Powerware ST-2400S user manual Operation

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Power Supply:

The Model 2400S horsepower computer is normally operated from 110 to 125 VAC (60 Hz) using the outlet mounted power supply that is supplied with the unit. The power consumption of the computer is very low and the unit has a very high tolerance for power supply variations, so nearly any standard 115 VAC utility power outlet should power the unit adequately. See (below) information on a special (optional) “wide-range” power supply which will power the unit properly when the line voltage is either very low or very high.

The computer may also be operated from a source of 12 to 18 Volts DC such as a small DC power supply or 12 Volt storage battery. If a storage battery is used, be sure that it is properly charged. If the battery voltage is low, the POWER LED of the unit will flash “on” and “off” about once every second – indicating that the power supply voltage is inadequate to power the unit properly. NOTE: WHEN

OPERATING THE UNIT FROM A BATTERY OR POWER SUPPLY, THE POLARITY (+/- WIRING) MUST BE CORRECT OR THE UNIT WILL NOT OPERATE. WIRING A BATTERY OR POWER SUPPLY TO THE UNIT WITH IMPROPER POLARITY MAY RESULT IN DAMAGE TO THE UNIT.

Operation of the unit from a 110 to 250 VAC 50 to 60 Hz power source

A special “universal input” power supply is available (as an option) which will allow the unit to be operated from a wide range of AC power sources – both domestic and international.

This power supply has a detachable power cable which may be easily replaced with a power cable which matches the local power system.

This power supply is also very useful when operating the unit from power sources which may be lower than standard and/or slightly erratic. This power supply will result in proper operation when the AC power source is a low as about 90 Volts AC.

Operation:

The horsepower computer normally operates with a two second measurement cycle. It can optionally be factory programmed for a one second measurement cycle. During the measurement cycle, the RPM of the dynamometer shaft is measured along with the torque sensed by the dynamometer load cell. At the end of each measurement cycle, the RPM and TORQUE values (averaged over the measurement interval) are displayed and the POWER and % TORQUE RISE

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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 Calibration Setup Software for the 2400S Software for the 2400S horsepower computerData 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 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
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