Fluke 1744 Power Quality Logger

Fluke 1744 Three-Phase PQ Loggers Memobox is an everyday power meter for technicians who troubleshoot and analyze power quality issues.


Measurement of common power parameters with latest Fluke 1744 Power Quality Logger. Safe, Secure and reliable!

Fluke 1744 Three-Phase PQ Loggers Memobox is an everyday power meter for technicians who troubleshoot and analyze power quality issues.

The IP65 water-proof monitor is perfect for logging the most common power parameters including V, A, W, VA, VAR, PF, energy, flicker, voltage events, and THD. In addition, it measures voltage and current harmonics, interharmoincs, mains signaling, unbalances and frequency.

Capable of simultaneously logging up to 500 power parameters for up to 85 days and monitoring for events, this power logger helps uncover intermittent and hard-to-find power quality issues.

Perfect for disturbance analysis to uncover the root cause of equipment malfunction, to validate incoming power quality at the service entrance, assess baseline.

Power quality to validate compatibility with critical systems before installation, verify electrical system capacity before adding loads and energy and validate the performance of facility improvements by quantifying energy consumption, power factor, and general power quality before and after improvements.

Plug and play allow you to set-up in minutes with automatic current probe detection and powering.

Data can be downloaded during recording without interruption. Measures voltage with premium accuracy with the IEC61000-4-30 Class-A compliant voltage accuracy (0.1-Percent).

Includes 4 flexible probes with 2 m cable, CD-ROM with PQ Log software, RS232 interface cable and RS323-USB adapter, test leads for voltages and power supply, 4 black dolphin clips, color localization kit, carrying bag, test certificate with measurement values. manual and multi-language manual CD.

Fluke Corporation is the world leader in the manufacture, distribution and service of electronic test tools and software. From industrial electronic installation, maintenance and service, to calibration and quality control. Fluke tools help keep business and industry around the globe up and running.


  • Plug and play: Setup in minutes with automatic current probe detection and powering
  • Determines the root cause: Included PQ Log software quickly analyzes trends, creates statistical summaries, and generates detailed graphs and tables
  • Installs inside the cabinet: Compact, fully-insulated housing and accessories fit easily in tight spaces next to live power
  • Rugged and reliable: Designed for everyday field use with no moving parts and durable insulated case with two-year warranty
  • Monitors power for the long-term: Data can be downloaded during recording without interruption
  • Measure voltage with premium accuracy: IEC61000-4-30 Class-A compliant voltage accuracy (0.1%)
  • Quickly validate the quality of power: Assess power quality according to EN50160 power quality standard with a statistical overview
  • Stringent safety standards:  600 V CAT III and 300 V CAT IV environments.


