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Fluke 1738 Three-Phase Advanced Power Logger
The Fluke 1738 is an advanced three-phase power quality and energy logger engineered to give facilities managers, plant engineers, and energy auditors the data needed to optimize system reliability and reduce energy costs. Automatically capturing and logging over 500 parameters, it features an EN50160 Power Quality Health Summary, event waveform captures, and Fluke Connect® wireless reporting.
Key Features
Equipped with 16-bit synchronous sampling at 10.24 kHz, the Fluke 1738/EUS delivers precise data acquisition synchronized to the mains frequency. It supports a wide range of circuit types including 1-phase, split phase, and three-phase configurations such as delta and wye, including IT systems. The logger captures individual harmonics from the 2nd to the 50th order and calculates total harmonic distortion on 50 harmonics. Additional features include built-in events recording for voltage dips, swells, and interruptions, as well as inrush current detection. The internal flash memory stores typical 10 logging sessions of 8 weeks with 1-minute intervals, providing extensive historical data for analysis.
- 16-bit synchronous sampling at 10.24 kHz
- Supports 1-phase to 3-phase Aron/Blondel configurations
- Measures harmonics up to 50th order
- IEC 61000-4-30 Class S compliance
- Records voltage events: dips, swells, interruptions
- Captures inrush current events
- Internal memory for 10 logging sessions of 8 weeks
- Synchronized to mains frequency 50/60 Hz
Description
Fluke 1738/EUS Applications
In manufacturing plants, the Fluke 1738/EUS monitors three-phase motor drives to detect harmonic distortion that can cause overheating and premature failure. Data centers rely on the logger to ensure power quality meets strict requirements for sensitive IT equipment, tracking voltage dips and swells that could disrupt operations. Renewable energy installations, such as solar PV systems, use the device to analyze grid interaction and power factor correction performance. Additionally, the logger is ideal for building energy management systems, providing the data needed to optimize consumption and reduce operational costs.
Specifications
| Specification Parameter | Value / Range |
| Brand / Manufacturer | Fluke Corporation |
| Model | Fluke 1738 / Fluke 1738/EUS (MME SKU: b0fc1fb4b143 / 1736-1738) |
| Supported Configurations | 1-φ, 1-φ IT, Split phase, 3-φ delta, 3-φ wye, 3-φ wye IT, 3-φ Aron/Blondel (2-element), 3-φ open leg |
| Voltage Inputs | 4 inputs (3 phases + neutral), 1000 V CAT III / 600 V CAT IV |
| Voltage Measurement Range | Up to 1000 Vrms (Accuracy: ±0.2% of nominal voltage) |
| Current Inputs | 4 inputs (3 phases + neutral); Mode selected automatically for attached sensor |
| Current Measurement Range | 1 A to 1500 A AC (with included i173X-flex1500); up to 6000 A with optional probes |
| Sampling Frequency | 10.24 kHz at 50/60 Hz (16-bit synchronous sampling) |
| Harmonics Measurement | Harmonic orders up to 50th order (THD V, THD A, TDD) to IEC 61000-4-7 Class 1 |
| Standards Compliance | IEC 61000-4-30 Class S, IEEE 519 (reporting via software) |
| Event Logging | Dips, swells, interruptions, inrush current with waveform capture |
| Internal Memory | Typical 10 logging sessions of 8 weeks with 1-minute intervals and 500 events |
| Display | 4.3-inch active matrix color TFT LCD (480 × 272 pixels) with resistive touch panel |
| Communication | WiFi, Bluetooth BLE (Fluke Connect), USB-A (flash drive), USB-mini (PC link) |
| Power Supply | 100 V to 500 V self-powering from test circuit or 100 V to 240 V mains cord |
| Battery Backup | Lithium-ion 3.7 V, 9.25 Wh; up to 5.5 hours runtime in power-saving mode |
| Dimensions & Weight | 19.8 × 16.7 × 9.0 cm (with power supply attached); Approx. 1.5 kg total |
| Included Accessories (EUS Kit) | Fluke 1738 Logger, 4× i173X-flex1500 Flexible Probes, 3PHVL-173 Flat Lead Set, Alligator Clips, WiFi/BLE Adapter, Soft Storage Case, Magnetic Hanger, Fluke Energy Analyze Plus Software |
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