Vernier Software & Technology LQ2-LE Manuel D’Utilisation

LabQuest App 
 

 

    

14 

o 

 – Sometimes 

experiments do not depend on time, but 
depend on the setting of another 

quantity. For example, in a Boyle’s law 
experiment one wants to know the 
pressure as a function of the volume of 
gas. Thus, in Events with Entry mode, no 
time information is recorded. 
 
When setting up this mode, you can 
enter a name and units for the entry, or independent variable, column. One or two 
additional columns of data can be entered as you collect data. You also have an 
option to average data over ten seconds and report the averaged reading.  
 
In Events with Entry mode, once data 
collection is started, a Keep button 

 

appears. Tap the Keep button to record 
the sensor value (e.g., gas pressure in the 

Boyle’s law experiment). In response, 
LabQuest will prompt for the Entry 
value (e.g., gas volume in the Boyle’s 
law experiment). Sensor values are 
plotted versus the Entry values, as shown 
in the screenshot at right. 

 

o 

 – Selected Events 

is similar to the Events with Entry mode, 

except that entries of 1, 2, 3… are 
entered automatically for you. No time 
information is recorded in Selected 
Events mode.  

 
 
 
 

o 

 – Photogates 

require a different set of timing options. 
When a photogate is detected, LabQuest 
switches to the data-collection mode 
Photogate Timing mode.  
 
You have two options for ending data 
collection in this mode: the collection 
runs until the user taps Stop, or the 
collection can be set to end after a defined number of events. A block/unblock 
pair counts as two events. Various photogate modes are available to set what 
parameters LabQuest calculates from the block and unblock times. For more 
information, see