Fluke-125B/NA

Advanced meter functions

• 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.
• Fixed decimal point
  • Activated by using attenuation keys
• Zero Set
  • Set actual value to reference

Advanced scope functions

• Auto set (Connect-and-View™)
  • Continuous fully automatic adjustments of amplitude, time base, trigger levels, trigger gap, and hold-off. Manual override by user adjustment of amplitude, time base, or trigger level.
• Display modes Envelope
  • Records and displays the minimum and maximum of waveforms over time
• Display modes Glitch off
  • Does not capture glitches between samples
• Display modes Normal
  • Captures up to 25 ns glitches and displays analog-like persistence waveform
• Display modes Smooth
  • Suppresses noise from a waveform

Amperes (AMP)

• Accuracy
  • As V dc (add temp. probe uncertainty)
• Range
  • 200 °C/div (200 °F/div)
• Scale factor
  • 1 mV/°C and 1 mV/°F
• With current clamp Accuracy
  • Same as V dc, V ac, V ac+dc, or PEAK (add current clamp uncertainty)
• With current clamp Ranges
  • Same as V dc, V ac, V ac+dc, or PEAK
• With current clamp Scale factors
  • 0.1 mV/A, 1 mV/A, 10 mV/A, 100 mV/A, 400 mV/A, 1 V/A, 10 mV/mA

BusHealth tester (Fluke 125B only)

• AS-i
  • NEN-EN50295
• CAN
  • ISO-11898
• Foundation Fieldbus H1
  • 61158 type 1, 31.25 kBit
• Interbus S RS-422
  • EIA-422
• Modbus RS-232
  • RS-232/EIA-232
• Modbus RS-485
  • RS-485/EIA-485
• Profibus DP
  • EIA-485
• Profibus PA
  • 61158 type 1
• Type Subtype
  • Protocol

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

Continuity (Cont)

• Beep
  • <(30 Ω ±5 Ω) in 50 Ω range
• Detection of shorts of
  • ≥1 ms
• Measurement current
  • 0.5 mA

Crest factor (CREST)

• Full scale reading
  • 90 Counts
• Range
  • 1 to 10

Cursor Readout (124B and 125B)

• Accuracy
  • As oscilloscope accuracy
• Dual horizontal lines
  • High, low and peak-peak readout
• Dual vertical lines
  • Peak-peak, time distance and reciprocal time distance readout || Average, min, max and time distance readout (in ROLL mode; instrument in HOLD)
• 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
  • Average, min and max readout || Average, min, max and time from start of readout (in ROLL mode; instrument in HOLD) || Min, max and time from start of readout (in RECORDER mode; instrument in HOLD) || Harmonics values in POWER QUALITY mode.
• Sources
  • A, B

DC voltage (VDC)

• Accuracy
  • ±(0.5% +5 counts)
• Common mode rejection (CMRR)
  • >100 dB @ dc, >60 dB @ 50, 60, or 400 Hz
• Full scale reading
  • 5000 counts
• Ranges
  • 500 mV, 5 V, 50 V, 500 V, 750 V

Decibel (dB)

• 0 dBm (600 Ω /50 Ω)
  • 1 mW referenced to 600 Ω or 50 Ω
• 0 dBV
  • 1 V
• dB on
  • V dc, V ac, or Vac+dc
• Full scale reading
  • 1000 counts

Diode

• Measurement current
  • 0.5 mA
• Measurement voltage
  • @0.5 mA: >2.8 V
• Measurement voltage @open circuit
  • <4 V
• Polarity
  • + on input A, - on COM

Duty cycle (PULSE)

• Frequency range
  • 15 Hz (1 Hz) to 30 MHz in continuous autoset
• Range
  • 2% to 98%

Environmental

• Altitude
  • Operating at 3 km (10,000 feet): CAT III 600 V || Operating at 2 km (6,600 feet): CAT IV 600 V
• Altitude Storage
  • 12 km (40,000 feet)
• EMC electromagnetic compatibility International
  • IEC 61326-1: Industrial, CISPR 11:  Group 1, Class A
• EMC electromagnetic compatibility Korea (KCC)
  • Class A Equipment (Industrial Broadcasting & Communication Equipment)
• EMC electromagnetic compatibility USA (FCC)
  • 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.
• Enclosure protection
  • IP51, ref: EN/IEC60529
• Environmental
  • MIL-PRF-28800F, Class 2
• Humidity (Operating)
  • @ 0 to 10 °C (32 to 50 °F): Non-condensing || @ 10 to 30 °C (50 to 86 °F): 95% || @ 30 to 40 °C (86 to 104 °F): 75% || @ 40 to 50 °C (104 to 122 °F): 45%
• Max. input voltage input A and B
  • Direct on input or with leads: 600 Vrms CAT IV for derating || Max. floating voltage from any terminal to ground: 600 Vrms Cat IV, 750 Vrms up to 400 Hz
• Max. input voltage input A and B With Banana-to-BNC Adapter BB120
  • 600 Vrms for derating
• Safety General
  • IEC 61010-1: Pollution Degree 2
• Safety Measurement
  • IEC 61010-2-033: CAT IV 600 V/CAT III 750 V
• Storage
  • @ -20 to 60 °C (-4 to 140 °F): Non-condensing
• Temperature Battery Operation
  • 0 to 40 °C (32 to 104 °F)
• Temperature Power Adapter Operation
  • 0 to 50 °C (32 to 122 °F)
• Temperature Storage
  • -20 to 60 °C (-4 to 140 °F)
• Wireless radio with adapter Frequency range
  • 2412 MHz to 2462 MHz
• Wireless radio with adapter Output power
  • <100 mW

