User's Manual

www.malags.com

information about both the numbers of pulses that are counted

per meter and the rotation direction in which it will calculate the

optical pulses correctly. The triggering of readings from the

GPR will ONLY be done in the positive direction of rotation.

This, so you should be able to move the wheel back-wards

without any readings made. However, if the wheel needs to be

rotated constantly in the opposite direction this can be

accomplished by changing acquisition direction in the GPR

software.

NOTE: When using both devices you should keep accurate

record of your calibration files for the devices so the right one

is selected for the device used at each measurement

occasion.

NOTE: The distance interval when using a measuring wheel

should be set to a greater value than 0.003 m. The measuring

wheel counts about 427 pulses/m, which is less than one

pulse/ 2mm. A distance < 0.003 m will correspond to zero

pulses and cause the antenna to start collecting data

immediately at full speed.