1738 Power Logger

It performs advanced analysis with an enhanced Power Quality Health Summary (EN50160) function that provides you with fast insight into overall electrical system health

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$7,852.00 CAD
Normally ships in 4-6 Weeks

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The Fluke 1736 and 1738 Three-Phase Power Loggers built with Fluke Connect® mobile app and desktop software compatibility give you the data you need to make critical power quality and energy decisions in real-time. The ideal test tools for conducting energy studies and basic power quality logging, the 1736 and 1738 automatically capture and log over 500 power quality parameters so you have more visibility into the data you need to optimize system reliability and savings. With the Fluke 1738 Advanced Power Logger you can perform advanced analysis with an enhanced Power Quality Health Summary (EN50160) function that provides you with fast insight into overall electrical system health. The Power Quality Health Summary is an evaluation of the logged data based on detailed power quality measurements and includes viewable event waveform captures so you have even more visibility into the data you need to optimize system reliability and savings.

An optimized user interface, flexible current probes, and an intelligent measurement verification function that allows you to reduce measurement errors by digitally verifying and correcting common connection errors makes setup easier than ever and reduces measurement uncertainty. Access and share data remotely with your team via the Fluke Connect® app so you can maintain safer working distances and make critical decisions in real-time, reducing the need for protective equipment, site visits and check-ins. You can also quickly and easily chart and graph measurements to help identify issues and create detailed reports with the included Fluke Energy Analyze Plus software package. Optionally, you can create IEEE519 Reports giving you more insight into harmonic levels, voltage and current distortion, and load current (license required).

• Present data locally on the logger, on the Fluke Connect mobile app and desktop software, or through your facility’s Wi-Fi infrastructure
• Measure all three phases and neutral with four flexible current probes (included)
• Power the instrument directly from the measured circuit
• Review measured values during logging sessions and before downloading for real-time analysis
• Includes event waveform snapshot and high-resolution RMS profile with the 1738, along with date, timestamp and severity to capture dips, swells, and inrush currents and help pinpoint potential root causes of power quality issues
• Provides fast insight into overall electrical system health with a Power Quality Health Summary
• Offers a bright, color touch-screen display for convenient field analysis and data checks
• Helps you capture the right data every time with a quick, guided, graphical user interface
• Reduces uncertainty about your connections with the intelligent verification function
• Allows you to complete field setups through the front panel or the Fluke Connect App on your smartphone
• Provides fully integrated logging with other Fluke Connect-enabled devices to simultaneously log up to two additional measurement parameters on a Fluke Connect wireless digital multimeter or module*
 • Comes with Energy Analyze Plus application software that enables you to analyze every detail of energy consumption and power quality health and create automated reports

Electrical Specifications

Power Supply

Voltage Range

100 V - 500 V using safety plug input when powering from the measurement circuit

100 V - 240 V using standard power cord (IEC 60320 C7)

Power Consumption

Maximum 50 VA (max. 15 VA when powered using IEC 60320 input)


≥ 68.2% (in accordance with energy efficiency regulations)

Maximum No-Load Consumption

< 0.3 W only when powered using IEC 60320 input

Mains Power Frequency

50 Hz / 60 Hz, +/- 15%


Lithium-ion 3.7 V, 9.25 Wh, customer-replaceable

On-Battery Run-time

4 h in standard operating mode, up to 5.5 h in power saving mode

Charging Time

< 6 h

Data Acquisition


16-bit synchronous sampling

Sampling Frequency

10.24 kHz at 50 Hz / 60 Hz, synchronized to mains frequency

Input Signal Frequency

50 Hz / 60 Hz (42.5 Hz - 69 Hz)

Circuit Types

1-φ, 1-φ IT, Split phase, 3-φ delta, 3-φ wye, 3-φ wye IT, 3-φ wye balanced, 3-φ Aron/Blondel (2-element delta), 3-φ delta open leg, Currents only (load studies)

Data Storage

Internal flash memory (not user replaceable)

Memory Size

Typical 10 logging sessions of 8 weeks with 1-minute intervals and 500 events¹

¹The number of possible logging sessions and logging period depends on user requirements.

