Powerware ST-2400S user manual Description, Installation

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Description:

The function of the Model 2400S Horsepower Computer is to provide the operator with a continuous digital readout of the RPM, TORQUE, POWER (Horsepower or Kilowatts) and percentage of Torque Rise ( % TORQUE RISE) when properly attached to a compatible dynamometer.

The RPM readout shows the operator the rotation speed (rotations per minute) of the power shaft of the dynamometer. The RPM is measured by a pickup and gear combination that is mounted on the dynamometer and coupled to the power shaft of the dynamometer.

The TORQUE readout shows the operator the torque (Foot-Pounds or Newton-Meters) being produced by the prime mover being tested. This is the same as the torque applied to the dynamometer by the power source (motor, engine, drive wheels, etc.). The torque is measured by a load cell that is mounted on the dynamometer.

The POWER readout shows the operator the amount of power being produced by the prime mover and applied to the dynamometer. This is the same as the power being absorbed by the dynamometer. It is computed by the Horsepower Computer using the RPM and Torque measurements using the formulae below:

HORSEPOWER = ( RPM * TORQUE (foot-pounds) ) / 5252

KILOWATTS = ( RPM * TORQUE (Newton-Meters)) / 9549

The % Torque Rise (% Torque Load) meter shows the torque as a percentage compared to a reference torque value. It is used to measure the “lugging ability” of an engine.

The Horsepower Computer has a RS-232 compatible serial interface which can be connected EITHER to compatible serial printer OR to an external computer system. When connected to a printer, the system may be used to provide a “hard copy” printout of measurement results. When connected to an external computer, the system may be used for printing, storing, graphing, (etc.) the measurements performed by the dynamometer system (including the dynamometer, horsepower computer, and external computer).

Installation:

The Model 2400S horsepower computer should be installed in a location where the unit is not exposed to wetness, extremely high temperatures, prolonged direct sunlight, or other

environmental factors that would shorten the life expectancy of the unit.

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Contents Manufacturered by Ries Labs, Inc 2275 Raven Road Farina, IL Phone 618 Model ST-2400S Horsepower Computer System User Manual In the USAeMail admin@rieslabs.com Star Test Dynamometer, Inc 712 Thistlewood Court Normal, IL Phone 309Table of Contents Description InstallationOperation Load Cell Rating Ft.-Lbs 2856 CHECK readings using Ft.-Lbs. & Horsepower10,000 3750Torque Set Switch Printer / Computer Interface Software for the 2400S horsepower computer Calibration Setup Software for the 2400SData Recording Software for the 2400S Dyno32 1. The instrument has been dropped or otherwise mistreated Calibration Procedure the torque arm of the dynamometer to insure that there is no force being applied to the load cell which would result in an inaccurate zero calibration. Remove the calibration access cover panel and set the calibration mode switch to the ZERO position. Also, be sure that the shunt resistor switch is set to the OFF position. At this time note that the RPM display of the unit should indicate “1111” and the POWER display should indicate “0000”. The TORQUE display indicates the TORQUE and should read near zero. If the torque indication is excessive plus or minus, the POWER display will read “EEEE” - which indicates that the zero offset of the load cell is excessive and that the ZERO calibration cannot proceed see calibration notes below. Otherwise, press and release the ENTER push-button switch to perform the zero calibration. At this point, the TORQUE display should indicate zero and the zero calibration procedure has been completed positive and negative torque to the unit and verify that the torque reading returns closely to the same value. A failure here indicates a likely problem with the dynamometer. Have the dynamometer checked by your dealer or dyno service person 128.3 Full scale Torque Ft.-Lbs45.3 K Ohm Shunt Resistor Torque 64.14NORMAL, ILLINOIS PHONE 309 In Mexico, Central & South America E-MAIL ADMIN@RIESLABS.COMIn Case of Difficulty In the USA STAR TEST DYNAMOMETER, INC 712 THISTLEWOOD COURTPower LED comes ON ProblemThere is likely no power to the unit. Check the power supply Power LED is not litthe horsepower computer checked the RPM sensor connector to be sure that it is tight. Checkthe cable from the RPM pickup to the horsepower computer Check the power supply to the horsepower computer. Have
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