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Troubleshooting
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Summary of Contents for RC watt's up WU100
- Page 1 "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual Model WU100 v2 *** Please visit our website for the latest version of this manual *** Visit our website: "Watt's Up" Watt meter www.rc-electronics-usa.com Revision 1.7.1 9/1/2007...
- Page 2 Notices Copyright Copyright © 2004-2007 by RC Electronics, Inc.. All rights reserved. No part of this manual may be reproduced or transmitted in any form or by an means, analog, digital, electronic or mechanical, including imaging, photocopying and recording, for any purpose other than the purchaser's personal use without the written permission of RC Electronics, Inc., 2980 E.
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Page 3: Table Of Contents
Testing & Troubleshooting Loads..................22 9.1.2 Capturing Current Peaks, Power Peaks and Voltage Minimums (sags)......22 9.1.3 Backup DC Voltmeter & DC Ammeter.................23 9.1.4 Calculating Relative Efficiency....................23 "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. - Page 4 14.2 .......................31 IMITS AND XCLUSIONS 14.3 ......................31 IMITATION OF IABILITY 14.4 ........................31 NTIRE ARRANTY 14.5 ..........32 ROCEDURE FOR ARRANTY LAIMS AND ETURN UTHORIZATION MEASUREMENT LOG........................33 "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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Page 5: Introduction
Effects of modifications, age and damage on many electrical system components Clever RC hobbyists will, no doubt, discover new applications to further improve electric model performance. With Watt's Up you can stop wondering what’s going on with your electric model and get answers that allow you to apply science to your hobby. -
Page 6: Features And Specifications
16 character x 2 row STN Nominal Operating 0 - 50 C ambient Maximum Conditions temperature, non temperature must be condensing humidity reduced at maximum current rating "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 7: Safety Precautions
CAUTION: Shorting a rechargeable battery or a Watt's Up connected to a rechargeable battery or battery charger can supply huge currents and have serious consequences including explosions, causing fire, damage to equipment and personal injury. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 8: Limits Of Connected Equipment
(ESC) and motors, application of currents that cause dangerous heating or voltages that present a shock hazard. Other hazards may exist. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 9: Basics Of Electricity
Coulombs are charge so there we are -- an Amp-hour (or Ah) is 3600 Coulombs of charge. It is common in RC modeling to discuss charge in units of mAh. The m is an abbreviation for the Greek “milli” which means “thousandth” of something. So 1 mAh is 1/1000 of an Ah. -
Page 10: Voltage
For our purposes we will mean Direct Current or DC resistance. Alternating Current or AC resistance is beyond the scope of this tutorial and is not widely discussed in RC electrical systems. Here’s an example problem using resistance. How much voltage drop is there to a motor drawing 50 Amps if the motor is one foot from the battery? Assume14 Ga. -
Page 11: Power
Simply stated, conservation of energy means that energy isn't ever lost; rather it has gone someplace "else." Energy has many forms, Heat, Kinetic, Potential and Chemical being the most relevant to "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 12: About Units
1 A. Similarly, 0.001 V is one thousandth of one volt. Milli is a widely used prefix. E.g. 3000 mAh is another way to write a charge of 3 Ah. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 13: Getting Started
Caution: Never short leads for testing with a power source connected to either set of leads! "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 14: Power Up Checklist
CAUTION: if the Startup Screen does not appear, immediately remove the power sources and refer to the troubleshooting section of this document. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 15: Information Display
Watt's Up. It is measured on the LOAD side. For accurate results, be careful not to interrupt the SOURCE connection to the Watt's Up during a charge measurement. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 16: Power) Watts W, Peak Watts Wp
The displayed Peak Watts value (Wp) is the maximum power drawn on the LOAD side, since the startup screen ended. Watts values are measured on the LOAD side. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 17: Using Watt's Up
This is one of the reasons capacitors and diodes are needed on brushed motors in addition to reducing RF noise. Always disconnect the meter from the highest inductance wiring first. Usually this is on the LOAD side. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 18: Resetting Meter And Clearing Accumulated Values
"jumper cable" approach can be easier to understand and may simplify connector usage. Please see our Internet website connection diagrams and FAQ for additional information on making connections. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. - Page 19 T e s t i n g B a t t e r y ( 4 - 6 0 V ) v 1 . 1 "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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Page 20: Increasing Transient Voltage Protection
See diagram below to better understand the suggestion connections. Three Suggestions: "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. - Page 21 © c o p y r i g h t 2 0 0 4 - 2 0 0 7 R C E l e c t r o n i c s , I n c . A l l r i g h t s r e s e r v e d "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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Page 22: Battery Characterization
Note that shorting a "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 23: Low Voltage Measurement
Watt's Up's low operating current minimizes the impact its presence has on low power systems. To support low voltage measurement, just connect a power source to the auxiliary power connector. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 24: System Characterization
Watt's Up turns on (i.e. is powered up). So remove all power sources when you need to clear them for a new measurement. See the Ap, Vm and Wp in the Data Queue 100.00A 10.00V Data Queue 1000.0W "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 25: Backup Dc Voltmeter & Dc Ammeter
Now connect the Watt's Up to the second system. Adjust the ESC to bring it to the same operating point. Compare the new Watts reading to the old one to determine the relative efficiency of the two systems. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 26: Watt's Up Applications
10.5 Balancing Battery Pack Cells You don't want battery pack cells going below their minimum safe voltages for safety and battery life reasons. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 27: Receiver And Servo Testing
Connecting the Auxiliary power after the SOURCE may be better for eliminating measurement of power dips immediately following SOURCE power connections. Try both before and after. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. - Page 28 Unexpected peaks may be due to stalled or defective servos or linkages, etc. Remove power from both Auxiliary and SOURCE to reset the peak and minimum values. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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Page 29: Care
Store your Watt's Up in a safe place where is protected from impact and scratches to the LCD display. Do not store in direct sunlight. Prolonged exposure (years) to direct sunlight will break down the plastics used in the Watt's Up. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc. -
Page 30: Troubleshooting
SOURCE side wires and a simple, known good load like a brush type motor, 110 V 100 W light bulb or RC receiver. The Watt's Up only measures currents flowing in the direction of SOURCE to LOAD. Make sure that the setup is arranged tat way. - Page 31 It is normal for the Watt's Up and its warm wiring to get warm at high currents. You can cool it with a small fan blowing on the wires. "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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Page 32: Support
Support SUPPORT If you are experiencing technical problems, and cannot find a solution in this manual, you can contact RC Electronics, Inc. for further assistance. RC Electronics, Inc. 2980 E. Capitol Expy. #50-194 San Jose, CA 95148 Phone: 408-705-1980 Fax: 408-834-7413 Technical Support Email: rc_support@rc-electronics-usa.com... -
Page 33: Warranty
(including damages for loss of business profits, business interruption, loss of business information, and the like) arising out of the use or inability to use the product even if RC Electronics, Inc. has been advised of the possibility of such damages. Because some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages, the above limitations may not apply. -
Page 34: Procedure For Warranty Claims And Return Authorization
For warranty claims and repair returns on products purchased directly from RC Electronics, Inc., you will need a copy of your sales invoice. Please contact RC Electronics, Inc. directly to get a RMA # and return instructions. -
Page 35: Measurement Log
Use the forms below to easily record your data for immediate and future reference. Make photocopies so they're always handy. Amps Amps Volts Volts Watts Watts Amps Amps Volts Volts Watts Watts Amps Amps Volts Volts Watts Watts "Watt's Up" & "Doc Wattson" Watt Meter and Power Analyzer User's Manual RC Electronics, Inc.
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