Fluke 438-II Power Quality and Motor Analyzer

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) standard, upto 32 GB 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

Drive Measurement

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

 

Variable speed drive technology that is covered by the 438-II

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.

 

Variable speed drive technology NOT covered by the 438-II

Inverter Type	CSI (current source inverter)
Motors type	Synchronous (DC, stepper, permanent magnet etc.)
Motor Frequency	<40 and >70 Hz

 

Motor measurement

	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

 

Product Specifications

Volt	Model	Measurement Range	Resolution	Accuracy
Vrms (AC + DC)		1 V to 1000 V phase to neutral	0.01 V	±0.1% of nominal voltage1
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

Amps (accuracy excluding clamp accuracy)

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

 

Hz

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

 

Power

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

 

Energy

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

 

Harmonics

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°

The ideal portable motor analysis test tool, the 438-II can help locate, predict, prevent, and troubleshoot power quality problems in three-phase and single-phase power distribution systems, while giving technicians the mechanical and electrical information they need to effectively evaluate motor performance.

• Measure key parameters like speed, torque and mechanical power without mechanical sensor all while the motor is in service simply by using three-phase input measurements
• Calculate Mechanical Power and Efficiency without the need of mechanical sensors
• Automatically calculate motor derating according to NEMA/IEC guidelines
• Measure electrical power parameters such as voltage, current, power, apparent power, power factor, harmonic distortion and unbalance to identify characteristics that impact motor efficiency
• PowerWave data technology captures fast RMS data, and shows half-cycle averages and waveforms to characterize electrical system dynamics (generator start-ups, UPS switching etc.)
• Identify power quality issues such as dips, swells, transients, harmonics and unbalance
• Waveform capture function captures 100/120 cycles (50/60 Hz) of each event detected event, in all modes, without set-up
• Automatic transient mode captures waveform data at 200 kS/s on all phases simultaneously up to 6 kV
• Fluke Connect® compatible* – view data locally on the instrument, via Fluke Connect mobile app and PowerLog 430-II desktop software
• Highest safety rating in the industry: 600 V CAT IV/1000 V CAT III rated for use at the service entrance.