---

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
Parameter		Range	Resolution	Intrinsic Accuracy at Reference Conditions (% of Reading +% of Full Scale)
Voltage		1000 V	0.1 V	±(0.2% + 0.01%)
Current: Direct input	i17xx-flex 1500 12''	150 A	0.1 A	±(1% + 0.02%)
		1500 A	1 A	±(1% + 0.02%)
	i17xx-flex 3000 24''	300 A	1 A	±(1% + 0.03%)
		3000 A	10 A	±(1% + 0.03%)
	i17xx-flex 6000 36''	600 A	1 A	±(1.5% + 0.03%)
		6000 A	10 A	±(1.5% + 0.03%)
	i40s-EL clamp	4 A	1 mA	±(0.7% + 0.02%)
		40 A	10 mA	±(0.7% + 0.02%)
Frequency		42.5 Hz to 69 Hz	0.01 Hz	±(0.1%)
Auxillary input		±10 V dc	0.1 mV	±(0.2% + 0.02%)
Voltage min/max		1000 V	0.1 V	±(1% + 0.1%)
Current min/max		Defined by accessory	Defined by accessory	±(5% + 0.2%)
THD on voltage		1000%	0.1%	±0.5
THD on current		1000%	0.1%	±0.5
Voltage harmonics 2nd to 50th		1000 V	0.1 V	≥ 10 V: ±5% of reading
				< 10 V: ±0.5V
Current harmonics 2nd to 50th		Defined by accessory	Defined by accessory	≥ 3% of current range: ±5% of reading
				< 3% of current range: ±0.15% of range
Unbalance		100%	0.1%	±0.2
Intrinsic Uncertainty ±(% of reading +% of range)¹
Parameter	Influence quantity	iFlex1500-12	iFlex3000-24	iFlex6000-36	i40S-EL
		150 A / 1500 A	300 A / 3000 A	600 A / 6000 A	4 A / 40 A
Active Power P	PF ≥ 0.99	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Active Energy Ea	PF ≥ 0.99	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Apparent power S	0 ≤ PF ≤ 1	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Apparent Energy Eap	0 ≤ PF ≤ 1	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Reactive power Q	0 ≤ PF ≤ 1	2.5% of measured apparent power
Reactive Energy Er	0 ≤ PF ≤ 1	2.5% of measured apparent power
Power Factor PF	-	±0.025
Displacement Power Factor	-	±0.025
DBF/cosϕ	-	±0.025
Additional uncertainty in% of range¹	VP-N>250 V	0.015%	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 range	100 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 consumption	Maximum 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 frequency	50/60 Hz ±15%
Battery	Li-ion 3.7 V, 9.25 Wh, customer-replaceable
On-battery runtime	Four hours in standard operating mode, up to 5.5 hours in power saving mode
Charging time	< 6 hours
Data Acquisition
Resolution	16-bit synchronous sampling
Sampling frequency	10.24 kHz at 50/60 Hz, synchronized to mains frequency
Input signal frequency	50/60 Hz (42.5 to 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	User selectable: 1 sec, 5 sec, 10 sec, 30 sec, 1 min, 5 min, 10 min, 15 min, 30 min
Averaging time min/max values	Voltage, Current: Full cycle RMS updated every half cycle (URMS1/2 according to IEC61000-4-30 Aux, Power: 200ms
Demand Interval (Energy Meter Mode)
Measured parameters	Energy (Wh, varh, VAh), PF, maximum demand, cost of energy
Interval	User selectable: 5 min, 10 min, 15 min, 20 min, 30 min, off
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 (Urms1/2 according to IEC61000-4-30)
	Waveform of voltage and current (1738)
Standards Compliance
Harmonics	IEC 61000-4-7: Class 1
	IEEE 519 (short time harmonics)
Power quality	IEC 61000-4-30 Class S, IEC62586-1 (PQI-S device)
Power	IEEE 1459
Power quality compliance	EN50160 (for measured parameters)
Interfaces
USB-A	File transfer via USB flash drive, firmware updates Max. current: 120 mA
WiFi	File transfer and remote control via direct connection or WiFi infrastructure
Bluetooth	Read auxiliary measurement data from Fluke Connect® 3000 series modules (requires 1738 or 1736 upgrade option)
USB-mini	Data download device to PC
Voltage Inputs
Number 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
Scaling	1:1 and variable
Measurement category	1000 V CAT III/600 V CAT IV
Current Inputs
Number 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
Range	1 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
Scaling	1:1 and variable
Auxiliary Inputs
Number of inputs	2
Input range	0 to ±10 V dc, 1reading/s
Scale factor	Format: mx + b (gain and offset) user configurable
Displayed units	User configurable (7 characters, for example, °C, psi, or m/s)
Wireless Connection
Number of inputs	2
Supported modules	Fluke Connect® 3000 series
Acquisition	1 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 humidity	10 °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 altitude	2000 m (up to 4000 m derate to 1000 V CAT II/600 V CAT III/300 V CAT IV)
Storage altitude	12,000m
Enclosure	IP50 in accordance with EN60529
Vibration	MIL-T-28800E, Type 3, Class III, Style B
Safety	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-inch active matrix TFT, 480 pixels x 272 pixels, resistive touch panel
Warranty	Instrument and power supply: Two-years (battery not included)
	Accessories: one-year
	Calibration cycle: two-years
Dimensions	Instrument: 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)
Weight	Instrument: 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 to 150 A ac/10 to 1500 A ac
Nondestructive current	100 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 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)
Weight	115 g
Probe cable material	TPR
Coupling material	POM + ABS/PC
Output cable	TPR/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, operating	15% to 85% non-condensing
IP rating	IEC 60529:IP50
Warranty	One-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)
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)
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
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)
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)
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
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