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Fluke 438-II Power Quality and Motor Analyzer

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Fluke 438-II Power Quality and Motor Analyzer
Fluke 438-II Power Quality and Motor Analyzer
Fluke 438-II Power Quality and Motor Analyzer NEMA derating screen
Fluke 438-II Power Quality and Motor Analyzer measuring mechanical output power, torque and speed
Fluke 438-II Power Quality and Motor Analyzer with Fluke Connect mobile app compatibility

Quickly and easily discover electrical and mechanical performance of electric motors, and evaluate power quality with a single test tool

The Fluke 438-II Power Quality and Motor Analyzer adds key mechanical measurement capabilities for electric motors to the advanced power quality analysis functions of the Fluke 430 Series II Power Quality Analyzers. Quickly and easily measure and analyze key electrical and mechanical performance parameters such as power, harmonics, unbalance, motor speed, torque and mechanical power without the need of mechanical sensors. Fluke 434-II, 435-II and 437-II Power Quality Analyzer users can add motor analysis capabilities to their existing units with the Fluke-438-II/MA Motor Analyzer upgrade kit.

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 on direct-on-line motors and motors driven by specific variable frequency drive systems including torque, RPM, mechanical power and motor efficiency
  • Perform dynamic motor analysis by plotting of motor derating factor against load according to NEMA/IEC guidelines
  • Calculate mechanical power and efficiency without the need of mechanical sensors, just connect to the input conductors and you're ready to go
  • Measure electrical power parameters such as voltage, current, power, apparent power, power factor, harmonic distortion and unbalance to identify characteristics that impact motor efficiency
  • Identify power quality issues such as dips, swells, transients, harmonics and unbalance
  • 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.)
  • Waveform capture function captures 100/120 cycles (50/60 Hz) of each event detected, 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
  • Safety rated for industrial applications 600 V CAT IV/1000 V CAT III rated for use at the service entrance and downstream

 

Fluke 438-II mechanical metering functions

Motor torque
Calculates the amount of rotational force (displayed in lb.ft or Nm) developed by a motor and transmitted to a driven mechanical load. The motor torque is the single most critical variable that characterizes the instantaneous mechanical performance of rotating equipment driven by electric motors.

Motor speed
Provides the instantaneous motor shaft rotational speed. Combined with the motor torque, motor speed provides a snapshot of the mechanical performance of rotating equipment driven by electric motors.

Motor mechanical load
Measures the actual mechanical power (displayed in hp or kW) produced by motors and provides a direct link to overloading conditions without simply basing it on the motor current.

Motor efficiency
Shows the effectiveness of each motor within a machine, assembly line, plant, and/or facility in converting electric power to useful mechanical work. By properly aggregating the efficiencies of a population of motors the total (aggregate) efficiency can be estimated. Comparisons to expected motor efficiencies at observed operating conditions can help quantify the cost associated with motor energy inefficiency.

How it works
Using proprietary algorithms, the Fluke 438-II Power Quality and Motor Analyzer uses three-phase current and voltage waveforms to calculate motor torque, speed, load and efficiency at a 1 second update rate. The motor air gap field, as observed via the voltage/current waveforms, provides the basis for the measurements. Mechanical sensors and intrusive no-load motor testing are not required, making it faster than ever to analyze overall electric motor performance.

Motor Types
The Fluke 438-II can analyze both direct-on-line motors and motors powered by variable frequency drive (VFD) systems. The VFD must be a voltage controlled system (VSI) with a voltage / frequency range of 40 to 70Hz, and a carrier range of 2.5kHz to 20kHz.

Electrical motor analysis

The Fluke 438-II provides a complete breakdown of electrical parameters. Prior to beginning motor analysis, it's recommended to make base line power quality measurements to assess the state of harmonics and unbalance on the electrical service output as these two properties can have a serious negative impact, on motor performance.

When in Motor Analysis mode, results are summarized for electrical performance, mechanical performance and derating (according to NEMA recommendations).

The easy to understand four-level color severity scale indicates motor performance in relation to the recommended electrical parameter levels including rated power, power factor, unbalance and harmonics.

screen view motor analyzer electrical

For mechanical power you can instantly view the mechanical output power along with motor torque and speed. The mechanical output power is instantly compared with electrical power to provide you with live efficiency measurements. With this feature you can easily measure machine performance during each operation cycle.

screen view motor analyzer mechanical

The NEMA derating screen is updated as the load and the electrical conditions change, and each new measurement is plotted on the tolerance graph as a "+". In this example we can see that motor is within tolerance but is close to the service factor. This indicates that there may be a need for power quality mitigation, motor maintenance or some other performance improving adjustment. By frequently performing these tests over time, known benchmarks and performance trends can be created, enabling informed maintenance investment decisions.

