Test Point Subgroup Reading 1 Reading 2 Reading 3 Reading 4
Motor Driver Input
Voltage and Current
Phase - Phase V-A-Hz V ac+dc A ac+dc Hz
V peak V peak max V peak min V pk-to-pk Peak Coefficient
A peak A peak max A peak min A pk-to-pk Peak Coefficient
Phase - Ground V-A-Hz V ac+dc A ac+dc Hz
V peak V peak max V peak min V pk-to-pk Peak Coefficient
A peak A peak max A peak min A pk-to-pk Peak Coefficient
Voltage Imbalance Imbalance V ac+dc V ac+dc V ac+dc Imbalance
Peak V pk-to-pk V pk-to-pk V pk-to-pk
Current Imbalance Imbalance A ac+dc A ac+dc A ac+dc Imbalance
Fluke MDA-550 Series III Motor Drive Analyzer for Variable Frequency Drive Testing
Peak A pk-to-pk A pk-to-pk A pk-to-pk
Motor Driver DC Bus
DC V dc V pk-to-pk V peak max
Ripple V ac V pk-to-pk Hz
Motor Driver Output
Voltage and Current (Filtered) V-A-Hz V PWM A ac+dc Hz V/Hz
V peak V peak max V peak min V pk-to-pk Peak Factor
A peak A peak max A peak min A pk-to-pk Peak Factor
Voltage Imbalance Imbalance V PWM V PWM V PWM Imbalance
Peak V pk-to-pk V pk-to-pk V pk-to-pk
Current Imbalance Imbalance A ac+dc A ac+dc A ac+dc Imbalance
Peak A pk-to-pk A pk-to-pk A pk-to-pk Voltage Modulation
Phase-Phase Scaling 1 V PWM V pk-to-pk Hz V/Hz
Scaling 2 V peak max V peak min Voltage Increment
Peak Scaling 3 V peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Phase-Ground Scaling 1 V PWM V pk-to-pk V peak max V peak min
Scaling 2 V Peak max V peak min Voltage Increment Hz
Peak Scaling 3 V Peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Phase-DC + Scaling 1 V PWM V pk-to-pk V Peak max V peak min
Scaling 2 V peak max V peak min Voltage Increment Hz
Peak Scaling 3 V peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Phase-DC - Scaling 1 V PWM V pk-to-pk V peak max V peak min
Scaling 2 V peak max V peak min Voltage Increment Hz
Peak Scaling 3 V peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Motor Input
Voltage and Current (Filtered) V-A-Hz V PWM A ac+dc Hz V/Hz
V peak V peak max V peak min V pk-to-pk Peak Factor
A peak A peak max A peak min A pk-to-pk Peak Factor
Voltage Imbalance Imbalance V PWM V PWM V PWM Imbalance
Peak V pk-to-pk V pk-to-pk V pk-to-pk
Current Imbalance Imbalance A ac+dc A ac+dc A ac+dc Imbalance
Peak A pk-to-pk A pk-to-pk A pk-to-pk
Voltage Modulation
Phase - Phase Scaling 1 V PWM V pk-to-pk Hz V/Hz
Scaling 2 V peak max V peak min Voltage Increment
Peak Scaling 3 V peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Phase - Ground Scaling 1 V PWM V pk-to-pk V peak max V peak min
Scaling 2 V peak max V peak min Voltage Increment Hz
Peak Scaling 3 V peak max Voltage Increment/sec Peak Rise Time Overshoot
Scaling 3 Levels Voltage Increment Voltage Increment/sec Rise Time Level Overshoot
Motor Shaft
Shaft Voltage Event Off V pk-to-pk
Event On Voltage Increment Rise/Fall Time Voltage Increment/sec Event/sec
Motor Driver Inputs, Outputs, and Motor Inputs
Harmonics Voltage V ac V fundamental Hz fundamental % THD
Current A ac A fundamental Hz fundamental THD/TDD Percentage
Measurement Function Specifications
DC Voltage (V dc)
Maximum Voltage, 10:1 or 100:1 Probe 1000 V
Maximum Resolution (Ground Voltage) with 10:1 or 100:1 Probe 1mV/10mV
Full Scale Reading 999 Counts
Accuracy from 4 s to 10 us/div ± (1.5% + 6 counts)
True RMS Voltage (V ac or V ac + dc) (when DC Coupling Function Selected)
Maximum Voltage (Ground Voltage) with 10:1 or 100:1 Probe 1000 V
Maximum Resolution (Ground Voltage) with 10:1 or 100:1 Probe 1 mV/10 mV
Full Scale Reading 999 Counts
DC to 60 Hz ± (1.5% + 10 mV) (Counts)
60 Hz to 20 kHz ± (2.5% + 15 counts)
20 kHz to 1 MHz ± (5% + 20 counts)
1 MHz to 25 MHz ± (10% + 20 counts)
Pulse Width Modulation Voltage (Vpwm)
Applications: Measuring pulse width modulated signals, such as motor driver inverter output signals.
Principle: The reading displays the effective voltage obtained based on the average of the sampled values over the entire cycle of the fundamental frequency.
Accuracy: Same as Vac+dc for sinusoidal signals.
Peak Voltage (Vpeak)
Modes: Maximum peak, minimum peak, or interpeak
Maximum voltage (ground voltage) using a 10:1 or 100:1 probe: 1000 V
Maximum resolution using a 10:1 or 100:1 probe: 10 mV
General Information: IEC 61010-1: Pollution Degree 2
Measurement: Measurement Standard: IEC 61010-2-030: CAT IV 600 V/CAT III 1000 V
Maximum voltage between any terminal and ground: 1000 V
Maximum input voltage via VPS410-II or VPS421: 1000 V CAT III/600 V CAT IV
BNC input A, B, C, D directly: 300 V CAT IV
Maximum floating voltage, using a test tool or a test tool with VPS410-II/VPS421 voltage probes: 1000 V CAT III/600 V CAT IV from any terminal to ground; 1000 V CAT III/600 V CAT IV between any terminals
Operating voltage between probe tip and probe reference lead: VPS410-II: 1000 V