Assembling the Solenoidtester DIY Device:
The inlet air source can be either an industrial air line or an air compressor with a minimum pressure of 65 psi (approximately 4.5 atmospheres or 4.5 bar).
Next is a pressure regulator that reduces the pressure to 70 psi. You can use this one. I have a regular regulator with a pressure gauge on my compressor.
Since the high-precision pressure regulator has a fairly significant air leak (leakage is necessary for the normal operation of the regulator), a conventional valve is installed between the standard pressure regulator and the low-pressure regulator for convenience. It is necessary so that the compressor does not release pressure and does not idle between operations mode.
Next, a precision (high-precision) pressure regulator is installed. There are many expensive precision pressure regulators from well-known companies for $ 300 or more, but I can recommend buying such an IR20202 regulator that costs 1,700 rubles. I have a VEX-1330, bought for 2,000 rubles at a flea market.
High-precision pressure regulators can have both ½ and ¼ "inlets and outlets! Ask the seller and get yourself a foot or adapter for the desired diameter!
To power the device, it is VERY IMPORTANT to have a powerful stabilized power supply, since a deviation from 12 volts by only 0.5 volts under load gives a floating result.
I use a $ 10 PSU like this.
ALWAYS REGULATE AND TEST THE POWER SUPPLY!
YOU MUST HAVE STRICTLY 12 VOLTS ON THE POWER SUPPLY!
The permissible discrepancy in the power supply under load and without plus or minus 0.5 volts (that is, from 11.5 to 12.5 volts. To accurately adjust the voltage, there is an adjusting resistor on the power supply unit. Try to adjust it to 12.0 volts as accurately as possible!
After adjusting 12.0, it is necessary to connect a solenoid with a resistance of 4-6 ohms or a resistor and check the deviation of the reference voltage of 12.0 V. If the deviation is greater than 1 volt, it is necessary to change the power supply.
If you have a high-quality ATX computer power supply on hand, you can make a good power supply for the Solenoid Tester DIY out of it, but you will need to test it under load as described above.
To turn on the power supply, you need to find and close the connector on the connector.
General assembly text