Basic Interval

Measured Parameters

Voltage, current, aux, frequency, THD V, THD A, power, power factor, fundamental power, DPF, energy

Averaging Interval

1 s, 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min (user-selectable)

Averaging Time Min/Max Values

Voltage, Current: Full cycle RMS updated every half cycle Aux, Power (200 ms)

Demand Interval (Energy Meter Mode)

Measured Parameters

Energy (Wh, varh, VAh), PF, maximum demand, cost of energy


5 min, 10 min, 15 min, 20 min, 30 min, off (user-selectable)

Power Quality Measurements

Measured Parameter

Voltage, frequency, unbalance, voltage harmonics, THD V, current, harmonics, THD A, TDD

Averaging Interval

10 min

Individual Harmonics

2nd to 50th harmonic

Total Harmonic Distortion

Calculated on 50 harmonics

Events (Voltage)

Dips, swells, interruptions, current: inrush current

Triggered Recordings

Full cycle RMS updated every half cycle of voltage and current (1/2 Urms according to IEC61000-4-30)

Waveform of voltage and current

Standards Compliance


IEC 61000-4-7: Class 1

IEEE 519 (short time harmonics)

Power Quality

IEC 61000-4-30 Class 5, IEC62586-1 (PQI-5 device)


IEEE 1459

Power Quality Compliance

EN50160 (for measured parameters)



File transfer via USB flash drive, firmware updates
Max. current: 120 mA


File transfer and remote control via direct connection or WiFi infrastructure


Read auxiliary measurement data from Fluke Connect® 3000 series modules (requires 1734, or 1732 upgrade option)


Data download device to PC

Voltage Inputs

No. of Inputs

4 (3 phases and neutral)

Maximum Input Voltage

1000 Vrms, CF 1.7

Input Impedance

10 MΩ

Bandwidth (-3 dB)

42.5 Hz - 3.5 kHz


1:1 and variable

Measurement Category

1000 V CAT III / 600 V CAT IV

Current Inputs

No. of Inputs

4, mode selected automatically for attached sensor

Input Voltage (Clamp Input)

500 mVrms / 50 mVrms; CF 2.8

Rogowski Coil Input

150 mVrms/15 mVrms at 50 Hz, 180 mVrms/18 mVrms at 60 Hz; CF 4; all at nominal probe range


1 A - 150 A / 10 A - 1500 A with thin flexible current probe i17XX-flex1500 12 in

3 A -  300 A / 30 A -  3000 A with thin flexible current probe i17XX-flex3000 24 in

6 A -  600 A / 60 A - 6000 A with thin flexible current probe i17XX-flex6000 36 in

40 mA - 4 A / 0.4 A - 40 A with 40 A clamp i40s-EL

Bandwidth (-3 dB)

42.5 Hz - 3.5 kHz


1:1 and variable

Auxiliary Inputs

No. of Inputs


Input Range

0 to +/-10 V DC, 1 reading/s

Scale Factor

mx + b (gain and offset) user configurable

Displayed Units

User configurable (7 characters, for example, °C, PSI, or m/s)

Wireless Connection

No. of Inputs


Supported Modules

Fluke Connect® 3000 series


1 reading/s

Environmental Specifications



-10°C - 50°C (14°F - 122°F)


-20°C - 60°C (-4°F - 140°F),

-20°C - 50°C (-4°F - 122°F), with battery

Operating humidity

10°C - 30°C (50°F - 86°F) max. 95% RH

30°C - 40°C (86°F - 104°F) max. 75% RH

40°C - 50°C (104°F - 122°F) max. 45% RH



2000 m (up to 4000 m derate to 1000 V CAT II / 600 V CAT III / 300 V CAT IV)




