There are two main types of pressure switches, one is normally open and the other is normally closed. There are four main characteristics of the pressure switch. The first is that the pipe thread joint type and installation structure and the installation structure of the welded copper pipe are very flexible, and it is also extremely convenient in use. No additional installation is required to fix the structure; second One feature is that the pressure switch has a plug-in connection and a wire-type connection for customers to choose; the third feature is that the pressure switch has a safe and reliable sealed stainless steel sensor that customers can use with confidence; The last one is that, within a certain pressure range, the customer can arbitrarily choose a pressure value for the pressure switch to operate.
How to adjust pressure by pressure switch
The pressure switch has relatively high accuracy and stable performance, and is widely used in the petrochemical industry, metallurgy industry, power industry and water supply industry to measure, control and control the surface pressure and absolute pressure of different liquids and other surfaces. An intelligent detection and control instrument.
The working principle of the pressure switch is that if the pressure in the pressure switch system is higher than or lower than the initially set safe pressure value, the disc in the sensor in the pressure switch can be sensed in time and an alarm will occur. The movement occurs, and the guide rod is connected to each other, so that the pressure switch connector is turned on or disconnected from the power supply.
When the pressure in the pressure switch system returns to the initial set safety pressure value, the disc can be sensed in time, and then return to the original position in an instant, the switch will automatically return to the original position and state. It should be noted that we must understand the adjustment method of the pressure switch. Let us take a closer look:
1. Select the pressure controller (JC-210, HNS-210) with the set value range of 0.1～1.0Mpa
2. Turn the pressure adjustment screw on the top right to make the pointer indicate at 0.8Mpa (8kg or 8bar) of the scale. This value is the upper limit switching value.
3. Turn the pressure adjustment screw on the top left to make the pointer indicate 0.3Mpa on the scale, the lower limit switch value =? Upper limit switching value-switch pressure difference = 0.8-0.3 = 0.5, this value is the lower limit switching value.
Method for adjusting gas circuit pressure switch of numerical control machine
Various pressure switch setting methods
1. There is a small knob on the outlet side of the IS1000 mechanical pressure switch. Use a small flat-blade screwdriver to change the pressure value of the switch action by adjusting this knob. There is a red indicator on the side of the pressure switch, which can indicate the current pressure setting.
2. GP46 pressure gauge has a pressure switch to set the operating pressure. It is necessary to turn counterclockwise to remove the transparent protective cover of the pressure gauge. There is a small knob under the pressure dial. Use a small flat-blade screwdriver to adjust this knob to adjust the pressure switch Action pressure. There is a green pointer on the pressure gauge, this pointer indicates the set operating pressure. Note that after adjusting the operating pressure, install the protective cover of the pressure gauge.
Description: Because IS1000 and GP46 are mechanical pressure switches, their operating pressure indicators will have an indication error of less than 0.05MPa, and there will also be a hysteresis of 0.08MPa.
3, ISE30 digital pressure gauge pressure switch has three buttons and a display window, the three buttons are "△", "SET", "▽", through these three buttons can achieve the setting of the pressure switch.
Press “SET” for more than three seconds to enter the main program setting. The first interface is to select the pressure unit, generally set to “bar”. If you need to change the unit, use “△” or “▽” to change. After setting to the desired unit, press "SET" to enter the next level of display color setting. The display color is generally set to "SOG" (green when ON). If you want to change the display color, you can also change it by △" or "▽". After the display color setting is completed, press "SET" to enter the action mode setting, generally set to "HYS" (hysteresis mode), continue to press "SET" to enter the output state setting, generally set to "NO" (normally open state). Continue to press "SET" to enter the response time setting, here set the air pressure to reach the set pressure and output Delay between action signals, the unit is milliseconds. Continue to press "SET" to enter the automatic preset setting, generally set to "MAN" (manual mode, can not be set to "AUT"). Then continue to press "SET" to exit the main Program settings.
Press "SET", there will be "P_1" and a number alternately flashing, this number is the operating pressure of the pressure switch, press "△" or "▽" to enter the setting interface of the operating pressure P value, the display area displays the pressure value , And the last digit flashes, at this time, you can change the last position by "△" or "▽", you can switch between different digits by "SET", and then change the current flashing digit by "△" or "▽" The value of the bit. After setting, long press "SET" to exit P_1 setting, enter "H_1" and a number alternately flashing interface, the flashing number is the H value, that is, the hysteresis value. Use "△" or "▽" to enter the setting of the hysteresis value. The method of digital modification is the same as the method of P value modification. After the modification is completed, long press "SET" to exit the setting, the current air pressure is displayed on the digital display.
Pay special attention to that when adjusting P_1 or H_1, the highest digit, that is, the digit on the left side that is not a digital display, must be adjusted to a short vertical line, otherwise all settings will be automatically reset to zero.
4. PPX type digital display pressure gauge pressure switch has "MODE", "△", "▽", three buttons and two digital display windows, one large and one small. And PPX has two signal output channels, generally we use the first channel.
Keep pressing "MODE" for more than three seconds to enter the main program setting. The first interface is the 1-channel action mode setting. At this time, the small window displays "OUT1", and the general setting large window displays "HYS" (hysteresis mode). If you need to change the settings, use "△" or "▽" to change. Continue to press "MODE" to enter the 2-channel action mode setting. At this time, the small window displays "OUT2", and generally the large window displays "OFF" (closes 2 channels). Continue to press "MODE" to enter the output state setting, generally set to "NO" (normally open). Continue to press "MODE" to enter the response speed setting, then the small window displays "SPEED", the unit is milliseconds. Continue to press "MODE" to enter the display color setting. At this time, the small window displays "CLOR", and generally the large window displays "G-ON" (green when ON). Continue to press "MODE" to enter air pressure unit selection, the general setting window is displayed as "bAr" (bar). Then continue to press "MODE" to exit the main program settings. The current pressure is displayed in the large digital display window. Note: In special cases, there may be no last unit setting.
Press the “MODE” small window to display “LO-1” and then display a value. This value is the lower limit pressure of the pressure switch action in the hysteresis mode. This value can be changed by “△” and “▽”. Pressing the "MODE" small window again will display "HI-1" and then display a value. This value is the upper limit pressure of the pressure switch in hysteresis mode. This value can be changed by "△" and "▽".