Frequency (Hz)

• Accuracy @1 Hz to 1 MHz
  • ±(0.5% +2 counts)
• Frequency range
  • 15 Hz (1 Hz) to 50 MHz in continuous autoset
• Full scale reading
  • 10,000 counts
• 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

Horizontal

• Ranges (normal)
  • Equivalent sampling: 123B: 20 ns to 500 ns/div, || Equivalent sampling: 124B and 125B: 10 ns to 500 ns/div || Real time sampling: 1 μs to 5 s/div || Single (real time): 1 μs to 5 s/div
• Ranges (normal) Roll (real time)
  • 1s to 60 s/div
• Sampling rate (for both channels simultaneously)
  • Equivalent sampling (repetitive signals): Up to 4 GS/s || Real time sampling 1 μs to 60 s/div: 40 MS/s
• Scope modes
  • Normal, Single, Roll

Meter readings

• Maximum number of events
  • 1024
• Measurement Speed
  • Maximum 2 measurement/s
• Recorded Time Span
  • 2 weeks
• Record Size (min, max, average)
  • 2 M readings for 1 channel

Miscellaneous

• Display Resolution
  • 640 x 480 pixels
• Display Type
  • 5.7-inch color active matrix TFT
• Interface Optically isolated
  • Transfer screen copies (bitmaps), settings and data
• Interface Optional WiFi adapter
  • Fast transfer of screen copies (bitmaps), settings and data to PC/laptop, tablet, smartphone, etc. A USB port is provided for attaching the WiFi dongle. Do not use the USB port with a cable for safety reasons.
• Interface USB to PC/laptop
  • OC4USB optically isolated USB adapter/cable, (optional), using FlukeView® software for Windows®.
• Mechanical Size
  • 259 x 132 x 55 mm (10.2 x 5.2 x 2.15 in)
• Mechanical Weight
  • 1.4 kg (3.2 lb) including battery pack
• Memory Internal memory can store 20 data sets  (screen waveform and setup)
  • Micro SD card slot with optional SD card  (max size of 32 GB)
• Power
  • Operating time: 7 hours with 50% backlight brightness || Charging time: 4 hours with test tool off,  7 hours with test tool on
• Power Allowable ambient temp
  • 0 to 40 °C (32 to 104 °F) during charging
• Power Battery power
  • Rechargeable Li-Ion 10.8 V
• Power External
  • Via Power Adapter BC430
• Power Input connector
  • 5 mm jack
• Power Input voltage
  • 10 V DC to 21 V DC
• Power Internal
  • Via Battery Pack BP290
• Power Power consumption
  • 5 W typical
• Waveform Display
  • Vertical: 10 div of 40 pixels
• Waveform Display Horizontal
  • 12 div of 40 pixels

Ohm (Ω)

• Accuracy
  • ±(0.6% + 5 counts) 50 Ω ±(2% + 20 counts)
• Full scale reading
  • 50 Ω to 5 MΩ - 5000 counts, 30 MΩ - 3000 counts
• Measurement current
  • 0.5 mA to 50 nA, decreases with increasing ranges
• Open circuit voltage
  • <4 V
• Ranges 123B and 124B
  • 500 Ω , 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ
• Ranges 125B
  • 50 Ω, 500 Ω , 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ

Peak

• Accuracy
  • Accuracy Max peak or Min peak: 5% of full scale
• Accuracy Accuracy Peak-to-Peak
  • 10% of full scale
• Full scale reading
  • 500 counts
• Modes
  • Max peak, Min peak, or pk-to-pk
• Ranges
  • 500 mV, 5 V, 50 V, 500 V, 2200 V

Phase

• Modes
  • A to B, B to A
• Range
  • 0 to 359 degrees
• Resolution
  • 1 degree

Power (125B only)

