ECM BB400MR Instruction Manual
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ECM BB400MR Instruction Manual

ECM BB400MR Instruction Manual

Engine blow-by meter
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Engine Blow-by Meter
Model BB400MR
Instruction Manual
1/02 Part Number 400MRA-7

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Summary of Contents for ECM BB400MR

  • Page 1 Engine Blow-by Meter Model BB400MR Instruction Manual 1/02 Part Number 400MRA-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. BB400MR is a trademark 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 BB400MR Calibrating the BB400MR Problems and Solutions Safety Warnings Warranty and Disclaimers Table of Contents...

  • Page 5: Introduction

    • 11 to 28 VDC operation The BB400MR achieves its 4 to 400 LPM (0.14 to 14.1 CFM) measurement range via three ranges of operation: 4 to 150 LPM (0.14 to 5.3 CFM), 11 to 300 LPM (0.39 to 10.6 CFM), 15 to 400 LPM (0.53 to 14.1 CFM). These ranges are set by opening or closing flow bypass ports inside the meter and meter programming (using keypad).

  • Page 6: Bb400Mr Components List

    BB400MR Components List The following items are included with the BB400MR: Item No. Description Part Number BB400MR Meter 400MRA-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 4 on page 10). This orientation allows condensed materials to drain from the meter and maintain accurate operation. 2. Do not unscrew the two large (~1” diameter) 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 BB400MR can perform both volume flowrate and total volume blow-by measurements. Note that it is “volume”, not “mass” being measured. Further, the volume flowrate is at the temperature and pressure conditions at the inlet to the meter (i.e ACFM, not SCFM).

  • Page 10: Setting The Bb400Mr's Flow Measurement Range

    After changing the meter’s measurement range via the bypass plugs, the meter must be programmed for the selected range (see the section Programming the BB400MR for more information). If this is not done, the meter will give incorrect flowrate information.

  • Page 11: Installing The Bb400Mr

    Figure 3a shows a typical “open crankcase” road draft system. Figures 2b and 3b show how the BB400MR is used with each system. Note that the PCV system in Figure 2a 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 12 Figure 2a: Closed Crankcase PCV System Figure 2b: Using the BB400MR to Measure Engine Blow-by...
  • Page 13 Figure 3a: Open Crankcase Road Draft System Figure 3b: Using the BB400MR to Measure Engine Blow-by How to Use...
  • Page 14 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 BB400MR can be installed so that the inlet or outlet point to the 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 15: Bb400Mr Operation

    • During this process, the analog output will be held at 1.000V and then 4.000V. This can be used to check your data acquisition system hook-up to the BB400MR. (To jump past the above steps, press either the SEL or CLR key).

  • Page 16: Programming The Bb400Mr

    The BB400MR 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. The amount of liquid collected in the tanks over a period in time depends on the engine and the plumbing from the engine to the meter.

  • Page 17: Analog Output

    Out”, or “Pull Plug 1.2.3.4. Out”). The meter will remember the programming even if its power is turned off. The BB400MR can also be programmed via the RS-232 port using the supplied software (BB400MR.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 18: Bb400Mr.exe Serial Communication Software

    • Calibrate the meter A DOS PC-compatible program (BB400MR.EXE) is supplied to demonstrate this capability. BB400MR.EXE may be run as a stand-alone DOS program or in a DOS window within Windows 3.1, 95, or 98. BB400MR.EXE can graphically display the flow rate or total flow in real-time. It is possible to have different operating modes for the BB400MR.EXE display and the meter display.
  • Page 19 Sets the real-time plot type (LPM, CFM, etc.) and the plot scales. The protocol to communicate with the BB400MR is in the Serial Port Programming Interface Description section. With the information contained there, software can be written to communicate with the BB400MR via RS-232.

  • Page 21: Specifications And Limits

    Specifications and Limits Measurements and Accuracy Parameter Range Accuracy Repeatability 1% of reading or 1 LPM Liters/min flowrate 4 to 150 0.5% of reading whichever is greater 1% of reading or 2 LPM Liters/min flowrate 11 to 300 0.5% of reading whichever is greater 1% of reading or 3 LPM Liters/min flowrate...

  • Page 22: Serial Port Programming Interface Description

    BB400MR.EXE (MS-DOS PC) software included with the BB400MR. The BB400MR 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 23 <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 BB400MR 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 24 0=0.1,1=0.2,2=0.5,3=1.0,4=2.0,5=5.0,6=8.0 Download Value Command A "Download Value" command to the BB400MR consists of a header, an index, a two byte unsigned integer value and a two-byte checksum. A total of 10 bytes must be sent. The index is considered an array index (to an unsigned integer value) in the BB400MR. Values successfully received by the BB400MR are acknowledged by <D0><D0>.

  • Page 25: General Information

    The “Upload Selection” command format is: <C8> <C8> <C8> <C8> <DC> <index> <index>. In response to this command, the BB400MR uploads the one-byte selection value twice, for a total of two bytes. This allows for error checking since the two bytes must match to be considered valid data.
  • Page 26 Dimensions: 4” x 14.5” x 5.25” 102mm x 368mm x 133mm (W x H x D) Weight: 5.5 lbs. (2.5 kg)

  • Page 27: Maintenance And Troubleshooting

    51 rows containing the flow in LPM for a vortex frequency 0 to 10,000 Hz (in intervals of 200 Hz) for the 15 to 400 LPM range. BB400MR.EXE allows calibration files to be uploaded from the meter, downloaded to the meter, and generated from new data.
  • Page 28 To calibrate the meter over its entire 4 to 400 LPM range, three calibrations, one for each range, must be performed. 2. Put the BB400MR in the desired flow measurement range using the bypass plugs and programming (see Setting the BB400MR’s Flow Measurement Range).
  • Page 29 To download the calibration file to the BB400MR, use the “DOWNLOAD CAL DATA TO BB400MR” option (under COMMANDS). The calibration file will be downloaded to the BB400MR. Note that the calibration file, not the data file is to be downloaded to the BB400MR.

  • Page 30: 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. 3. The BB400MR does not power-up with a new power cable. Probable cause: One of the two grounds has not been wired.
  • Page 31 Probable cause #1: Meter bypass port set-up and meter flow measurement range programming do not match (ex. all ports closed but meter set-up for 15 to 400 LPM range). Solution: Refer to the sections Setting the BB400MR’s Flow Measurement Range, and Programming the BB400MR. Probable cause #2: Meter was improperly field-calibrated.

  • Page 33: 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 BB400MR 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 35: Warranty And Disclaimers

    The warranty is void if the BB400MR 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 38 Los Altos, CA 94023-0040 • USA • (408) 734-3433 • Fax: (408) 734-3432 www.ecm-co.com...

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