Check the listing for details. Multi-function Counter with Frequency Measurement Self-calibration Function. Condition: New. Listed at 430.00 USD. Multi-function Counter with Frequency Measurement Self-calibration Function Overview:Multi-function counter series is developed and completed by using microprocessor technology. It is a kind of precision test instrument. The biggest feature of this instrument is that it adopts inverse counting technology with high measurement accuracy, wide frequency measurement range, high sensitivity and fast measurement speed. It has the function of PPM measurement and the preset frequency F0 can be set arbitrarily. This instrument is suitable for post and telecommunication, electronic laboratory, production line and teaching, scientific research.Features :Microcontroller controlEqual precision measurementMeasurement speed 20 times / secCost-effective, high reliabilityA-channel with low-pass filter and 20-fold attenuation function10-digit LED display (8 data digits, 2 index values)Conductive rubber keypad with light-touch keypad, attractive appearanceParameter :NameTechnical specificationsFunctionFrequency measurement, weekly measurement, counting, self-calibrationFrequency measurement range1Hz～100MHz （ A channel） 100MHz～2.5GHz （B channel） Period measurement range10ns～1sCounting capacity108 － 1Sensitivity1Hz～10Hz 40mVrms10Hz～100MHz 20mVrms100MHz～3000MHz 30mVrmsInput impedance1M Ω∥ 40pF （A channel）50 Ω （ B channel)Coupling methodAC CouplingDynamic range20mVrms～250Vp-p A channel )30mVrms～1Vrms (B channel )Measurement Error± Time base accuracy ± Trigger error × Measured frequency (or period) × LSDCrystal Stability± 1 × 10^6Dimension230mm × 92mm × 230mmWeight1.8kg