Metrohm 756 KF Coulometer - Manual (Page 36)

3.6 Parameters, key
756/831 KF Coulometer, Instructions for Use 28
stop crit: rel.drift
**titr.
stop drift 5 ug/min
**titr.
rel.drift 5 ug/min
**titr.
Type of stop criteria (drift, rel.drift)
Drift: the entered value corresponds to the stop drift.
rel.drift: the stop drift is calculated according to the
"actual drift at start of titration + entered value, see
page 32.
If
Drift
has been set:
Switches off titration when EP and stop drift have been
reached (1...999 ug/min)
If
rel.drift
has been set:
Switches off titration when EP and corresponding drift
have been reached (0...999 ug/min)
>titration parameters
pause 0 s
**titr.
extr.time 0 s
**titr.
start drift 20 ug/min
I(pol): 10 uA
electrode test: ON
temperature 25.0 °C
cond.
time interval 2 s
cond.
max.titr.time OFF s
**titr.
Titration parameters
Pause (0...999 999 s)
Waiting period in which no iodine is produced. The
pause can be terminated with .
Extraction time (0...999 999 s)
The titration takes place during this time. However, it is
not stopped until the extraction time has elapsed (even
when the EP has been reached). The extraction time
can be terminated with .
Start Drift (1...999 ug/min)
Drift value below which the start of the titration is pos-
sible (conditioning OK), see page 32.
Polarization current (2, 5, 10, 20, 30 uA),
at the indicator electrode. The set standard value
should be optimal for most applications, see also page
32.
Electrode test (OFF, ON)
Performed on changeover from the inactive standby
state to a measurement.
OFF
means that the test is not
performed.
Titration temperature (-170.0...500.0 °C)
for the documentation of titration conditions.
Time interval (1...999 999 s)
Time interval for acquisition of a measured value into
the measuring point list.
Maximum titration time (1...999 999 s, OFF)
Safety time for termination of the titration even when
the EP has not been reached.
The titration time corresponds to the time in which con-
trol is carried out, i.e. inquiries after the start without
control and pause periods are not included in this
time.