PASCO PS-2169 Water Quality MultiMeasure Sensor - Manual (Page 11)

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M o d e l N o . P S - 2 1 6 9 EZ S c r e e n
11
One-point Calibration
A one-point slope calibration requires one known standard. For conductivity, use one
of the solutions in Appendix C. For dissolved oxygen, use 100% humidified air (see
“DO
2
Calibration” on page 7 for details).
1. From the Sensor field, select Water Quality.
2. From the Measurement field, select Dissolved Oxygen
(mg/L), Dissolved Oxygen (%), Conductivity (1X Probe), or
Conductivity (10X Probe).
3. Ensure that “Calibrate all similar measurements simulta-
neously” is not selected.
4. From the Calibration Type menu, select 1 Point (Adjust Slope
Only), if it is not already selected.
5. Place the probe in the known standard.
6. Enter the known conductivity or DO
2
concentration in the
Standard Value field for Point 2.
7. Observe the Present Sensor Measurement and wait until it
has stabilized. (For conductivity, ensure that the present mea-
surement is within the selected sensor range. If it is not, press a
button on the multi-sensor to select a higher range.)
8. Click the Read From Sensor button for Point 2.
9. Click OK to accept the new calibration.
Appendix B: EZ Screen
If you are using the Water Quality MultiMeasure Sensor with a PASPORT interface
connected to a computer, you can use EZ-Screen software instead of DataStudio.
When the sensor is connected to the computer through the interface (if DataStudio is
not running) a window automatically launches giving you the option of launching
EZ-Screen. In EZ-Screen, click the green arrow button to start data collection. Click
the Water Quality icon in the lower-right corner to cycle through temperature, dis-
solved oxygen, probe voltage, conductivity, and pH measurements.
Click to start
data collection
Click to change
measurements
EZ-Screen