Metrohm 726 Titroprocessor - Manual (Page 65)

4. Manual operation Manual operation
726 Titroprocessor, Instructions for use 59 59
Measuring parameters
Signal drift
Limits for signal drift
0.5…2…999 mV/min | off
The measurement is only accepted if the measurement
change of the sensor falls below the preset value for the
signal drift. If this is delayed, the measurement will
nevertheless be accepted when the preset equilibration
time (see below) has elapsed.
This signal drift control can be switched off ('off').
However, this cannot be recommended for correct
calibration.
Equilibr.time
Max. equilibration time before measurement
acceptance
0.1…9999 s | auto | off
The whole equilibration time for measurement
acceptance is only effective when, with drift control
switched on (see signal drift above), the preset value for
signal drift is not undercut. Otherwise the measurement
is accepted as soon as the preset signal drift is
achieved.
The whole equilibration time will also be allowed to
elapse if the drift control is switched off.
The equilibration time can be switched off. This means
that only the signal drift is decisive for measurement
acceptance.
In the setting ‘Equilibr.time auto' the
Titroprocessor will calculate an equilibration time suited
to the preset value for the signal drift according to the
following equation:
Equilibr time in s
drift mV
. ( )
/ ( / min) ,
=
+
+
150
0 01
5
For the standard setting 2 mV this results in an
equilibration time of 110 s.
Temperature
Temperature setting or measuring mode
-170…25.0…500°C | auto | off
The temperature can be determined during a
measurement with the help of a Pt100/Pt1000 sensor or
a combined electrode with built-in temperature sensor.
It is required for automatic pH correction.
numeric manual input
auto automatic measurement during the
calibration
off no temperature correction