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190 Series III

Users Manual

64

Current Unbalance

Current Unbalance checks for the difference between current levels of the phases for 3-phase 
systems. To calculate the unbalance value:

% unbalance = (maximum deviation from average / average of three phases) x 100 %

Tips:

Current unbalance should be <6 % and depends on load current and circuit capacity. 
Excessive current unbalance can point to or cause drive rectifier problems that result in the 
motor overheating. Current unbalance can be caused by voltage unbalance. For example, 
1 % of voltage unbalance can result in 3 % to 4 % of current unbalance. 

2

 changes the readings that are displayed in the top of the screen to the peak-peak 

values of each phase as well as the highest Crest Factor (ratio between peak and rms value) 
of one of the phases.

Harmonics

Harmonics are periodic distortions of the voltage and current sine wave. Harmonics occur when 
multiples of the fundamental waveform are superimposed over the fundamental. You can 
consider the signal as a combination of various sine waves with different frequencies. The 
contribution of each of these components to the full signal is shown as a bar. For example, a 5th 
harmonic is 300 Hz (5 x 60) for 60 Hz systems or 250 Hz (5 x 50) for 50 Hz systems. The effect of 
these harmonics is distortion of the voltage or current. The sum of all distortions from the 2

nd

 

harmonic to the 50

th

 harmonic divided by the fundamental component is expressed as the Total 

Harmonic Distortion (THD).

The readings in the top of the screen show the ac rms value of the signal, the fundamental (H1) 
value, the frequency of the fundamental and the THD value.

To view the reading for the harmonic component:

1. Select 

4

 

Harmonics

.

2. Push 

Input

 to select the channel for the harmonics display. 

For Voltage and Current measurements, select A for the Voltage harmonics on Channel A 
and select B for the Current harmonics on Channel B. 

For Unbalance measurements, select A, B, or C to show the voltage or current harmonics for 
the selected channel.

3. Push 

h

 to vertically zoom in on the harmonics display.

 

4. Push 

3

 

Scale Options

 to change the vertical scale. 

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Summary of Contents for 190-504

Page 1: ...02 504 MDA 550 III Users Manual August 2021 English 2021 Fluke Corporation All rights reserved Specifications are subject to change without notice All product names are trademarks of their respective...

Page 2: ...vice center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no...

Page 3: ...15 Average Persistence and Glitch Capture 15 Using Average for Smoothing Waveforms 15 Smart Average 16 Persistence Envelope and Dot Join to View Waveforms 16 Glitch Display 17 High Frequency Noise Su...

Page 4: ...ing to Start or Stop Scope Record 34 TrendPlot or Scope Record Analysis 35 Replay Zoom and Cursors 36 Replay the 100 Most Recent Scope Screens 36 Replay Step by Step 36 Replay Continuously 37 Turn Off...

Page 5: ...WiFi Connection 59 MDA 550 III Test Tool 60 Motor Drive Input 62 Voltage and Current 62 Voltage Unbalance 63 Current Unbalance 64 Harmonics 64 Motor Drive DC Bus 66 Voltage DC Level 66 Voltage AC Ripp...

Page 6: ...ck 83 Charging the Batteries 84 Battery Pack Replacement 85 Voltage Probe Calibration 87 Version and Calibration Information 88 Battery Information 89 Replacement Parts 89 Optional Accessories 90 Trou...

Page 7: ...nput banana jack 190 102 III Two 100 MHz Scope Inputs BNC one Meter Input banana jack 190 104 III Four 100 MHz Scope Inputs BNC 190 202 III Two 200 MHz Scope Inputs BNC one Meter Input banana jack 190...

Page 8: ...t setup Graphically shows how to connect and then automatically triggers according to the selected test procedure Reports Use for troubleshooting and collaborative work with others Additional electric...

Page 9: ...ged See Charging the Batteries Table 1 Test Tool Kit 190 III Models Item Description 190 062 III 190 102 III 190 104 III 190 202 III 190 204 III 190 502 III 190 504 III MDA 550 III Test Tool with Hand...

Page 10: ...PC connection USB A to mini USB B not shown Motor Drive Analyzer Accessories see Table 2 i400s Current Clamp 3 C437 II Protective Carry Case with rollers Safety Information FlukeView 2 Demo Software a...

