Metrohm 781 pH/Ion Meter - Manual (Page 80)

6.4 Potential measurement (U mode)
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state: ON, OFF
u.limit -2200.0...1000.0...2200.0 mV
u.hyst. -2200.0...2.0...2200.0 mV
l.limit -2200.0...-1000.0...2200.0 mV
l.hyst. -2200.0...2.0...2200.0 mV
The exact way in which the limits function works is described in Sec-
tion 7.4 independent of the mode.
6.4.3 Plot parameters
PARAMETER U
:
├
plot parameters
: ├
left mar.
└
right mar.
The measured potential can be printed out as a function of time in a
plot. Under CONFIG/print meas.value the print criterion ' plot '
must be selected (see Section 5.2). The scales of the measured values
axes are determined by the following limits.
Left mar. -2200.0...-1000.0...2200.0 mV
Right mar. -2200.0...1000.0...2200.0 mV
TIP !
The value for the right-hand limit of a plot must not necessarily be the
larger one. By exchanging the limits the plot can be mirrored.
6.4.4 Preselections
PARAMETER U
:
└
preselections
└
req.ident
req.ident: id1, id1 & id2, OFF
For sample identification you can document each measured value with
two Ids in the report header. These can either be predefined under
CONFIG/report and included in each report or, depending on the Pre-
selection setting, they can be requested before each measurement.
Please note that sample identifications requested as a preselection be-
fore the measurement will also be stored as an entry under CON-
FIG/report . This means that they are again available for the next
measurement.