Apera Instruments YD300 Instruction manual
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.
6) Rinse the electrode in distilled/deionized water and shake off excess water; insert it into B3 calibration solution;
stir the electrode for a few seconds and let it stand still. Wait for the reading to fully stabilize (about 2 minutes).
7) Press button to confirm the 2nd point calibration, “2.00 and mmol/L” icon starts flashing (see picture
(4-4)); calibration will be finished after approximately 20 seconds. During the icon flashing, do NOT press any
key. The meter then returns to measurement mode.
8) To verify the calibration quality: Rinse the electrode in distilled/deionized water and shake off excess water; then
put it into the B2 solution, stir for a few seconds and let it stand still;
Take the reading after appears and stays; The reading should be close to 2.00 ±0.25×10-1 mmol/L.
Otherwise, please repeat the calibration process.
3. Sample Test
Pour your sample solution into the #1 or #2 sample vial (bottle). Rinse electrode with distilled/deionized water and shake
off excess water; insert the probe into sample solution, stir gently and let it stand still; when icon appears and stays,
take the reading. Press to save the measurement data. Press to switch to other units.
4. Parameters Setting
When the meter is powered on and in measurement mode, long press (>2 seconds) to enter parameter setting
mode. Short press to change the parameter; Press to confirm the change and return to measurement
mode.
Prompt
Parameter setting items
Parameter
P1
Calibration Method Setting
--------
P2
Resolution Setting
0.01-0.1
P3
Temperature Unit Setting
℃-℉
P4
Activity Compensation Setting
OFF-On
P5
Backlight Automatically Off Setting
OFF-On
P6
Automatic Power Off
OFF-On
P7
Default Setting
OFF-On
YD300 Portable Water Hardness Meter
Quick Start Manual
Scan to watch the video tutorial
1. Electrode Activation
c) 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.
d) 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)
9) 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.
10) 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).
11) 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.
12) 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.
13) Then and icons will appear and start flashing, indicating the meter enters 2nd point calibration
mode; the calibration solution is B3.
14) Rinse the electrode in distilled/deionized water and shake off excess water; insert it into B3 calibration solution;
stir the electrode for a few seconds and let it stand still. Wait for the reading to fully stabilize (about 2 minutes).
15) Press button to confirm the 2nd point calibration, “2.00 and mmol/L” icon starts flashing (see picture
(4-4)); calibration will be finished after approximately 20 seconds. During the icon flashing, do NOT press any
key. The meter then returns to measurement mode.
16) To verify the calibration quality: Rinse the electrode in distilled/deionized water and shake off excess water; then
put it into the B2 solution, stir for a few seconds and let it stand still;
Take the reading after appears and stays; The reading should be close to 2.00 ±0.25×10-1 mmol/L.
Otherwise, please repeat the calibration process.
3. Sample Test
Pour your sample solution into the #1 or #2 sample vial (bottle). Rinse electrode with distilled/deionized water and shake
off excess water; insert the probe into sample solution, stir gently and let it stand still; when icon appears and stays,
take the reading. Press to save the measurement data. Press to switch to other units.
4. Parameters Setting
When the meter is powered on and in measurement mode, long press (>2 seconds) to enter parameter setting
mode. Short press to change the parameter; Press to confirm the change and return to measurement
mode.
Prompt
Parameter setting items
Parameter
P1
Calibration Method Setting
--------
P2
Resolution Setting
0.01-0.1
P3
Temperature Unit Setting
℃-℉
P4
Activity Compensation Setting
OFF-On
P5
Backlight Automatically Off Setting
OFF-On
P6
Automatic Power Off
OFF-On
P7
Default Setting
OFF-On
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