Datasheet

6 Fluke Corporation Fluke 120B Series Industrial ScopeMeter
®
Hand-Held Oscilloscopes
Dual input meter
The accuracy of all measurements is within ± (% of reading + number of counts) from 18 °C to 28 °C.
Add 0.1x (specific accuracy) for each °C below 18 °C or above 28 °C. For voltage measurements with 10:1 probe, add probe
uncertainty +1 %. More than one waveform period must be visible on the screen.
Input A and input B
DC voltage (VDC)
Ranges 500 mV, 5 V, 50 V, 500 V, 750 V
Accuracy ± (0.5 % +5 counts)
Common mode rejection (CMRR) >100 dB @ dc, >60 dB @ 50, 60, or 400 Hz
Full scale reading 5000 counts
True-rms voltages (V ac and V ac+dc)
Ranges 500 mV, 5 V, 50 V, 500 V, 750 V
Accuracy for 5 % to 100 % of
range (DC coupled)
DC to 60 Hz (V ac+dc) ± (1 % +10 counts)
1 Hz to 60 Hz (V ac) ± (1 % +10 counts)
Accuracy for 5 % to 100 % of
range (AC or dc coupled)
60 Hz to 20 kHz ± (2.5 % +15 counts)
DC rejection (only VAC) >50 dB
Common mode rejection (CMRR) >100 dB @ dc
>60 dB @ 50, 60, or 400 Hz
Full scale reading 5000 counts, reading is independent of any signal crest factor.
Peak
Modes Max peak, Min peak, or pk-to-pk
Ranges 500 mV, 5 V, 50 V, 500 V, 2200 V
Accuracy Accuracy Max peak or Min peak 5 % of full scale
Accuracy Peak-to-Peak 10 % of full scale
Full scale reading 500 counts
Frequency (Hz)
Ranges 123B: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz,1 MHz, 10 MHz, and 50 MHz
124B and 125B: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz, 10 MHz, and 70 MHz
Frequency range 15 Hz (1 Hz) to 50 MHz in continuous autoset
Accuracy @1 Hz to 1 MHz ± (0.5 % +2 counts)
Full scale reading 10 000 counts
RPM
Max reading 50.00 kRPM
Accuracy ± (0.5 % +2 counts)
Duty cycle (PULSE)
Range 2 % to 98 %
Frequency range 15 Hz (1 Hz) to 30 MHz in continuous autoset
Pulse width (PULSE)
Frequency range 15 Hz (1 Hz) to 30 MHz in continuous autoset
Full scale reading 1000 counts
Amperes (AMP)
With current clamp Ranges same as V dc, V ac, V ac+dc, or PEAK
Scale factors 0.1 mV/A, 1 mV/A, 10 mV/A, 100 mV/A, 400 mV/A,
1 V/A, 10 mV/mA
Accuracy same as V dc, V ac, V ac+dc, or PEAK
(add current clamp uncertainty)