AC and DC current and voltage measurement – ideal tool for troubleshooting and logging on power electronics

The Fluke 345 is more than an electric power meter. Combining the functions of a clamp meter, oscilloscope, data logger and digital power meter into one handy device, the Fluke 345 is ideal for working with variable frequency motor drives, high efficiency lighting and other loads using switching electronics.

The multi-faceted Fluke 345 is packed with features such as a bright, color display to analyze the harmonic spectrum, a low-pass filter to remove high frequency noise and a high EMC immunity design, making the Fluke 345 power analyzer ideal for troubleshooting power quality on switching loads. The internal memory of this electric power meter enables long-term power quality logging for analysis of trends or intermittent problems. Additionally, the Hall Effect clamp meter design makes measurement of dc current possible without the need to break the circuit.

Besides effectively performing basic tasks like measuring power and power factor, the Fluke 345 power meters offer the ease of use, portability and flexibility needed to resolve most power issues in commercial, industrial and residential settings.

• Setup and troubleshoot variable frequency drives and UPS systems - Verify correct operation by measuring key power quality parameters
• Harmonics measurements - Uncover harmonic issues that can damage or disrupt critical equipment
• Inrush capture - Check start-up current where spurious resets or nuisance circuit breaker tripping occurs
• Load studies - Verify electrical system capacity before adding loads

• • AC/DC current: Clamp-on measurement of ac current up to 1400 A rms and dc current up to 2000 A without breaking the circuit
  • Highest safety rating: 600 V CAT IV power analyzer is rated for use at the service entrance
  • Accurate in noisy environments: Clamp meter performs even with distorted waveforms present on electronic
  loads with low-pass filter
  • Data logging: Identify intermittent faults by logging any power quality parameter for minutes, or over a month, including harmonics
  • Verify batteries: Direct measurement of dc ripple (%) for battery and dc systems
  • Troubleshoot harmonics: Analyze and log harmonics digitally or graphically
  • Inrush current: Capture and analyze nuisance tripping, from 3 seconds to 300 seconds
  • Easy to use: Easily confirm power meter setup with large backlit color display of waveforms and trends
  • USB download: Download logged data with PowerLog application software to view trends and screenshots, analyze and create reports simply.
  • Battery eliminator: powers the instrument when pefroming extended logging sessions.
  • 3-Phase power: Built in capability for balanced loads
  • View graphs and generate reports: Use power analyzer with included Power Log software

• Specifications
  Display	Color transmissive LCD 320 x 240 pixels (70 mm diagonal) with 2 level backlight
  Power supply	Battery type 1.5 V Alkaline AA MN 1500 or IEC LR6 x 6
  Battery life typically	> 10 hours (backlight on full) > 12 hours (backlight reduced)
  Battery eliminator	Input	110/230 V 50/60 Hz
  	Output	15 VDC, 300 mA
  Ambient conditions (for indoor use only)
  Reference conditions	All accuracies stated at 23°C ±1°C (73.4°F ±1.8°F)
  Operating temperature	0°C to 50°C (32°F to 122°F)
  Temperature coefficient of current	≤ ±0.15% of rdg per °C
  Temperature coefficient of voltage	≤ ±0.15% of rdg per °C
  Maximum relative humidity	80% for temperatures up to 31°C (87°F) decreasing linearly to 50% relative humidity at 40°C (104°F)
  Maximum operating altitude	2000 m
  Electrical safety
  Maximum safe working voltages	Safety IEC 61010-1 600 V CAT IV double or reinforced insulation, pollution degree 2 Protection IP40; EN60529
  Current measurement	600 VAC rms or DC between uninsulated conductor and ground
  Voltage measurement	600 VAC rms or DC between either input terminal and ground, or 825 V between energized phase voltages (delta power config.)
  EMC
  Emission	IEC/EN 61326-1:1997 A
  Immunity	IEC/EN 61326-1:1997 Annex C Performance Criterion B
  Mechanical
  Dimensions (L x W x D)	300 x 98 x 52 mm (12 x 3.75 x 2 in)
  Weight including batteries	820 g (1.8 lb)
  Jaw opening	60 mm
  Jaw capacity	58 mm diameter
  Cleaning	The unit can be cleaned with an Isopropanol impregnated cloth. Do not use abrasives or other solvents.
  Electrical data
  Accuracy	23°C ±1°C (73.4°F ±1.8°F). See Ambient conditions specifications for temperature coefficients.
  Current measurement (DC, DC rms, AC rms)
  Measuring range	0 to 2000 A DC or 1400 AC rms
  Autorange facility	40 A / 400 A / 2000 A
  Resolution	10 mA in 40 A range 100 mA in 400 A range  A in 2000 A range
  Accuracy: DC and DC rms	I > 10 A	±1.5% rdg ±5 digits
  	I < 10 A	±0.2 A
  Accuracy: AVG	I > 10 A	±3% rdg ±5 digits
  	I < 10 A	±0.5 A
  Accuracy: Pk	I > 10 A	±5% rdg ±5 digits
  	I < 10 A	±0.5 A
  Accuracy: AHr	I > 10 A	±2% rdg ±5 digits
  	I < 10 A	±0.5 AHr
  Accuracy: CF (Crest Factor)	1.1 ≤ CF < 3	±3% rdg ±5 digits
  	3 ≤ CF < 5	±5% rdg ±5 digits
  	Resolution	0.01
  Accuracy: RPL (Ripple)	2% ≤ RPL < 100%	±3% rdg ±5 digits
  	100% ≤ RPL < 600%	±5% rdg ±5 digits
  	Resolution	0.1%
  	I DC > 5 A, I AC > 2 A
  	All measurements DC and 15 Hz to 1 kHz  Maximum overload 10,000 A or rms x frequency < 400,000  Amps rms is a true-rms measurement (AC + DC)
  Voltage measurement (DC, DC rms, AC rms)
  Measuring range	0 to 825 VDC or AC rms
  Autorange facility	4 V / 40 V / 400 V / 750 V
  Resolution	1 mV in 4 V range 10 mV in 40 V range  100 mV in 400 V range  1 V in 750 V range
  Accuracy: DC and DC rms	V > 1 V	±1% rdg ±5 digits
  	V < 1 V	±0.02 V
  Accuracy: AVG	V > 1 V	±3% rdg ±5 digits
  	V < 1 V	±0.03 V
  Accuracy: Pk	V > 1 V	±5% rdg ±5 digits
  	V < 1 V