Hanna Instruments HI 904 - Manual (Page 76)

5-18
METHODS
5.5.10.4 Imposed Current
The HI 904 uses a bivoltametric indicating electrode system. During a titration, the titrator
monitors the voltage required to maintain a constant polarization current (imposed current).
This option allows the user to select the electrode polarization current from the predefined list.
Note: Higher polarization currents will speed the contamination of the electrode and
potentially degrade samples.
5.5.10.5 End Point Value
This option defines the mV value at which the titration equivalence point (endpoint) has been
reached.
The pre-titration is completed when the mV is under the endpoint value, for a user defined
period of time (see Section
5.5.11.4, Endpoint Stability Time).
The mV value can be set from 5.0 to 600.0 mV.