Metrohm tiamo 1.0 Manual - Manual (Page 437)

Commands 413
Note
A constant measured value is often only achieved after a certain time, as mixing
and possibly the reaction itself require a certain time. The response time of an
electrode can also increase with time, i.e. reaching a constant measured value
takes longer and longer. In such a case
drift-controlled measurement is par-
ticularly advisable, as the measured values are only accepted when equilibrium
has almost been achieved.
Measurement with drift control
[ on ], off
The measurement is carried out drift-controlled if this option is enabled. The
measurement is stopped as soon as the
Signal drift or the Stop measured
value pH is reached or a waiting time has elapsed. The corresponding pa-
rameters are not visible if this option is disabled.
Signal drift
0.1 ... [ 10.0 ] ... 999.0 mV/min (Titrando)
0.5 ... [ 10.0 ] ... 999.0 mV/min (Titrino)
The measured value is only accepted if the signal drift defined here has
been fallen short of.
Min. waiting time
[ 0 ] ... 999'999 s (Titrando only)
The measured value is only accepted if the minimum waiting time has
elapsed even if the signal drift has already been reached. The drift contin-
ues to be checked as the minimum waiting time is passing.
Max. waiting time
0 ... [ 52 ] ... 999'999 s (Titrando)
0 ... [ 52 ] ... 9'999 s (Titrino)
If the signal drift has not yet been reached then the measured value will be
accepted when the maximum waiting time has elapsed. If no new entry for
the waiting time has been made then a suitable value for the drift will be
calculated automatically according to the following equation:
Measuring interval
0.1 ... [ 2.0 ] ... 999'999.0 s (Titrando, increment = 0.1 s)
0.08 ... [ 2.0 ] ... 16'200 s (Titrino, increment = 0.08 s)
Time interval for entering a measuring point in the list of measuring points.
Stop measured value pH
-20.000 ... 20.000, [ off ] (Titrando only)
Stops when the preset measured value has been reached since the start of
the measurement.
off means no stop.
Measurement without drift control
[ on ], off
The measurement is carried out without drift control if this option is en-
abled. The measurement continues until one of the stop criterions
Measur-
ing time or Stop measured value pH is met. The corresponding parameters
are not visible if this option is disabled.
Measuring time
0 ... [ 120 ] ... 999'999 s
Maximum period of time for measurement.
Measuring interval
0.1 ... [ 2.0 ] ... 999'999.0 s (Titrando, increment = 0.1 s)
0.08 ... [ 2.0 ] ... 16'200 s (Titrino, increment = 0.08 s)
Time interval for entering a measuring point in the list of measuring points.