Carolina NeuLog pH User Manual
Neulog ph sensor guide
NEULOG PH SENSOR GUIDE
NeuLog pH sensor
NUL-206
The pH Sensor can be used for any science experiment or activity where pH readings
are required some fields of study include Chemistry, Pharmacology, Biochemistry,
Biology, Earth Science, Environmental Science, etc.
Just a few of the thousands of possible experiments that can be done with the NUL-
206 sensor are: Monitoring of ecological systems, effect of pH on enzymes, static pH
measurements, chemical reactions with changing pH such as titrations, waste
measurements, water testing, etc.
The unit of measurement for this sensor is the pH scale.
pH: The universal measurement for pH which directly measures the
concentration of hydrogen ions using the scale of 0 to 14.
Sensor calibration:
Through usage, the pH probe deviates slightly from its stored voltage value
corresponding to a pH of 7 (the offset voltage). The conversion formula must be
adapted to this change by calibrating the pH sensor to a pH 7 buffer solution. After
calibration, the information will be stored for later testing. For the most accurate
readings, recalibrate regularly prior to experimentation.
Materials Needed:
1 of the following (depending on experiment type)
o
(For On-line experiments)
o
(For Off-line experiments)
o
Viewing Module and BAT-200 Battery (For use with
Neulog Viewer)
Procedure:
1.
The pH Sensor needs a voltage source to properly calibrate so connect the
pH Sensor to:
a.
For On-line experiment
b.
For Off-line experiment
c.
For use with the Neulog Viewer:
2.
Remove the pH Sensor probe‟s tip from the plastic storage solution bottle.
3.
Rinse the pH Sensor‟s tip with distilled water.
4.
Insert pH Sensor‟s tip into pH 7 buffer, if no buffer is available you can use
tap water (although it is not as accurate).
5.
The sensor now needs to be calibrated:
a.
For On-line experiments:
i. Connect the pH Sensor to the left side of a USB-200
Module (which is connected to a computer via the USB
to mini USB cable.)
ii. Open the Neulog software
iii. Once the pH Sensor
is detected click the “Module
setup” button.
iv.
Click the “Calibration icon” (looks like a scale) to
automatically calibrate
b.
For Off-line experiments and for use with Neulog Viewer:
i.
Press and hold the pH Sensor‟s push button for 3
seconds
6.
The pH Sensor is now calibrated for use.
Quick start procedure:
PC or Mac Computer
Materials needed:
A USB to mini USB cable (which comes with the USB-200)