Fluke
124B
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- Part Number
- 124B
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Meter Readings
- Record Size (min, max, average)
- 2 M readings for 1 channel
- Maximum number of events
- 1024
- Measurement Speed
- Maximum 2 measurement/s
- Recorded Time Span
- 2 weeks
Power (125B only)
- Full scale reading
- 999 counts
- Watt
- RMS reading of multiplying corresponding samples of input A (volts) and input B (amperes)
- VA
- Vrms x Arms
- Full scale reading
- 999 counts
- Configurations
- 1 phase / 3 phase 3 conductor balanced loads (3 phase: fundamental component only, AUTOSET mode only)
- Full scale reading
- 999 counts
- VA reactive (var)
- √((VA)2-W2)
- Power factor (PF)
- Ratio between watts and VA range - 0.00 to 1.00
Crest factor (CREST)
- Full scale reading
- 90 Counts
- Range
- 1 to 10
Waveform Record
- Recorded Time Span SD card
- 11 hours at 500 μs/div 14 days at 20 ms/div
- Size Internal memory
- 400 M samples Recorded Time
- Record Size SD card
- 1.5 G samples
- Maximum number of events
- 64
- Maximum sample rate
- 400 K sample/s
- Span internal memory
- 15 minutes at 500 μs/div 11 hours at 20 ms/div
Decibel (dB)
- 0 dBV
- 1 V
- 0 dBm (600 Ω /50 Ω)
- 1 mW referenced to 600 Ω or 50 Ω
- Full scale reading
- 1000 counts
- DB on
- V dc, V ac, or Vac+dc
Advanced Meter Functions
- Fixed decimal point
- Activated by using attenuation keys
- AutoHold (on A)
- Captures and freezes a stable measurement result. Beeps when stable. AutoHold works on the main meter reading, with thresholds of 1 Vpp for AC signals and 100 mV for DC signals.
- Zero Set
- Set actual value to reference
Pulse width (PULSE)
- Full scale reading
- 1000 counts
- Frequency range
- 15 Hz (1 Hz) to 30 MHz in continuous autoset
Input A and Input B
- Full scale reading
- 5000 counts
- Common mode rejection (CMRR)
- >100 dB @ dc, >60 dB @ 50, 60, or 400 Hz
- Accuracy
- ±(0.5% +5 counts)
- Ranges
- 500 mV, 5 V, 50 V, 500 V, 750 V
Phase
- Modes
- A to B, B to A
- Resolution
- 1 degree
- Range
- 0 to 359 degrees
Continuity (Cont)
- Beep
- <(30 Ω ±5 Ω) in 50 Ω range
- Measurement current
- 0.5 mA
- Detection of shorts of
- ≥1 ms
Capacitance (CAP)
- Full scale reading
- 5000 counts
- Measurement current
- 500 nA to 0.5 mA, increases with increasing ranges
- Ranges
- 50 nF, 500 nF, 5 μF, 50 μF, 500 μF
Frequency (Hz)
- Frequency range
- 15 Hz (1 Hz) to 50 MHz in continuous autoset
- Accuracy @1 Hz to 1 MHz
- ±(0.5% +2 counts)
- Ranges
- 124B and 125B: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz, 10 MHz, and 70 MHz
- Ranges
- 123B: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz,1 MHz, 10 MHz, and 50 MHz
- Full scale reading
- 10,000 counts
Cursor Readout (124B and 125B)
- Rise or fall time
- Transition time, 0%-level and 100%-level readout (manual or auto leveling; auto leveling only possible in single channel mode)
- Single vertical line
- Min, max and time from start of readout (in RECORDER mode; instrument in HOLD)
- Single vertical line
- Average, min and max readout
- Sources
- A, B
- Single vertical line
- Harmonics values in POWER QUALITY mode.
- Single vertical line
- Average, min, max and time from start of readout (in ROLL mode; instrument in HOLD)
- Dual vertical lines
- Average, min, max and time distance readout (in ROLL mode; instrument in HOLD)
- Dual horizontal lines
- High, low and peak-peak readout
- Accuracy
- As oscilloscope accuracy
- Dual vertical lines
- Peak-peak, time distance and reciprocal time distance readout
RPM
- Accuracy
- ±(0.5% +2 counts)
- Max reading
- 50.00 kRPM
Duty cycle (PULSE)
- Range
- 2% to 98%
- Frequency range
- 15 Hz (1 Hz) to 30 MHz in continuous autoset
Temperature (TEMP) with optional temperature probe
- Accuracy
- As V dc (add temp. probe uncertainty)
- Range
- 200 °C/div (200 °F/div)
- Scale factor
- 1 mV/°C and 1 mV/°F
Vpwm
- Purpose
- To measure on pulse width modulated signals, like motor drive inverter outputs
- Principle
- Readings show the effective voltage based on the average value of samples over a whole number of periods of the fundamental frequency
- Accuracy
- As Vrms for sinewave signals
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