Fluke 1736 and 1738 Three-Phase Power Quality Loggers

Fluke 1736 and 1738 Three-Phase Power Quality Loggers is rated 3.7 out of 5 by 3.
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  • Fluke 1738 Advanced Power Logger 1
  • Fluke 1738 Advanced Power Logger
  • Fluke 1736 Power Logger
  • Fluke 1738 Advanced Power Logger

Key features

  • Versatile, three-phase power loggers for conducting energy, load and power quality studies.
  • Automatically capture and log voltage, current, power, harmonics and associated power quality values, and capture dips, swells, and inrush currents with event waveform snapshots and high-resolution RMS profiles.
  • Convenient instrument powering directly from the measured circuit
  • Download and analyze every detail of energy consumption and power quality state of health with our automated reporting.

Product overview: Fluke 1736 and 1738 Three-Phase Power Quality Loggers

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.

Get the Fluke Guide to Choosing Power Quality Tools  

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).

Other useful features

  • 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
  • 1738 also 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

Log the most common parameters

Designed to measure the most critical three phase power parameters, the 1736 and 1738 can simultaneously log rms voltage, rms current, voltage and current events, voltage and current THD, voltage and current harmonics up to the 50th harmonic, active power, reactive power, power factor, active energy, reactive energy, and more. With enough memory for more than a year of data logging, the 1736 and 1738 can uncover intermittent or hard-to-find issues that might otherwise have been missed.

Analysis and reporting

Capturing logged data is just one part of the task. Once you have the data, you need to create useful information and reports that can be easily shared and understood by your organization or customers. Fluke Energy Analyze Plus software makes that task as simple as possible. With powerful analysis tools and the ability to create customized reports in minutes you’ll be able to communicate your findings and quickly solve problems so you can optimize system reliability and savings.

What's in the box:

  • 1738 Power Logger
  • Power supply
  • Voltage test leads
  • Alligator clips (4x)
  • Soft case
  • Energy Analyze Plus software
  • Magnetic hanging strap
  • Magnetic voltage probes (x4)
  • Line cords
  • Color coding set

Specifications: Fluke 1736 and 1738 Three-Phase Power Quality Loggers

Specifications
Accuracy
ParameterRangeResolutionIntrinsic Accuracy at Reference Conditions (% of Reading +% of Full Scale)
Voltage1000 V0.1 V±(0.2% + 0.01%)
Current: Direct inputi17xx-flex 1500 12"150 A0.1 A±(1% + 0.02%)
1500 A1 A±(1% + 0.02%)
i17xx-flex 3000 24"300 A1 A±(1% + 0.03%)
3000 A10 A±(1% + 0.03%)
i17xx-flex 6000 36"600 A1 A±(1.5% + 0.03%)
6000 A10 A±(1.5% + 0.03%)
i40s-EL clamp4 A1 mA±(0.7% + 0.02%)
40 A10 mA±(0.7% + 0.02%)
Frequency42.5 Hz to 69 Hz0.01 Hz±(0.1%)
Auxillary input±10 V dc0.1 mV±(0.2% + 0.02%)
Voltage min/max1000 V0.1 V±(1% + 0.1%)
Current min/maxDefined by accessoryDefined by accessory±(5% + 0.2%)
THD on voltage1000%0.1%±0.5
THD on current1000%0.1%±0.5
Voltage harmonics 2nd to 50th1000 V0.1 V≥ 10 V: ±5% of reading
< 10 V: ±0.5V
Current harmonics 2nd to 50thDefined by accessoryDefined by accessory≥ 3% of current range: ±5% of reading
< 3% of current range: ±0.15% of range
Unbalance100%0.1%±0.2
Intrinsic Uncertainty ±(% of reading +% of range)¹
ParameterInfluence quantityiFlex1500-12iFlex3000-24iFlex6000-36i40S-EL
150 A / 1500 A300 A / 3000 A600 A / 6000 A4 A / 40 A
Active Power PPF ≥ 0.991.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Active Energy EaPF ≥ 0.991.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Apparent power S0 ≤ PF ≤ 11.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Apparent Energy Eap0 ≤ PF ≤ 11.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Reactive power Q0 ≤ PF ≤ 12.5% of measured apparent power
Reactive Energy Er0 ≤ PF ≤ 12.5% of measured apparent power
Power Factor PF-±0.025
Displacement Power Factor-±0.025
DBF/cosϕ-±0.025
Additional uncertainty in% of range¹VP-N>250 V0.015%0.0225%0.0225%0.015%
¹Range = 1000 V x Irange
Reference conditions:
  • Environmental: 23 °C ±5 °C, instrument operating for at least 30 minutes, no external electrical/magnetic field, RH <65%
  • Input conditions: Cosϕ/PF=1, Sinusoidal signal f=50 Hz/60 Hz, power supply 120 V/230 V ±10%.
  • Current and power specifications: Input voltage 1 ph: 120 V/230 V or 3 ph wye/delta: 230 V/400 V Input current: I > 10% of Irange
  • Primary conductor of clamps or Rogowski coil in center position
  • Temperature coefficient: Add 0.1 x specified accuracy for each degree C above 28 °C or below 18 °C
 
