Fluke 1750 Three-Phase
Power Quality Recorder

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Technical Specifications
Power quality measurement standards
Conformance	IEC 61999-1-4 Class 1, IEC 61000-4-30 Class A or B depending on measurement function, IEEE519, IEEE1159, IEEE1459
Clock/calendar	Leap years, 2 4-hour clock
Real-time clock accuracy	Not more than ± 1 s/day
Internal memory capacity for data	At least 1 GB
Maximum recording period	At least 31 days
Measurement time control	Automatic
Maximum number of events	Limited only by the size of the internal memory
Power requirements	100 to 2 40 V rms ± 10 %, 47-63 Hz, 40 W
Operating time during interruptions (internal UPS operation)	5 minutes per interruption, 60 minutes total operating time without recharging
Dimensions	215 mm x 310 mm x 35 mm (8.5 in x 12.2 in x 3.5 in)
Mass (weight)	6.3 kg (14 lb)
Input
Measurement types	One Phase Plus Neutral, One Phase IT No Neutral, One Phase Split Phase, Three Phase Wye, Three Phase Delta, Three Phase IT, Three Phase High Leg, Three Phase Open Leg, 2 Element Delta, 21/2 Element Wye
Input channels	Voltage: 4 channels, ac/dc Current: 5 channels
Voltage channels	Input resistance: 2 MΩ Input capacitance: < 2 0 pF
Current input characteristics	2 V rms = full scale, 1 MΩ Input Impedance for ferro CTs, low impedance for Flexi-CTs
Measuring method	Simultaneous digital sampling of voltage and current. Digital PLL synchronized sampling, internal frequency reference used during voltage drops.
Synchronization and sampling
PLL-synchronization source	The PLL synchronizes to the A-N voltage for wye power types, and to the A-B voltage for delta power types. All listed power types can be characterized as either wye or delta.
PLL lock range	42.5 to 69 Hz
Sampling frequency	Voltage and current: 2 56 samples/cycle Inter-harmonics per IEC 61000-4-7: 2 560 points/10 cycles (50 Hz), 3072 points/12 cycles (60 Hz) Transient Voltage: 5 MHz
A/D resolution	Voltage and current: 2 4 bits Transient voltage: 14 bits
Voltage and current measurements
Voltage measurement range	AC voltage: 1000 V rms ± 10 % over range DC voltage: ± 1000 V + 10 % over range
Voltage crest factor	3 or less
Current measurement range	Depends on current probe used
Current crest factor	4 or less
RMS voltage
Measurement type	True rms calculated continuously: every cycle, every 1/2 cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by IEC 61000-4-30.
Measurement uncertainty	AC: ± 0.2 % reading ± 0.1 % full scale, above 50 V rms DC: ± 0.5 % reading ± 0.2 % full scale, above 50 V dc
RMS current
Measurement type	True rms calculated continuously: every cycle, every 1/2 cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by standards
Transient voltage (impulse)
Measurement type	Waveshape sampling
Full scale	8000 V pk
Sample resolution	200 nS
Measurement uncertainty	± 5 % reading ± 2 0 V (test parameters: 1000 V dc, 1000 V rms, 100 kHz)
Voltage swell (rms swell)
Measurement type	True rms (one cycle calculation by overlapping each half cycle - voltage between lines is measured for 3P3W lines and phase voltage is measured for 3P4W lines)
Displayed data	Amplitude and duration of swell
Measurement	Same as rms voltage
Voltage dip (rms sag)
Measurement type	True rms (one cycle calculation by overlapping each half cycle - voltage between lines is measured for 3P3W lines and phase voltage is measured for 3P4W lines)
Displayed data	Amplitude and duration of dip or interruption
Measurement	Same as rms voltage
Voltage dropout (interruption)
Measurement type	Same as voltage dip
LAN interface
Connector	RJ-45
Speed and type	10/100 Base-T, auto MDIX
Communications protocol	TCP/IP over Ethernet
Wireless controller interface
Connection	wireless (2.4 GHz radio)
Speed	up to 700 kbit/second
Communications protocol	Bluetooth SPP

Power Measurements
Power
Measurement type	True rms calculated continuously: every cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by standards
Frequency
Measurement range	42.5 to 69 Hz
Measurement source	Same as PLL synchronization source
Measurement accuracy	± 10 mHz (10 to 110 % of range, with sine wave)
Power Factor
Measurement range	0.000 to 1.000
Measurement accuracy	± 1 digit from the calculation of each measured value (±3 digits for total)
Displacement power factor
Measurement method	Calculated from the phase difference between voltage fundamental and current fundamental
Measurement range	- 1.000 (leading) to + 1.000 (lagging)
Measurement accuracy	± 0.5 % reading ± 2 % full scale ± 1 digit
Voltage unbalance and phase sequence
Measurement method	Positive sequence voltage divided by negative sequence voltage, per IEC 61000-4-30
Harmonic voltage and current
Analysis window	rectangular
Analysis order	1st to 50th order
Measurement accuracy	Voltage / Current: 1st to 2 0th orders: ± 0.5 % reading ± 0.2 % full scale, 2 1st to 50th orders: ± 1 % reading ± 0.3 % full scale (current sensor accuracy must be included for current and power)
Measurement method	IEC 61000-4-7
Inter-harmonic voltage and current (intermediate harmonics)
Analysis window	rectangular
Analysis orders	1.5 to 49.5th order
Measurement method	IEC 61000-4-7

Environmental Specifications
Environmental
Operating environment	Indoors or in covered area outdoors, up to 2 000 m altitude
Storage temperature and humidity	-20 °C to 50 °C, 80 % RH max, non-condensing
Operating temperature and humidity	0 °C to 40 °C, 80 % RH max, non-condensing
Maximum rated working voltage
Voltage terminals	1100 V rms
Voltage durability	5550 V rms ac for 1 minute, between voltage input terminals, voltage input terminals and current probes, and voltage input terminals and case (50/60 Hz, 1 mA sense current)
Enclosure protection	IP30 (per EN 60529)
Standards:
EMC	EN 61326-1:1997+A1:1998 Class A EN 61000-3-2:1995+A1:1998+A2:1998 EN 61000-3-3:1995
Safety	EN 61010-1 2 nd Edition; 2 000 Voltage input unit: Contamination Level 2 , Overvoltage Category 1000 V CAT III, 600 V CAT IV (anticipated overvoltage: 8000 V)

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