62 T i m i n g
S c r e e n
Ti m i n g S c r e e n
Use the Timing screen to set up measurements made with photogates, Smart Pul-
leys and other switch- or counting-type sensors.
To Open the Timing Screen
The Timing screen usually launches automatically when you connect a switch- or
counting-type digital sensor to the GLX through a Photogate Port or a Digital
Adapter.
If a timer for a sensor has already been set up, the Timing screen will not auto-
matically launch when that sensor is plugged in. To manually open the Timing
screen from the Home Screen, do one of the following:
use the arrow keys to highlight the Timing icon and press
; or
click the Timing icon.
Theory of Timing
Certain digital sensors connected to the GLX through a Digital Adapter or Photo-
gate Port operate differently from most other sensors. Rather than collecting data
at a constant rate, they send a signal to the GLX only when an event happens. For
instance:
•
when a photogate switches from being blocked to unblocked, or vice-versa;
•
when the spoke of a pulley enters or exits a photogate; or
•
when a nuclear sensor detects a particle.
The GLX can be configured to measure the time span of a particular sequence of
events. Examples of sequences include:
•
blocked-unblocked, or “time-in-gate;”
•
blocked-blocked, or “time-between-gates;” and
•
blocked-blocked-blocked, used to measure the period of a pendulum.
The “blocked” event occurs when a photogate switches from being
unblocked to blocked. The “unblocked” event occurs when a photogate
switches from being blocked to unblocked.
Whenever the specified sequence occurs, the GLX records the time span of the
sequence as a data point. It also records the time at which the sequence occurred,
The Timing Screen
13
Photogate Port is PASCO part
PS-2123A. Digital Adapter is PASCO
part PS-2159.
The Timing icon on
the Home Screen
Summary of Contents for Xplorer GLX
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Page 7: ...Part 1 Users Guide...
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Page 18: ...12 O v e r v i e w o f t h e G L X...
Page 94: ...88 S e t t i n g s S c r e e n...
Page 98: ...92 P r i n t i n g...
Page 104: ...98 O p e r a t i n g T e m p e r a t u r e...
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Page 116: ...110 C a l o r i m e t r y...
Page 132: ...126 V o l t a g e v e r s u s R e s i s t a n c e...
Page 136: ...130 I n d u c e d E l e c t r o m o t i v e F o r c e...
Page 146: ...140 B e a t F r e q u e n c y...
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