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APG IRU-3000 user manual User Manual

Page 11

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Rev. A2, 11/08

IRU-2xx4/3xx4

11

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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BLANKING

Blanking allows the sensor to ignore all echoes returned before this distance.
There is a minimum distance to which this can be set which is 152 millimeters.
This distance (or time) allows the ceramic in the transducer to stop vibrating after
it has transmitted a series of pules.

To read the current setting for the blanking in the sensor:

Send

Receive

AAh

Start Byte

66h

Start Byte

01h,

Sensor Number

01h

Sensor Number

05h

Command

05h

Command

00h

Data (not used)

##h

Blanking (High Byte)

00h

Data (not used)

##h

Blanking (Low Byte)

55h

End Byte

##h

NA

99h

Stop Byte

To send a new Blanking distance use the command structure:

Send
AAh

Start Byte

01h,

Sensor Number

06h

Command

00h

Data (High Byte)

00h

Data (Low Byte)

55h

End Byte

Example: Suppose the sensor is mounted in a position that were a partial
structure is located 600 mm from the sensor head. The desired detection range
is from 650 mm to 2100 mm . Setting the blanking at 620mm would allow the
sensor to ignore the structure and monitor the desired detection area.

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