Powerware ST-2400S user manual Load Cell Rating Ft.-Lbs

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values are computed and displayed. This process is repeated continuously while the unit is in operation.

Computer Function Switch:

The computer function switch is used to turn the system power ON/OFF and to control the functional operation of the horsepower computer. The function switch has four positions ( “OFF”, “ZERO”, “CHECK”, and “RUN”).

In the “OFF” position, the power to the horsepower computer (and the load cell, etc.) is turned “OFF”. The power is turned “ON” in the other three positions of the computer function switch.

The horsepower computer has two user controllable self test modes (“ZERO” and “CHECK”). These can be used to test much of the horsepower computer’s internal circuits for proper operation. In the ZERO position, internal test signals are fed into the RPM and TORQUE measurement circuits. In the ZERO position of the function switch, these signals should result in readings of zero on all four displays. If the reading of any display remains substantially different from zero (more than +/- 1 or 2 counts) when in the zero mode, some type of malfunction of the unit is indicated.

The second user controllable test mode is the CHECK mode. In this mode, internal test signals are fed to the RPM and TORQUE measuring circuits to simulate normal operation of the unit at about 37.5 % of full scale torque. The actual readings shown on the displays of the unit depend on internal factory set optional settings – principally the full scale torque value (which corresponds to the size of the load cell being used with the unit). The RPM display should read about 4000 RPM (+/- 1 or 2 counts) on all units. The Torque display should read about 37.5 % of the load cell rating. Refer to the tables below for the proper readings of the Torque and Power displays for your unit. The Power reading should agree with the power you compute from the actual RPM and TORQUE readings (within +/- 1 or 2 counts) using the above formulae for the horsepower or kilowatts.

Load Cell Rating (Ft.-Lbs.)

Torque (Ft.-Lbs.)

Power (HP)

100

37.50

28.56

200

75.00

57.10

500

187.5

142.8

1,000

375.0

285.6

2,000

750.0

571.0

5,000

1875

1428

5

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Contents eMail admin@rieslabs.com Model ST-2400S Horsepower Computer System User Manual In the USAStar Test Dynamometer, Inc 712 Thistlewood Court Normal, IL Phone 309 Manufacturered by Ries Labs, Inc 2275 Raven Road Farina, IL Phone 618Table of Contents Description InstallationOperation Load Cell Rating Ft.-Lbs 10,000 CHECK readings using Ft.-Lbs. & Horsepower3750 2856Torque Set Switch 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 45.3 K Ohm Shunt Resistor Torque Full scale Torque Ft.-Lbs64.14 128.3In Case of Difficulty E-MAIL ADMIN@RIESLABS.COMIn the USA STAR TEST DYNAMOMETER, INC 712 THISTLEWOOD COURT NORMAL, ILLINOIS PHONE 309 In Mexico, Central & South AmericaThere is likely no power to the unit. Check the power supply ProblemPower LED is not lit Power LED comes ONthe cable from the RPM pickup to the horsepower computer the RPM sensor connector to be sure that it is tight. CheckCheck the power supply to the horsepower computer. Have the horsepower computer checked
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