Any electrical or broadcast engineer, or anyone who works on electrical devices for that matter, should know what a digital multimeter, or DMM is.
These handy devices are used to measure the three basic parameters of electricity – current (amps), voltage (volts) and resistance (ohms).
Here are a few little insights into how accurate readings are obtained with a DMM…
- Voltage – Probes from the DMM are placed across the points where you’re measuring voltage.
- Current – Since you’re measuring the current within the circuit, engineers traditionally will “…break the circuit and place the digital multimeter acting as a circuit meter in circuit.” Basically, this means the current flows through the DMM to provide the reading.
- Resistance – The item must be removed from the circuit and placed under the DMM probes. The power to the device must be off and unplugged because if there is any voltage present, you will get distorted readings.
Learn more about this critical topic here…