How to Measure Voltage on A Solenoid Valve With Multimeter

Solenoid valve is one of the common key components in construction machinery, which is used to control hydraulic and pneumatic systems and so on. Measuring the voltage of the solenoid valve is an important task in the maintenance and troubleshooting process. In this article, we will introduce how to use a multimeter to accurately measure the voltage of the solenoid valve to ensure its normal operation.

 

Preparing Tools and Safety Measures

Before measuring the voltage of the solenoid valve, make sure you have the following tools ready and take the necessary safety measures:

1.a digital or analog multimeter.

2.Insulated gloves and goggles for safety.

Disconnecting the power supply: Before taking measurements, disconnect the power supply to which the diesel engine parts, including the solenoid valve, are connected to avoid the risk of electric shock.

 

Identifying the Solenoid Valve's Power Connection Points

Look for markings or symbols: First, check the diesel solenoid valve itself for markings or symbols, usually symbols or words identifying the power connection points. These may be + and - symbols, the letters P (positive) and N (negative), or other symbols.

 

Look for wire color: Solenoid power cords are usually a specific color. Typically, a red wire usually indicates a positive or power wire, while a black or blue wire usually indicates a negative or ground wire. However, color standards may vary, so it's best to check the electrical diagram or manual of your construction machine to confirm the wire color.

 

Check the connection: Check the connection of the solenoid valve. Typically, solenoids have two wire connection terminals. The positive power wire is usually connected to the energized side, while the negative ground wire is usually connected to ground or zero potential.

 

Setting Up the Multimeter

Select the appropriate measurement range: First, determine the voltage, current, or resistance range you want to measure. Different measurements require different range settings. If you are unsure of the voltage range, always start at the highest range and adjust again for a more accurate reading.

 

Insert Test Probe: Insert the multimeter's test probe. Typically, the red probe is used for positive (e.g., the positive end of a voltage measurement), while the black or green probe is used for negative or shared ground.

 

Select Measurement Mode: Rotate the multimeter to the correct measurement mode for your measurement needs. Multimeters typically have the following common measurement modes:

 

Voltage (V): Used to measure voltage.

Current (A): Used to measure current. Note that when measuring current, the circuit must be disconnected and then the multimeter must be placed in the circuit to measure the current.

Resistance (Ω): Used to measure resistance.

AC Voltage (V~): Used to measure AC voltage.

AC Current (A~): For measuring AC current.

Adjust the measurement range: Select the correct measurement range according to your measurement needs. If you are unsure of the amplitude of the voltage or current, select the highest range and gradually lower the range to get a more accurate reading.

 

Connecting the Test Probe: Connect the test probe to the appropriate location on the circuit or power supply to be measured. Make sure the red probe is connected to positive and the black or green probe is connected to negative or ground.

 

Turning off the power and cleaning up

When the measurement is complete, turn off the power to the solenoid valve and disconnect the test probe from the solenoid valve, making sure that no other parts, such as the starter motor, are affected, then turn off the multimeter and clean up the work area, making sure that there is no debris or hazardous materials.

 

By testing a solenoid with a multimeter, you can easily measure the voltage of a solenoid valve, which is important for maintaining and troubleshooting solenoids in construction machinery. Ensure that you follow safety guidelines when making any electrical measurements and take appropriate measures to protect yourself and your equipment as needed. If the measurements are not normal, further repairs may be required or the condition of the solenoid valve may need to be checked.