3B Scientific Photo Gate - Manual

3B SCIENTIFIC ® PHYSICS
1
Light barrier U11365
Instruction sheet
01/10 Hh/570012
1. Safety instructions
• When using the equipment in conjunction with
a laser source, strictly observe the stipulated
safety regulations.
• Never look directly into the laser beam.
2. Scope of delivery
1 Light barrier
1 Stand rod, length: 120 mm
1 8-pin mini DIN connection cable, length: 1 m
1 Knurled screw M6x1
3. Description
The light barrier can be used in two operating
modes.
1. Internal light barrier mode: light barrier with an
infrared light source and an infra-red detector with
a very short signal delay for measuring time inter-
vals with moving bodies, e.g. during free fall, in air
track experiments and for pendulum oscillations,
as well as for counting pulses.
2. Laser light barrier mode: laser diode detector
built in at the side for setting up a wide-range
barrier along with a laser pointer, e.g. during sport-
ing events.
The light barrier is equipped with a built-in LED
function display: beam broken = 1 (TTL high).
When disabled or when the beam is interrupted,
the LED function display comes on.
The narrow barrier arm in front of the infra-red
source includes a sliding mechanical shutter that is
used for disabling internal light-barrier mode and
activating laser light -barrier mode.
4. Technical data
Separation of prongs: 82 mm
Rise time: 60 ns
Spatial resolution: < 1 mm
Time resolution: 10 µs