UT261 Series Phase Sequence and Motor Rotation IndicatorsUT261 series is used for determining 3-phase power phase sequence, missing phase indication, and motor phase rotation (UT261B). UT261A and UT261B can measure AC voltage of 40~700V and 90~600V respectively. These devices can operate in frequency range of 15~400Hz. UT261 are durable devices which can withstand impact from 2 meter s height. Test leads with protective tubing are included in optional accessories.Models in UT 261 series: UT261A, UT261BFeatures of UT261 Series Phase Sequence and Motor Rotation IndicatorsCertificates: CE, UKCA, cETLus 1000A AC current measurement 1000V AC/DC voltage measurement 600A inrush current measurement (UT206A+) Temperature (UT206A+) NCV (UT206A+) ACV frequency 10Hz10kHz Jaw opening: 45mm Resistance / capacitance / frequency measurement Auto range / backlight / low battery indication Continuity / diode / duty cycle MAX/MIN Data hold / flashlight / relative mode Auto power off CAT II 1000V/CAT III 600VSpecifications of UT261 Series Phase Sequence and Motor Rotation IndicatorsSpecificationsRangeUT261AUT261BAC voltage (V)90V~600V40V~690VFrequency (Hz)15Hz~400HzWorking current (A)1mA