Metrohm tiamo 1.2 Manual - Handbuch (Seite 453)

Commands 427
• Filling rate with different cylinders
When you use two dosing devices with different cylinder volumes (Dosing
cylinder 2 > Dosing cylinder 1) the filling rate of the larger cylinder must be
at the minimum:
Filling rate 2 >= Filling rate 1 • (V
Dosing cylinder 2
/ V
Dosing cylinder 1
)
• Rule for dosing rate
The dosing rate must not exceed 75 % of the filling rate of the smaller cylin-
der. This corresponds to the following values (at the maximum filling rate):
Cylinder volume Max. dosing rate Max. flow rate
Exchange unit Dosing unit Exchange unit Dosing unit
1 mL 2.25 mL/min --- ca. 130 mL/h ---
2 mL --- 5.00 mL/min --- ca. 300 mL/h
5 mL 11.25 mL/min 12.50 mL/min ca. 670 mL/h ca. 750 mL/h
10 mL 22.50 mL/min 25.00 mL/min ca. 1.3 L/h ca. 1.5 L/h
20 mL 45.00 mL/min 50.00 mL/min ca. 2.7 L/h ca. 3.0 L/h
50 mL 112.50 mL/min 124.50 mL/min ca. 6.7 L/h ca. 7.5 L/h
Sensor
Measuring input
[ 1 ] ... 2 (835, 836, 842, 857)
[ 1 ] (855)
[ 1 ] ... 2, diff. (Titrino)
Selection of the measuring input to which the sensor is connected.
Sensor
Sensor name, [ pH electrode ]
Selection of a sensor of type pH electrode from the list of sensors defined in
the sensor table. The calibration data for the sensor will be adopted for the
determination.
Temperature measurement
Type of temperature measuring (only Titrando):
continuous
A temperature sensor must be connected. The temperature is measured
continuously.
[ automatic ]
If a temperature sensor is connected then the temperature will be meas-
ured continuously. Otherwise the manually entered Temperature (tab Titra-
tion parameters ) will used.
off
The temperature will not be measured. The Temperature (see Titration pa-
rameters) which has been entered manually will be used.
Stirrer
Stirrer
[ 1 ] ... 4, off (only Titrando)
Selection of the stirrer. off means that no stirrer will be used.
Stirring rate
-15 ... [ 8 ] ... 15 (only Titrando)
Setting the stirrer speed. The direction in which stirring takes place changes
as the sign in front of the stirrer speed changes.
Switch off automatically
[ on ], off (only Titrando)
If this option is enabled, the stirrer will be switched off automatically when
the command is finished.