
Transmitter M300 81
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
11.3 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.
11.3.1 CalibrateMeter(notonISMversion)
The M300 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 Resistance (1–5, used for con-
ductivity), Current (used for most dissolved oxygen and dissolved ozone), Voltage,
Rg Diagnostic, Rr Diagnostic (used for pH and 58037221 dissolved oxygen), and Temperature
(used for all measurements).
11.3.1.1 Resistance
The meter is equipped with five (5) internal ranges of measurement on each channel. Each re-
sistance range and temperature is calibrated separately, with each resistance range consisting
of a two-point calibration.
Below is a table showing the resistance values for all calibration ranges.
Range: Point1 Point2 Point3
Resistivity 1 1.0 Mohms 10.0 Mohms –
Resistivity 2 100.0 Kohms 1.0 Mohms –
Resistivity 3 10.0 Kohms 100.0 Kohms –
Resistivity 4 1.0 Kohms 10.0 Kohms –
Resistivity 5 100 Ohms 1.0 Kohms –
Temperature 1000 Ohms 3.0 Kohms 66 Kohms
It is recommended that both calibration and verification be performed using the M300 Calibrator
Module Accessory (refer to accessory list, in section 15). Instructions on the use of this acces-
sory are provided with the calibrator module.
Comentários a estes Manuais