HM pH meter Model pH-80
Before you start using pH-80
Your HM ph-80's sensor must be wetted in the electrod storage solution for at least fifteen minute prior to use. This solution is inside the large Mylar packet(included). Simply pour this solution into the caps, so that the sponge is moist. Excess solution can be poured out. Insert HM pH meter model pH-80 into the cap and stand upright for fifteen minute.
The smaller Mylar packet contain a 7.0 pH buffer powder to be used for calibration. Mix the contents of the packet with a hundred millilitre of distilled water. When stored in a sealed container, the solution last approx. two to four weeks. Additional pH buffers(PH-BUF) and storage solution (OP-STOR) are available for purchase from your retailer.
Taking measurement on HM pH meter Model pH-80
1. Remove the cap. (Don't use the cap for testing)
2. Click the power button. The screen will display "PH" for a moment. Once "PH" changes to a number, your meter is ready for measurements.
3. Dip the meter's sensor into the water, liquid or solution to be tested.
4. Lightly swirl the meter to ensure the removal of air bubles or electric charges.
5. The meter will display a reading almost instantly. Keep the meter in the water until the reading stabilizes(up to thirty second, depending on the situation).
6. To view the reading out of the liquid, click the hold button. This will freeze the reading on the screen. Clicking HOLD again will release it.
7. Click the Power button to turn the meter Off.
8. Shake any excess water off the meter and rinse with low TDS water(Such as distill water, RO or DI), or use compressed air to clean it. Put the cap back on.
Please Note that : HM pH meter Model pH-80 is extremely sensitive in low conductivity water(below 10 microsiemens). If you use the meter in such water, It is better to test in flowing water, or swirl the meter continously while obtaining the reading. The reading will stabilize in ten to fifteen seconds.
Temperature and Switching Temperature modes.
1. The temperature reading is always displayed on the LCD panel(except in calibration mode), and is shown simultaneously with pH readings.
2. The default mode for temperature is Celsius. To Change the temp mode, quickly click the TEMP/CAL button to switch from celsius to Fahrenheit or Vice versa.
How to Calibrate HM pH meter Model pH-80
Proper Calibrate of you pH-80 meter is essential for accuracy and performance. Your meter was factory Calibration for pH 7.0 as a convenience for your first few uses. Calibrate your meter to a level that is close to what you will be testing, or in the center of a range. You pH-80 should be calibrated at least once per month. The pH-80 meter features auto-calibration to pH 4.0, 7.0 or 10.0
1. Turn HM pH meter Model pH-80 on and insert into a pH buffer solution of 4, 7 or 10. If your meter shows the correct reading, Stop here. If not, press and hold the CAL button for ten seconds. The display will flash and the temperature reading will change to a Flashing "CAL" image.
2. Select your desired calibration level(4, 7 or 10) by clicking the UP or DOWN buttons(indicated by the arrows). The measurement will change and a small icon will indicate the value. When the number matches the solution, click ENTER.
3. "CAL" will flash as "C--CA--CAL" indicating progress. Allow five to sixty seconds, don't press any buttons, and if possible, do not move the meter.
4. When the meter is calibrated, "End" will flash and the measurement will reappear.
Changing the Batteries.
When the meter displays a flashing battery symbol, your batteries are getting weak and should be replace soon. To change the batteries:
1. Pull out the orange batterry compartment using your thumb nail.
2. Remove the three batteries.
3. Insert new batteries in the direction as depicted inside the compartment. The flat side of the battery is the positive(+) side. The meter uses 357A batteries.
4. Close the batteries compartment. Make sure it is tightly closed.
Temperature Calibration
If you need to calibrate the PH-80's thermometer, only calibrate it in the air to a different, correct thermometer.
1. With the meter off and in the air, press and hold the power and temp buttons at the same time for five seconds.
2. 'CAL' and the temperature will flash on screen.
3. Using the Up or Down buttons(arrows),adjust to the correct temperature.
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