PASCO Specialty & Mfg. CI-6742 Benutzerhandbuch

Motion Sensor II

012-06757B

4

PASCO scientific warrants the product to be free from

defects in materials and workmanship for a period of

one year from the date of shipment to the customer.

PASCO will repair or replace, at its option, any part of

the product which is deemed to be defective in

material or workmanship. The warranty does not

cover damage to the product caused by abuse or

improper use. Determination of whether a product

failure is the result of a manufacturing defect or

improper use by the customer shall be made solely

by PASCO scientific. Responsibility for the return of

equipment for warranty repair belongs to the

customer. Equipment must be properly packed to

prevent damage and shipped postage or freight

prepaid. (Damage caused by improper packing of the

equipment for return shipment will not be covered by

the warranty.) Shipping costs for returning the

equipment after repair will be paid by PASCO

scientific.

Address:

PASCO scientific

10101 Foothills Blvd.

Roseville, CA  95747-7100

Phone:

(916) 786-3800

FAX:

(916) 786-8905

e-mail:

techsupp@pasco.com

web:

www.pasco.com

When triggered, the module produces a burst of 16

pulses at a frequency of about 49 KHz. This

produces an audible click from the electrostatic

transducer which functions as both a speaker and a

microphone. The time between the trigger rising

edge and the echo rising edge is proportional to the

distance. The trip time for sound in air is about 0.3

ms/m, so an object at a distance of 0.6 m produces a

round-trip time delay of 3.6 ms. The sound intensity

decreases with distance, and for a round trip the

attenuation can be large enough for the receiver to

miss the echo. Therefore the gain of the receiver’s

amplifier is increased in discrete amounts in 11 steps

where the maximum gain is reached in 38 ms. This

increases the usable distance to about 8 meters with

a highly reflective target. Operating the receiver at

reduced gain at the beginning of the cycle reduces

the circuit’s sensitivity to false echoes.

An accessory cable (available separately, PASCO

part no. 514-06862) is required for operation of the

Motion Sensor II with a Texas Instruments CBL

System

™

 or a Casio EA-100 Data Analyzer

™

.

An accessory cable (available separately, PASCO

part no. 514-06933) is required for operation of the

Motion Sensor II with a ULI interface.

Note:  This instruction sheet was written

assuming that the user is familiar with

ScienceWorkshop. Users can gain

familiarity by working through the tutorials

provided with ScienceWorkshop.

Note: This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there
is no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following
measures:

- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and

receiver.

- Connect the equipment into an outlet on a circuit

different from that to which the receiver is
connected.

- Consult the dealer or an experienced radio/ TV

technician for help

.