The importance of HYGROMETER to warehouse

Working Principle hygrometer
Hygrometer has a working principle that is by using two thermometers. The first thermometer used to measure the temperature of ordinary air and the second to measure the saturated air temperature / humidity (bottom of the thermometer covered cloth / cotton is wet). Thermometer Dry Ball: quicksilver tube allowed to dry so it will measure the actual air temperature.
Thermometer Wet Ball: quicksilver tube wetted for the measured temperature is the temperature of saturation / saturation point, namely, the temperature required for water vapor to condense.

The things that really affect the accuracy of humidity measurement using

Psychrometer is:
Sensitive nature, thorough, and how to read thermometers, Air velocity through the wet ball Thermometer The size, shape, materials and how wet the cloth The location of the ball dry or wet ball, Temperature and pure water used to wet cloth

Function hygrometer
Hygrometer used to measure the relative humidity (RH)
Process Measurement
Hygrometer there are two scales, the one show that one shows the temperature humidity. How to use it by putting in place that will measure humidity, then wait and read the scale. humidity scale is usually marked with the letter h and if the temperature in degrees Celsius.
There is a long hygrometer ie circular or a thermometer that is placed on the wall. How to read the same, can be seen on the mercury in one thermometer to measure the humidity and another that measures the temperature. yes read the circular scale.
It should be noted at the time of measurement with a hygrometer during the reading should be given the flow of air that blow toward the tool, this can be done by fanning the tool with a piece of paper or a fan. While in slink, appliance must be rotated.

Calibration
A hygrometer calibration system has been designed and manufactured in order to improve calibration ability hygrometer to generate a calibration system that can provide the best measurement capability under 2.5%. The system is built utilizing the principle of work divided flow or shared flow. Tests conducted on the system at a relative humidity range that is usually used to perform calibration, from 10% to 95%. Inequality measurement chamber tests have been conducted on the moisture range by using two sensors. The final result showed that the system was built to provide the best measurement capability of each is 0.62% at RH 10% and 0.51% at RH 60% and 95%.