ECM BB100 Instruction Manual
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ECM BB100 Instruction Manual

Engine blow-by meter
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Engine Blow-by Meter
Model BB100
Instruction Manual
9/00 Part No. 100A-7

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Summary of Contents for ECM BB100

  • Page 1 Engine Blow-by Meter Model BB100 Instruction Manual 9/00 Part No. 100A-7...
  • Page 2 No part of this manual may be photocopied or reproduced in any form without prior written consent from ECM: ENGINE CONTROL AND MONITORING. Information and specifications subject to change without notice. BB100 and BBremote are trademarks of ECM: ENGINE CONTROL AND MONITORING. Printed in the United States of America.

  • Page 3: Table Of Contents

    Specifications and Limits Measurements and Accuracy Operational Limits Output Specifications Serial Port Programming Interface Description General Information Maintenance and Troubleshooting The Sight Glass and Cleaning the BB100 Calibrating the BB100 Problems and Solutions Safety Warnings Warranty and Disclaimers Table of Contents...

  • Page 5: Introduction

    Introduction The BB100 The BB100 Engine Blow-by Meter is compact, versatile, and rugged instrument for spot and continuous blow-by measurement of spark ignition and diesel engines. The BB100 is suitable for use in dynamometer cells, in-vehicle, and as a portable tester.

  • Page 6: Bb100 Components List

    BB100 Components List The following items are included with the BB100: Item No. Description Part Number BB100 Meter 100A-1 Mounting Bracket and Hardware 100A-2 Power Cord, 10’ 100A-3 AC/DC Adapter 100A-4 AMP connector and terminals for Power Input 100A-5 (same connector as on AC/DC Adapter)

  • Page 7: Important Operation Notes

    Important Operation Notes 1. Mount the meter using the supplied bracket or in a similar orientation (see Figure 3 on page 9). This orientation allows condensed materials to drain from the meter and maintain accurate operation. 2. Do not unscrew the two large (~1” dia.) screws on the sides of the meter. These lead to the ultrasonic transducers and their removal may modify the calibration of the meter.

  • Page 9: How To Use

    2. The total volume of blow-by (in liters or cubic feet) that comes out of the engine while it executes a driving cycle (ex. FTP cycle). The BB100 can perform both volume flowrate and total volume blow-by measurements. Note that it is “volume”, not “mass” being measured. To get mass flowrate measurements, temperature and pressure transducers need to be installed in the meter (provisions provided) and the ideal gas law is used.

  • Page 10: Installing The Bb100

    Figure 2a shows a typical “open crankcase” road draft system. Figures 1b and 2b show how the BB100 is used with each system. Note that the PCV system in Figure 1a is “opened” for the blow-by measurement. If the system is not opened, the measurement will be more a function of throttle position than actual blow-by.
  • Page 11 Figure 1a: Closed Crankcase PCV System Figure 1b: Using the BB100 to Measure Engine Blow-by How to Use...
  • Page 12 Figure 2a: Open Crankcase Road Draft System Figure 2b: Using the BB100 to Measure Engine Blow-by...
  • Page 13 Do not vent the blow-by to a room where people are in because blow-by is essentially exhaust (poisonous). 4. The outer tanks of the BB100 can be installed so that the inlet or outlet point left or right. No matter what directions the inlet and outlet face, it is important that the holes in the inner tanks (under the outer tanks) face away from the inlet or outlet hose connections.

  • Page 14: Bb100 Operation

    CLR has no effect on flowrate readings. The BB100 has integral damping tanks and oil and water separators on both the inlet (upper) and outlet (lower) sides of the meter. Blow-by can condense in the meter leaving liquid in the tanks.

  • Page 15: Programming The Bb100

    Refer to the Cleaning the BB100 section for more information. Programming the BB100 The BB100 has three programmable functions. The three functions can be programmed either via the meter’s keypad or RS-232. The programmable functions are: 1. Display, analog output, and RS-232 update rate. Options are: F: Fast, A: Average, S:Slow.

