Fluke 123B/S Service Manual - Page 21

2 Characteristics 2.3 Dual Input Meter Accuracy: @1Hz to 1 MHz @1 MHz to 10 MHz @10 MHz to 50 MHz (Fluke 123) @10 MHz to 70 MHz (Fluke 124) (50 MHz in Autorange) Full Scale Reading ±(0.5% +2 counts) ±(1.0% +2 counts) ±(2.5% +2 counts) ±(2.5% +2 counts) 10 000 counts Duty Cycle (DUTY) Range Frequency Range for Continuous Autoset Accuracy: @1Hz to 1 MHz @1 MHz to 10 MHz 2% to 98% 15Hz (1Hz) to 30 MHz ±(0.5% +2 counts) ±(1.0% +2 counts) Pulse Width (PULSE) Frequency Range for Continuous Autoset Accuracy: @1Hz to 1 MHz @1 MHz to 10 MHz @10 MHz to 40 MHz Full Scale reading Amperes (AMP) Ranges Scale Factor Accuracy Temperature (TEMP) Range Scale Factor Accuracy Decibel (dB) 0 dBV 0 dBm (600Ω /50Ω) dB on Full Scale Reading Crest Factor (CREST) Range Accuracy 15Hz (1Hz) to 30 MHz ±(0.5% +2 counts) ±(1.0% +2 counts) ±(2.5% +2 counts) 1000 counts with optional current probe same as VDC, VAC, VAC+DC, or PEAK 1 mV/A, 10 mV/A, 100 mV/A, and 1 V/A same as VDC, VAC, VAC+DC, or PEAK (add current probe uncertainty) with optional temperature probe 200 °C/div (200 °F/div) 1 mV/°C and 1 mV/°F as VDC (add temperature probe uncertainty) 1V 1 mW, referenced to 600Ω or 50Ω VDC, VAC, or VAC+DC 1000 counts 1 to 10 ±(5% +1 count) 2-7