Powerware ST-2400S user manual Printer / Computer Interface

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The torque set switch is used to set the torque reference which is used to compute the % Torque Rise reading. To set the torque reference, proceed as follows:

Run the engine at it rated speed, loaded at rated power or torque output. This represents the 100% torque output condition for the engine.

With the engine running at its rated speed and load, press the Torque Set switch momentarily. The reference torque value is now set to the rated engine 100% torque and the % Torque Rise display should now read 100.0 (100%). All future measurements will now display the torque on the % Torque Rise meter as the percentage of the reference torque value. For example, if the % torque rise meter reads 75.0, this means that the current actual torque is 75.0% of the reference (or rated) torque.

Printer / Computer Interface:

The Model 2400S horsepower computer is equipped with a RS-232-C compatible serial interface. This interface can be used to operate a small serial printer to make “hard copy” printouts of test results. Alternately, this interface can be used to connect the horsepower computer to a Windows type personal computer for calibration setup and so that test results can be saved, printed using the PC’s printer, etc. The horsepower computer senses which type of device is connected to the serial interface (printer or computer) and operates the interface accordingly. It is NOT possible to connect a serial printer and a personal computer to the horsepower computer at the same time.

The print rate controls (“Report Rate” and/or “Manual Print”) are used to select which measurements are printed or sent to the personal computer. These controls are located on the front panel of the unit, above the Computer Function switch. Your unit may (optionally) be equipped with a remote manual print switch – which functions the same as the manual print switch but which may be located remotely from the horsepower computer.

The Report Rate switch is used to control the rate at which the unit prints test results. Various automatic rates are available, from one report every 10 seconds up to one report every thirty minutes. There is also a “manual” position on this switch. In the manual position, the unit only makes a printout when the manual print switch is pressed (momentarily).

The manual print switch can be used at all settings of the report rate switch. It is NOT necessary to set the report rate switch to manual in order to use the manual print switch (or the optional remote print switch) to trigger a print report.

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Contents Model ST-2400S Horsepower Computer System User Manual In the USA eMail admin@rieslabs.comStar Test Dynamometer, Inc 712 Thistlewood Court Normal, IL Phone 309 Manufacturered by Ries Labs, Inc 2275 Raven Road Farina, IL Phone 618Table of Contents Installation DescriptionOperation Load Cell Rating Ft.-Lbs CHECK readings using Ft.-Lbs. & Horsepower 10,0003750 2856System Power LED Printer / Computer Interface Data Recording Software for the 2400S Dyno32 Software for the 2400S horsepower computerCalibration Setup Software for the 2400S 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 Full scale Torque Ft.-Lbs 45.3 K Ohm Shunt Resistor Torque64.14 128.3E-MAIL ADMIN@RIESLABS.COM In Case of DifficultyIn the USA STAR TEST DYNAMOMETER, INC 712 THISTLEWOOD COURT NORMAL, ILLINOIS PHONE 309 In Mexico, Central & South AmericaProblem There is likely no power to the unit. Check the power supplyPower LED is not lit Power LED comes ONthe RPM sensor connector to be sure that it is tight. Check the cable from the RPM pickup to the horsepower computerCheck the power supply to the horsepower computer. Have the horsepower computer checked