Cautions for the Use of Water Hardness Meters

In addition to the special precautions when usingvarious hardness testers, there are some common issues that should be noted. The following are listed:  The hardness tester itself will produce two kinds of errors:

One is the error caused by the deformation and movement of its parts; the other is the error caused by the hardness parameter exceeding the specified standard.

For the second error, the hardness tester is calibrated with a standard block before measurement. For the Rockwell hardness test results, the difference is within ±1. A stable value with a difference of ±2 can give a correction value. When the difference is outside the range of ±2, the hardness tester must be repaired or replaced by other hardness test methods.

YD300 Portable Water Hardness Meter have a de facto scope of application and should be selected correctly according to the regulations. For example, when the hardness is higher than HRB100, the HRC scale should be used for testing; when the hardness is lower than HRC20, the HRB scale should be used for testing. Because it exceeds the specified test range, the accuracy and sensitivity of the hardness tester is poor, and the hardness value is not accurate and should not be used. Other hardness testing methods also stipulate corresponding calibration standards. The standard block used to calibrate the hardness tester cannot be used on both sides because the standard surface and the back surface hardness are not necessarily the same. The standard block is generally valid for one year from the date of calibration.