Hanna Instruments HI 901 - Manual (Page 61)

5-21
METHODS
The valid pre-titration volume is between the ranges shown below:
0.001 to 4.500 mL for a 5 mL burette
0.001 to 9.000 mL for a 10 mL burette
0.005 to 22.500 mL for a 25 mL burette
0.005 to 45.000 mL for a 50 mL burette
If no pre-titration volume is used, 0.000 mL should be entered.
Note: A pre-titration volume is highly recommended whenever possible. When fewer linear
doses are used the overall titration duration considerably shortens.
5.5.6 Pre-Titration Stir Time
When this option is enabled, the sample is mixed for a period of time before the titration
begins. This allows the sample to become homogeneous.
The range is from 0 to 180 seconds.
If 0 seconds is entered, the Pre-Titration Stir Time option is disabled.