Steelman 00660

This model of temperature and humidity switch can be set to upper and lower limit control of temperature and upper and lower limit control of humidity. The control mode, threshold and hysteresis can be set through the knob. When powering on, it enters the self-test mode, the digital tube is fully lit and flashes twice, and at the same time, the relay is closed and the RUN indicator light is on. After the self-test is completed, the measured value of the current control parameter is displayed. The default is humidity control and the humidity value is displayed.
In display mode, press the knob to the left to enter setting mode. After entering the setting mode, you can adjust the parameters by rotating the knob, and press the knob to the left to set the next parameter. After entering parameter setting mode, if there is no action for 5 seconds, exit to normal display mode and save relevant parameters. Please check the sensor wiring or replace the sensor.
Temperature resistance: The current operating temperature of RJ45 socket connector is 200℃ (except for a few high-temperature special connectors), and the temperature is -65℃. Because when the connector is working, the current generates heat at the contact point, causing a temperature rise. Therefore, it is generally believed that the operating temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact. In some specifications, the allowable temperature rise of the connector under rated operating current is clearly specified.
Resistant to moisture intrusion that will affect the insulation performance of the RJ45 socket connector and corrode metal parts. The constant humidity and heat test conditions are relative humidity 90%~95% (up to 98% according to product specifications), temperature +40±20℃, and the test time is 96 hours according to product regulations. The alternating heat and humidity test is more stringent. When the salt spray-resistant RJ45 socket connector works in an environment containing moisture and salt, the surface treatment layer of its metal structural parts and contacts may cause galvanic corrosion, affecting the physical and electrical properties of the connector. In order to evaluate the ability of electrical connectors to withstand this environment, the salt spray test is specified. It hangs the connector in a temperature-controlled test chamber and sprays sodium chloride solution with a specified concentration with compressed air to form a salt spray atmosphere. The exposure time is specified by the product specification, which is at least 48 hours.
Vibration and shock resistance Vibration and shock resistance are important properties of RJ45 socket electrical connectors. They are particularly important in extreme application environments such as aviation and aerospace, railways and road transportation. It is used to test the robustness and electrical integrity of the mechanical structure of the electrical connector. An important indicator of contact reliability. There are clear regulations in the relevant test methods. The peak acceleration, duration and shock pulse waveform, as well as the time for interruption of electrical continuity should be specified in the impact test. Other environmental performance According to the usage requirements, other environmental performance of electrical connectors include sealing (air leakage, liquid pressure), liquid immersion (resistance to specific liquids), low air pressure, etc. 1Meet the new standard GB/T 18204-2014, the detection principle of photoelectrophotometry (chemical reaction between formaldehyde gas and β-diketone, chromaticity change caused by rantidine derivatives), high accuracy.
Grevof FM801 formaldehyde detector’s main unit + colorimetric sensor box design: the sensor box can be inserted into the main unit for use, or can be used separately as a diffusion sampler (after sampling is completed, insert it into the main unit to obtain readings), which is flexible and convenient, and can be performed at the same time Multi-point detection.
The sensor box is small and secure and can be reused dozens to hundreds of times.
The diffusion filter effectively reduces the impact of environmental factors such as temperature and humidity on detection. It is the most stable formaldehyde detector (formaldehyde meter) currently on the market. Formaldehyde concentration units are optional: μg/m3 (mg/m3), ppb (ppm). Multiple detection modes are available: single-point direct measurement, sampler multi-point simultaneous measurement, and continuous monitoring. It can be connected to the Greywolf portable (fixed) multi-functional environmental quality detection system, and utilizes the functions of Greywolf software (reading, on-site annotation, storage, organization, analysis, reporting) to achieve a comprehensive indoor environmental quality detection solution .