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3B SCIENTIFIC

PHYSICS

Acceleration Sensor, ±25g U11362

Instruction Sheet

05/08 Hh

1. Safety Instructions

• To avoid permanent damage to the

semiconductor sensor in the small black box,

the maximum acceleration in any direction

must not be allowed to exceed 2000 times the

gravitational acceleration of the earth (2000g).

• Do not allow the sensor element to fall from

any height greater 1.2 m onto a hard surface.

• The ±25g accelerometer may only be used for

educational purposes.

The ±25g accelerometer is not suitable for safety-

related applications.

2. Description

Sensor box with permanently connected

semiconductor accelerometer, which responds to

forces along its X-axis, for measuring the earth’s

gravitational field (acceleration due to gravity) and

acceleration of bodies in general up to ±25g.

The direction in which the gravitational field of the

earth should be aligned (X-axis) is printed on the

accelerometer.

The accelerometer works by a capacitive

measurement principle (g-cell), with in-built

linearised signal processing, low-pass filter,

temperature compensation, and automatic self-

testing.

The sensor box is designed to be detected

automatically by a 3B NETlog

unit.

3. Equipment Supplied

1 Sensor box with permanently connected

accelerometer, cable length 2 m

1 Velcro strip, 500 mm long, 20 mm wide, self-

adhesive

1 8-pin miniDIN connecting cable, 60 cm long

1 Instruction sheet for U11362

4. Technical Data

Measurement range: 0 to ±245 m/s²

Sensor type: Capacitive

semiconductor

sensor

Sensitivity: Typically 50 mV/g

Non-linearity: Max. ±1% of total

measurement range

Resolution: 0.2 m/s²

Bandwidth: Typically 400 Hz

Accelerometer fixing hole: Max. 3 mm diam.

Summary of content (2 pages)

PAGE 1
3B SCIENTIFIC® PHYSICS Acceleration Sensor, ±25g U11362 Instruction Sheet 05/08 Hh temperature compensation, and automatic selftesting. The sensor box is designed to be detected automatically by a 3B NETlogTM unit. 1. Safety Instructions • • To avoid permanent damage to the semiconductor sensor in the small black box, the maximum acceleration in any direction must not be allowed to exceed 2000 times the gravitational acceleration of the earth (2000g).
PAGE 2
5. Instructions • • Place the sensor box near the experiment and fix the accelerometer (the small black box) firmly to the body for which the acceleration is to be measured (the target) using either the Velcro strip supplied or a screw fixing. Read off the value of the acceleration on the display of the 3B NETlogTM unit. Fig. 1 Typical acceleration behaviour at the ankle of a TM skipping person, recorded with the 3B NETlab (U11310) 6.