Mettler Toledo M400 Especificações Página 58

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Transmitter M400 58
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
7.6.4 mV calibration (only for analog sensors)
Enter mV calibration mode as described in section 7.1 “Enter Calibration Mode”.
The user can now enter Point 1. The offset calibration factor is calculated by using the value of
Point1 instead of the measured value (line 4, mV = ....) and displayed on the next screen.
Z is the newly calculated offset calibration factor. The slope calibration factor S is always 1 and
does not enter the calculation.
After a successful calibration, the calibration values are taken over (Adjust) or discarded (Cali-
brate) or (Abort).
If ”Adjust” is chosen, the message ”Calibration successful” is displayed. In any case you will get
the message ”Re-install sensor” and ”Press ENTER” on the display. After pressing ”ENTER” the
M400 returns to the measuring mode.
7.6.5 ORP calibration (only for ISM sensors)
In case that an pH sensor with solution ground based on ISM technology is connected to the
M400, the transmitter gives the option to make in addition to the pH calibration an ORP calibra-
tion.
h
NOTE: In case of choosing ORP calibration the parameters defined for pH (see chapter 8.2.3.2
“pH/ORP parameters”, PATH: Menu/Configure/Measurement/pH) will not be considered.
Enter ORP calibration mode as described in section 7.1 “Enter Calibration Mode”.
The user can now enter Point 1. In addition the actual ORP is displayed.
Press [ENTER] to proceed.
The display shows 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.
If ”Adjust” or ”Calibrate” are chosen, the message ”Calibration successful” is displayed. In any
case you will get the message ”Re-install sensor” and ”Press ENTER” on the display. After press-
ing ”ENTER” the M400 returns to the measuring mode.
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