23
I
A130/131
Water Hardness Calibration
The A series meter allows 2 to 5 points water hardness calibration,
acceptable calibration points include the 0.01,
0.1, 1, 10, 100, 1000
mmol/L.
1. Ensure that the meter is in the Ion (Direct Reading) > Water
Hardness mode.
2. Press the
Cal
key, the screen shows "Calibration Point 0.01
mmol/L".
3. Press the
/
key to select first calibration point (e.g., 10
mmol/L), the meter will automatically perform the calibration
from the low to high concentrations.
4. Rinse the water hardness electrode with distilled water, then
rinse with a small amount of standard solution. Place the
electrode (and temperature probe) into the standard solution, stir
gently to create a homogeneous solution.
5. Press the
Enter
key, the status bar shows "
Calibrating…
"
6. When the mV reading has stabilized, the screen will show
"Calibration Point 100 mmol/L", the meter prompts you to continue
with second point calibration.
7. Repeat the steps 4 and 5 above until the meter returns to the
measurement mode. Calibration is completed.
Viewing the Calibration Log
1. Press the
MR
key, the screen shows a Data Log Menu.
2. Press the
Enter
key to view the calibration report.
3. Press the
ESC
key to return to the measurement mode.
If the meter is not calibrated, the calibration report will be unavailable.
