YSI 6000UPG - Manual (Page 41)

3-9
Dry the sonde and probes carefully and then place the sonde in approximately 300 mL of the second
turbidity standard (100 NTU is suggested). Input the correct turbidity value in NTU, press Enter,
and view the stabilization of the values on the screen in real-time. As described above, if the
readings appear unusually high or low or are unstable, activate the wiper to remove bubbles and be
sure to wait at least 40 seconds before confirming the calibration. After the readings have
stabilized, press Enter to “confirm” the calibration and then, as instructed, Hit any key to return to
the Calibrate menu.
Thoroughly rinse and dry the calibration cups for future use.
CAUTION: If the turbidity system has been set up as outlined in Section 2 of the manual, signal
averaging will be taking place during calibration and the response time of the sensor will be slightly
slower than that of the other sensors. This effect makes it critical to observe at least 40 seconds of
stable readings prior to “confirming” the calibration. Be particularly careful to take your time
during the calibration of the turbidity system.
3.3 DISCRETE SAMPLING
To start taking readings with your 6000 UPG, use the Discrete sampling mode to turn on or turn off
the continuous sampling function. Data will be displayed to the screen and optionally saved to
internal flash disk memory or to a computer or logger display.
Select 1. Run from the sonde Main menu. The Run menu will be displayed.
Select 1. Discrete sample from the Run menu. The Run Discrete sample menu will be displayed.
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Run
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1. Discrete sample
2. Conditional Sample
3. Unattended sample
Select option (0 for previous menu):
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Discrete-sample
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1. Start sample
2. Site description
3. Sample interval
4. Close file
5. Set Auto-stop timer
Select option (0 for previous menu):