2.) The instrument has been moved
3.) The load cell of the dynamometer has been replaced, overloaded, dropped or otherwise mistreated.
4.) The power supply to the unit has been repaired or replaced.
5.) Prior to any measurements that require especially high accuracy.
6.) The instrument has been repaired, exchanged or replaced.
IMPORTANT NOTE:
The Model 2400S is a delicate instrument and should be treated accordingly. It should not be allowed to get wet, be exposed to excessive temperatures, dropped or subjected to excessive shock or vibration. It should only be used with an approved power supply.
It contains no user serviceable parts and no attempt should be made to repair or modify the unit.
If the unit is in need of repair, it should be returned to the dealer or directly to Ries Labs, Inc. for repair.
When it becomes necessary to check the calibration of the unit, follow the procedure below.
Calibration Procedure:
The Model 2400S horsepower computer uses quick and easy “push- button” calibration methods and can be calibrated using a variety of methods. Be sure to use the one that is correct for your dynamometer system and the calibration tools that are available to you.
Prior to attempting calibration, first verify that the 2400S is operating correctly using the ZERO and CHECK positions of the computer function switch. If the 2400S does not pass these checks, there is a problem with the unit and it should be repaired before any attempt is made to calibrate the unit.
Calibration of the Model 2400S is a simple, two step process:
1.) Set the ZERO calibration: The dynamometer should not be running and should be disconnected from the engine, tractor, motor, etc. The RPM reading should be exactly zero and the TORQUE reading should be fairly close to zero – especially if the unit has previously been calibrated to the load cell. If necessary, disconnect the load cell from
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