Amprobe 37XR-A [2727808] True RMS Digital Multimeter. The Amprobe 37XR-A digital multimeter is a true RMS digital multimeter with a component and a logic test for troubleshooting electronic instrumentation in the lab or on the jobsite. The Amprobe 37XR-A can measure inductance to 40 Hz, frequency to 40 MHz, capacitance to 400 µF and logic to 20 MHz. The meter has a 10,000 count display with 0.1% accuracy at selected ranges. Amprobe 37XR-A digital multimeters have many great features including an input warning tone when test leads are put in the wrong jacks; continuity beeper; Min/Max, Average, Relative, Peak and Data Hold; Auto power-off and a separate door for battery and fuse access. The Amprobe 37XR-A has a CAT III 600 V, CAT II 1000 V safety rating and is UL listed.