Fluke 438-II Power Quality Analyzer & Motor Analyzer
$ 7430
$ 14999
📦 Product Description: Fluke 438-II Power Quality & Motor Analyzer
Unlock both electrical and mechanical insights with a single tool — the Fluke 438-II, an advanced Power Quality and Motor Analyzer that brings unmatched convenience and precision to motor diagnostics and energy assessments.
🔧 Key Features:
No Mechanical Sensors Needed: Measures motor speed, torque, and mechanical power using only voltage and current connections.
Complete Electrical Analysis: Captures voltage, current, power, power factor, harmonics, transients, dips, swells, and system unbalance.
Motor Efficiency Calculation: Calculates mechanical power and motor efficiency from motor nameplate data (NEMA/IEC).
PowerWave™ Data Capture: View system dynamics in real-time (e.g. UPS switching, generator startup).
Event Waveform Capture: Records 100/120 cycles of each electrical event across all phases.
Transient Recording: Captures events up to 6 kV, at 200 kS/s across all channels simultaneously.
Highest Safety Standards: Rated 1000 V CAT III / 600 V CAT IV for industrial and utility environments.
Upgradeable: Existing users of Fluke 434-II / 435-II / 437-II can add motor analysis features with upgrade kits.
🛠 Applications:
Diagnose both electrical faults and mechanical performance issues in motors
Evaluate motor efficiency and derating without invasive tools
Monitor power quality in industrial facilities and utilities
Ensure optimal energy usage and plan predictive maintenance
💡 Why Fluke 438-II?
It’s like having two analyzers in one — a complete power quality tool plus an advanced motor performance analyzer. Ideal for industrial engineers, electricians, and facility managers who need fast, non-invasive, and data-rich diagnostics.
Specifications: Fluke 438-II Power Quality Analyzer & Motor Analyzer
Amps (accuracy excluding clamp accuracy)
Drive Measurement DetailsVariable speed drive technology that is covered by the 438-IIVariable speed drive technology NOT covered by the 438-IIMechanical specificationsMotor measurementProduct SpecificationsHzPowerEnergyHarmonicsFlickerUnbalanceMains SignalingGeneral SpecificationsEnvironmental| Motor Type | 3 phase asynchronous (induction) | |||
| Power Source | Variable Frequency Drive | |||
| Motor Frequency Range | 40Hz to 70Hz | |||
| Over/Under Voltage from Nominal V/f Curve (%) | -15% to +15% | |||
| Carrier Frequency Range | 2.5kHz–20kHz | |||
| Inverter Type | VSI only (voltage controlled) * | |||
| Control Method | V/f control, open-loop vector, closed loop vector, drives with encoders. | |||
| Frequency | 40 to 70 Hz | |||
| * VSI drives are the most common drives. The alternative CSI drives are used in higher power applications. | ||||
| Inverter Type | CSI (current source inverter) | |||
| Motors type | Synchronous (DC, stepper, permanent magnet etc.) | |||
| Motor Frequency | <40 and >70 Hz | |||
| Mechanical measurements can be performed on direct online motors with a 3 wire connection. | ||||
| Range | Resolution | Accuracy | Default limit | |
