YSI ProDSS - Manual (Page 47)

45
Calibration
Figure 55 Calibrate ISE
ISE calibration 3-point
1. Perform the Calibration setup (pH, ORP, ISE, conductivity, turbidity)
on page 33 .
2. Fill the calibration cup to fill line one with standard #1
(approximately 170 mLs).
3. Push the Cal key, then select the applicable ISE sensor.
4. Carefully immerse the sensors into the standard solution.
5. Allow the temperature of the standard to stabilize, then select
Calibration value. Enter the calibration value that corresponds to
standard #1.
6. 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 2” will be
displayed in the message area.
7. Rinse the sensor 2-3 times with a small amount of standard #2.
8. Rinse, then fill the calibration cup to fill line one with
standard #2 (approximately 170 mLs).
9. Carefully immerse the sensors into the solution.
10. Allow the temperature of the solution to stabilize then select
Calibration value. Enter the calibration value that corresponds to
standard #2.
11. 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.
12. Rinse, then fill the calibration cup to fill line 1 with standard #3
(approximately 170 mLs).
NOTE: To calibrate with a chilled third standard, see Chilled third
calibration point on page 46 .
13. Carefully immerse the sensor into the solution. Allow the
temperature of the solution to stabilize then select Calibration
value. Enter the calibration value that corresponds to standard #3.
14. Observe the actual measurement readings for stability (white line
on graph shows no significant change for 40 seconds), then select
Finish Calibration. “Calibration successful!” will be displayed in
the message area.