• Configurations
  • 1 phase / 3 phase 3 conductor balanced loads (3 phase: fundamental component only, AUTOSET mode only)
• Power factor (PF)
  • Ratio between watts and VA range - 0.00 to 1.00
• VA
  • Vrms x Arms || Full scale reading: 999 counts
• VA reactive (var)
  • √((VA)2-W2) || Full scale reading: 999 counts
• Watt
  • RMS reading of multiplying corresponding samples of input A (volts) and input B (amperes) || Full scale reading: 999 counts

Power Quality (125B only)

• DPF
  • 0.00 to 1.00
• Frequency range
  • 10.0 Hz to 15.0 kHz40.0 Hz to 70.0 Hz
• Number of Harmonics
  • DC to 51
• PF
  • 0.00 to 1.00, ±0.04
• Readings
  • Watt, VA, var, PF, DPF, Hz
• Readings / Cursor readings (fundamental 40 Hz to 70 Hz)
  • Vrms / Arms /Watt: Each harmonic from fundamental maybe selected for individual readings
• Watt, VA, var ranges (auto)
  • 250 W to 250 MW, 625 MW, 1.56 GW
• Watt, VA, var ranges (auto) When selected: fundamental (% f)
  • ±(4% + 4 counts)
• Watt, VA, var ranges (auto) When selected: total (% r)
  • ±(2% + 6 counts)

Pulse width (PULSE)

• Frequency range
  • 15 Hz (1 Hz) to 30 MHz in continuous autoset
• Full scale reading
  • 1000 counts

RPM

• Accuracy
  • ±(0.5% +2 counts)
• Max reading
  • 50.00 kRPM

Trigger

• Screen update
  • Free run, on trigger
• Sensitivity A and B
  • @ DC to 5 MHz: 0.5 divisions or 5 mV || @ 40 MHz: 123B: 4 divisions || @ 40 MHz: 124B and 125B: 1.5 divisions || @ 60 MHz: 123B: N/A || @ 60 MHz: 124B and 125B: 4 divisions
• Slope
  • Positive, negative
• Source
  • A, B

True-rms voltages (V ac and V ac+dc)

• Accuracy for 5% to 100% of range (AC or dc coupled)
  • 60 Hz to 20 kHz: ±(2.5% +15 counts)
• 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)
• Common mode rejection (CMRR)
  • >100 dB @ dc || >60 dB @ 50, 60, or 400 Hz
• DC rejection (only VAC)
  • >50 dB
• Full scale reading
  • 5000 counts, reading is independent of any signal crest factor.
• Ranges
  • 500 mV, 5 V, 50 V, 500 V, 750 V

Vertical

• Analog bandwidth limiter
  • 10 kHz
• Display modes
  • A, -A, B, -B
• Frequency response - ac coupled (lf roll off)
  • With STL120-IV 1:1 shielded test leads: <10 Hz (-3 dB) || With VP41 10:1 Probe: <10 Hz (-3 dB)
• Frequency response - ac coupled (lf roll off) Without probes and test leads
  • <10 Hz (-3 dB)
• Frequency response - dc coupled
  • With STL120-IV 1:1 shielded test leads: DC to 12.5 MHz (-3 dB) / dc to 20 MHz (-6 dB) || With VP41 10:1 Probe: 123B: dc to 20MHz (-3 dB)124B and 125B: dc to 40 MHz (-3 dB)
• Frequency response - dc coupled Without probes and test leads (with BB120)
  • 123B: dc to 20 MHz (-3 dB)124B and 125B: dc to 40 MHz (-3 dB)
• Input impedance
  • With STL120-IV 1:1 shielded test leads: 1 MΩ//230 pF || With VP41 10:1 Probe: 5 MΩ//15.5 pF
• Input impedance With BB120
  • 1 MΩ//24 pF
• Input impedance Without probes and test leads
  • 1 MΩ//20 pF
• Max. floating voltage, from any terminal to ground
  • 600 Vrms Cat IV, 750 Vrms up to 400Hz
• Max. input voltage A and B
  • Direct, with test leads, or with VP41 Probe: 600 Vrms Cat IV, 750 Vrms maximum voltage.
• Max. input voltage A and B With BB120
  • 600 Vrms
• Rise time, excluding probes, test leads
  • 123B <17.5 ns124B and 125B <8.75 ns
• Sensitivity
  • 5 mV to 200 V/div

Vpwm

• Accuracy
  • As Vrms for sinewave signals
• Principle
  • Readings show the effective voltage based on the average value of samples over a whole number of periods of the fundamental frequency
• Purpose
  • To measure on pulse width modulated signals, like motor drive inverter outputs

Waveform record

• Maximum number of events
  • 64
• Maximum sample rate
  • 400 K sample/s
• Recorded Time Span SD card
  • 11 hours at 500 μs/div14 days at 20 ms/div
• Record Size SD card
  • 1.5 G samples
• Size Internal memory
  • 400 M samples Recorded Time
• Span internal memory
  • 15 minutes at 500 μs/div11 hours at 20 ms/div