The 320 Series True-rms clamp meters from Fluke Corp., Everett, WA, are suited for all-purpose use in residential, commercial, HVAC/R, and light industrial electrical applications. The series includes the 323, 324, and 325 clamp meters that all offer a slim, ergonomic design; CAT III 600 V/CAT IV 300 V safety ratings; true-rms AC voltage and current for measurement of nonlinear signals; and DC, current, frequency, and resistance measurements up to 40 kilohms for motor testing. The 324 and 325 offer a backlit display, contact temperature readings from 10°C–400°C; and capacitance measurements from 100–1000 µF. The 325 model also adds DC current measurements up to 400 A, frequency measurements from 5–500 Hz, and min./max. function.