Hach-Lange TITRALAB 860_865 Reference Manual - Manual (Page 127)

Titra Lab ® TitraLab 860 and 865 Reference Manual
Page 127
IP reject The IP reject sets lower level of the slope of the titration curve for ac-
ceptance of an inflection point. Use the IP reject value to eliminate
weak inflection points.
To set the appropriate IP reject value, display the derivative curve of
the titration and find the IP reject value as shown below:
Figure 22: IP reject
Enter in:
Parameters menu of a Monotonic IP or Dynamic IP method.
Range available:
1 to 999 (unit = mV/ml or pH/ml)
IP>1 (result
indicator) Refer to "Result indicators", page 185 .
Iso pH pH at which the electrode potential is no longer temperature depend-
ant. The Iso pH is an electrode characteristic supplied with every
Radiometer Analytical electrode.
Values are normally between 6.3 and 7.3 pH
Enter in:
Edit Electrode > Calibration parameters menu
Range available:
0.00 to 14.00 pH
IP reject 2
d Potential (or d pH)/dVolume
IP reject 1
Volume
IP reject 3
IP reject 4
IP1
IP2
IP3
IP reject 1: 3 Inflection points found (IP1, IP2 and IP3)
IP reject 2: 2 Inflection points found (IP2 and IP3)
IP reject 3: 1 Inflection point found (IP3)
IP reject 4: no inflection point found
Direct curve
Derivative curve