screen view motor NEMA derating

Drive Measurement Details
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 Non-synchronous (DC, stepper, permanent magnet etc.)
Motor Frequency <40 and >70 Hz
Mechanical specifications
Mechanical measurements can be performed on direct online motors with a 3 wire connection.
  Range Resolution Accuracy Default limit
Motor measurement
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 ±1.5% 0.15
Unbalance Derating*
Factor
0.7 to 1.0 indicative NA
Harmonics Derating*
Factor
0.7 to 1.0 indicative NA
Total NEMA Derating*
Factor
0.5 to 1.0 indicative NA
* Derating factors do not apply to motors powered by variable frequency drives.
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
Electrical specifications
  Model Measurement range Resolution Accuracy
Volt
Vrms (ac+dc) 435-II 1 V to 1000 V phase to neutral 0.01 V ±0.1% of nominal voltage**** 
Vpk 1 Vpk to 1400 Vpk 1 V 5% of nominal voltage
Voltage Crest Factor (CF) 1.0 > 2.8 0.01 ±5%
Vrms½ 435-II 0.1 V ±0.2% of nominal voltage
Vfund 435-II 0.1 V ±0.1% of nominal voltage
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  1A  ±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 1A ±0.5% ±5 counts
1mV/A 10x  0.5 A A to 200 A (ac only) 0.1 A ±0.5% ±5 counts
Hertz
Hz Fluke 435 @ 50 Hz nominal 42.500 Hz to 57.500 Hz 0.001 Hz ±0.01 Hz
Fluke 435 @ 60 Hz nominal  51.000 Hz to 69.000 Hz 0.001 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% *
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° ±n x 1°
Flicker
Plt, Pst, Pst(1min) Pinst 0.00 to 20.00 0.01 ±5%
Unbalance
Volts % 0.0% to 20.0% 0.1% ±0.1%
Amps % 0.0% to 20.0% 0.1% ±1%
Mains signaling
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
General specifications
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 mm 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 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
Environmental
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

* ±5% if ≥ 1 % of nominal voltage ±0.05% of nominal voltage if < 1% of nominal voltage
** 50Hz/60Hz nominal frequency according to IEC 61000-4-30
*** 400Hz measurements are not supported for Flicker, Mains Signaling and Monitor Mode.
**** for nominal voltage 50 V to 500 V.

Model NameDescription
Fluke-438-IIThree-phase power quality and motor analyzer
Includes:
  • Test lead set
  • i430 Thin flexible current probes (4)
  • Battery
  • Power adapter
  • Combination WiFi/SD card
  • Soft carry case
  • CD Rom with PowerLog 430-II software and user documentation
Fluke-438-II/BasicThree-phase power quality and motor analyzer without current flexis (excludes FC WiFi SD card)
Includes:
  • Test lead set
  • Battery
  • Power adapter
  • 8GB SD card
  • Soft carry case
  • CD Rom with PowerLog 430-II software and user documentation
Fluke-438-II/INTLThree-phase power quality and motor analyzer, international version (excludes FC WiFi SD card)
Includes:
  • Test lead set
  • i430 Thin flexible current probes (4)
  • Battery
  • Power adapter
  • 8GB SD card
  • Soft carry case
  • CD Rom with PowerLog 430-II software and user documentation
Fluke-438-II/MA430-II motor analyzer upgrade kit
Includes:
  • Firmware upgrade package to add motor analysis capabilties to existing Fluke 434, 435 and 437 Series II Power Quality Analyzers

Cables and Hardware
GPS430GPS430 Time Synchronization Module

Clips
AC285AC285 SureGrip™ Alligator Clips

Batteries, Chargers and Adapters
BP2902400 mAh Li-ion battery for Fluke 190 Series II
BP2914800 mAh High capacity Li-ion battery ) for Fluke 190-seriesII
BC430BC430 Line Voltage Adapter/Battery Charger
EBC290External Battery Charger for charging BP290 or BP291 outside the instrument

Cases and Holsters
C435C435 Hard Rolling Case

Current-Clamps
90i-610s90i-610s 1A to 600A AC/DC Current Probe
i30sFluke i30s AC/DC Current Clamp
i400si400s AC Current Clamp
i5sPQ3i5sPQ3, 5 A ac Current Clamps, 3-pack
i1000si1000s AC Current Probe
i3000si3000s AC Current Clamp

Options
HH290Hanging Hook for ScopeMeter 190-Series II

PC Adapter and Software
FLK-FC-SD CARDFluke Connect Wireless SD Card

Test Leads
TLS430Fluke TLS430 – Test Leads and Alligator Clips (4 black, 1 green)
WC100WC100 Color Localization Set

*Not all models are available in all countries. Check with your local Fluke representative.

        
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