Page 11: ...and perform basic operations Test Tool Power See Figure 1 to power the test tool from a standard ac outlet See Battery Life for instructions on using battery power Turn on the test tool with O The tes...

Page 12: ...ol Reset To reset the test tool to the factory settings 1 Turn the test tool off 2 Press and hold U 3 Press and release O The test tool turns on Wait to hear a double beep that indicates the reset is...

Page 13: ...ions menu The menu shows at the bottom of the screen Actual settings are shown on a yellow background Use the cursor to change the setting black background and confirm the selection with E See Figure...

Page 14: ...s are stopped the screen is frozen HOLD Off Measurements are running RUN A B C D On The range key the move up down key and the F1 4 key labels apply to the illuminated channel key s Off J On Manual op...

Page 15: ...benefit of independent isolated floating inputs and to avoid problems caused by improper use see Tips For an accurate indication of the measured signal you must match the probe to the input channel o...

Page 16: ...ground lead to ground 5 For the current measurement place the clamp around one phase and connect the current probe to input B After measurement selection an on screen connection diagram shows the conn...

Page 17: ...ension rod and magnetic base to keep the probe in a fixed position and the brush in good contact with the motor shaft Probe Type Setup To obtain correct measurement results the test tool probe type se...

Page 18: ...known signals automatically This function optimizes the position range time base and triggering and assures a stable display of virtually any waveform If the signal changes the setup is automatically...

Page 19: ...show the SCOPE key labels 2 Open the READING menu with 2 3 Select the reading number with 1 for example READING 1 4 Use the cursor and E to select on A Observe that the highlight jumps to the present...

Page 20: ...ination is off Average Persistence and Glitch Capture Using Average for Smoothing Waveforms To smooth the waveform 1 Press P to show the SCOPE key labels 2 Open the WAVEFORM OPTIONS menu with 4 3 Use...

Page 21: ...sistence to observe dynamic signals See Figure 8 1 Press P to show the SCOPE key labels 2 Open the WAVEFORM OPTIONS menu with 4 3 Use the cursor and E to highlight to Waveform and open the Persistence...

Page 22: ...e menu You can use this function to view events glitches or other asynchronous waveforms of 8 ns 8 nanoseconds due to ADCs with 125 MS s sampling speed or wider or you can view HF modulated waveforms...

Page 23: ...dwidth Further noise suppression is possible with bandwidth limiting filters See Noisy Waveforms Waveform Acquisition Set the Acquisition Speed and Waveform Memory Depth To set the acquisition speed d...

Page 24: ...which may provide a more meaningful view An inverted display is identified by an inversed waveform identifier at the right of the waveform and in the status line below the waveform Variable Input Sen...

Page 25: ...example input A do the following 1 Press A to show the INPUT A key labels 2 Press 4 to open the INPUT A menu 3 Use the cursor and E to highlight Bandwidth and select 10kHz to accept the bandwidth limi...

Page 26: ...content of the input A B C or D waveform in the input waveform color It performs an FFT Fast Fourier Transform to transform the amplitude waveform from the time domain into the frequency domain To re...

Page 27: ...ess 2 to set the horizontal amplitude scale to linear or logarithmic 6 Press 3 to set the vertical amplitude scale to linear or logarithmic 7 Press 4 to toggle the spectrum function between off or on...

Page 28: ...if not go to step 5 4 Use h i to select the width of an additional envelope to add to the momentary waveform 5 Press E to store the momentary waveform and show it permanently for reference The displa...

Page 29: ...e a scope screen is saved you will hear a beep See Replay the 100 Most Recent Scope Screens for information on how to analyze the saved screens Waveform Analysis You can use the analysis functions CUR...

Page 30: ...and then select Amps again to see the sensitivity menu Relative Meter Measurements A relative measurement displays the present measurement result relative to a defined reference value The following ex...

Page 31: ...when for example you need to monitor input activity voltage temperature in relation to a known good value Figure 11 Making a Relative Measurement To adjust the reference value 1 Press 3 to open the A...

Page 32: ...r Connections Resistance Value Measurement To measure a resistance 1 Connect the red and black test leads from the 4 mm banana jack inputs to the resistor 2 Press M to show the METER key labels 3 Open...