| Mechanical motor Power | 0.7 kW to 746 kW 1 hp to 1000 hp | 0.1 kW 0.1 hp | ±3% 1 ±3% 1 | 100% = rated power 100% = rated power |
| Torque | 0 Nm to 10 000 Nm 0 lb ft to 10 000 lb ft | 0.1 Nm 0.1 lb ft | ±5% 1 ±5% 1 | 100% = rated torque 100% = rated torque |
| rpm | 0 rpm to 3600 rpm | 1 rpm | ±3% 1 | 100% = rated rpm |
| Efficiency | 0% to 100% | 0.10% | ±3% 1 | NA |
| Unbalance (NEMA) | 0% to 100% | 0.10% | ±0.15% | 5% |
| Harmonics Voltage Factor (NEMA) | 0 to 0.20 | 0.1 | ±1.5% | 0.15 |
| Unbalance Derating Factor | 0.7 to 1.0 | 0.1 | indicative | NA |
| Harmonics Derating Factor | 0.7 to 1.0 | 0.1 | indicative | NA |
| Total NEMA Derating Factor | 0.5 to 1.0 | 0.1 | indicative | NA |
| Notes: | Supports motor design types NEMA A, B, C, D & E and IEC type H and N. Rated torque is calculated from rated power and rated speed. Update rate of Motor Measurements is 1x per second. Default Trend duration is 1 week. | |||
| 1Add 5% error when selecting Motor design type Other Specification valid for Motor Power > 30% of rated power Specification valid at stable operating temperature. Run the motor for at least 1 hour at full load (2-3 hours if the motor is 50 HP or higher) to obtain stable temperature | ||||
| Volt | Model | Measurement Range | Resolution | Accuracy |
| Vrms (AC + DC) | 1 V to 1000 V phase to neutral | 0.01 V | ±0.1% of nominal voltage 1 | |
| Vpk | 1 Vpk to 1400 Vpk | 1 V | 5% of nominal voltage | |
| Voltage Crest Factor (CF) | 1.0 > 2.8 | 0.01 | ±5% | |
| Vrms½ | 0.1 V | ±0.2% of nominal voltage | ||
| Vfund | 0.1 V | ±0.1% of nominal voltage | ||
| Amps (AC + DC) | i430-Flex 1x | 5 A to 6000 A | 1 A | ±0.5% ±5 counts |
| i430-Flex 10x | 0.5 A to 600 A | 0.1 A | ±0.5% ±5 counts | |
| 1mV/A 1x | 5 A to 2000 A | 1A | ±0.5% ±5 counts | |
| 1mV/A 10x | 0.5 A A to 200 A (AC only) | 0.1 A | ±0.5% ±5 counts | |
| Apk | i430-Flex | 8400 Apk | 1 Arms | ±5% |
| 1mV/A | 5500 Apk | 1 Arms | ±5% | |
| A Crest Factor (CF) | 1 to 10 | 0.01 | ±5% | |
| Amps½ | i430-Flex 1x | 5 A to 6000 A | 1 A | ±1% ±10 counts |
| i430-Flex 10x | 0.5 A to 600 A | 0.1 A | ±1% ±10 counts | |
| 1mV/A 1x | 5 A to 2000 A | 1 A | ±1% ±10 counts | |
| 1mV/A 10x | 0.5 A A to 200 A (AC only) | 0.1 A | ±1% ±10 counts | |
| Afund | i430-Flex 1x | 5 A to 6000 A | 1 A | ±0.5% ±5 counts |
| i430-Flex 10x | 0.5 A to 600 A | 0.1 A | ±0.5% ±5 counts | |
| 1mV/A 1x | 5 A to 2000 A | 1 A | ±0.5% ±5 counts | |
| 1mV/A 10x | 0.5 A A to 200 A (AC only) | 0.1 A | ±0.5% ±5 counts | |
| Fluke 434 @ 50 Hz Nominal | 42.50 Hz to 57.50 Hz | 0.01 Hz | ±0.01 Hz | |
| Fluke 434 @ 60 Hz Nominal | 51.00 Hz to 69.00 Hz | 0.01 Hz | ±0.01 Hz | |
| Watts (VA, var) | i430-Flex | max 6000 MW | 0.1 W to 1 MW | ±1% ±10 counts |
| 1 mV/A | max 2000 MW | 0.1 W to 1 MW | ±1% ±10 counts | |
| Power Factor (Cos j/DPF) | 0 to 1 | 0.001 | ±0.1% @ nominal load conditions | |
| kWh (kVAh, kvarh) | i430-Flex 10x | Depends on clamp scaling and V nominal | ±1% ±10 counts | |
| Energy Loss | i430-Flex 10x | Depends on clamp scaling and V nominal | ±1% ±10 counts Excluding line resistance accuracy | |
| Harmonic Order (n) | DC, 1 to 50 Grouping: Harmonic groups according to IEC 61000-4-7 | |||