Electrical Specifications
Power Supply
Voltage range100 V to 500 V using safety plug input when powering from the measurement circuit
100 V to 240 V using standard power cord (IEC 60320 C7)
Power consumptionMaximum 50 VA (max. 15 VA when powered using IEC 60320 input)
Efficiency≥ 68.2% (in accordance with energy efficiency regulations)
Maximum no-load consumption< 0.3 W only when powered using IEC 60320 input
Mains power frequency50/60 Hz ±15%
BatteryLi-ion 3.7 V, 9.25 Wh, customer-replaceable
On-battery runtimeFour hours in standard operating mode, up to 5.5 hours in power saving mode
Charging time< 6 hours
Data Acquisition
Resolution16-bit synchronous sampling
Sampling frequency10.24 kHz at 50/60 Hz, synchronized to mains frequency
Input signal frequency50/60 Hz (42.5 to 69 Hz)
Circuit types1-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 storageInternal flash memory (not user replaceable)
Memory sizeTypical 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 parametersVoltage, current, aux, frequency, THD V, THD A, power, power factor, fundamental power, DPF, energy
Averaging intervalUser selectable: 1 sec, 5 sec, 10 sec, 30 sec, 1 min, 5 min, 10 min, 15 min, 30 min
Averaging time min/max valuesVoltage, Current: Full cycle RMS updated every half cycle (URMS1/2 according to IEC61000-4-30 Aux, Power: 200ms
Demand Interval (Energy Meter Mode)
Measured parametersEnergy (Wh, varh, VAh), PF, maximum demand, cost of energy
IntervalUser selectable: 5 min, 10 min, 15 min, 20 min, 30 min, off
Power Quality Measurements
Measured parameterVoltage, frequency, unbalance, voltage harmonics, THD V, current, harmonics, THD A, TDD
Averaging interval10 min
Individual harmonics2nd to 50th harmonic
Total harmonic distortionCalculated on 50 harmonics
EventsVoltage: dips, swells, interruptions, current: inrush current
Triggered recordingsFull cycle RMS updated every half cycle of voltage and current (Urms1/2 according to IEC61000-4-30)
Waveform of voltage and current (1738)
Standards Compliance
HarmonicsIEC 61000-4-7: Class 1
IEEE 519 (short time harmonics)
Power qualityIEC 61000-4-30 Class S, IEC62586-1 (PQI-S device)
PowerIEEE 1459
Power quality complianceEN50160 (for measured parameters)
Interfaces
USB-AFile transfer via USB flash drive, firmware updates
Max. current: 120 mA
WiFiFile transfer and remote control via direct connection or WiFi infrastructure
BluetoothRead auxiliary measurement data from Fluke Connect® 3000 series modules (requires 1738 or 1736 upgrade option)
USB-miniData download device to PC
Voltage Inputs
Number of inputs4 (3 phases and neutral)
Maximum input voltage1000 Vrms, CF 1.7
Input impedance10 MΩ
Bandwidth (-3 dB)42.5 Hz - 3.5 kHz
Scaling1:1 and variable
Measurement category1000 V CAT III/600 V CAT IV
Current Inputs
Number of inputs4, mode selected automatically for attached sensor
Input voltageClamp input: 500 mVrms/50 mVrms; CF 2.8
Rogowski coil input150 mVrms/15 mVrms at 50 Hz, 180 mVrms/18 mVrms at 60 Hz; CF 4; all at nominal probe range
Range1 A to 150 A/10 A to 1500 A with thin flexible current probe i17XX-flex1500 12"
3 A to 300 A/30 A to 3000 A with thin flexible current probe i17XX-flex3000 24"
6 A to 600 A/60 A to 6000 A with thin flexible current probe i17XX-flex6000 36"
40 mA to 4 A/0.4 A to 40 A with 40 A clamp i40s-EL
Bandwidth (-3 dB)42.5 Hz - 3.5 kHz
Scaling1:1 and variable
Auxiliary Inputs
Number of inputs2
Input range0 to ±10 V dc, 1reading/s
Scale factorFormat: mx + b (gain and offset) user configurable
Displayed unitsUser configurable (7 characters, for example, °C, psi, or m/s)
Wireless Connection
Number of inputs2
Supported modulesFluke Connect® 3000 series
Acquisition1 reading/s
Environmental Specifications
Operating temperature-10 °C to +50 °C (14 °F to 122 °F)
Storage temperature-20 °C to +60 °C (-4 °F to 140 °F), with battery: -20 °C to +50 °C (-4 °F to 122 °F)
Operating humidity10 °C to 30 °C (50 °F to 86 °F) max. 95% RH
30 °C to 40 °C (86 °F to 104 °F) max. 75% RH
40 °C to 50 °C (104 °F to 122 °F) max. 45% RH
Operating altitude2000 m (up to 4000 m derate to 1000 V CAT II/600 V CAT III/300 V CAT IV)
Storage altitude12,000m
EnclosureIP50 in accordance with EN60529
VibrationMIL-T-28800E, Type 3, Class III, Style B
SafetyIEC 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 compatibilityEN 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 coefficient0.1 x accuracy specification/°C
General Specifications
Color LCD display4.3-inch active matrix TFT, 480 pixels x 272 pixels, resistive touch panel
WarrantyInstrument and power supply: Two-years (battery not included)
Accessories: one-year
Calibration cycle: two-years
DimensionsInstrument: 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)
WeightInstrument: 1.1 kg (2.5 lb)
Power supply: 400 g (0.9 lb)
Tamper protectionKensington lock slot
i17xx-flex 1500 12" Flexible Current Probe Specifications
Measuring range1 to 150 A ac/10 to 1500 A ac
Nondestructive current100 kA (50/60 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 range0.05% of reading/°C 0.09% of reading/°F
Working voltage1000 V CAT III, 600 V CAT IV
Probe cable length305 mm (12 in)
Probe cable diameter7.5 mm (0.3 in)
Minimum bending radius38 mm (1.5 in)
Output cable length2 m (6.6 ft)
Weight115 g
Probe cable materialTPR
Coupling materialPOM + ABS/PC
Output cableTPR/PVC
Operating temperature-20 °C to +70 °C (-4 °F to 158 °F) temperature of conductor under test shall not exceed 80 °C (176 °F)
Temperature, non-operating-40 °C to +80 °C (-40 °F to 176 °F)
Relative humidity, operating15% to 85% non-condensing
IP ratingIEC 60529:IP50
WarrantyOne-year
* Reference condition:
  • Environmental: 23 °C ±5 °C, no external electrical/magnetic field, RH 65%
  • Primary conductor in center position