Page 33: ...ins a typical current measurement in Meter mode XW Warning Carefully read the instructions about the current probe you are using To set up the test tool 1 Connect a current probe for example Fluke i41...

Page 34: ...ity menu 8 Press E to accept the current measurement The display shows the screen in Figure 15 Figure 15 Ampere Measurement Readings Auto Manual Range Selection To activate manual ranging during any M...

Page 35: ...r subsequent measurements Observe the ADJUST REFERENCE soft key 3 that enables you to adjust the reference value 5 Measure the voltage to compare to the reference Now the large reading is the actual i...

Page 36: ...1 Make automatic Scope or Meter measurements see Automatic Scope Measurements The readings plot on the display 2 Press Q to open the RECORDER main menu 3 Use h i to highlight Trend Plot 4 Press E to...

Page 37: ...full waveform 2 Press 3 repeatedly to toggle between normal view NORMAL and overview VIEW ALL When the recorder memory is full an automatic compression algorithm is used to compress all samples into...

Page 38: ...functionality Starting a Scope Record Function To record for example the input A and input B waveform 1 Apply a signal to input A and input B 2 Press Q to open the RECORDER main menu 3 Use the cursor...

Page 39: ...cursor and E to highlight the Mode field select Single Sweep and accept the recorder options 5 Press 1 to start recording Triggering to Start or Stop Scope Record To record an electrical event that ca...

Page 40: ...E to select the 0 12V or 1 2V trigger level and accept all recorder options 9 Apply a trigger signal to the red and black ext trigger banana inputs During recording samples are continuously saved in d...

Page 41: ...100 most recent screens When you press the HOLD key or the REPLAY key the memory contents are frozen Use the functions in the REPLAY menu to go back in time by stepping through the stored screens to f...

Page 42: ...appears at the top of the screen 2 Press 3 to continuously replay the stored screens in ascending order Wait until the screen with the signal event of interest appears 3 Press 3 to stop the continuou...

Page 43: ...oll A position bar displays the position of the zoomed part in relation to the total waveform Note Even when the key labels are not displayed at the bottom of the screen you can still use the arrow ke...

Page 44: ...icon 4 Use h i to move the upper cursor position on the screen 5 Press 2 to highlight the lower cursor 6 Use h i to move the lower cursor position on the screen Note Even when the key labels are not...

Page 45: ...the left cursor icon 6 Use g f to move the left cursor position on the waveform 7 Press 2 to highlight the right cursor 8 Use g f to move the right cursor position on the waveform The screen shows th...

Page 46: ...m the Spectrum measurement screen press G to show the cursor key label 2 Use g f to move the cursor and observe the readings at the top of the screen Rise Time Measurements For rise time measurements...

Page 47: ...reading shows the rise time from 10 to 90 of the waveform amplitude See Figure 24 Figure 24 Risetime Measurement Note Direct access to Rise time or Fall time with cursors on is possible with the key s...

Page 48: ...iggering Pulse Width triggering External Triggering models 190 xx2 only Trigger Level and Slope The Connect and View function enables hands off triggering to display complex unknown signals When the t...

Page 49: ...r delay Observe that the trigger icon on the screen moves to show the new trigger position When the trigger position moves left off of the screen the trigger icon changes to indicate that you have sel...

Page 50: ...he TRIGGER OPTIONS menu 3 Use the cursor and E to open the AUTOMATIC TRIGGER menu If the frequency range of the automatic triggering is set to 15 Hz the Connect and View function responds more quickly...

Page 51: ...ter receiving a trigger the waveform is displayed and the instrument is set to HOLD In most cases use the Free Run mode 4 Use the cursor and E to select Free Run jump to Trigger Filter 5 Use the curso...

Page 52: ...p of the screen See Figure 27 2 Press H to arm the test tool for a new single shot Note The test tool stores all single shots in the replay memory Use the Replay function to look at all the stored sin...

Page 53: ...orms on inputs A and B while triggering on a third signal You can choose external triggering with automatic triggering or with edge triggering 1 Supply a signal to the red and black 4 mm banana jack i...

Page 54: ...ndition 6 Use the cursor and E to select t and jump to Update 7 Use the cursor and E to select On Trigger The test tool is now prepared to trigger on narrow pulses only Observe that the trigger key la...

