Mettler Toledo M400 Especificações descarregar pdf (Página 59)

Transmitter M400 59

Printed in Switzerland 52 121 378

7.7 ISFET calibration

NOTE: When measuring with an ISFET sensor, the nominal zero point must be adjusted each

time a new sensor is connected (to adjust the operating point). The adjustment for that sensor

remains stored in the transmitter. Immerse sensor in a zero point buffer (6.5 ... 7.5). Make a

mV calibration and enter for point 1 the value 00.00 mV. (see chapter 7.7.4 “mV calibration”).

Afterwards a two-point calibration (see chapter 7.7.2 “Two-point calibration”) of the ISFET sen-

sor is recommended to achieve best measuring results.

7.7.1 One-point calibration

Enter ISFET calibration mode as described in section 7.1 “Enter Calibration Mode”.

Select 1 point Calibration. With ISFET sensors a one point calibration is always performed as a

offset calibraton.

The following calibration steps are the same as described for pH sensors (see chapter 7.6.1

“One point calibration”).

7.7.2 Two-point calibration

Enter ISFET calibration mode as described in section 7.1 “Enter Calibration Mode”.

Select 2 point Calibration.

The following calibration steps are the same as described for pH sensors (see chapter 7.6.2

“Two-point calibration”).

7.7.3 Process calibration

Enter ISFET calibration mode as described in section 7.1 “Enter Calibration Mode”.

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 130 131

Sem comentários

Mettler Toledo M400 Especificações Página 59