Connecting Sensors; Starting Analysis Selecting A Method; Selecting A Sensor; Starting A Calibration - Mettler Toledo SevenDirect SD20 Benutzerhandbuch

4.6 Connecting sensors

When connecting a sensor, make sure that the plugs are properly inserted. If you are using a sensor with a
built-in temperature probe or a separate temperature probe, connect the second cable to the ATC socket.
Example
Connect a pH sensor to the BNC plug and if a temperature sensor, ISM or both are integrated, connect the
RCA (Cinch) plug to the ATC input.
®
ISM sensor
When connecting an ISM
of the sensor chip is registered and appears on the display.
The calibration history, the initial data and the maximum temperature can be reviewed in the data memory.
Note We strongly recommend you to switch off the meter when disconnecting an ISM sensor. In doing so, you
make sure that the sensor is not removed while the instrument is reading data from or writing data to the ISM-
chip of the sensor.
5 Starting Analysis
5.1 Selecting a method
Before starting the analysis, you must first select a method. You can select a predefined or user-defined method
directly from the method lists.
To select a method, proceed as follows:
1 Use the top handle to access into Methods menu.
2 Select a measurement mode from the side tab on the left.
3 Tap the method you want to start.
The measurement mode and method name is shown on Home screen.

5.2 Selecting a sensor

If the parameter in Methods > Configuration > Sensor is defined as 'Any' and no ISM sensor is connected,
you can change a sensor on Home screen before starting an analysis.
To select a sensor, proceed as follows:
1 Tap the sensor name on Home screen.
- or -
Tap Calibration > Change sensor.
- or -
Tap Verification > Change sensor.
The names of all available sensors are listed.
2 Tap the sensor you want to select.
The last calibration date of the sensor and the required buffers/standards are displayed.
3 Tap Close to go back to Home screen.
- or -
Tap Start calibration to start the calibration.
- or -
Tap Start verification to start the verification.

5.3 Starting a calibration

The meter allows you to perform pH calibrations with up to 5 points. The successful calibration data will be
stored into the active sensor data.
Note
The use of a temperature sensor or electrode with a built-in temperature sensor is recommended.
If you use
keep all buffers/standards and sample solutions at the set temperature.
14
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sensor to the meter, the ISM icon
(Manual) mode, you should enter the correct temperature value for each measurement and
appears on the display and the sensor name
SevenDirect™ SD20