnostic waveform data or other functions like retrieving past recorded events.
Enabling the sensor to automatically acquire Event Data is done by programming the Data Collection Interval register with a non-
zero value. Up to 111 of these events (or data acquisitions) can be stored and retrieved later.
It is important to note that the gateway and sensor must have the same PAN ID to communicate with each other on the ZigBee
Personal Area Network (PAN) with the exception of assigning sensor ID = 0 (which will associate with any gateway). It is
recommended that fixed wireless sensing applications use non-zero PAN IDs so that if another application and gateway is
introduced in the area (with its own unique PAN ID), it won’t interfere with the first application. If the application utilizes sensors
that are roaming and multiple gateways, then keep the factory default sensor PAN ID as zero. This will allow the sensor to join
any gateway.
4.0 Commissioning Pushbutton
Following is the table for the Commissioning pushbutton switch that is used to associate the sensor onto the ZigBee network. It is
also used to wake up the sensor from Deep-Sleep or to discharge the sensor circuitry after a battery is removed when manually
rebooting the sensor.
Button Press Action
Single click
Wakes the sensor for 30 seconds. "Find Me" functionality to find
coordinator and sends a Node Identification broadcast
transmission.
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