PASCO ME-9283 Tape Timer - Manual (Page 8)

Tape Timer 012-04944B
4
Setup and Operation
Inserting or Replacing the Carbon Paper
➀ Remove the thumb screw and the strike plate from
the top of the Tape Timer.
➁ If applicable, remove the used carbon paper and
discard it.
➂ Turn the strike plate over. With the carbon side fac-
ing toward the strike plate, center the hole of the new
carbon paper disk over the peg on the strike plate.
➃
Turn both the strike plate and the carbon disk to
their original orientation and fasten the strike plate
in its place on top of the timer with the thumb
screw. Be sure the carbon disk can rotate freely so
the hammer will strike the disk in a circular pattern
rather than in just one spot.
Inserting the Paper Tape
➄
Cut the paper tape to the length required to span the
motion of the object.
➅
Thread one end of the paper tape through both pa-
per guides, between the strike plate and the carbon
paper disk. (The paper tape passes over the top of
the carbon disk.)
➆
Attach one end of the paper tape to the object and
place the apparatus so
the tape is in line with
the motional direction
of the object.
Using the Tape Timer
➇ Turn the selector switch to the desired frequency
and set the object in motion. While the object is
pulling the tape through the timer, the hammer hits
the strike plate at even time intervals. Each hit pro-
duces a dot on the paper transferred through the
carbon paper.
➈ To analyze the data, record the positions of the dots
on the tape. Average speeds can be calculated us-
ing the distances between adjacent dots divided by
the time interval.
➉
When the dots become faint, move the carbon disk
so the hammer will strike it in a new spot. To do so,
loosen the thumb screw that holds the strike plate
on top of the timer, slide the strike plate to a new
position, and tighten the thumb screw. The carbon
disk moves with the strike plate.
Battery Replacement
➀
Turn the timer box over and loosen the thumb
screw on the bottom of the box.
➁
Remove the bottom of the box. Unclip and replace
the 9 V battery with a new one.
➂ Replace the bottom of the box and tighten the
thumb screw.
TAPE
TIMER
ME-9283
40 10 OFF
Hz
9V BATTERY REMOVE
BOTTOM COVER
Direction of
object motion
Carbon dots
Paper tape
Measured
distance
Battery
Lid Thumb
screw
Battery
clip
(PCB)
Battery
compartment
Peg
Carbon side Strike plate
Thumb screw
Hammer
Carbon paper disk