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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