Xylem YSI ProDSS, User Manual

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43
Calibration
Turbidity Calibration 1-, 2- or 3-Point
NOTE: The sensor guard must be installed for the turbidity sensor
calibration.
NOTE: When performing a turbidity calibration, the first point must
be zero. Select Calibration Value and enter 0.00.
1.
Perform the “Calibration setup (pH, ORP, ISE, conductivity, turbidity,
and total algae sensors)” on page 33 . Rinse the sensor 2-3 times
with a small amount of 0 FNU (NTU) standard.
2. Fill the calibration cup to the appropriate level with 0 FNU (NTU)
standard (clear deionized or distilled water is suitable). Immerse
the sensors into the water.
NOTE: With the calibration cup empty (i.e. no sensor guard or
sensors), filling the calibration cup to line 1 will provide a
sufficient amount of solution for calibration.
3.
Push the
Cal
key, then select
Turbidity
.
4. Select Calibration Value and enter 0.00.
5. Observe the actual measurement readings for stability (white line
on graph shows no significant change for 40 seconds), then select
Accept Calibration . “Ready for cal point 2” will be displayed in the
message area.
6. Select Finish Calibration to complete a 1-point calibration or
continue for the 2- or 3-point calibration.
7.
Rinse the sensors, calibration cup, and sensor guard 2-3 times with
a small amount of standard #2. Discard the standard after each
rinse.
8. Fill the calibration cup to the appropriate level with standard #2.
Immerse the sensors in the second calibration standard.
9. Select Calibration Value and enter the value of the second
calibration standard.
10. Observe the actual measurement readings for stability (white line
on graph shows no significant change for 40 seconds), then select
Accept Calibration ( Figure 55 ). “Ready for cal point 3” will be
displayed in the message area.
11.
Select
Finish Calibration
to complete a 2-point calibration or
continue for the 3-point calibration.
12. Rinse the sensors, calibration cup, and sensor guard 2-3 times with
a small amount of standard #3. Discard the standard after each
rinse.
13. Fill the calibration cup to the appropriate level with standard #3.
Immerse the sensors in the third calibration standard.
14. Select Calibration Value and enter the value of the third
calibration standard.
15.
Observe the data points readings for stability, then select
Accept
Calibration
. “Calibration successful!” will be displayed in the
message area.
16. Rinse the sensors in clean water then dry.
Figure 55 Calibrate Turbidity