General Data
Intrinsic error
Refers to the reference conditions and is guaranteed for two years
2 years
Recalibration interval
2 years recommended
Quality system
developed, designed, and manufactured according to DIN ISO 9001
Reference conditions
23 °C ± 2 K; 74 °F ± 2 K , Vm=230 V ± 10%, 50 Hz ± 0.1 Hz or 60 Hz ± 0.1 Hz
Phase sequence L1, L2, L3
Interval length 10 minutes
Wye connection (L1, L2, L3 to N)
Power supply 88 V … 265 V AC
Environment conditions
Working temp. range -10 °C to 55°C; 14 °F to 131°F
Operating temp. range 0 °C to 35°C; 32 °F to 95°F
Storage temp. range -20 °C to 60°C; -4 °F to 140°F
Reference temp. range 23 °C ± 2 K; 74 °F ± 2 K
Relative humidity Fluke 1745: Class B2 acc. IEC 60654-1
Fluke 1744/43: Class C2 acc. IEC 60654-1
robust, fully insulated housing and accessories
Protection type
Fluke 1745 IP50 as per EN 60529
Fluke 1744/1743 IP65 as per EN 60529
IEC/EN 61010-1 600 V CAT III, 300 V CAT IV, pollution degree 2, double insulation
Type test voltage
5.2 kV rms, 50 Hz / 60 Hz, 5 s
Emission IEC/EN 61326-1, EN55022
Immunity IEC/EN 61326-1
Voltage and Current Measurement
Input voltage
Input range VIP-N max 480 V AC
Input range VIP-P max 830 V AC
Max. overload voltage 1.2 VI
Input range selection By job programming
Connections P-P or P-N, 1- or 3-phase
Nominal voltage VN <= 999 kV with PTs and ratio
Input resistance App. 820 kΩ per chan. Lx-N Single phase (L1 or A, L2 or B, L3 or C connected): app. 300 kΩ
Intrinsic uncenrtainty 0.1 % of VI
Voltage transformer Ratio: <999 kV / VI
Ration selection By job programming
Current input with Flexi Set
Input ranges II L1 or A, L2 or B, L3 or C, N: 15 A / 150 A / 1500 A / 3000 A ac
Measuring range 0.75 A 3000 A ac
Intrinsic uncertainty < 2 % of II
Position influence Max. ± 2 % of measured value – for distance conductor to meas. head > 30 mm
Stray field influence < ± 2 A ac for Iext=500 A ac and distance to measuring head > 200 mm
Temperature coefficient < 0.05 % / K
Current transformer Ratio <= 999 kA / II
Ratio selection By job programming
Connection 3-phase, 3-phase +N, 2 phase L1 or A and L3 or C (2 W-meter-method) 7 pole connector
Current input for clamp
Input ranges II L1 or A,
L2 or B, L3 or C, N:
0.5 V nominal (for II) 1.4 Vpeak
Intrinsic uncertainty < 0.3 % of II
Max. overload 10 V ac
Input resistance App. 8.2 kΩ
Current transformer Ratio Ω 999 kA / II
Power systems
Delta, 2-Element Delta, Wye, Single Phase, Split Single Phase
Power supply
Functional Range 88 V to 660 V absolute, 50 Hz / 60 Hz
100 V to 350 V dc Internal fuse: 630 mA T
Power consumption 5 Watts
Ride through Fluke 1745: Internal battery for typ. > 5 hours ride through with intelligent power management
Fluke 1743/44: 3 sec Capacitor
Fuse Power supply fuse can be replaced in service facility only. Supply can be connected in parallel to measuring inputs (up to 660 V)
Display, indicators
LEDs for status and voltage levels
Fluke 1745: LC-display with backlight for voltage, current, active power, phase sequence.
Capacity 8 MB Flash-EPROM
Intervals A function > 12000 intervals for > 85 days with 10 min intervals
P function > 30000 intervals for > 212 days with 10 min intervals
Events > 13000
Memory model linear, circular
RS 232, 9600…115 000 Baud, automatic Baud rate selection, 3-wire communication
Fluke 1745 282 mm x 216 mm x 74 mm (115in x 88in x 33in)
Fluke 1743/1744 170 mm x 125 mm x 55 mm (69in x 51in x 22in)
Fluke 1745 approx. 3 kg
Fluke 1744/1743 approx. 2 kg
A/D converter 16 bit, sample rate: 10.24 kHz
Anti-aliasing filter FIR-Filter, fc =4.9 kHz
Frequency response Uncertainty < 1 % of Vm for 40 Hz to 2500 Hz
Interval length 1, 3, 5, 10, 30 s, 1, 5, 10, 15, 60 minutes
Averaging time for Min/max values ½, 1 mains period, 200 ms,1 , 3 , 5 s
Time base Resolution: 10 ms (at 50 Hz), deviation: 2s/day at 23 °C; 74 °F ± 2 K


  • Fluke 1744-BASIC Three Phase Power Quality Logger – Memobox


Fluke 1744 Power Quality Logger – Catalog    Download


Current clamps
I1A/10A Clamp PQ4 I1A/10A Clamp PQ4
I5A/50A Clamp PQ4 I5A/50A Clamp PQ4
Rack Mounts Hardware
1743/44 Poleset 1743/44 POLESET Mounting Kit for Fluke 1743/1744
Test Leads
VL1735/45 VL1735/45 Banana 4-Phase voltage lead set for Fluke 1735/45


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