PASCO PS-3224, Product Manual

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Calibr Calibration ation
The Wireless Optical Dissolved Oxygen Sensor is calibrated at the
factory and does not need to be recalibrated under most
circumstances. If needed, the sensor can be calibrated using one or
two known standards.
Pr Prepar epare the calibr e the calibration standar ation standards ds
Prepare calibration standards that contain 0% and 100% dissolved
oxygen saturation. Either water-saturated air (recommended) or air-
saturated water can be used for the 100% dissolved oxygen
saturation standard.
• 100% dissolved oxygen saturation standard (water-saturated air)
100% dissolved oxygen saturation standard (water-saturated air)
Moisten the sponge inside the end of the rubber boot with water.
Loosely cover the sensor cap with the rubber boot. Let the sensor
acclimate for about 15 minutes. Leave the boot on during
calibration.
• 100% dissolved oxygen saturation standard (air-saturated water) 100% dissolved oxygen saturation standard (air-saturated water)
Connect an air stone to an air pump and put the air stone into a
beaker of water. Let the air pump to run for about 10 minutes.
• 0% dissolved oxygen saturation standard 0% dissolved oxygen saturation standard
Pour 150 milliliters of distilled water in a beaker. Dissolve sodium
sulfite, sodium bisulfite, or potassium sulfite until a small amount
remains undissolved in the bottom of a beaker.
Calibr Calibrate the sensor using one standar ate the sensor using one standardd
Use a 100% dissolved oxygen saturation standard to calibrate the
dissolved oxygen sensor.
SP SPARK ARKvue vue
1. Click .
2. Click for DO DO
22
Saturation Saturation.
3. Under Calibration Type Calibration Type, select 1 point (Adjust Slope Only) 1 point (Adjust Slope Only) then
click Continue Continue.
4. Put the sensor in a 100% dissolved oxygen saturation standard.
5. Under Standard Value
Standard Value enter
100
then click Set Calibration Set Calibration.
6. Click OK OK.
P PASCO Capst ASCO Capstone one
1. In the Tools Tools palette, click Calibration Calibration .
2. Select Saturation Saturation then click Next Next.
3. Select One Standard (1 point slope) One Standard (1 point slope) then click Next Next.
4. Put the metal sensor body in a 100% dissolved oxygen saturation
standard.
5. Under Standard Value Standard Value, enter
100
then click Set Current Value to Set Current Value to
Standard Value Standard Value.
6. Click Finish Finish.
Calibr Calibrate the sensor using two standar ate the sensor using two standards ds
Use a 0% and 100% dissolved oxygen saturation standards to
calibrate the dissolved oxygen sensor.
SP SPARK ARKvue vue
1. Click .
2. Click for DO DO
22
Saturation Saturation.
3. Under Calibration Type Calibration Type, select 2 point (Adjust Slope and Offset) 2 point (Adjust Slope and Offset)
then click Continue Continue.
4. Put the metal sensor body in a 0% dissolved oxygen saturation
standard.
5. Under Calibration Point 1 Calibration Point 1, enter
0
for the Standard Value Standard Value then
click Set Calibration Set Calibration.
6. Put the sensor in a 100% dissolved oxygen saturation standard.
7. Under Standard Value
Standard Value enter
100
then click Set Calibration Set Calibration.
8. Click OK OK.
P PASCO Capst ASCO Capstone one
1. In the Tools Tools palette, click Calibration Calibration .
2. Select Saturation Saturation then click Next Next.
3. Select Two Standards Two Standards then click Next Next.
4. Put the metal sensor body in a 0% dissolved oxygen saturation
standard.
5. Under Standard Value Standard Value, enter
0
then click Set Current Value to Set Current Value to
Standard Value Standard Value.
6. Put the metal sensor body in a 100% dissolved oxygen saturation
standard.
7. Under Standard Value Standard Value, enter
100
then click Set Current Value to Set Current Value to
Standard Value Standard Value.
8. Click Finish Finish.
Set the salinity constant Set the salinity constant
The salinity of water can have an effect on the dissolved oxygen
measurement. A value can be entered for the salinity of the water
sample to account for this effect.
Note: Note: It is recommended to use the PASPort Salinity Sensor
(PS-2195) to obtain a precise salinity measurement.
SP SPARK ARKvue vue
1. Click .
2. Click for the Wireless Optical Dissolved Oxygen Wireless Optical Dissolved Oxygen sensor.
3. Under Salinity Salinity, enter a value in ppt.
P PASCO Capst ASCO Capstone one
1. Click Hardware Setup Hardware Setup .
2. Click for the Wireless Optical Dissolved Oxygen sensor.
3. Under Salinity Salinity, enter a value in ppt.
4 | Wireless Optical Dissolved Oxygen Sensor