Clemson Biology Project
Appendix 2
EA100-3
EA100. The [NEXT] and [ENTER] secondary keys written in grey are the secondary use
of [DataLOG] and [TRIGGER] when the EA100 is in the SET UP or DataLOG mode.
What they do is described below.
[NEXT] Pressing [DataLog] activates [NEXT] while performing manual set up recalls the next
setting for the item you are setting. [SHIFT][DataLOG] returns to the previous value.
[ENTER] The [TRIGGER] key functions as an [ENTER] key in the SET UP mode. It is used to
select values when manually setting up the EA100 in the SET UP mode. Thus pressing
[TRIGGER] will enter the depicted value into that area of set up.
Collecting Data
There are two ways to collect data using the EA100. One is using the Multimeter
and the other is using the Data Logger. The Multimeter is used when sample rate and
time are unimportant. The Data Logger is used when time is of importance. When you
turn on the EA100 “RecTIME” is blinking in the upper left corner, “DONE” appears
below that, and a large initial reading from some prior collection is showing on the
screen. This area is called the communications mode, which is where the EA100 waits for
commands or signals from a linked graphing calculator. We will discuss this mode later.
To collect data, you will need to be in Multimeter or Data Logger mode. Data collection
can occur with or without a calculator connected to the EA100.
MULTIMETER MODE
With the EA100 turned off, plug in the probe you wish to use for collecting
data. It is very important that the EA100 be OFF when you plug in a probe
since the EA100 only searches for attached devices when it is initially turned
on.
Once you have securely inserted the probe into the EA100, turn the EA100 on
by pressing the red [ON/OFF] key.
Press the [MODE] key and you will see MULTIMETER in the lower left
corner.
The EA100 immediately begins collecting data using the probe and the
collected data can be read directly from the EA100 screen.
Press [HALT] when you have completed your data collection.
When in Multimeter mode you can only read the collected data directly from the
screen and the data cannot be sent to the graphing calculator when you are
working in Multimeter mode. Since the Multimeter is the simplest way to get an
initial probe reading, it is a good place to allow students to practice data collection
using various probes. Students will also need to organize the data they collect by
using a list or a table, and just writing down what the EA100 reads out to them.
For instance, you could use the Multimeter mode to collect data using the light
sensor probe. You could have a student stand at various distances from a single
light source and collect the readings from the EA100. Students could construct a
table with two columns, one listing the distances from the light source and the
other listing the data readouts from the Multimeter.
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