Hach-Lange TITRALAB 840_845 User Guide - Manual (Page 58)

58 Chapter 3
• Monotonic IP (Inflection point detection with incremental addition
of the titrant, increments of equal size)
• Dynamic IP (Inflection point detection with incremental addition
of the titrant, increments of varying size)
b. Select the measurement mode: pH, mV or mV at imposed current.
c. Select the way the temperature is to be measured.
• Probe: temperature sensor is required during measurements.
• Entered: temperature is to be entered manually using the
keypad.
• Fixed 25°C: measurements are assumed to be performed at
25°C.
d. Enter the Number of tests, i.e. the number of times the
method is to be repeated.
e. If you want a message to be displayed upon starting the method,
select Notification = Yes then enter the message (3
lines of 32 characters maximum).
f. Select the way the cell grounding of the measuring electrode will be
performed:
• Reference: reference electrode connected to the Ref
socket on the titration system.
• Metal: metal electrode connected to the GND socket on the
titration system. For titrations in very resistant medium.
• Other: an electrode which does not belong to the electrode
system.
g. Blank: A blank or blank sample is usually a solvent used to dissolve
or dilute the sample. This blank may contain traces of the species
you are analysing. Select Yes for Blank when you want to
subtract the volume of titrant used to titrate the solvent from the
volume found for the dissolved or diluted sample.