IRRS-01-0028
FLUKE - Power Meter 438-II
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Ket features
• Measure key parameters on direct-on-line motors including torque, RPM, mechanical power and motor efficiency
• Perform dynamic motor analysis by plotting of motor de-rating factor against load according to NEMA 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 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.
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 |