Clemson Biology Project
Appendix 2
EA100-2
The EA100 Keypad
There are eight keys located on the EA100. Below is a brief description of the
primary function of each of the keys.
[SHIFT] Used to activate the yellow print above the function keys. For example, to
activate SET UP, located above the MODE key, you would press the
[SHIFT] key then the [MODE] key.
[CH-View] This key is used to switch between various channel displays, CH1, CH2,
CH3, SONIC, DIG IN, or DIG OUT, when you are using more than one probe at a time.
[HALT] Pressing this key will stop or halt the sampling in mid-task and will get
you out of the data log setting (collecting data) and back to the communications mode
(interacting with the calculator).
[ON/OFF] This red key turns the power on and off. The EA100 has an auto power
shut-off feature. If it shuts off automatically, it can restart/ boot-up as data becomes
available for input.
[MODE] Mode switches you between the collecting data and communicating with
the calculator. There are two collection modes, Multimeter and Data Log, and one
communication’s mode, Transferring Data to a Casio graphing calculator.
[INTERNAL] This is used to measure the internal voltage created by the 4 AA batteries,
to determine if you need to replace the batteries or not. The reading should be around 6
volts.
[DataLOG] This button is used to enter the data log area, where sample rate and
number of samples are important. Repetitive selections of the [DataLOG] button while in
the data log mode also allows you to move from choice to choice for sample rate, and
number of samples. How to utilize this for your problems will be explained in greater
detail in a later section on the data log mode.
[TRIGGER] The trigger key is used to start the EA100 for sampling data. It is also used
to select sample rate and number of samples when in the data log mode.
Three of the keys have gold words above them. These keys serve in two
capacities. The word on the key is its primary function and the gold word above the key
is its secondary function. The secondary function can only be activated when used in
conjunction with the gold [SHIFT] key. The "gold" secondary keys are described below.
[RESTART] This key, activated by pressing [SHIFT] [HALT] will use the previously selected settings
for sample rate and numbers of samples, and then allow you to restart the sampling.
[SET UP] This key, activated by pressing [SHIFT] [MODE], enters the set up mode for configuring
the EA100 for manual stand-alone sampling.
[XMIT-9800] Pressing [SHIFT][INTERNAL] sends data to the Casio FX-9800G graphing calculator.
(We will not use this key since we are using the FX2.0 graphing calculator.)
Two of the keys have grey words above them. The grey words represent the
secondary functions for those two keys as well. The secondary use of these keys is not
activated by using another key but rather by entering into a particular mode of the
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