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thermostat these 5 common problems easy to loosen!
"Original title: These 5 Common Thermostat Problems Are Easy to Solve! Smart thermostats are widely used today, but different models have varying operating methods and are applied to different types of equipment. When your commonly used thermostat problems, what should I do? Today by the thermostat manufacturer Suzhou Santai measurement and control technology and we share the thermostat often encountered many problems and solutions!
product research and development laboratory
1. after heating for a period of time, it is found that the temperature has not changed from beginning to end, and the temperature of the natural environment has been displayed.
in this kind of situation, everyone must check whether SV is very worthwhile. the preset values are all set, whether the OUT value display light of the instrument is not on, and whether the funny jokes 3 and 11 of the all-round instrument have 12VDC output. If the lamp is on and the terminals 3 and 11 also have 12VDC output, the difficult problem is on the operating part of the heater. Check whether there is a guide path during the operating period, the specification and model of the device are not appropriate (for example, 380v devices are connected in the 220v power supply circuit), and whether the route connection is not correct. In addition, it is also necessary to look at whether the sensor has the problem of short-circuit failure. when the thermocouple has short-circuit failure, temperature control the instrument will display the information indoor temperature from beginning to end!
2, the temperature drops sharply after the temperature rises
this kind of situation is generally the wrong connection of the positive and negative of the sensor. it is necessary to check the wiring of the input terminal of the instrument sensor. thermocouple: 8 is connected to positive level and 9 is connected to negative level. PT100 thermocouple: 8 is connected to solid color line and 9 is connected to negative level. PT100 thermocouple: 8 is connected to a solid color line, 9 and 10 are connected to two channels with the same color tone
3. after heating up for a period of time, the temperature displayed by the thermostat is quite apart from the specific temperature of the heater, for example, the difference is 100 degrees up and down
this kind of difficult problem, everyone should first inquire whether the temperature probe head has poor contact, whether the temperature measurement point is appropriate enough, and whether the specification and model of the temperature sensor are consistent with the key specification and model of the temperature control board. for example, the temperature control table has a k-type thermocouple, but a j-type thermocouple is specifically installed to measure the temperature.
temperature control components
4, instrument PV dialog box display information HHH or LLL identifier.
this kind of situation is the problem of the data signal accurately measured by the instrument. the accurate measured temperature du Yu -19 ℃ of the instrument is the display message LLL, and the display message
