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AEMC 3945-B 3945 B 2130.78 193-36 Three Phase Power Quality Analyzer
Product Information

3945-B Datasheet 3945-B Datasheet
  3945-B Users Manual 3945-B Users Manual
  PowerPad Function Overview PowerPad Function Overview
  Recording, Alarms and Transient Modes Recording, Alarms and Transient Modes
  PowerPad Exporting Data PowerPad Exporting Data
  Power Quality Measurements Power Quality Measurements

  DataView Software Tutorials
Dataview Setup - Part 1 DataView Setup - Part 1
  Control Panel - Part 2 Control Panel - Part 2
  Trend Recordings- Part 3 Trend Recordings - Part 3
  Photographs - Part 4 Photographs - Part 4
  Alarms - Part 5 Alarms - Part 5
  Transients - Part 5 Transients - Part 5
  Inrush - Part 5 Inrush - Part 5

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Accessories Set of 3 color coded MN93 probes (240A) + 10 ft leads [+$449.00]
Set of 3 color coded SR193 probes (1200A) + 10 ft leads [+$669.00]
Set of 3 color coded 24" AmpFlex 193-24 probes (6500A) + 10ft leads [+$659.00]
Set of 3 color coded 36" AmpFlex 193-36 probes (6500A) + 10ft leads [+$959.00]
Set of 3 color coded MR193 probes (1000Aac/1400Adc) + 10ft leads [+$819.00]
Set of 3 color coded MR193 probes (6A/120A) + 10ft leads [+$589.00]
5A adapter box [+$895.00]
Set of 4 color coded 30ft voltage leads (600V CAT IV 10A) [+$129.00]
Set of 3 color coded MN93-30 probes (240A) + 30ft leads [+$589.00]
Set of 3 color coded SR193-30 probes (1200A) + 30ft leads [+$799.00]
Set of 3 color coded 24" AmpFlex 193-24-30 sensors (6500A) + 30ft leads [+$799.00]
Set of 3 color coded 36" AmpFlex 193-36-30 sensors (6500A) + 30ft leads [+$1,088.00]
1 AC/DC current probe model MR193-BK (black connector) (1000Aac/1400Adc) [+$289.00]
Set of 3 color coded MN193-30 probes (6A/120A) + 30ft leads [+$729.00]
Set of 3 color coded MN193-30 probes (1000Aac/1400Adc) + 30ft leads [+$949.00]
NIST Calibration NIST Calibration [+$190.00]

AEMC 3945-B 3945 B 2130.78 193-36 Three Phase Power Quality Analyzer

The AEMC 3945-B PowerPad Three-Phase Power Quality Analyzer is a hand held 3-phase power quality meter that has a large easy to read color graphical display.


Measurements are displayed graphically and numerically with colored waveforms. The menu driven meter features pop up functions which are push button activated. All necessary measurements are available for a comprehensive power system check or analysis to 830 Volts rms, 6500 Amps rms, along with a complete family of clamp on and flexible probes.


The 3945-B PowerPad has an event capture function, a transient capture function, a logging function, an optical RS-232, and advanced DataView software which can pilot the PowerPad as well as provide comprehensive reports.


3945-B with AmpFlex 193-36 Features

  • PowerPad Model 3945-B with 3 color coded 36" AmpFlex 193-36 (6500 Amp) flexible current probes
  • True RMS single, 2, and 3 phase measurements at 256 samples per cycle, plus DC
  • Real time color waveforms
  • Easy on screen setup
  • True RMS current and voltage measurements
  • Measures DC volts, power, and amps
  • Display and capture current, voltage, and harmonics to the 50th order, including direction in real time
  • Phasor Diagram Display
  • VAR, VA, and W per phase and total
  • kWh, VARh, and KVAh
  • Neutral current display for three-phase
  • Transformer K-factor display
  • Power Factor displacement PF display
  • Captures up to a maximum of50 transients
  • Short term flicker display
  • Phase unbalance for current and voltage
  • total and individual Harmonic Distortion




