Mettler Toledo M400 Specifikace stáhnout pdf (Strana 35)

Transmitter Multiparameter M400 35

Printed in Switzerland 52 121 378

Process calibration at oxygen values below 5% air saturation is only available for M400 Type 3

in combination with InPro 6970 i.

The InPro 6880 i and InPro 6870 i only provide process calibration at oxygen values above 5%

air saturation.

7.4 pH Calibration

For pH sensors, the M400 transmitter features one-point, two-point (Auto or Manual mode)

or process calibration with 8 preset buffer sets or manual buffer entry. Buffer values refer to

25 °C. To calibrate the instrument with automatic buffer recognition, you need a standard pH

buffer solution that matches one of these values. (See section 8.2.3.2 for conﬁguring modes

and selecting buffer sets.) Please select the correct buffer table before using automatic

calibration (see chapter 19).

After every successful calibration, the three following options are available:

Adjust: Calibration values are taken over and used for the measurement. Additionally,

the data’s will be stored in the calibration history.

Calibrate: Calibration values will be stored in the calibration history, but will be not used for

the measurement. The calibration values from the last valid Adjustment will be further

used for the measurement.

Abort: Calibration values will be aborted.

Enter pH Calibration mode as described in section 7.1.

7.4.1 One point calibration

Select 1 point Calibration.

Place the electrode in the buffer solution and press the [ENTER] key to start the calibration.

Auto mode: The display shows the buffer that the transmitter has recognized (Point 1) and the

measured value.

Manual mode: Enter the buffer value and press [ENTER] to proceed.

As soon as the drift conditions have stabilized (or [ENTER] pressed in manual mode) the

display changes to show the slope calibration factor S and the offset calibration factor Z.

After a successful calibration, the calibration values are taken over and stored in the cal history

(Adjust), only stored in the cal history (Calibrate) or aborted.

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 87 88

Žádné komentáře

Mettler Toledo M400 Specifikace Strana 35