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Your LPU-2127 ultrasonic sensor is very low maintenance and will need little care as long as it was installed
correctly. However, in general, you should:
•
Avoid applications for which the sensor was not designed, such as extreme temperatures, contact with
incompatible corrosive chemicals, or other damaging environments.
•
Inspect the threads whenever you remove the sensor from duty or change its location.
Chapter 4: Maintenance
• General Care
MODE DESCRIPTION PARAMETERS
14
Blanking
Units = Determined by Mode 1
Range = 0.5 -16 ft.
Default = 1.00 ft.
Mode 14 sets the Blanking distance, which is the zone from the sensor to a point where the first echo will
be accepted. While blanking distance can be used to ignore unwanted targets -- such as welds, seams, pipe
fittings, or gaskets -- between the sensor and the closest acceptable target level, such objects generally
create additional reflections and echoes, which are hard to filter out. More often, Blanking distance is used
for a sensor installed in a stand pipe.
Because of the physical properties of an ultrasonic sensor, objects cannot be detected closer than
approximately 1 foot from the face of the transducer. However, this distance varies according to how much
energy is being transmitted (Mode 15) and the installation. Low pulses and soft mounting may allow target
detection as close as 6 inches.
MODE DESCRIPTION PARAMETERS
15
Pulses
Range = 1-20
Default = 16
Mode 15 sets the maximum number of pulses the sensor can transmit when operating in AutoSense or
simply the number of pulses when operating in Manual (mode 12). The LPU emits a burst of pulses and
measures the time it takes for the burst to travel to and from the target. The more pulses that are sent in a
burst, the stronger the returning echo. When operating in Manual, increase the strength of the transmission
by increasing the number of pulses for detecting soft targets in damping environments. In acoustically active
environments or small enclosed areas, decrease the number of pulses to reduce multiple echoes.
MODE DESCRIPTION
16
Software Version
Mode 16 displays the software version of the LPU.
MODE DESCRIPTION
17
Reset
Mode 17 resets the LPU to factory default settings.