  • Page 16: Analog Output

    The meter will remember the programming even if its power is turned off. The BB100 can also be programmed via the RS-232 port using the supplied software (BBREMOTE.EXE) or a user-written program that abides by the communication protocol described in the Serial Port Programming Interface Description section of this manual.
  • Page 17 Sets the PC communications port to either COM1 or COM2. COMMANDS Real-Time Flow Display On Starts real-time text display mode on the PC. Values for all four of the BB100 operating modes are displayed. Real-Time Flow Display Off Halts real-time text display mode on PC.
  • Page 18 Sets the real-time plot type (LPM, CFM, etc.) and the plot scales. The protocol to communicate with the BB100 is in the Serial Port Programming Interface Description section. With the information contained there, software can be written to communicate with the BB100 via RS-232.

  • Page 19: Specifications And Limits

    Specifications and Limits Measurements and Accuracy Parameter Range Accuracy Repeatability Liters/min flowrate 4 to 150 1% of reading 0.5% of reading /min flowrate 0.15 to 5.4 1% of reading 0.5% of reading Liters total flow 0 to 1000 1% of reading 0.5% of reading total flow 0 to 100.0...

  • Page 20: Serial Port Programming Interface Description

    (MS-DOS PC) software included with the BB100. The BB100 may be operated both under remote control and “local” control at the same time. Setup parameters such as the operating mode may be changed either on the meter or with the serial port interface.
  • Page 21 <C8> <C8> <C8> <C8> <D9> <2> <2>. The valid Control command numbers and their functions are as follows: 1: Upload status byte. Returns <A2> <A2> if the BB100 is ready to accept serial port commands. 2: Poll command. This command causes the uploading of a packet of flow data. The data is sent as <C8>...
  • Page 22 A total of 12 bytes must be sent. The index is considered an array index (to a float value) in the BB100. Any indices not in the range specified below should never be changed by the external computer. Values successfully received by the BB100 are acknowledged by <D0>...

  • Page 23: General Information

    Terminal 4: Case Power Connector: Silver connector to mate to BB100 body: Hirose RM12BPG-4S(07) Black connector to mate to cable P/N 100A-3: AMP 206060-1 (plug), AMP 206062-1 (clamp), AMP 66105-4 (sockets, 4 req.) Fuse: Internal, automatically resetable Pipe Plug Size: 1/8”...

  • Page 25: Maintenance And Troubleshooting

    Calibrating the BB100 The BB100 can be field-calibrated using the program BBREMOTE and a calibration file. The calibration file for the supplied meter is called ####.BB (where #### is the serial number) and is on the same floppy disk as BBREMOTE.
  • Page 26 4. Starting at a flow of about 4 LPM, record the frequency from the BB100 and the actual (ie. not corrected to “standard” conditions) volume flowrate entering the BB100. Keep in mind that due to pressure and temperature changes between the flow calibration...

  • Page 27: Problems And Solutions

    Probable cause: One of the two power grounds has been incorrectly wired. Solution: Correctly wire the power to the meter. See General Information section. 4. The BB100 does not power-up with a new power cable. Probable cause: One of the two grounds has not been wired.
  • Page 28 If meter is too jumpy, make display and analog output update rate slower, and flow averaging period longer. See Programming the BB100 on page 11 for more information.

  • Page 29: Safety Warnings

    Operate the engine only in a well ventilated area and never when you or one of your co- workers is tired. When operating the BB100 in a vehicle, the operator should keep his or her eyes on the road. One measure of professionalism is how much you and your co-workers can accomplish without an injury.

  • Page 31: Warranty And Disclaimers

    The warranty is void if the BB100 is disassembled beyond its four tanks. LIMITATION OF REMEDY Seller's liability arising from or in any way connected with the items sold and/or services provided shall be limited exclusively to repair or replacement of the items sold or refund of the purchase price paid by buyer, at seller's sole option.
  • Page 34 Los Altos, CA 94023-0040 • USA • (408) 734-3433 • Fax: (408) 734-3432 www.ecm-co.com...

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