Fluke 345
Power Quality Clamp Meter
Technical Data
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.
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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 rated for use at
the service entrance
Accurate in noisy environments:
Even with distorted
waveforms present on electronic loads with low-pass filter
Data logging:
Identify intermittent faults by
logging any power parameters for minutes or
months, 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 instrument setup with
large backlit color display of waveforms and trends
3-Phase power:
Built in capability for balanced loads
View graphs and generate reports:
With included
Power Log software
N10140
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
Image Placeholder
(application photo related to VFDs)
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.
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 30
th
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).
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.
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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Easy-to-use tabbed window format allows
Equipment performance
measurement - power consumed
by single- and three-phase
balanced loads.
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.
Easily customize
the report.
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.
Create professional
reports.
3 Fluke Corporation
Fluke 345 Power Quality Clamp Meter
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
Battery Eliminator BE345
Input
Output
110 V/230 V, 50/60 Hz
15 V dc, 300 mA
>
10 hours (backlight on full)
>
12 hours (backlight reduced)
Ambient conditions
(For indoor use only)
Reference conditions
Operating temperature
Temperature coefficient of current
Temperature coefficient of voltage
Maximum relative humidity
Maximum operating altitude
All accuracies stated at 23 °C ± 1 °C (73.4 °F ± 1.8 °F)
0 °C to 50 °C (32 °F to 122 °F)
≤
± 0.15 % of rdg per °C
≤
± 0.15 % of rdg per °C
80 % for temperatures up to 31 °C (87 °F) decreasing linearly to 50 % relative humidity at
40 °C (104 °F)
2000 m
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
Voltage measurement
600 V ac rms or dc between uninsulated conductor and ground
600 V ac rms or dc between either input terminal and ground, or 825 V between energized
phase voltages (delta power config.)
EMC
Emission
Immunity
IEC/EN 61326-1:1997 class B
IEC/EN 61326-1:1997
Mechanical
Dimensions (length x width x depth)
Weight including batteries
Jaw opening
Jaw capacity
Cleaning
300 mm x 98 mm x 52 mm (12 in x 3.75 in x 2 in)
820 g/1.8 lb
60 mm
58 mm diameter
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
Specifications
Electrical data
All accuracies stated at 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
Autorange facility
Resolution
0 to 2000 A dc or 1400 ac rms
40 A/400 A/2000 A
10 mA in 40 A range
100 mA in 400 A range
1 A in 2000 A range
Accuracy
DC and dc rms
I
>
10 A
I
<
10 A
AVG
I
>
10 A
I
<
10 A
Pk
I
>
10 A
I
<
10 A
AHr
I
>
10 A
I
<
10 A
CF (Crest Factor)
1.1 ≤ CF
<
3
3
≤ CF
<
5
Resolution
RPL (Ripple)
2 %
≤
RPL
<
100 %
100 %
≤
RPL
<
600 %
Resolution
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)
± 3 % rdg ± 5 digits
± 5 % rdg ± 5 digits
0.1 %
± 3 % rdg ± 5 digits
± 5 % rdg ± 5 digits
0.01
± 2 % rdg ± 5 digits
± 0.5 AHr
± 5 % rdg ± 5 digits
± 0.5 A
± 3 % rdg ± 5 digits
± 0.5 A
± 1.5 % rdg ± 5 digits
± 0.2 A
5 Fluke Corporation
Fluke 345 Power Quality Clamp Meter
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