Fluke 1738 Three-Phase Advanced Power Logger

Powerful and highly reliable, the Fluke 1738 is an advanced power logger ideal for use in load studies, energy assessments, harmonic measurements, voltage and current event capturing and all other power quality applications.

The upgraded, advanced version of Fluke's 1736 power logger, the 1738 includes additional functions. The main inclusions are a PQ health (EN50160) analysis function, support for Fluke Connect optional modules and WiFi download of testing data.

When evaluating power quality, the 1738 proves its worth almost immediately. It'll automatically capture and log over 500 power quality parameters, allowing you to gain a detailed snapshot into where you're losing power and improvements can be made. Everything can be captured, including dips, swells and inrush currents alongside time and date-stamped data for easier referencing.

Thanks to an improved and optimised user interface, the 1738 is much easier to set up than other analysers. Quick, guided graphical setup screens will guide you through making connections, with intelligent verification ensuring that everything is connected up right before testing proceeds. A bright, full-colour touch screen makes it easy to switch through modes and interact with testing data as and when needed.

The Fluke 1738 also has the highest safety rating in the industry: CAT IV 600V and CAT III 1000V for use everywhere from service entrances and beyond.

Optional Fluke Premium Care - 1 Year (UK Only)

Accidental damage and repair costs included
Expedited calibration and repair
Annual tool inspection, calibration, and updating
Replacement of damaged accessories (Some limitations apply, see Fluke Terms and Conditions)

Select the Premium Care option in the dropdown box when choosing the model you wish to purchase, only available for users in the UK. Please visit our Blog for more information.

Key Features

Automatically capture and log voltage, current, power, harmonics and associated power quality values
Fluke Connect compatible - view data locally on the instrument via Fluke Connect mobile app and desktop software
Power the instrument directly from the circuit being measured
CAT IV 600V and CAT III 1000V safety rated
Measure all three phases and neutral using the current probes (not included in /B kit)
More than 20 separate logging sessions can be stored directly on the instrument
Capture dips, swells and inrush currents - includes event waveform snapshots and high resolution RMS profile alongside date, time stamp and severity
Power Quality Health Summary function - summarises most important parameters to provide faster insight into what's causing problems
Bright, large-size full colour touchscreen
Optimised user interface with quick, guided graphical setup and verify correct connections with the intelligent verification function
Complete, in-the-field- setup through the front panel or Fluke Connect app - no need to return to workshop to download
Connect other Fluke Connect devices to the 1738 to simultaneously log up to two other measurement parameters
Energy Analyse Plus application software - download and analyse every detail of energy consumption and power quality state of health
Optional 1-Year Premium Care (UK Only)

What's Included?

	Fluke 1738/B	Fluke 1738/EUS	Fluke 1738/INTL
Fluke 1738 Three-Phase Advanced Power Logger	✔	✔	✔
Optional 1-Year Premium Care (UK Only)	-	✔	-
Power Supply	✔	✔	-
Voltage Test Leads	✔	✔	✔
4x Alligator Clips	✔	✔	✔
Soft Case	✔	✔	✔
Energy Analyse Plus Software	✔	✔	✔
Magnetic Hanging Strap	✔	✔	-
4x Magnetic Voltage Probes	✔	✔	-
Line Cords	✔	✔	✔
Colour Coding Set	✔	✔	✔
WiFi/BLE Adapter	-	✔	-
4x 12-inch 1500A Flexible Current Probe	-	✔	✔

Offers

FREE Powerbank / Wireless Charger

PASS Power Bank & Magnetic Wireless Charger (10 000mAh 15W) - PASSPOWER-PLUS, typically £49.00

