Mettler Toledo M400 Dokumentacja Strona 100

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Transmitter M400 100
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
Press [ENTER] to exit from this display.
11.1.10 0
2
Optical
This menu shows the state and conditions regarding the optical O
2
sensor. By using the
key or . it is possible to navigate through this menu and get additional information.
Press [ENTER] to exit from this display.
11.2 Calibrate
(PATH: Menu / Service / Calibrate)
Enter Service Menu as described in section 11.1 ”Enter Service Menu”, select Calibrate, and
press [ENTER].
This menu has the options to calibrate the transmitter and the analog outputs and also allows
the unlocking of calibration functionality.
11.2.1 Calibrate meter (only for channel A)
The M400 transmitter is factory calibrated within specifications. It is not normally necessary
to perform meter re-calibration unless extreme conditions cause an out of spec operation
shown by Calibration Verification. Periodic verification / re-calibration may also be necessary
to meet Q.A. requirements. Meter calibration can be selected as current (used for most dissolved
oxygen, Voltage, Rg Diagnostic, Rr Diagnostic (used for pH), and temperature (used for all
measurements).
11.2.1.1 Temperature
Temperature is performed as a three point calibration. The table above shows the resistance
values of these three points.
Navigate to the Calibrate Meter screen and choose Temperature calibration for Channel A.
Press [ENTER] to begin temperature calibration process
The first text line will ask for the Point 1 temperature resistance value (this will correspond to
temperature 1 value shown on the calibration module accessory). The second text line will show
the measured resistance value. When the value stabilizes, press [ENTER] to perform calibration.
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