54Magtrol Model DSP7000 Dynamometer ControllerChapter5 – AlarmSystemSETUP • OPERATION5.8 water flow alarm• Used to indicate lack of water flow• Only for use with Eddy-Current or Powder Brake Dynamometers• Default is set in “OFF” mode• Monitored only when the brake is “ON”5.8.1 inSTruCTionS for waTer flow alarM SeTup1. Starting from main menu, press ShIFT.2. Press SETUP button.3. Select DYNo.4. Select ALARMS.5. Press ShIFT. The display should appear as follows:POWERBRAKE STATUS SET POINT SET POINT P I DTORQUE SPEED USER DISPLAYDO YOU WANT WATER FLOW ALARM? XXX Figure 5–19 Water Flow Alarm Setup Display6. Press SCALE I button to select YES.7. Press ShIFT 4 times to complete Water Flow Alarm setup and return to the main menu.5.8.2 waTer flow alarM aCTionWhen there is a lack of water flow, the display will flash “LoW WATER FLoW” (as indicated inFigure 5–20. The alarm relay will open and the excitation current will automatically drop to 10%of the last excitation current. Standby signal is not cycled.POWERBRAKE STATUS SET POINT SET POINT P I DTORQUE SPEED USER DISPLAY**** LOW WATER FLOW ****TORQUE=XXX.XX XX RPM=XXXXXFigure 5–20 Water Flow Alarm Message Display5.8.3 T o reSeT waTer flow alarMPress any front panel button other than ShIFT. If the alarm condition is clear, the unit will returnto normal operation. Although not recommended, another option would be to disable the alarm byfollowing the alarm setup instructions in Section 5.8.1 – Instructions for Water Flow Alarm Setup.
