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UE ECM-1 INSTALLATION & OPERATION
POWER REQUIREMENTS
The UE ECM-1 requires a 24 Volt, DC power source @ 200 milliamperes total. The power
connections are to be made to the I/O cable. Refer to the Pin Out/Description Diagram for the
connections.
SENSITIVITY CONTROL
In order to accommodate the entire 100 decibel dynamic range, some adjustment in the field is
required. This is set by the multi turn potentiometer located on the front panel the unit. The sensitivity
is preset at the factory to maximum or fully clockwise. If this is too sensitive, use a screwdriver and
turn the potentiometer counterclockwise to decrease the sensitivity.
THRESHOLD CONTROL
The threshold adjustment is available if an alarm output is required. This is the adjustment used to get
a simple output signal change when the ultrasonic input has either exceeded or gone below a setpoint.
There is a Alarm Threshold Sense output at pin 8 on the DB9 connector or on the Blue colored I/O
Cable wire. This can be detected as a voltage from 0-10 VDC which is where the threshold or set
point is currently adjusted to. To raise the level, turn the potentiometer clockwise and to lower
the level turn the potentiometer counterclockwise.
VOLTAGE AND CURRENT OUTPUTS
The sensor provides voltage, and current outputs. The voltage and current outputs are continuous
analog signals that are proportional to the ultrasonic activity sensed.
The voltage output has a range of 0 to 10 volts DC full scale. A 2.5 volt change in output voltage
corresponds to a 10dB change in ultrasonic input signal. Therefore, the entire 10 volt range represents
a 40 dB change in ultrasonic input level.
The current output has a range of 4 mA to 20 mA DC. Therefore, the full 4 mA to 20 mA range
represents an ultrasonic level change of 40dB. The output can be connected to a 250 OHM resistor
from current output to current output return and fed to a 5V A to D converter if digital monitoring is
required. Refer to the diagram for connections. Note: Current output is 4-20 mA output (pin 2) and
current output return is pin 3 .
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