Some older flashes can use trigger voltages as high as 600 volts.
Many newer digital cameras can use only flashes with a low trigger voltage, also known as a firing voltage. Camera flashes work by applying a trigger voltage to a tube full of gas, causing the main capacitor to discharge suddenly. This makes the gas light up, and allows you to take a well-lit picture. High voltages, such as those found in older flash units, can damage your camera severely. You can check the voltage on your flash using a multimeter.
Instructions
1. Look for information about your flash unit. If you still have the manual, check the flash specifications. If you no longer have the manual, email or telephone the manufacturer's customer support department to ask about your particular model.
2. Charge the flash. Put fresh batteries in the flash for which you wish to check the voltage. Charge the flash until the ready lamp lights up.
3. Prepare the meter. Set the digital multimeter's range selector to its most sensitive range.
4. Meter the flash. Hold the black, or negative, probe to your flash's edge contact, and the red, or positive, probe to the center pin. The flash voltage should appear on the multimeter's digital display.
Tags: about your, Charge flash, check voltage, have manual, trigger voltage, your flash