  • Verification of power distribution circuits
  • recording and measurement of power system quality - kW, VA, VAR
  • Energy metering - kVAh, VARh, kWh
  • In plant troubleshooting of individual machinery and power distribution panels
  • Monitor pad mount transformers
  • Determine harmonic problems originating from load or source
  • Monitor phase balances
  • Determine transformer K-factor
  • Many more functions
Sampling Frequency 256 samples per cycle
Data Storage 4MB partitioned for waveforms, transients, alarms and trend recording
Voltage (TRMS) Phase-to-Phase: 830V Phase-to-Neutral: 480V
Current (TRMS) MN Clamp: 0 to 6A/120A or 0 to 240A
MR Clamp: 0 to 1200AAC, 0 to 1400ADC
SR Clamp: 0 to 1200A
AmpFlex: 0 to 6500A¹
Single-Phase RMS Voltages 6 to 480 Volts 0.1 Volts ±0.5 percent ± 2cts
Phase-to-Phase RMS Voltages 10 to 830 Volts 0.1 Volts ±0.5 percent ± 2cts
Single-Phase Peak Voltages 6 to 680 Volts 1 Volts ±(1 percent + 5cts)
Phase-to-Phase Peak Voltages 10 to 1360 Volts 1 Volts ±(1 percent + 5cts)
Frequency (Hz) 40 to 69Hz 0.01Hz ±0.01Hz
DC Voltage Component 6 to 650 Volts 0.1 Volts ±1 percent ± 2cts
Current Probes
  MN Clamp
  SR Clamp
  AmpFlex Probe

0 to 240A
0 to 1200A
10 to 6500A

0.1A; 1A >e; 1000A
0.1A; 1A >e; 1000A

±(0.5 percent + 2cts)
±(0.5 percent + 2cts)
±(0.5 percent + 1A)
Active (Real) Power (kW) 0 to 9999kW 4 digits (10,000ct) ±1 percent ± 1ct @ PF >e;0.8
Reactive Power (kVAR) 0 to 9999kVAR 4 digits (10,000ct) ±1 percent ± 1ct @ PF <e;0.8
Apparent Power (kVA) 0 to 9999kVA 4 digits (10,000ct) ±1 percent ± 1ct
Power Factor (PF & DPF) -1.000 to 1.000 0.001 ±(1.5 percent + 0.01)
Active Energy (kWh) 0 to 9999MWh 4 digits (10,000ct) ±1 percent ± 1ct @ PF >e;0.8
Reactive Energy (kVARh) 0 to 9999MVARh 4 digits (10,000ct) ±1 percent ± 1ct @ PF <e;0.8
Apparent Energy (kVAh) 0 to 9999MVAh 4 digits (10,000ct) ±1 percent ± 1ct
Unbalance (V & A) 0 to 100 percent  0.1 percent  ±1 percent ± 1ct
Phase Angle (V-A, A-A, V-V)) -179 to +180 degrees 1 degree ±2 degrees ± 1ct
Harmonics (1st to 50th)
  F = 40 to 69Hz
  (V >e; 50V, A > Inom/100)
0 to 999 percent  0.1 percent  ±1 percent + 5cts
Total Harmonic Distortion (V & A) 0 to 999 percent  0.1 percent  ±1 percent + 5cts
K-factor (Akf) 1 to 99.99 0.01 ±5 percent ± 1ct
Flicker (PST) 0.00 to 9.99 0.01 -
Power Source 9.6 Volts NiMH rechargeable battery pack
AC supply: 110/230VAC ±20 percent (50/60Hz)
Battery Life 6 hours with display on; <e;96 hrs with display off (record mode)
Operating Temperature 32 to 122 degrees F (0 to 50 degrees C)
Storage Temperature -4 to +122 degrees F (-20 to +50 degrees C)
Display 1/4 VGA (320 x 240) color LCD
Dimensions 9.5 x 7 x 2 inches (240 x 180 x 55 millimeters)
Weight 4.6 pounds (2.1kg)
Safety Rating EN 61010-1, 600 Volts Cat. III, Pollution Degree 2
Double Insulation Yes
CE Mark Yes
    ¹ Crest Factor at 6500A = 1
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