Models: Fluke 1736 and 1738 Three-Phase Power Quality Loggers

Fluke 1738/B
Fluke 1738/B Advanced Power Logger, Basic version (excludes current probes)

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Includes:

  • 1738 Power Logger
  • Power supply
  • Voltage test leads
  • Alligator clips (4x)
  • Soft case
  • Energy Analyze Plus software
  • Magnetic hanging strap
  • Magnetic voltage probes (x4)
  • Line cords
  • Color coding set
Fluke 1738/EUS
Fluke 1738/EUS Advanced Power Logger, EU and US version (includes current probes)

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Includes:

  • 1738 Power Logger
  • Power supply
  • Voltage test leads
  • Alligator clips (x4)
  • 12 in 1,500A flexible current probe (x4)
  • Soft case
  • Energy Analyze Plus software
  • Magnetic hanging strap
  • Magnetic voltage probes (x4)
  • WiFi/BLE adapter
  • Line cords
  • Color coding set
Fluke 1738/INTL
Fluke 1738/INTL Advanced Power Logger

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Portable Advanced Power Logger International Version

Includes:

  • Fluke 1738 instrument
  • Voltage test leads set
  • Alligator clips (4x)
  • 12 in 1,500A flexible, current probe (4x)
  • Soft case
  • Energy Analyze Plus software
  • Line cords
  • Color coding set
Fluke 1736/B
Fluke 1736/B Portable Power Logger, Basic version (excludes current probes)

Buy it

Includes:

  • 1736 Power Logger
  • Power supply
  • Voltage test leads
  • Alligator clips (x4)
  • Soft case
  • Energy Analyze Plus software
  • Line cords
  • Color coding set
Fluke 1736/EUS
Fluke 1736/EUS Portable Power Logger, EU and US version (includes current probes)

Buy it

Includes:

