Overview
The DO2N-200E is a current to voltage adapter designed to work with a
Clark-style oxygen electrode. This adapter delivers a polarizing voltage of
-0.8V to the electrode to create a current, or flow of electrons, between the
silver and platinum elements in the electrode. The flow of electrons between
these elements increases and decreases as the concentration of oxygen in the
polarograph chamber increases and decreases, respectively. The adapter then
converts the changes in current to changes in voltage so that they can be
recorded.
Be sure to go to (
www.ni.com/minisystems to download software and courseware for your sensors.
Specifications
|
9 |
+/-5V |
|
Calibration |
Required every use |
|
Default scaling Value |
Water =
20%
Diet Soda = 0% |
Calibration Instructions
1. Install the IX-ELVIS board into the National Instrument ELVIS platform or
the IX-myDAQ board onto the NI myDAQ. If using ELVIS, connect the ELVIS power
supply to the ELVIS unit and connect it to the computer via a USB cable. Ensure
both of the power switches are in the “on” position. For the myDAQ, connect it
to the computer using the USB cable.
2. Connect the MINI DIN7 connector of the DO2N-200E to either CH1 or CH2 of
either the IX-ELVIS or IX-myDAQ board.
3. Open the recording software, select the channel that the DO2N-200E is
connected to and ensure the range is set to +/-5V. 4. Prepare 2 beakers, 1 with
fresh diet soda and 1 with tap water. Ensure the volumes are the same.
5. Place the electrode of the DO2N-200E in the beaker with the water. Once
the trace settles click Set for SP2 for 20 % dissolved oxygen.
6. Place the electrode in the beaker with the diet soda. Once the trace
settles click Set for SP1 for 0 % dissolved oxygen.
*Note: The signal may be inverted if the IX-MYDAQ is used.
Measurement Instructions
1. Follow the calibration procedure above.
2. Set up the desired experiment and press record.
*Note: The signal may be inverted if the IX-MYDAQ is used.
