53Magtrol Model DSP7000 Dynamometer Controller C h a p t e r 5 – AlarmSystemSETUP • OPERATIONPOWERBRAKE STATUS SET POINT SET POINT P I DTORQUE SPEED USER DISPLAYDO YOU WANT AN AIR FLOW ALARM? XXX Figure 5–17 Air Flow Alarm Setup Display5. Press SCALE I button to select YES.6. Press ShIFT 5 times to complete Air Flow Alarm setup and return to the main menu.5.7.2 air flow alarM aCTionWhen there is a lack of air flow, the display will flash “LoW AIR FLoW” (as indicated in Figure5–18) . The alarm relay will open and the excitation current will automatically drop to 10% of thelast excitation current. Standby signal is not cycled.POWERBRAKE STATUS SET POINT SET POINT P I DTORQUE SPEED USER DISPLAY**** LOW AIR FLOW ****TORQUE=XXX.XX XX RPM=X XXXXFigure 5–18 Air Flow Alarm Message Display5.7.3 T o reSeT air 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 5.7.1 – Instructions for Air Flow Alarm Setup.
