Casio fx9750GII Getting Started page 73

CONNECTION TO OTHER DEVICES
A number of devices can be connected to the FX9750GII and other CASIO graphic calculators via the EA-200 data
logger. [Previous data logger model EA-100 is also described as this data logger needs to have the data transferred
to the calculator using small programs to send the information to the data logger and to receive the data collected
back to the calculator for analysis. There are devices that can be used in supporting the use of the calculator in
the classroom, bringing real life data into the classroom for analysis, as with the EA-2 motion detector. These two
extensions can be easily attached to the G.C. and the information transferred to the STAT icon. Then use the
statistical functions to model the data.
Connect various sensors to the EA-100 and EA-200 Data Analyser to collect various data relating to physics,
chemistry, biology, and mathematics and analyse it with the graphic calculator.
1. Temperature Probe
The temperature probe that comes with the data analyser uses a thermistor to
measure the temperature of liquids. Changes in the temperature of the thermistor
causes a corresponding change in its resistance, which is then converted to a
temperature value.
2. Voltage Probe
The voltage probe that comes with the data analyser can be used to read a voltage
in the range of ±10 Volts. This probe is designed with Auto-ID resistance, so
connecting it to the data analyser automatically switches to voltage sampling. The
black probe should be connected to ground, while the red probe should be
connected to signal voltage.
3. Light Probe
The light probe that comes with the data analyser uses a photosensitive element
called a Cds to measure brightness, which is then converted to a numeric value.
The value produced does not correspond to any standard unit of measurement, but
simply indicates a relative measure of brightness in the range of 100 to 999.
4. Motion Detector
EA-2 is a sonar ranging device with a sensing range of 0.6 to about 8 meters. The
EA-2 emits ultrasonic pulses and detects pulses returned as echoes from the target.
It can be connected to the CASIO EA-100 data analyser to accumulate and analyse
data.
5. Other devices [Venier probes]
These can be purchased separately such as: Dissolved Oxygen Probe, Drop Counter;
EKG Sensor, Electrode Amplifier, Flow Rate Sensor, Force Sensors, Gas Pressure
Sensor, GPS Sensors, Gas Chromatograph, Hand Dynamometer to name a few.
Please consult the User manual for aligning other probes to 'hank shake'
An overview of the Data Logger.
The EA-100 Data Logger features: 6 Channels: 3 analog inputs, 1 ultra-sonic motion detector
input, 1 digital input, 1 digital output.
The unit automatically recognises the type of probe being connected to each channel. One
temperature probe, one light probe and one voltage probe are included in the pack. Other
types of probes are available. You can measure motion, temperature, light, force, sound, pH
and more with the use of appropriate probes. The Data Logger allows for the display of data
from the specified channel during the sampling to confirm when sampling is taking place and
when the sampling has finished. You can collect data from up to five channels simultaneously
(The 6th is reserved for time). The unit can collect data at rates of up to 10,000 data points
per second for up to 250 data points (maximum entry for each column in STAT or LIST icon
is 250 data values) per channel.
fx9750GII
cont. on next page
CHAPTER 9 | PG 73