Selecting A Sensor; Starting A Calibration - Mettler Toledo SevenDirect SD23 Benutzerhandbuch

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 and conductivity calibrations with up to 2
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.
To ensure the most accurate readings, you should perform calibrations regularly.
Running Direct Calibration
Ensure that the appropriate buffers/standards have been selected.
1 Select an appropriate method according to [Selecting a method Page 14].
2 Select a sensor if necessary according to [Selecting a sensor Page 15].
3 Tap Calibration.
4 Tap Start calibration.
5 Enter the lot number if Methods > Calibration > Check buffer lot number is checked and confirm with OK.
The sensor name, the endpoint type and buffers/standards points are displayed.
6 Place the sensor in a calibration buffer/standard.
7 Tap Read.
The font of the measurement values turns to light blue.
8 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page 17].
appears in front of the passed calibration point.
9 Rinse the sensor with deionized water and place the sensor in the next calibration buffer/standard.
10 Tap Read.
The font of the measurement values turns to light blue.
11 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page 17].
SevenDirect™ SD23
(Manual) mode, you should enter the correct temperature value for each measurement and
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