Description

The Fluke 438-II is a powerful tool for technicians and engineers who need to analyze power quality and motor performance. With its advanced drive measurement capabilities, it can accurately measure variable speed drives and provide detailed information on motor efficiency, torque, and rpm.

Whether you’re working on a complex industrial project or troubleshooting a motor issue, the Fluke 438-II is the perfect solution. Its user-friendly interface and comprehensive features make it easy to use and understand, even for those without extensive technical knowledge.

Fluke 438-II Key Features

The Fluke 438-II offers a range of key features that make it an essential tool for any technician or engineer. These include:

Drive Measurement Details: Variable speed drive technology covered by the 438-II, including V/f control, open-loop vector, and closed-loop vector drives.
Motor Measurement: Measurement of 3-phase asynchronous motors, including power, energy, harmonics, and flicker.
Power Quality Analysis: Analysis of power quality issues, including harmonics, flicker, and unbalance.
Motor Analysis: Analysis of motor performance, including efficiency, torque, and rpm.
NEMA and IEC Support: Support for NEMA and IEC motor design types, including A, B, C, D, and E, as well as IEC type H and N.

Who Needs the Fluke 438-II?

The Fluke 438-II is designed for technicians and engineers who need to analyze power quality and motor performance. Whether you’re working on a complex industrial project or troubleshooting a motor issue, this tool is essential for anyone who needs to ensure optimal performance and efficiency.

With its advanced features and user-friendly interface, the Fluke 438-II is the perfect solution for anyone who needs to analyze power quality and motor performance. Whether you’re working in a factory, a power plant, or a research laboratory, this tool is designed to help you get the job done.

Fluke 438-II Applications

Industrial Motor Analysis: Use the Fluke 438-II to analyze the performance of industrial motors, including power, energy, and efficiency.
Power Quality Analysis: Use the Fluke 438-II to analyze power quality issues, including harmonics, flicker, and unbalance.
Variable Speed Drive Analysis: Use the Fluke 438-II to analyze the performance of variable speed drives, including V/f control, open-loop vector, and closed-loop vector drives.
Motor Design and Testing: Use the Fluke 438-II to design and test motors, including NEMA and IEC motor design types.
Research and Development: Use the Fluke 438-II to analyze power quality and motor performance in research and development applications.

Why Buy Fluke 438-II from Mohammad Mahdi Electronics?

At Mohammad Mahdi Electronics, we offer the Fluke 438-II at a competitive price, with fast shipping and excellent customer service. Our team of experts is always available to answer any questions you may have, and we offer a range of accessories and support services to ensure that you get the most out of your tool.

Fluke 438-II Specifications

Drive Measurement Details
Variable speed drive technology that is covered by the 438-II
Variable speed drive technology NOT covered by the 438-II
Mechanical specifications
Motor measurement
Product Specifications
Hz
Power
Energy
Harmonics
Flicker
Unbalance
Mains Signaling
General Specifications
Environmental
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	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%
Apk	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
Watts (VA, var)	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 »PDF
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