Automatic Calibration; Measuring Range - Metria M51 Manual De Instrucciones

METRIA M51 Benchtop Conductivity/TDS Meter
Selecting the Conductivity Electrode
The METRIA M51 Conductivity/TDS meter is capable of using the 3 types of conductivity electrodes. Prior to the calibration and
measurement, you need to select the different sensors as per your sample concentration. The table below shows available electrode and its
effective measuring ranges.
CONDUCTIVITY ELECTRODE
CON-0.1
CON-1
CON-10

Automatic Calibration

Make sure that you selected the cell constant between 0.1, 1 or 10 in the setup menu. If the current option is "USER", the automatic
calibration function will be disabled (Refer to chapter SETUP MENU).
The meter allows 1 to 3 points calibration in the automatic calibration mode. To ensure higher accuracy, we recommend that you perform 3
points calibration or select a standard value close to the sample value you are measuring. The meter will automatically detect these
conductivity standard solutions and prompt the user to calibrate the meter. When the calibration is completed, all new calibration values
will automatically override existing data.
The following table shows acceptable conductivity range of standard solution for each measuring range.

MEASURING RANGE

0~20µS/cm
20~200µS/cm
200~2000µS/cm
2~20mS/cm
20~200mS/cm
Single point calibration
1.1 Make sure that you have selected 1 point calibration in the setup menu.
1.2 Rinse the conductivity electrode with distilled water, then rinse with a small amount of standard solution.
1.3 Press the key, the display shows "CAL1" and waits for recognizing the standard solution.
Cal
MEASURING RANGES
0.1~100µS/cm
10µS/cm~10mS/cm
100µS/cm~200mS/cm
CALIBRATION SOLUTION RANGE
7~17µS/cm
70~170µS/cm
700~1700µS/cm
7~17mS/cm
70~170mS/cm
CELL CONSTANT
K=0.1
K=1
K=10
DEFAULT
10µS/cm
84µS/cm
1413µS/cm
12.88mS/cm
111.8mS/cm
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