Page 55: ...Width on A and open the TRIGGER ON PULSE WIDTH menu 4 Use the cursor and E to select the positive pulse icon to trigger on a positive pulse then jump to Condition 5 Use the cursor and E to select t a...

Page 56: ...external flash memory drive USB stick for data storage The maximum memory size is 32 GB Mini USB B port to connect the test tool to a PC for remote control and data transfer under PC control see Fluk...

Page 57: ...by Windows Save and Recall The test tool can Save screens and setups to internal memory and recall them again from memory The test tool has 30 screen and setup memories 10 record and setup memories a...

Page 58: ...o show the SAVE key labels From this point the screen is frozen 2 Press 1 to open the SAVE menu Observe the number of available and used memory locations In METER mode the SAVE AS menu shows as only a...

Page 59: ...e SAVE AS menu 9 Use the cursor and E to highlight OK SAVE to save the actual screen with the edited name To modify the default name generated by the test tool continue from SAVE AS menu in step 8 9 U...

Page 60: ...and jump to the filename field 6 Use h i to select the file to be deleted or 2 to select all files for deletion 7 Press E to delete the selected files Recall Screens with Associated Setups To recall...

Page 61: ...ile looking at the stored screens 1 Press S to show the SAVE key labels 2 Press 2 to open the RECALL menu 3 Press 1 to select the source as internal memory INT or a USB device 4 Press E to jump to the...

Page 62: ...done 10 Press 1 to accept the name and return to the RENAME menu Copy Move Stored Screens and Setup Files You can copy or move a file from internal memory to a USB device or from a USB device to inte...

Page 63: ...USB PORT of the test tool See Figure 32 The USB drivers automatically install See USB Drivers 2 Install the FlukeView 2 Demo version For information about how to install and use the software see the F...

Page 64: ...ction 1 Push F 1 to turn on the WiFi shows in the Information area When prompted by the computer Network Settings or Fluke Connect app for a WiFi name SSID to detect the test tool select the model num...

Page 65: ...ve and the condition of the drive input section Drive DC Bus Use these functions to check the DC bus of the drive DC bus voltage relates to good drive input and load conditions DC bus ripple relates t...

Page 66: ...oblems can be caused by high shaft voltages due to fast high voltage switching of the drive output circuit A brush on the tip of a probe measures the rotating shaft voltage After you select a measurem...

Page 67: ...2 to change to the Volt Peak readings or Current Peak readings Peak Peak Maximum Peak Minimum Peak as well as the Crest Factor ratio between peak and rms value This only changes the readings The volt...

Page 68: ...um deviation from average average of three phases x 100 While voltage unbalance at motor terminals can adversely affect motor operation it can also cause problems at the input side of the drive As lit...

Page 69: ...signal as a combination of various sine waves with different frequencies The contribution of each of these components to the full signal is shown as a bar For example a 5th harmonic is 300 Hz 5 x 60...

Page 70: ...y different Voltage are a low number and current harmonics are a higher number Voltage THD exceeding 6 on any phase can require more investigation Harmonics can be reduced by modification to the drive...

Page 71: ...section A dc voltage that is too low can trip the drive Low voltage can be caused by low input mains voltage or distorted input voltage by flat topping Tips Use the RECORD function to check the dc vol...

Page 72: ...the effective voltage of the switching output based on the average value of samples over a whole number of periods of the fundamental frequency 2 changes the readings on the display to Volt Peak read...

Page 73: ...Zoom 3 the test tool selects a time base that shows the edge of pulse of the modulation signal A pulse with a high peak is selected automatically to find the highest dV dt value The readings change t...

Page 74: ...en filters are applied higher peaks can be visible when measuring Phase Ground compared to Phase Phase Tips Make sure that the slope that is automatically selected is the pulse of the PWM signal and n...

Page 75: ...s on load current and circuit capacity Make sure the phase currents are equal If one of the phases shows a failure it can cause the motor to run hot not start after stopping and loose efficiency A pha...

Page 76: ...stop the motor To set up 1 Remove the black protective cap and black insulation sleeve from the probe tip 2 Place the brush on top of the voltage probe 3 Turn the screw to tighten the brush on the pr...

