Fluke 1738/INTL

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

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

Wireless Connection

Number of inputs

2

Supported modules

Fluke Connect® 3000 series

Acquisition

1 reading/s

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

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)

Standards Compliance

Harmonics

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)

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

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

Interfaces

USB-A

File transfer via USB flash drive, firmware updatesMax. 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

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

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 61010-2-031: CAT IV 600 V / CAT III 1000 V

Electromagnetic compatibility

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

Power Supply

Voltage range

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

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

Waveform of voltage and current (1738)

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

General Specifications

Color LCD display

4.3-inch active matrix TFT, 480 pixels x 272 pixels, resistive touch panel

Warranty

One-year

Dimensions

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

115 g

Tamper protection

Kensington lock slot

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)

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

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