PASCO ME-9498A User Manual
Photogate Head
®
Photogate
Head
Small Rod Clamp
Thumbscrew
Photogate Cable
Phone Plug
RJ12 Plug
RJ12 Jack
1/4-20 Threaded Hole
Slot for attaching
a Super Pulley.
Infrared
Source
Infrared
Detector
(not shown)
LED (not
shown)
Pulley Mounting Rod
(SA-9242)
Super Pulley
(ME-9450A)
The small rod clamp and
thumbscrew allows the
Photogate Head to be
mounted on a 6.3 millimeter (1/4 in) diameter
support rod (e.g., PASCO
ME-9805 Photogate
Stand).
Support Rod
(from ME-9805)
1/4-20
thumbscrew
Small Rod Clamp
Photogate Cable
The Pulley Mounting Rod,
Photogate Head, Super
Pulley, and 1/4-20 Thumbscrew are in the ME-6838
Photogate/Pulley System.
ME-9498A
Instruction Sheet
012-06372B
*012-06372*
Introduction
The PASCO ME-9498A Photogate Head has a narrow infrared
beam and a fast fall time that provide very accurate signals for
timing. When the infrared beam between the source and detector is blocked, the output voltage of the photogate is low, and
the red LED (light emitting diode) on the photogate goes on.
When the beam is not blocked, the output voltage is high, and
the LED is off.
The cable included with the Photogate Head is detachable from
the unit. One end of the cable is a RJ12 telephone plug that connects to the RJ12 jack in the photogate housing. At the other
end, a stereo phone plug connects directly into a PASCO Photogate Timer (ME-9206B and ME-9215B), PASCO Smart Timer
(ME-8930), or into any PASCO interface with digital channels
or a PASPORT Digital Adapter (PS-2159). See the PASCO web
site at www.pasco.com for more information.
Additional Features
The raised slot on the housing provides a seat for attaching a
PASCO ME-9450A Super Pulley using a PASCO SA-9242 Pulley Mounting Rod or a 1/4-20 0.375 inch thumbscrew.
800-772-8700 www.pasco.com
®
Photogate Head ME-9498A
Pulley
Mounting Rod
(SA-9242)
1/4-20
Threaded Hole
Width = 7.5 cm
Depth =
4.2 cm
Adjustable Angle Clamp
(ME-8744)
Support Rod (up to 12.7 mm diameter)
1/4-20
Threaded Hole
Locking Knob
PASCO Track
Photogate Bracket
(ME-9806)
T- s l o t
Photogate Head
Square
Nut
®
PHOTOGATE HEAD
ASSEMBLY NO.003-06268
LED is on when
beam is blocked
Infrared Beam
Small Rod
Clamp
RJ12
Phone Plug
Stereo
Phone Plug
Photogate Stand
(ME-9805)
6.2 mm (1/4 in)
diameter rod
Source
Detector
The Photogate Head can be attached to the PASCO SA-9242
Pulley Mounting Rod. This 14 cm long (6 in) by 9.5 mm (3/8 in)
diameter rod fits into the 1/4-20 threaded hole in the photogate
housing opposite the side of the small rod clamp..
The open space for the Photogate Head is 7.5 cm wide and 4.2
cm deep.
The Photogate Head can be mounted on a support rod of up to
12.7 millimeter (1/2 in) in diameter by attaching a PASCO
ME-8744 Adjustable Angle Clamp. It is necessary to remove
the “"mobile" part of the adjustable angle clamp from the clamp
assembly and secure the “fixed” part of the clamp assembly to
the 1/4-20 threaded hole in the photogate housing opposite the
side of the small rod clamp. Rotate the equipment to the correct
orientation and then secure it with the locking knob on the
clamp assembly.
Use the short thumbscrew from the bracket assembly for attaching the photogate to the mounting bracket.
Operation
1. Attach the Photogate Head to a support rod, clamp, or
mounting bracket.
The Photogate Head can also be attached to the side of a
PASCO Track with a ME-9806 Photogate Bracket (set of 2).
Slide the square nut on the Photogate Bracket into the T-slot on
the side of the PASCO Track. It is necessary to remove the small
rod clamp from the Photogate Head. (Save the clamp assembly
for later use.)
2
2. Position the photogate so the object to be timed will pass
through the photogate, blocking the infrared beam. To minimize parallax error, pass the object as close to the infrared
detector as possible, with the line of travel perpendicular to
the beam. Loosen the small rod clamp thumbscrew to
change the angle or height of the photogate.
3. Plug the RJ12 phone plug from the cable assembly into the
modular phone jack on the photogate housing.
4. Plug the stereo phone plug at the other end of the cable
assembly into the timer, adapter, or interface.
5. Test the operation of the photogate by watching the LED on
the photogate as the beam is blocked.
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