Instruments for monitoring ambient temperature and humidity include temperature and humidity measuring meters, surface pyrometers or optical pyrometers, manipulative dry hygrometers for measuring dry and wet immersion temperatures, and electronic temperature and humidity continuous Recorders. and average area data, but shall not be installed in direct sunlight, wind, heat radiation, heating or ventilation ducts or other locations that affect the average count.
At present, there are measuring meters for measuring ambient temperature and relative humidity on the market, such as the JWSA series temperature and humidity meters produced by the National Standard Material Research Center and manufactured by Beijing Yaguang Instrument Co., Ltd., which can directly measure temperature and humidity, and compare the corresponding temperature and humidity in Table 19 . When the relative humidity crosses the point, check the dew point temperature, and the surface temperature of the object to be coated is 3°C higher than the "dew point", then it can be painted.
In the past, wet and dry bulb thermometers were commonly used to measure its temperature and relative humidity. It was composed of two identical mercury (or alcohol) thermometers, one of which was wrapped with two layers of gauze (or cotton balls), and the lower end of the gauze was immersed in a small bottle filled with water. , the thermometer reads the wet bulb temperature and the other thermometer reads the dry bulb temperature. According to the temperature difference between thousand bulbs and wet bulbs, find out the relative humidity in the air in the special table.
The temperature and humidity meter adopts the principle of resistance measurement. Although it can read directly, it needs to be placed in the environment to be tested for more than half an hour. Coatest1600 type dry humidity measuring , which is suitable for on-site inspection and survey. When in use, shake and rotate the gauge sufficiently until both thermometers have stable readings, observe the dry and wet bulb temperatures, and determine the relative humidity and dew point from the psychrometer, psychrometer graph, or slide rule
When the ambient temperature is 35°C, the surface temperature of the steel can reach 60~70°C. The surface temperature of the object to be measured is generally measured by a direct-reading thermocouple digital thermometer. The sensitive probe placed directly on the surface and wait for a few minutes for the number to stabilize. post-reading.
