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1 Before you Begin & Qualified Installer Requirements
BEFORE YOU BEGIN
Carefully read this Installation Guide before installing this
product. If anything is unclear, please contact BASE
Engineering
Ensure that the NEGATIVE battery connection is disconnected
before
NOTE: Some components may lose short-term memory (i.e. engine or
transmission adaptive parameters and radio presets) after a prolonged time without battery power.
Accu-Max+ should be serviced by qualified, trained personnel only. Attempting to remove the
cover or disassemble the device could expose you to dangerous high voltage points.
Do not attempt to install or operate a damaged device. If the unit has been exposed to excessive
amounts of water, shows evidence of physical damage, or is not operating properly, unplug it
from
the
Use of thread-locking compounds, such as Loctite, may cause serious damage to plastic
enclosures. Many thread-locking compounds are not compatible with thermoplastics and can lead
to stress-cracking.
Marshall Excelsior Company
1506 George Brown Drive Marshall, MI 49068
Phone (269) 789-6700 Fax (269) 781-8340
www.marshallexcelsior.com
The contents of this publication are for informational purposes only. While every effort has been made to ensure accuracy, these contents are not to be construed as warranties or
guarantees, expressed or implied, regarding the products or services described herein or for their use or applicability. Marshall Excelsior Co. and BASE Engineering reserve the right to
modify or improve the designs or specifications of such products at any time without notice. The MEC™/BASE™ logo is the trademark of Marshall Excelsior Co. and BASE Engineering.
FORM #1173
Installation Information
for
beginning
power
source
and
support.
work.
contact
qualified
600 Rothesay Ave, Saint John, NB E2H 2H1, Canada
Phone (506) 635-2280 Fax (506) 635-2281
1
ACCU-MAX+ SERIES
service
personnel.
Base Engineering
www.baseng.com
REV B 7/13/2021

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Summary of Contents for Marshall Excelsior Accu-Max+ Series

  • Page 1 Marshall Excelsior Co. and BASE Engineering reserve the right to modify or improve the designs or specifications of such products at any time without notice. The MEC™/BASE™ logo is the trademark of Marshall Excelsior Co. and BASE Engineering.
  • Page 2: Qualified Installer

    ACCU-MAX+ SERIES QUALIFIED INSTALLER This product is to be installed by qualified installation personnel only. The installer must be trained in industry best- practices for this type of installation. The training would include but not be limited to: 1. The appropriate methods for installing cables such that: •...
  • Page 3 ACCU-MAX+ SERIES 3. The correct use and operation of the required tools such that: The installer must have the ability to read, understand and follow the instructions in the installation • manual. • The installer must be equipped with the correct tools for performing each installation operation.
  • Page 4: System Components

    ACCU-MAX+ SERIES 2 System Components Accu-Max System includes the following key components: Digital Dial Barrier Harness Optional Brake Pressure Switch DIGITAL DIAL BARRIER Gray Black Connector Connector To Battery through a 2A Fuse +12/24VDC Brake Pressure Switch Black (optional) To PC3 Receiver or OBC...
  • Page 5: Installation

    ACCU-MAX+ SERIES 3 Installation If the digital dial is used without activating the tilt compensation feature, it may be located in any of • the 6 standard positions shown in Figure 2, including the default “End Mount” identified as Position In order to enable the tilt compensation feature, the dial must be configured with the tank •...
  • Page 6: System Operation

    ACCU-MAX+ SERIES 4 System operation 4.1 Digital Dial Fill level bar graph Tilt compensation is Fill level as a percent active when lit Mounting hole Mounting hole Product volume estimate Note: Only valid when tank dimensions are calibrated properly Dial harness connector 4.2 BASE Engineering External Safety Barrier...
  • Page 7: Operational Specification

    ACCU-MAX+ SERIES 5 Operational Specification Power Supply: 12V / 24V (Absolute Range 9V – 32V) • Nighttime Backlit Current Draw: 90mA @ 12V • • External Fuse Rating: 2A Communication Link: MODBUS over RS485 at 9600 Baud • Operating Temperature Range: -40°C to +50°C •...
  • Page 8: Mechanical Specification

    ACCU-MAX+ SERIES 6 Mechanical Specification 4.65" 5.22" 4.02" 4.625" 2.95" 4.73" Ø0.315" Gray Black Connector Connector Length: 15' Length: variable Black Length: 15' Length: 3' 3/8" NPT Black 0.827" Length: 1.5' 1.968" FORM #1173 REV B 7/13/2021...
  • Page 9 ACCU-MAX+ SERIES 7 Dial Configuration The basic “out-of-the-box” configuration of the Accu-Max+ digital dial can only provide a reading of the percentage fill of product within the tank. In order to enable the volume and tilt compensation, the dial must be loaded with all key details of the tank, including dimensions, float arm measurements and precise location of the dial.
  • Page 10 ACCU-MAX+ SERIES Figure 7-1: Float Arm Mounting - Pivot Point and Proud/Recess Mount Use the table below to help gather all required information: Table 7-1: Dial Configuration Worksheet Parameter Value Notes Tank Length, inches Outer dimension. Generally stamped on the tank plate.
  • Page 11: Troubleshooting

    ACCU-MAX+ SERIES 8 Troubleshooting 8.1 Barrier Troubleshooting Blue Power LED is not illuminated. • o Ensure barrier has power, with a voltage range not exceeding +9V to +32V. Check for blown 2A fuse and replace it if necessary.  Ensure vehicle is providing power to barrier (verify operating conditions of the ...
  • Page 12: Appendix A: Hazardous Location Details

    ACCU-MAX+ SERIES Appendix A: Hazardous Location Details WARNING! When installed in hazardous locations where the dial may be exposed to flammable vapors (e.g. propane), the dial must be connected via a suitably rated intrinsically safe power supply. The connection of non-intrinsically safe power and communication could result in fire or explosion of flammable vapor causing serious injury or death.
  • Page 13 ACCU-MAX+ SERIES Installation Notes: 1. Selected associated apparatus must be third party listed as providing intrinsically safe circuits for the application, and have Voc or Vt not exceeding Vmax (or Uo not exceeding Ui), Isc or It not exceeding Imax (or Io not exceeding Ii), and the Po of the associated apparatus must be less than or equal to the Pmax or Pi of the intrinsically safe equipment, as shown in Table A-2.

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