Smart Digital Multimeter DM90S

DM90S is a smart digital multimeter designed for measuring DC/AC voltage. It has a 500mV DC voltage precision measurement mode and 6000 digital counts. DM90S is powerful and can measure voltage, resistance, capacitance, continuity, diode and frequency. At the same time, the device has data retention, screen backlight display and top flashlight design. It is very suitable for novice electricians and experienced electricians to teach. Frequently Asked Questions Why does my multimeter show “OL” or “1”? When your multimeter displays “OL” (Over Limit) or “1”, it usually means the measurement exceeds the selected range or the circuit is open. For example, if you’re measuring resistance and the probes aren’t touching anything (or measuring an open circuit), your multimeter will show “OL” or “1” to indicate that the value is out of range. Switching to a higher range or reconnecting the probes usually resolves the issue. Yes, many digital multimeters come with a built-in temperature measurement function. These models typically include a K-type thermocouple probe that allows you to measure temperatures in Celsius or Fahrenheit. Check your multimeter’s specifications to see if it supports this feature. It’s especially useful for HVAC technicians or electronics troubleshooting.