Page 77: ...times faster than 50 ns can point to grease flash over currents that can damage bearings However no fixed values can be given that can be considered damaging for the motor as there are many factors t...

Page 78: ...ck or fire do not connect the ground spring to voltages 30 Vrms from earth ground Figure 37 Electronic Connections for Measurements with Hook Clip Alligator Clip Ground XW Warning To prevent electrica...

Page 79: ...g signals Additional safety Since the commons are not directly connected the chance of causing short circuit when measuring multiple signals is greatly reduced When measuring in systems with multiple...

Page 80: ...lation sleeve or the hook clip when using the probe reference ground lead The voltage applied to the reference lead is also present on the ground ring near the probe tip as shown in Figure 39 The isol...

Page 81: ...Analog and Digital Reference Figure 41 Correct Connection of Reference Leads M A D A C C B Motion Motor Controller Digital Ground DC Bus A D A B C D Analog Input Digital Controller Analog Ground Digi...

Page 82: ...erence Leads Noise that is picked up by reference lead D can be transmitted by parasitic capacitance to the analog input amplifier A D A B C D Analog Input Digital Controller Analog Ground Digital Gro...

Page 83: ...lt Stand Note An optional Hanging Hook Part Number HH290 attaches to the rear of the test tool The hook enables you to hang the test tool at a convenient viewing position for example a cabinet door or...

Page 84: ...t tool See Figure 45 Figure 45 Hangstrap Reset the Test Tool If you want to reset the test tool to the factory settings without clearing the memories 1 Press O to turn off the test tool 2 Press and ho...

Page 85: ...just the backlight brightness 1 Press U to show the USER key labels 2 Press 4 to select the manual backlight adjustment 3 Use g f to adjust the backlight Note The new value for brightness is stored un...

Page 86: ...ion The display turns off after the selected time 30 seconds or 5 minutes Note If the power adapter is connected there is no automatic power shutdown and the display AUTO off function is inactive Powe...

Page 87: ...nalyze low frequency signal components However when you measure frequencies lower than 15 Hz the test tool must be instructed to analyze low frequency components for automatic triggering 4 Use the cur...

Page 88: ...afe storage of battery pack Do not remove a battery pack from its original packaging until required for use When possible remove the battery pack from the equipment when not in use Fully charge the ba...

Page 89: ...defined as recharged twice a week Heavy use is defined as discharged to cutoff and recharged daily Charging the Batteries At delivery the Li ion batteries may be empty and must be charged for at least...

Page 90: ...personal injury use only the Fluke BP290 not recommended for 190 xx4 BP291 or Fluke recommended equivalent for replacement When no adapter power is supplied data not yet saved in the test tool memory...

Page 91: ...the test tool 3 Unlock the battery cover See Figure 47 4 Lift the tilt stand See 5 Lift the battery cover and remove it See 6 For replacement lift one side of the battery and remove it See 7 Install...

Page 92: ...aded you can continue at step 5 3 Use the cursor and E to select Probe Type Voltage and Attenuation 10 1 4 Press 3 to open the PROBE ON A menu again 5 Press 1 to select PROBE CAL Note It is necessary...

Page 93: ...ote When using 100 1 voltage probes choose 100 1 attenuation to perform an adjustment 100 1 voltage probes require DC calibration Trimmer adjustment is not available Version and Calibration Informatio...

Page 94: ...tative Table 5 Replacement Parts Description Part Number Universal Mains Power Adapter BC190 830 Test Leads with test pins one red one black TL175 Voltage Probe Set Red or Blue or Gray or Green The se...

Page 95: ...black Ground Spring for Probe Tip black Insulation Sleeve black Probe Tip to BNC Adapter VPS510 R red VPS510 B blue VPS510 G gray VPS510 V green Replacement Set for Voltage Probe VPS510 Set includes t...

Page 96: ...n wall HH290 50 Ohm Coaxial Cable Set includes 3 cables 1 red 1 gray 1 black 1 5 m length with safety designed insulated BNC connectors PM9091 50 Ohm Coaxial Cable Set includes 3 cables 1 red 1 gray 1...

Page 97: ...the BC190 power adapter See Display AUTO off Timer Test Tool Cannot Be Turned Off If the test tool cannot be turned off due to a software hangup push the ON OFF key for at least 5 seconds FlukeView 2...

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