Carolina NeuLog Nitrate Ion-Selective - Manual (Page 4)

NEULOG NITRATE SENSOR GUIDE
7. Click the “Load data from sensors” button.
8. Select which experimental data to upload. (5 experimental runs can be
stored at one time on the NUL-241 nitrate sensor)
Restoring sensor’s factory default settings:
Procedure:
1. Connect the USB-200 to a PC, Mac, tablet, or smart device.
2. Connect the nitrate sensor to a USB-200 module (they directly plug
together).
3. Open the NeuLog software.
4. Click the “Tools” icon.
5. Click “Restore sensor’s factory defaults” icon.
6. If prompted to clear the graph, click either the “Off-line experiment” or “On-
l
ine experiment” (whichever you are using).
7. Click “Clear experiment results”.
8. Resume from step 4.
Included with sensor:
 NeuLog NUL-241 Nitrate Sensor Guide (this document).
 NeuLog nitrate (NO
3
- ) sensor electrode.
 Nitrate (NO
3
- ) Ionic Strength Adjuster (ISA)
 Nitrate (NO
3
- ) 1000 ppm standard
Sensor specifications
Mg/L Ppm
Range and
operation modes
0.1 to 14,000 0.1 to 14,000 as N
ADC resolution 14 bit
Resolution
0.1 at 0.1 to 1,000
mg/L
98 mg/L at 1,000
to 14,000 mg/L
1 ppm
Max sample rate
(S/sec)
100
Sensor features:
 Fully digital data.
 Rugged plastic ergonomic case.
 PermaFil ion selective electrode.
 Nitrate probe connected to the sensor body by a flexible rubber-coated wire.
 Protective hard-plastic storage cap.
 Push button switch for Start/Stop experiments in off line mode.
 LED indicator of experiment status (blinks while collecting data).
 Note: NeuLog products are intended for educational use.
Videos and experiment examples:
 Videos, literature and other probes can be found at www.NeuLog.com
 http://www.NeuLog.com/Products/NitrateloggerSensor.aspx
Technical background:
The philosophy behind NeuLog’s plug and play technology is based on each sensor’s
ability to store its own data due to an internal flash memory chip and micro-controller
in each plastic NeuLog body. This technology allows the sensor to collect and then
store the digital data in the correct scientific units (
o C, o F, Lux, %, ppm, for example).
The sensor is pre-calibrated at the factory. The built-in software in the logger can be
upgraded for free at any time using the provided firmware update.
The nitrate sensor uses a permanently filled ion selective electrode to accurately
measure the amount of nitrate ion in a solution. Nitrate ions interact directly with a
specialized electrode membrane at the end of the probe. When the ions interact with
the electrode’s membrane a small voltage is generated. This voltage is compared
against the voltage in the internal reference electrode and measured using an internal
voltmeter. Once the voltage is measured, a nitrate ion concentration is calculated
using the sensors software.
The Ionic Strength Adjustor (ISA) is used to standardize the strength of the ions in
various solutions to give the most accurate readings.