Control instrument. Metrohm 900 Touch Control

29.3 Endpoint titrations (SET) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

29.3.6 Cell

The monitoring of the reagent used is activated or deactivated under

[Cell] .

Reagent monitoring

Selection of the reagent from the list of reagents. The selection depends on the titration mode. Reagents are defined under System ▶ Reagents .

Selection

Default value

Selection of configured reagents off

| off off

The reagent monitoring is not active.

29.3.7 Control instrument

The control instrument the determination is carried out with is selected under [Control device] . Control instruments are defined under System ▶ Device manager .

NOTICE

This button is only displayed when several control instruments have been configured.

Control device

Selection of the control instrument from the list of devices. Only those devices are displayed which are able to carry out the command. The control instruments do not have to be connected. This allows to transfer methods more easily from one system to another.

Selection Selection of configured control instruments

29.3.8 Sensor

The parameters for the sensor are edited under [Sensor] .

Measuring input

Selection of the measuring input the sensor is connected to. The selection is not dependent on whether the control device has one or two measuring interfaces.

Selection

Default value

1 | 2

1

320 ￭￭￭￭￭￭￭￭ 900 Touch Control

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Sensor

29 Parameters

Selection of the sensor from the sensor list. The selection depends on the measuring mode. Sensors are defined under System ▶ Sensors . You can also enter a sensor name which is not contained in the sensor list. When a determination is started there is a check whether the sensor is contained in the sensor list.

Selection Selection of configured sensors

I(pol)

The polarization current is the current that is applied to a polarizable electrode during voltametric measurement. This parameter is available only with I(pol) determinations.

The values that are actually adjustable may vary from the values specified here, depending on the hardware. The binding values can be found in the

Technical specifications chapter for the control instrument used.

Input range

Default value

Selection

–125.0 to 125.0 µA (Increment: 2.5)

5.0 µA

–1.0 µA | 1.0 µA

U(pol)

The polarization voltage is the voltage applied to the polarizable electrode during an amperometric measurement. This parameter is available only with U(pol) determinations.

The values that are actually adjustable may vary from the values specified here, depending on the hardware. The binding values can be found in the

Technical specifications chapter for the control instrument used.

Input range

Default value

–1,250 to 1,250 mV (Increment: 25)

400 mV

Electrode check on | off (Default value: off )

For the following electrodes, an electrode check can be carried out:

￭

￭

￭ pH electrodes

Metal electrodes

Ion-selective electrodes

A check is made that the electrode is properly connected and that no short-circuit is present. The electrode check is carried out when this command is started. Note that this electrode check has nothing to do with the electrode test (command ELT ).

900 Touch Control ￭￭￭￭￭￭￭￭ 321