Over the course of the year, the temperature in Managua typically varies from 71Â°F to 94Â°F and is rarely below 67Â°F or above 97Â°F. The hot season lasts for 50 days, from March 23 to May 12, with an average daily high temperature above 93Â°F. The hottest day of the year is April 25, with an average high of 94Â°F and low of 76Â°F.
A pH meter. A pH Meter is a device used for potentiometrically measuring the pH, which is either the concentration or the activity of hydrogen ions, of an aqueous solution. It usually has a glass electrode plus a calomel reference electrode, or a combination electrode.
Now that we understand the basics of calibration, why should a meter be calibrated at more than one pH value? Most pH meters should be calibrated at a minimum of two points. The most common points are values of pH 7.01 and 4.01 or 7.01 and 10.01 if you are going to be reading alkaline values.The more advanced Hanna meters will let the user calibrate at three, four or five pH values.ne more point needs to be considered. The temperature of a solution when depressed or elevated from 20 C will also contribute an error to the pH reading if the meter does not have a temperature sensor built in to correct for this variation.