Data Sheet

Page 7

Web: www.maxbotix.com

PD11500Y

MaxBotix

Inc.

Patent 7,679,996

HRXL-MaxSonar

- WR/WRC

™

Series

MaxBotix Inc., products are engineered and assembled in the USA.

Real-time or triggered operation allows users to take advantage of a few functions unavailable during free run mode.

When operating in triggered mode, an unfiltered maximum refresh rate can be achieved. This triggered operation allows

users to range targets moving away from or closer to the sensor faster than 240mm per reading.

Users can enter and remain in the real-time or triggered operation by making sure that before the end each range cycle,

the voltage level on Pin 4 is set low. After the sensor has completed the last reading, then Pin 4 is brought high. When

Pin 4 is brought high, a brand new range cycle starts and the HRXL-MaxSonar-WR will output the most recent range

data without filtering.

Readings during triggered operation are less accurate than the filtered operation by approximately ±5-mm. Because the

range readings are not filtered, noise tolerance can be greatly reduced. Care should be taken to make sure that only one

sensor is sampling range at a time.

Sensor minimum distance - No sensor dead zone

(MB7360, MB7369, MB7380, and MB7389)

The 5 meter sensors have a minimum reported distance of 30-cm (11.8 inches). However, the HRXL-MaxSonar-WR

will report targets up to the sensor face (for the WR sensors)

and to within 1-mm of the front sensor face (for the WRC

sensors)

. For the 5 meter HRXL-MaxSonar-WR sensors, targets closer than 300-mm will typically range as 300-mm.

Notes:

refers to section that compares WR to Alternative Packages on page 4

Sensor minimum distance - No sensor dead zone

(MB7363, MB7366, MB7368, MB7383, MB7386, and MB7388)

The 10 meter sensors have a minimum reported distance of 50-cm (19.7 inches). However, the HRXL-MaxSonar-WRL

will report targets up to the sensor face. For the 10 meter HRXL-MaxSonar-WRL sensors, targets closer than 500-mm

will typically range as 500-mm.

Sensor minimum distance - No sensor dead zone

(MB7375 and MB7395)

The 1.5 meter sensors have a minimum reported distance of 50-cm (19.7 inches). However, the HRXL-MaxSonar-WRB

will report targets up to the sensor face. For the 1.5 meter HRXL-MaxSonar-WRB sensors, targets closer than 500-mm

will typically range as 500-mm.

Sensor operation from 30-cm to 50-cm

Because of acoustic effects in the near field, objects between 30-cm and 50-cm may experience acoustic phase cancella-

tion of the returning wave, resulting in inaccuracies of up to 5-mm. These effects become less prevalent as the target dis-

tance increases, and have not been observed past 50-cm. For this reason, users that require the highest accuracy are en-

couraged to mount the HRXL-MaxSonar-WR farther than 50-cm away from objects.