YD300 Portable Water Hardness Meter
Quick Start Manual
Scan to watch the video tutorial
1. Electrode Activation
a)
For first-time use — shake electrode with force to let the inner solution of electrode fall into the measuring head
compartment; there should NOT be any bubbles within the measuring head. Pour a small amount of soaking
solution into the soaking solution vial, and soak the electrode for 30 minutes.
b)
Regular Usage — The activation time only takes 10 to 15 minutes for a frequently used electrode. As long as the
reading is stable, users can start to perform calibration and measurements (please note that the readings without
electrode being immersed in solutions are random).
2. Calibration (take B2, B3 calibration and mmol/L as an example)
1)
Power on the meter. Press , and icons appear and are flashing at the same time,
indicating the meter enters 1st point calibration; the calibration solution is B2.
2)
Rinse the electrode in distilled/deionized water and shake off excess water; insert the electrode into B2
calibration solution and gently stir the electrode for a few seconds and let it stand still; Wait for the reading to
fully stabilize (about 2 minutes).
3)
Then press to confirm calibration, “
2.00×10-1mmol/L
” icon starts flashing (see picture (4-3),
indicating 1st point calibration will be finished after approximately 20 seconds. During the icon flashing, do
NOT press any key.
4)
NOTE:
The reading may be temporarily stable in about 30 seconds, but we recommend waiting about 2 minutes
for the reading to get fully stabilized before pressing to confirm calibration. This practice will
significantly improve the accuracy of calibration.
5)
Then and icons will appear and start flashing, indicating the meter enters 2nd point calibration
mode; the calibration solution is B3.
