FAQs

Default solution folder, feel free to edit or delete it.

The Easiest Way to Tell whether a pH Meter is Accurate or Not?
The only reliable way to determine whether a pH meter is accurate or not is to test it in standard solutions. Just like the only way you can tell if a scale...
Wed, Jan 16, 2019 at 5:02 AM
How to Choose an Appropriate pH Electrode
Regular pH electrodes like 201T-F, 201T-S, or the glass bulb probes in most pocket testers are only suitable for testing general water solutions — medium to...
Wed, Dec 5, 2018 at 4:27 AM
Why is there liquid in my new pH tester cap? Is it used?
Before shipment, the factory adds in some water droplets to the tester's cap to maintain a hydrated atmosphere for the probe. This ensures that the pH ...
Wed, Apr 3, 2019 at 3:45 PM
Should I always keep my pH electrode soaked in storage solution?
The only Apera pH electrodes that must be always stored in storage solutions and can be damaged if stored dry are the ones that use Polymer electrolyte, su...
Wed, Apr 3, 2019 at 3:16 PM
How to Properly Use Standard Calibration Solutions?
The quality of your standard solutions is fundamental to the accuracy of your measurement. No matter how good the meter is, if the standard is messed up, re...
Wed, Apr 3, 2019 at 3:20 PM
How often should I calibrate my pH meter?
The frequency that you should calibrate your pH meter depends on many factors such as the type of your test samples, performance of electrodes, and the requ...
Thu, May 11, 2017 at 11:24 AM
How to deal with Er1 and Er2 when doing calibrations
Er1 will usually appear on the screen when users dip the probe into the wrong calibration solutions. For example, for pH calibration, the 1st point calibrat...
Wed, Apr 3, 2019 at 3:30 PM
Is the pH meter pre-calibrated?
All of our instruments are pre-calibrated before they are shipped. An easy determination is to look at the bottom of your LCD screen (follow manual instruc...
Wed, Apr 3, 2019 at 3:36 PM
What are the "white salts" oozing out of the probe and does it mean my meter is damaged or used?
The "white salts" are the Potassium Chloride (KCL). They can come from the storage solution in the cap or the inner reference solution in the pro...
Wed, Apr 3, 2019 at 4:09 PM
If the BPB sensor is not to be soaked in KCL, then why is there a fill line on the PC60 that surpasses the point of the BPB sensor?
The fill line on the probe cup is the minimum volume for test sample solution in the probe cap, not for the storage solution. We wouldn't recommend st...
Wed, Apr 3, 2019 at 4:16 PM