Metrohm tiamo 1.2 Manual - Handbuch (Seite 421)

Commands 395
Note
You can use the switch-off time in the following way to calculate the maximum
stop drift to be used: the size of the last increment to be added depends on the
volume of the attached exchange unit. With a 20 mL exchange unit (10'000 pul-
ses per cylinder volume) – number of impulses depends on the dosing device –
the smallest possible increment is 2 µL. With a delay time of 5 s this means that
the last 2 µL of reagent to be added must be sufficient for 5 s or longer. This re-
sults in a drift of ≤ 2 µL/5 s ≤ 24 µL/min. The drift can be smaller than 24 µL/min
as we do not know whether the last increment would also have been sufficient
for 10 s. This means that if you have previously worked with a 20 mL exchange
unit (10'000 pulses per cylinder volume) and 5 s switch-off delay then you should
set a value of ≤ 24 µL/min as the stop drift.
Stop time
1 ... 999999 s (only 720, 736, 751, 758, 784, 795, 799)
The titration is stopped if the defined stop time has elapsed. This parameter
is only shown for
Stop criterion = time and Delay time = inf.
Endpoint 2
(only visible for EP1 bei ≠ off )
[ on ], off
Switching endpoint 2 on/off. If this is deactivated all following parameters
are not visible.
EP2 at
-2000.0 ... 2000.0 mV, [ off ] (Titrando),
-2000 ... 2000, [ off ] (Titrino)
Measured value for the second endpoint.
Parameters for endpoint 2 see above.
Titration parameters
Screenshot and parameters: see SET pH - Titration parameters
Stop conditions
Screenshot and parameters: see SET pH - Stop conditions
Conditioning
Screenshot and parameters: see SET pH - Conditioning