IP50 in accordance with EN60529


MIL-T-28800E, Type 3, Class III, Style B


IEC 61010-1

IEC Mains Input: Overvoltage Category II, Pollution Degree 2

Voltage Terminals: Overvoltage Category IV, Pollution Degree 2

IEC 61010-2-031: CAT IV 600 V / CAT III 1000 V

Electromagnetic Compatibility

EN 61326-1: Industrial CISPR 11: Group 1, Class A

Korea (KCC): Class A Equipment (industrial broadcasting and communication equipment)

USA (FCC): 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103

Temperature Coefficient

0.1 x accuracy specification/°C

General Specifications

Color LCD Display

4.3 in active matrix TFT, 480 x 272 pixels, resistive touch panel


Instrument and Power Supply

2 years (battery not included)


1 year

Calibration Cycle

Calibration cycle: two-years



19.8 cm x 16.7 cm x 5.5 cm (7.8 in x 6.6 in x 2.2 in)

Power Supply

13.0 cm x 13.0 cm x 4.5 cm (5.1 in x 5.1 in x 1.8 in)

Instrument with Power Supply Attached

19.8 cm x 16.7 cm x 9 cm (7.8 in x 6.6 in x 3.5 in)



1.1 kg (2.5 lb)

Power Supply

400 g (0.9 lb)

Tamper Protection

Kensington lock slot

i17xx-flex 1500 12" Flexible Current Probe Specifications

Measuring Range

1 - 150 A AC / 10 - 1500 A AC

Nondestructive Current

100 kA (50 Hz / 60 Hz)

Intrinsic Error at Reference Condition*

+/- 0.7% of reading

Accuracy 173x + iFlex

+/- (1% of reading + 0.02% of range)

Temperature Coefficient Over Operating Temperature Range

0.05% of reading/°C (0.09% of reading/°F)

Working Voltage

1000 V CAT III, 600 V CAT IV

Probe Cable Length

305 mm (12 in)

Probe Cable Diameter

7.5 mm (0.3 in)

Minimum Bending Radius

38 mm (1.5 in)

Output Cable Length

2 m (6.6 ft)


115 g

Probe Cable Material


Coupling Material


Output Cable




-20°C - 70°C (-4°F - 158°F) temperature of conductor under test shall not exceed 80°C (176°F)


-40°C - 80°C (-40°F - 176°F)

Relative Operating Humidity

15% - 85% non-condensing

IP rating

IEC 60529:IP50


1 year



* Reference condition:

Environmental: 23°C +/- 5°C, no external electrical/magnetic field, RH 65%

Primary conductor in center position



Three-Phase Energy Loggers

Three-Phase Power Loggers


1732 Energy Logger

1734 Energy Logger

1736 Power Logger

1738 Advanced Power Logger

Load Studies

Energy Assessments

Neutral Current Measurement (Four Current Channels)



Harmonics Measurements



Voltage Event Capture



Advanced Analysis: 
Waveform and Inrush Event Capture 
PQ Health (EN51060)



Upgrade package*

IEEE519 Total Harmonic Distortion Measurements





Fully Integrated Logging with Fluke Connect®

Upgrade package*

Upgrade package*



Wi-Fi / Bluetooth



Magnetic Probe Set



Magnetic Hanger



Connection via WiFi Router

Requires FREE software license available upon product registration.

Requires FREE software license available upon product registration.


*Upgrade packages are available to upgrade existing 1732 Energy Loggers with the same features of the 1734 Energy logger, and to upgrade existing 1736 Power Loggers with the same features and capabilities of the 1738 Advanced Power Logger. Please note that 1732 and 1734 Energy Loggers cannot be upgraded with the functionality of 1736 and 1738 Power Loggers.


Connect directly to the 173X Energy or Power Logger, displaying current measurements without error prone scaling factors.
Normally ships in 4-6 Weeks
Starting At
$247.00 CAD
0.1 m test lead for connecting measurement input to Fluke 17XX Power or Energy Loggers
Normally ships in 4-6 Weeks
$55.00 CAD
1.5 m test lead for connecting measurement input to Fluke 17XX Power or Energy Loggers
Normally ships in 4-6 Weeks
$41.00 CAD