DALT55 INSTRUCTION SUPPLEMENT61-101-02184_02186-B Page 9/14Jan /10 /20132) DISPLAYThe DISPLAY option in the main menu allows selection of two types ofactive display:Aeronautical display shows simulated altitude and vertical speed.Pressure display shows static (Ps) pressure.3) EPR TEST (Engine Pressure Ratio)Note: EPR is only available if DAS650 and DALT55 are connected.Using the Maintenance menu in Level 1, both instruments mustalso be configured for the two-instrument configuration.Selecting EPR allows user to view instrument’s calculated Pt, Ps andEPR readings.4) MAINTENANCETwo submenus are available for maintenance functions such ascalibration, configuring unit for two-instrument link and enabling andsetting the automatic power off timer.LEVEL 1 submenu contains tester general information (See Chart 2).CHART 2 LEVEL 1 SUBMENU(a) TransducerDevice ID: displays the transducer’s manufacturer, P/N, S/Nand range.Coefficients: displays the four (K00-K03) temperature com-pensation coefficients stored in the transducer’s EEPROM.(b) Model, S/NDisplays tester’s range, firmware version, build, S/N.LEVEL 1Build, S/N, F/W Level Pressure SlopeCalibration DateStand-alone2-instrumentsTRANSDUCER MODEL, S/N CONFIGMFG, P/N,S/N, Range EEPROMCoefficientsDEVICE ID COEFFICIENTCAL. COEFF.