Mettler Toledo M400 Especificações descarregar pdf (Página 32)

Transmitter Multiparameter M400 32

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7 Sensor Calibration

(PATH: Cal)

The calibration key  allows the user one-touch access to Sensor calibration and veriﬁcation

features.

NOTE: During Calibration on Channel A, a ﬂashing ”H” (Hold) in the upper left corner of the

display indicates a calibration is in process with a Hold condition active. (The hold output

function needs to be activated.) See also chapter 3.3.

7.1 Enter Calibration Mode

While in Measurement mode press the  key.

Press the  or  key to select the type of calibration desired.

After selecting ”Sensor”, use the  key to move to the next line. Select the channel ”A” or ”B” to

be calibrated. Select the desired Sensor Calibration task. The choices for each sensor type are:

Conductivity = Conductivity, Resistivity, Temperature*, Edit*, Verify

Oxygen = Oxygen, Temperature*, Edit*, Verify

pH = pH, mV, Temperature*, Edit pH*, Edit mV, Verify

Press [ENTER].

* only on channel ”A”

After every successful calibration, the three options are available:

Adjust: Calibration values will be overtaken und used for the measurement. Additionally,

the data will be stored in the calibration history*.

Calibrate: Calibration values will be stored in the calibration history* for documentation,

but will not be used for the measurement. The calibration values from the last valid

Adjustment will be further used for the measurement.

Abort: Calibration values will be discarded.

* only available with ISM sensors

7.2 Conductivity Calibration

This feature provides the ability to perform a one-point or two-point Conductivity ”Sensor”

calibration. The procedure described below works for both types of calibrations. There

is no reason to perform a two-point calibration on a two-electrode conductivity sensor. Four

electrode sensors do require a two-point calibration.

NOTE: When performing calibration on a conductivity sensor, results will vary depending on the

methods, calibration apparatus and / or quality of reference standards used to perform the

calibration.

Enter Conductivity Sensor Calibration mode as described in section 7.1.

Choose ”standard” or ”linear” compensation mode.

Press [ENTER].

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Mettler Toledo M400 Especificações Página 32