Metrohm 794 Basic Titrino User Manual
Page 41
2.7 Parameters, key
794 Basic Titrino
37
min.rate 25.0 µl/min
**titr.
stop crit: drift
**titr.
stop drift 20 µl/min
**titr.
t(delay) 10 s
**titr.
stop time OFF s
**titr.
Minimum dosing rate (0.01...999.9 µL/min)
This parameter determines the addition rate right at the
start and the end of the titration, see also page 42.
This parameter influences the titration speed and
therefore its accuracy very strongly: A smaller min.rate
results in a slower titration.
Type of stop criteria (drift, time)
Titration stops if EP is and stop drift is reached. (1...999
µL/min)
Titration stops if there is no dosing during t(delay).
(0...999 s, INF)
Switch off when the end point is reached and the set
time after the last dispensing has elapsed.
If "INF" is set, an inquiry regarding the stop time
appears.
If t(delay) is "INF"
Stop after a time (0...999999 s, OFF)
Stop after the set time after the start of the titration.
"OFF" means no stop, i.e. titration for an "infinitely" long
time.
>titration parameters
titr.direction: auto
start V: OFF
cond.
start V 0.0 ml
cond.
factor 0
cond.
dos.rate max. ml/min
**titr.
General titration parameters
Direction is set automatically (+, -, auto)
auto: The direction is set automatically by the Titrino
(sign [U
first
- EP]).
+:
Direction of higher pH, higher voltage (more
"positive"), larger currents.
- :
Direction of lower pH, lower voltage, smaller
currents.
The titration direction is fixed if two EP's are set. In this
case, an input for titration direction has no meaning.
Type of start volume (OFF, abs., rel.)
"OFF":
start volume switched off
"abs.":
absolute start volume in mL
"rel.":
relative start volume to sample size.
If "abs." is set:
Absolute start volume (0...999.99 mL)
If "rel." is set:
Factor for relative start volume (0...±999999).
Calculated as: start V (in mL) = factor∗sample size
Dosing rate for start volume
(0.01...150 mL/min, max.)
The maximum rate depends on the Exchange Unit: