Operating Manual
EcoTestr™ pH1 Pocket Tester
Keypad Functions
Short press = <2 seconds
Long press = >2 seconds
1.Short press to turn on; long press to turn off.
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2. When turned off, long press to enter |
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MEAS |
setup mode. |
3.In mode setting, short press to change parameter.
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1. |
When turned on, long press to enter |
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calibration mode. |
CAL |
2. |
In calibration mode, short press to |
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confirm calibration. |
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3. |
In mode setting, short press to confirm |
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parameter selection. |
Calibration
1.For first-time use or if the tester hasn’t been used for a long time, pour some buffer/storage solution to the Fill line in the probe cap, and soak probe for about 15 to
30 minutes to hydrate the pH sensor.
2.Short press 
/MEAS to turn on. Rinse in distilled water in a clean cup and use tissue paper to gently dab off excess water.
3.Long press CAL/ to enter calibration mode; short press
/MEAS to exit.
Note: Always start calibration with pH 7.00 buffer.
4.Insert the probe in pH 7.00 calibration solution, stir gently, and leave it to stand. Wait for the measurement stability icon () to appear and stay on the display (see Fig 1); then short press CAL/ to complete the 1st calibration. Tester returns to measurement mode, and the calibration icon “M” appears on bottom left side of display.
pH
6.6pH
7
Figure 1
5.Rinse probe in distilled water. Long press CAL/ to enter calibration mode. Insert the probe in pH 4.00 calibration solution, stir gently, and let it stand. Wait for the stability
icon () to appear and stay on the display; then short press CAL/ to complete the 2nd point calibration. Tester returns to measurement mode, and calibration icons “L” and “M” will appear on bottom left side of display.
Notes:
•Tester will automatically recognize pH buffer solution. Users can choose 1, 2, or 3 calibration points. The 1st calibration must be in a calibration solution of pH 7.00, then followed by the 2nd or 3rd calibration. For details, please refer to the following table:
Calibration |
Solutions |
Indication |
Recommended |
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accuracy |
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and range |
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1-point |
pH 7.00 |
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M |
Accuracy ≥0.1 pH |
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pH 4.00 |
L |
M |
Range <7.0 pH |
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and 7.00 |
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2-point |
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pH 7.00 |
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M H |
Range >7.0 pH |
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and 10.01 |
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3-point |
pH 4.00, 7.00, |
L |
M H |
Wide measuring |
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and 10.01 |
range |
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Measurement
1.Short press 
/MEAS to turn on the tester. Rinse in distilled water in a clean cup and use tissue paper to gently dab off excess water.
2.Stir probe in sample solution, leave it to stand. Wait for the stability icon () to remain on, then take a reading.
Notes:
•If you see some white crystalline solid leaked out of the pH probe, that’s the reference solution (3M KCL) inside the probe. It is NOT a sign of any defective issue. It is a normal phenomenon when the probe is stored dry for a period of time. It proves that the junction of the probe is working well. Users can simply rinse the probe in distilled water to remove the solids and use the tester as usual.
•After each test, user should rinse the pH probe thoroughly with distilled water or purified water.
•When using premixed pH calibration buffer solutions, we recommend replacing the solution after 10 to 15 times of use to maintain accuracy.
•This tester will NOT give accurate or stable pH readings when testing distilled or deionized water. This is because
distilled or deionized water do not have enough ions present for the electrode to function properly. To measure the pH of distilled or deionized water, users need to use a specialized instrument. When testing purified water like spring water or drinking water, it will take longer for the readings to stabilize (typically 3 to 5 minutes) because there are very few ions left to be detected by the sensor.
•Do NOT store probe in purified water because that will cause permanent damage to the pH probe. Purified water is only recommended for rinsing the probe. The probe should be stored in 3M KCL pH electrode storage solution for best accuracy or stored in the pH 4.00 calibration solution as an alternative if storage solution is not handy.
•Storing the probe dry will NOT cause permanent damage to it. It will only temporarily cause the probe to lose its sensitivity, which can always be restored by soaking in the storage solution or pH 4.00 calibration solution.
Setting the Parameters
When tester is off, long press 
/MEAS to enter setup mode. Short press 
/MEAS to switch from P1 to P2 to P3. Short press CAL/ and parameter will flash, then short press
/MEAS to choose desired parameter. Short press CAL/ to confirm parameter selection. Long press 
/MEAS to return to measurement mode.
Symbol |
Menu setting |
Selection |
Factory default |
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P1 |
Select pH buffer |
USA – NIST |
USA |
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P2 |
Select temperature |
°F – °C |
°C |
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P3 |
Restore to factory |
No – Yes |
No |
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default |
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Notes:
•There are two types of possible standard pH buffer solutions (P1):
Icons |
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pH standard buffer solution series |
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USA series |
NIST series |
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L |
1.68 pH or |
1.68 pH or |
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Three- |
4.00 pH |
4.01 pH |
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point |
M |
7.00 pH |
6.86 pH |
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calibration |
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H |
10.01 pH or |
9.18 pH or |
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12.45 pH |
12.45 pH |
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1065O101_MAN_pH1_35634-05.indd 1 |
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03/22/2018 4:01:50 PM |
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