Fluke 345 Data Sheet

Fluke 345

N10140

Power Quality Clamp Meter

The ideal meter for commissioning and
troubleshooting modern electrical loads

With a bright color display to analyze the harmonic
spectrum, a low-pass filter to remove high frequency noise,
and a high EMC immunity design, the Fluke 345 is ideal for
measurements on switching loads such as variable frequency
drives, electronic lighting and UPS systems. Additionally, the
Hall Effect measurement system makes measurement of dc
current possible without the need to break the circuit, and
the internal memory enables long-term logging for analysis of
trends or intermittent problems.

Technical DataTechnical Data

 AC/DC current: Clamp-on measurement of ac current up to 1400 A

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rms and dc current up to 2000 A without breaking the circuit

 Highest safety rating: 600 V CAT IV rated for use at

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the service entrance

 Accurate in noisy environments: Even with distorted

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waveforms present on electronic loads with low-pass filter

 Data logging: Identify intermittent faults by

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logging any power parameters for minutes or
months, including harmonics

 Verify batteries: Direct measurement of dc ripple

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(%) for battery and dc systems

 Troubleshoot harmonics: Analyze and log

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harmonics digitally or graphically

 Inrush current: Capture and analyze nuisance tripping,

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from 3 seconds to 300 seconds

 Easy to use: Easily confirm instrument setup with

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large backlit color display of waveforms and trends

 3-Phase power: Built in capability for balanced loads

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 View graphs and generate reports: With included

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Power Log software

Applications

Set up and troubleshoot variable frequency drives
and UPS systems - Verify correct operation by

measuring key 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

Log measured parameters

All voltage, current, power, and harmonic measurements
can be logged for minutes, hours, or months. Measurement
averaging periods from 1 second to 15 minutes can be selected
depending on the application.
Measured parameters can be logged into three separate
recording memory areas. If longer recordings are required, the
three areas may be combined into one. Stored measurements
can be recalled and displayed on-screen in normal screen
format or downloaded using the Power Log software package.

Image Placeholder

(application photo related to VFDs)

Log parameters over time to track
down intermittent faults.

Harmonics measurements—view key
harmonic factors such as distortion factor
and total harmonic distortion, as well
as individual harmonics up to the 30th
harmonic.

2 Fluke Corporation Fluke 345 Power Quality Clamp Meter

Flexible and easy to use

The 345 measures a wide range of electrical parameters and
can be used for many applications in today’s modern electrical
environment. Measuring mode is selected by a simple turn of
the rotary switch and the large color display presents data in
a clear, easy-to-understand way.

By default the display will show the most common
measurements, in very large format. If more detailed views
are required they are available with the press
of a single key (up to six measurements at once).

Equipment performance
measurement - power consumed
by single- and three-phase
balanced loads.

Analysis and reporting software

Designed to quickly view recorded data, the
included Power Log software displays all recorded
parameters on interactive trends. Generate
professional reports with the ‘Report Writer’
function, or copy and paste images into report
document manually.

Easy-to-use tabbed window format allows

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quick data evaluation.

One-step download and display capability

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Waveform, harmonics, and trend download

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Simple data export to other applications

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View recorded data
in simple graphs
and tables.

View waveforms for equipment
checking and setup.

Inrush current

Diagnose equipment start-ups with the inrush current mode.
A current trigger level is set prior to recording. Once the level
has been exceeded, the meter will begin capture. Recordings
from 3 seconds to 300 seconds may be captured, and up to
1000 inrush events may be stored in the instruments memory.

Screen captures and data logging

Any measurement can be stored in memory for later viewing,
or downloaded to a PC. Simply press ‘SAVE’ to capture the
active screen to memory – up to 50 screen shots can be
saved for quick and simple documentation. Additionally, over
150,000 individual measurements can be logged for later
review on the display or on a PC using Power Log software.

Easily customize

the report.

3 Fluke Corporation Fluke 345 Power Quality Clamp Meter

Create professional
reports.

General 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 BE345

Input 110 V/230 V, 50/60 Hz
Output 15 V dc, 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
Temperature coefficient of voltage
Maximum relative humidity 80 % for temperatures up to 31 °C (87 °F) decreasing linearly to 50 % relative humidity at

Maximum operating altitude 2000 m

≤ ± 0.15 % of rdg per °C
≤ ± 0.15 % of rdg per °C

40 °C (104 °F)

Electrical safety

Safety IEC 61010-1 600 V CAT IV, double or reinforced insulation, pollution degree 2
Protection IP40; EN60529

Maximum safe working voltages

Current measurement 600 V ac rms or dc between uninsulated conductor and ground
Voltage measurement 600 V ac 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 class B
Immunity IEC/EN 61326-1:1997

Mechanical

Dimensions (length x width x depth) 300 mm x 98 mm x 52 mm (12 in x 3.75 in 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.

4 Fluke Corporation Fluke 345 Power Quality Clamp Meter