Professional Digital Multimeter DM91

DM91 is a professional digital multimeter with DC/AC voltage measurement up to 600V. It has an accurate minimum measurement range of 2000μA and can be used to measure DC current. DM91 is a manually operated non-contact measurement mode with a digital count of 2000. The device can automatically detect continuity, diodes, and small battery measurements of 1.5V/9V. 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.