Powerware ST-2400S User Manual
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).
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
not exposed to wetness, extremely high temperatures, prolonged direct sunlight, or other
environmental factors that would shorten the life expectancy of the unit
.
3