| Inter-Harmonic Order (n) | OFF, 1 to 50 Grouping: Harmonic and Interharmonic subgroups according to IEC 61000-4-7 | |||
| Volts % | f | 0.0% to 100% | 0.1% | ±0.1% ±n x 0.1% |
| r | 0.0% to 100% | 0.1% | ±0.1% ±n x 0.4% | |
| Absolute | 0.0 to 1000 V | 0.1 V | ±5% 1 | |
| THD | 0.0% to 100% | 0.1% | ±2.5% | |
| Amps % | f | 0.0% to 100% | 0.1% | ±0.1% ±n x 0.1% |
| r | 0.0% to 100% | 0.1% | ±0.1% ±n x 0.4% | |
| Absolute | 0.0 to 600 A | 0.1 A | ±5% ±5 counts | |
| THD | 0.0% to 100% | 0.1% | ±2.5% | |
| Watts % | f or r | 0.0% to 100% | 0.1% | ±n x 2% |
| Absolute | Depends on clamp scaling and V nominal | — | ±5% ±n x 2% ±10 counts | |
| THD | 0.0% to 100% | 0.1% | ±5% | |
| Phase Angle | -360° to +0° | 1° | ±n x 1° | |
| Plt, Pst, Pst (1 min) Pinst | 0.00 to 20.00 | 0.01 | ±5% | |
| Volts % | 0.0% to 20.0% | 0.1% | ±0.1% | |
| Amps % | 0.0% to 20.0% | 0.1% | ±1% | |
| Threshold Levels | Threshold, limits and signaling duration is programable for two signaling frequencies | — | — | |
| Signaling Frequency | 60 Hz to 3000 Hz | 0.1 Hz | ||
| Relative V % | 0% to 100% | 0.10% | ±0.4% | |
| Absolute V3s (3 second avg.) | 0.0 V to 1000 V | 0.1 V | ±5% of nominal voltage | |
| Case | Design Rugged, shock proof with integrated protective holster Drip and dust proof IP51 according to IEC60529 when used in tilt stand position Shock and vibration Shock 30 g, vibration: 3 g sinusoid, random 0.03 g 2 /Hz according to MIL-PRF-28800F Class 2 | |||
| Display | Brightness: 200 cd/m 2 typ. using power adapter, 90 cd/m 2 typical using battery power Size: 127 x 88 mm (153 mm/6.0 in diagonal) LCD Resolution: 320 x 240 pixels Contrast and brightness: user-adjustable, temperature compensated | |||
| Memory | 8GB SD card (SDHC compliant, FAT32 formatted), up to 32GB optionally. Screen save and multiple data memories for storing data including recordings (dependent on memory size). | |||
| Real-Time Clock | Time and date stamp for Trend mode, Transient display, System Monitor and event capture | |||
| Operating Temperature | 0°C ~ +40°C; +40°C ~ +50°C excl. battery | |||
| Storage Temperature | -20°C ~ +60°C | |||
| Humidity | +10°C ~ +30°C: 95% RH non-condensing +30°C ~ +40°C: 75% RH non-condensing +40°C ~ +50°C: 45% RH non-condensing | |||
| Maximum Operating Altitude | Up to 2,000 m (6666 ft) for CAT IV 600 V, CAT III 1000 V Up to 3,000 m (10,000 ft) for CAT III 600 V, CAT II 1000 V Maximum storage altitude 12 km (40,000 ft) | |||
| Electro-Magnetic-Compatibility (EMC) | EN 61326 (2005-12) for emission and immunity | |||
| Interfaces | Mini-USB-B, Isolated USB port for PC connectivity SD card slot accessible behind instrument battery | |||
| Warranty | Three years (parts and labor) on main instrument, one year on accessories | |||
| View full family specifications » | ||||
| 1. ±5% if ≥ 1% of nominal voltage ±0.05% of nominal voltage if < 1% of nominal voltage 2. 50Hz/60Hz nominal frequency according to IEC 61000-4-30 3. 400Hz measurements are not supported for Flicker, Mains Signaling and Monitor Mode 4. For nominal voltage 50 V to 500 V | ||||
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