Tech Specs

Fluke 1738 Technical Specifications

Accuracy
Parameter		Range	Max Resolution	Intrinsic Accuracy At Reference Conditions (% of reading + % of full scale)
Voltage		1000V	0.1V	±(0.2% + 0.01%)
Current	i17xx-flex 1500 12"	150A 1500A	0.1A 1A	±(1% + 0.02%) ±(1% + 0.02%)
	i17xx-flex 3000 24"	300A 3000A	1A 10A	±(1% + 0.03%) ±(1% + 0.03%)
	i17xx-flex 6000 36"	600A 6000A	1A 10A	±(1.5% + 0.03%) ±(1.5% + 0.03%)
	i40s-EL clamp	4A 40A	1mA 10mA	±(0.7% + 0.02%) ±(0.7% + 0.02%)
Frequency		42.5Hz to 69Hz	0.01Hz	±(0.1%)
Aux Input		±10V DC	0.1mV	±(0.2% + 0.02%)
Voltage Min/Max		1000V	0.1V	±(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		1000V	0.1V	≥10V: ±5% of reading <10V: ±0.5V
Current Harmonics - 2nd to 50th		Defined by accessory	Defined by accessory	≥3% of current range: ±5% of reading <3% of current range: ±0.1% of range
Unbalance		100%	0.1%	±0.2

Intrinsic Uncertainty ± (% of reading + % of range)¹
Parameter	Influence Quantity	iFlex 1500-12 150A/1500A	iFlex 3000-24 300A/3000A	iFlex 6000-36 600/600A	i40s-EL 4A/40A
Active Power Active Energy	PF ≥ 0.99	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Apparent Power Apparent Energy	0 ≤ PF ≤ 1	1.2% + 0.005%	1.2% + 0.0075%	1.7% + 0.0075%	1.2% + 0.005%
Reactive Power Reactive Energy	0 ≤ PF ≤ 1	2.5% of measured apparent power
Power Factor Displacement Power Factor	-	-	±0.025
Additional Uncertainly In % of Range	V P-N > 250V	0.015%	0.0225%	0.0225%	0.015%

¹Range = 1000V x Irange

Environmental Specifications
Electrical Specifications
Power Supply
Voltage Range	100V to 500V using safety plug input when powering from the measurement circuit
Voltage Range	100V to 240V using standard power cord (IEC 60320 C7)
Power Consumption	Maximum 50VA (max 15VA when powered using IEC 60320 input)
Efficiency	≥68.2% (in accordance with energy efficiency regulations)
Maximum No-Load Consumption	<0.3W only when powered using IEC 60320 input
Mains Power Frequency	50/60Hz ± 15%
Battery	Li-Ion 3.7V, 9.25Wh, customer-replaceable
On-Battery Runtime	4 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	10.24kHz at 50/60Hz, synchronised to mains frequency
Input Signal Frequency	50/60Hz (42.5 to 69Hz)
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 events
Basic Interval
Measurement 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, 30sec, 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
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 Parameters	Voltage, frequency, unbalance, voltage harmonics, THD V, current, harmonics, THD A, TDD
Averaging Interval	10 min
Individual Harmonics	2nd to 50th
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 (Urms 1/2 according to IEC61000-4-30) Waveform of voltage and current
Standard 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	IEE 1459
Power Quality Compliance	EN50160 (for measured parameters)
Interfaces
USB-A	File transfer via USB flash drive, firmware updates, max. supply current: 120mA
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	10MΩ
Bandwidth	42.5Hz to 3.5kHz
Scaling	1:1 and variable
Measurement Category	1000V CAT III/600V CAT IV
Current Inputs
Number of Inputs	4, mode selected automatically for attached sensor
Input Voltage	Clamp input: 500mV rms/50mV rms; CF 2.8
Rogowski Coil Input	150mV rms / 15V mV rms at 50Hz 180mV rms / 18mV rms at 60Hz 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	42.5Hz to 3.5kHz
Scaling	1:1 and variable
Auxiliary Inputs
Number of Inputs	2
Input Range	0 to ±10V DC, 1 reading/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
Operating Temperature	-10 to 50°C (14 to 122°F)
Storage Temperature	-20 to 60°C (-4 to 140°F With battery: -20 to 50°C (-4 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	2000m (up to 4000m derate to 1000V CAT II/600V CAT III/300V CAT IV
Storage Altitude	12000m
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
Safety	IEC 61010-2-031: CAT IV 600 V / CAT III 1000 V
Electromagnetic Compatibility (EMC)	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
Colour LCD Display	4.3" active matrix TFT 480 x 272 pixels Resistive touch panel
Warranty	Instrument and power supply: 2 years (battery not included) Accessories: 1 year Calibration Cycle: 2 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