  • 1736 Power Logger
  • Power supply
  • Voltage test leads
  • Alligator clips (x4)
  • 12 in 1,500A flexible, current probe (x4)
  • Soft case
  • Energy Analyze Plus software
  • Wi-Fi/BLE adapter
  • Line cords
  • Color coding set
Fluke 1736/INTL
Fluke 1736/INTL Power Logger

Buy it

Portable Power Logger International Version

Includes:

  • Fluke 1736 instrument
  • Voltage test leads set
  • Alligator clips (4x)
  • 12 in 1,500A flexible, current probe (4x)
  • Soft case
  • Energy Analyze Plus software
  • Line cords
  • Color coding set

Can you use a Fluke 1738 with i40s-EL clamps to diagnose an earth leakage fault?

Asked by: bwilsk
The Fluke-1738 works with the i40s-EL but the real question is how high and or low of current is expected for the application. The range the i40s-EL working in conjunction with the Fluke-1738 is from 40mA to 40A. The leakage current clamp meter we offer is the Fluke-368 FC and its range is from 1uA up to 60A. No, the Fluke-1738 and i40s-EL do not have the range to support an Earth Leakage Fault application.
Answered by: FlukeCorporation
Date published: 2024-06-11

I need to replace an old computer that was being used to view, and create reports from, our 1738 data logger files. What is the minimum computer requirements for doing this?

Asked by: AGU1
Please contact Fluke's tech support team at tech.support@fluke.com or 800-443-5853 to verify the minimum computer requirements for the Fluke 1736 and 1738 Three-Phase Power Quality Loggers.
Answered by: FlukeCorporation
Date published: 2024-04-17

Does the 1738 Power Quality Logger measure flicker? The specifications mention the 50160 and IEC 61000-4-30 standards which both include flicker measurements and limits, but the manual for the 1738 doesn't mention flicker, i.e. measuring Pst and Plt.

Asked by: Paul O
The Fluke-1738 is IEC 61000-4-30 Class S and it does not include Flicker measurement. The Flicker parameters are covered for IEC 61000-4-30 Class A instruments. Instruments that do have that feature include the Fluke 1748, 1775 and 1777.
Answered by: FlukeCorporation
Date published: 2024-03-28

When events such as sags, swells and interruptions are captured by the 1738, is the waveform during the event also stored? If so, how is it accessed? If it is not, what model would perform this function?

Asked by: MKE Mark
For questions about detailed operation of your Fluke products, please contact Fluke's tech support team at tech.support@fluke.com or 800-443-5853.
Answered by: FlukeCorporation
Date published: 2024-03-19

When I try to download file into fluke energy analyze plus 3.11 i get a &quot;PQT translator tool not found error&quot;

Asked by: jamieg
Please contact Fluke's tech support team at tech.support@fluke.com or 800-443-5853.
Answered by: FlukeCorporation
Date published: 2024-03-28

Which is the latest model of Power Quality Analyser, the Fluke 1738 or the fluke 435-II?

Asked by: JBartz
The Fluke 1738 is newer than the Fluke 435-II.
Answered by: FlukeCorporation
Date published: 2023-10-18

Will this device function without the WIFI/Bluetooth Adapter? Is this device also TAA-compliant?

Asked by: Esteban
Yes, the Fluke 1736 and 1738 Three-Phase Power Quality Loggers work without using the WiFi or Bluetooth adapter and are TAA compliant.
Answered by: FlukeCorporation
Date published: 2023-10-05

Does the power logger 1738 measure DC current??

Asked by: Anonymous
The Fluke 1736 and 1738 Three-Phase Power Quality Loggers cannot measure DC. If you are looking to measure DC current we suggest the Fluke 1770 Series Three-Phase Power Quality Analyzers with Fluke 80i-2010s AC/DC Current Clamps.
Answered by: FlukeCorp
Date published: 2024-04-25
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Rated 5 out of 5 by from Great unit We upgraded to this from our older Hioki model. This works great. It is very simple to use and generate reports compared to our old unit.
Date published: 2023-01-24
Rated 1 out of 5 by from Disappointed Have not used it yet, Sure it is great but didn't come with Current Probes, Got the higher model at higher price so you would assume you would get the test leads required to use it, even the website said comes with current probes. It was an extra $1000. Its like buying a car and you need to purchase the steering wheel.
Date published: 2021-06-15
Rated 5 out of 5 by from Very Useful Tool! I use this for work (Generator Technician) and it does exactly what I need it to and when i look at the File back in the shop I can look at all the parameters it recorded. but there is still alot to learn about it
Date published: 2019-02-22
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