Metrohm 756 KF Coulometer - Manual (Page 35)

3.6 Parameters, key <PARAM>
756/831 KF Coulometer, Instructions of Use 27
3.6 Parameters, key <PARAM>
The key <PARAM> is used to enter mode-specific
parameters. Values marked with
cond.
are accessible
during conditioning, while
**titr
. means that these
values can also be altered during the titration. In this
case they will influence the run being carried out. All
other values can only be altered in the inactive basic
status.
Two different operating modes are available: standard
mode and expert mode. Inquiries which appear in the
standard mode are highlighted in gray.
The Coulometer displays are shown below at the left-
hand side. The values are the default values.
Control parameters (only in expert mode):
Control parameters for EP.
Titration parameters
Influence the course of the titration.
Statistics:
Mean values and standard deviations of the calculated
results, see page 37.
Preselections:
Selection of various auxiliaries: Automatic inquiries after
the start, etc.
>control parameters
EP at U 50 mV
dynamics 70 mV
**titr.
max.rate max. ug/min
**titr.
min.rate 15 ug/min
**titr.
Control parameters
Endpoint (0.. ±2000 mV)
The standard value should be suitable for most
applications.
Control range 0...2000 mV):
Input as distance to endpoint. Outside the control
range iodine will be produced continuously.
Maximum rate (1.5...2240 ug/min, max.)
<CLEAR> sets
max
.
This parameter primarily determines the rate outside
the control range.
Minimum rate (0.3...999.9 ug/min, min.)
<CLEAR> sets
min
. = 0.28 ug/min.
This parameter determines primarily the rate at the
beginning and at the end of the titration.
parameters
>control parameters
>titration parameters
>statistics
>preselections
PARAM