PH meter is an Alat Ukur or a measuring tool used to measure the PH levels, or to be precise the acidity or alkalinity levels of the tested liquid. The pH meter is an electronic device that consists of a measuring probe which is actually a glass rod with a bulb at the bottom. This bulb contains the sensors that pick up the PH measurements. The probe is connected to an electronic meter which displays the measurements made by the sensor on a digital screen. Because there are different kinds of liquids to be tested, there is a need for Kalibrasi of the PH meter before each test to make it more accurate and dependable.
The calibration of pH meter requires at the minimum two liquid solutions which are also called “standard buffer solutions”. These buffers should be so chosen so as to cover the probable range of pH value span of liquid being measured or tested. The pH level span ranges from pH 4 levels to pH 10 levels with pH 7 being the zero count. The Kalibrasi meter has two control buttons for setting buffer reading points and a third one for setting or adjusting temperatures. The liquid which is being tested for its pH value should be tested against a buffer reading of zero point (pH 7) and the second buffer at either towards the pH 4 or pH 10 points as per expected or probable PH value.
Step #1 - Switch on the pH meter and let it warm up
Step #2 - Select the two pH buffer points, first being zero and the other at a point greater than the sample liquid either towards the pH 4 reading or pH 10 reading.
Step #3 - Bring sensor temperature and the buffer solution temperature to uniform levels
Step #4 - Insert the electrode probe of pH Alat Ukur into the first buffer solution and allow the reading to stabilize.
Step #5 - Set the pH meter to the pH value of the first buffer at decided temperature.
Step #6 - After recording the zero buffer reading, the probe should be wiped with distilled water and rinsed with liquid of next buffer solution and again insert the probe after stabilizing probe and solution temperatures.
Step #7 - After the calibration of PH meter at two buffer points is successfully done, the electrode’s probe may be rinsed and cleaned with sample solution and then accurate pH measurement of the sample solution can be taken.
Humidity measuring tools
Alat Ukur Kelembaban or humidity measurement tools are required to measure percentage of water present in any given substance. A moisture meter is the instrument which is used for measuring moisture or humidity of a substance. Kelembaban measuring may be required in wood or paper product industries or in the food and agriculture industry. For example, Alat Ukur Kelembaban can be used in agriculture to find out the levels of humidity in grains of wheat, rice, corn, tobacco, hay etc. Correct measurements of humidity are crucial in maintaining quality of food products.
