J.P. Instruments EDM-900 Pilot's Manual
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J.P. Instruments EDM-900 Pilot's Manual

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See also: Installation Manual
Enlarged version
Pilot's Guide
Engine Data Management
EDM-900
Primary
TSO/STC
Copyright  2011 J.P. Instruments, Inc.
All Rights Reserved
J.P. INSTRUMENTS INC.
Information: P. O. Box 7033
Huntington Beach, CA 92646
Factory: 3185-B Airway Ave.
Costa Mesa, CA 92626
(714) 557-3805
Fax (714) 557-9840
www.jpinstruments.com
Rev B
Printed in the United States of America
For Your Safe Flight
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  • Page 1 Pilot’s Guide Engine Data Management EDM-900 Primary TSO/STC Copyright  2011 J.P. Instruments, Inc. All Rights Reserved J.P. INSTRUMENTS INC. Information: P. O. Box 7033 Huntington Beach, CA 92646 Factory: 3185-B Airway Ave. Costa Mesa, CA 92626 (714) 557-3805 Fax (714) 557-9840 www.jpinstruments.com...

  • Page 2: Table Of Contents

    Table of Contents Section 1 - Section-1 Getting Started View Angle Rotation Fuel Flow Computer Basics (independent of fuel quantity) Display Screen Basics Horizontal Display Mode Vertical Display Mode Remote Annunciate Light Basics RPM and MAP Display Basics Linear Bar Graph Display Basics LeanFind Basics Section 2 - Interpreting Data...
  • Page 3 Troubleshooting the EDM Diagnostic Testing on Startup and During Flight Diagnostic Messages Section 12 - Appendices Shock Cooling (CLD) Navigation Data Formats Navigation Data Ports for GPS Comm Interface connections to selected GPS models Section 13 - Technical Support For Your Safe Flight ..........Page 3...
  • Page 4 Product Features  Hands-free, automatic scanning  Lean Find finds the first and last cylinder to peak with true peak detect—eliminates false peaks  Displays both leaned temperature below peak and peak  Battery voltage with alarm  Amperes (load or charge/discharge meter) ...

  • Page 5: View Angle

    This is a summary of basic operation. Detailed descriptions of all operations appear later in this Pilot’s Guide. EDM-900 primary instrument has preset alarm limits and cautionary ranges per the POH (user cannot change them) typically for the following measurements of: oil temperature, oil pressure, fuel pressure, fuel quantity, cylinder head temperature, turbine inlet temperature, manifold pressure, and RPM.
  • Page 6 List of abbreviations and acronyms Message Area Gauge Function Alarm Abbreviation Primary Primary Engine rotational speed RPM xxxx Engine Manifold Pressure MAP xx.x in hg Engine Cylinder Head Temp CHT2 xxx Engine Oil Temperature O-T xxx Engine Oil Pressure O-P xxx Fuel Pressure F-P xx PSI Fuel Flow to engine...

  • Page 7: Rotation

    Rotation Holding the step button in for 5 seconds, with the engine OFF, will produce the gray arrow. This arrow can be rotated to a new up position by tapping the LF button to rotate and then the STEP button for save. If you chose the one bad angle (Landscape mode with the buttons on top and the JPI logo upside down), return the instrument to JPI and JPI will rotate the screen with the buttons on the bottom.

  • Page 8: Display Screen Basics

    Display Screen Basics The display screen is arranged into three sections. The top left is the MAP and RPM section. The bottom left is the Scanner® section or message area. On the right side are the horizontal primary strip gauges. Non-Primary gauges have a digital read out only.

  • Page 9: Vertical Display Mode

    Vertical Display Mode Remote Annunciate Light Basics The Remote Annunciator Light ‘RAL’ provides notification that an alarm is present in the display, for all Primary gauges. Upon power up, the RAL shows Red and yellow indicating it is functional. Before each flight, Remote confirm that it is functional.

  • Page 10: Rpm And Map Display Basics

    Horizontal mode Vertical mode RPM and MAP Display Basics In the vertical mode to the right and the Horizontal mode above MAP (Manifold Pressure) and RPM (Revolutions per Minute) are shown. Operations exceeding red line cause the digital value to turn red or yellow with the RAL coming on and a digital value in the Scanner message area.
  • Page 11 Scanner® Information Area The Scanner® Information Area provides expanded information in the form of alpha-numeric messages, parameters and calculations. In Auto-Scan, parameters will ‘scan by’ once every 4 seconds (default). This rate can be changed in Pilot Programming Mode. Tap the STEP button for ‘Manual’ selection of any parameter.

  • Page 12: Leanfind Basics

    LeanFind Basics Simply pre-lean, tap the LF button (Lean Find) and begin leaning. The EDM will assist you in finding the first cylinder to peak. This example is for Rich of Peak, ROP. See page 26 for a more detailed description of leaning.

  • Page 13: Section 2 - Interpreting Data

    Section 2 - Interpreting Data Operation for each Phase of Flight (Worth adding to your run-up checklist) Suggested setup:  Set engine to run-up RPM Engine Normalize view: Run-Up  Manual mode Verify:  Uniform rise of about 50°F in all EGTs in single magneto operation.
  • Page 14 After the engine is warmed up, use Lean Find to lean the mixture. Cruise Suggested setup:  Normalize view  Automatic mode Be alert for:  Uneven EGTs (injected engines). Make fine adjustments to throttle, then RPM, then mixture to level the display columns.

  • Page 15: Typical Normal Measurements

    Typical Normal Measurements The following chart lists typical normal measurement values that you will observe for most general aircraft engines. Your particular engine’s ranges may not fall within these values. Measurement Normal range Comments  under 200 HP engines EGTs in Cruise 1350°F ...
  • Page 16 Engine Diagnosis Chart The following chart will help you diagnose engine problems in your aircraft. Recommended Display Symptom Probable Action Cause TIT ~100° This is normal higher than EGTs 75° to 100° Spark plug not firing Enrich mixture EGT rise for due to fouling, faulty to return EGT to one cylinder...
  • Page 17 Symptom Probable Recommended Display Cause Action Slow rise in Burned exhaust Have compression EGT. Low valve. CHT is low checked. due to low power output. High CHT on Obstruction under Check for improper cylinders on cowling. installed baffling, one side of cowl flap engine misalignment or bird...

  • Page 18: Section 3 - Displays And Controls

    Section 3 - Displays and Controls The EDM monitors engine temperatures, pressures and voltages, assists in adjusting the fuel/air mixture, and helps diagnose engine malfunctions. There are multiple components of the user interface:  Four front panel operating buttons below the bottom of the display. ...
  • Page 19 Button  In Automatic or Manual modes, tapping the LF button will activate the Lean Find mode.  In the LF mode holding the LF button after peak EGT is found will display the peak EGT.  In Automatic or Manual modes holding the LF button for three seconds will toggle between Standard and Normalize (NRM) views.

  • Page 20: Scanner Displays

    Scanner Displays Scanner EGT and CHT Analog Bar Graph The height of each column represents a EGT or CHT or TIT (if installed) temperature. Note: when in certain modes, such as leaning or normalize, the EGT resolution will temporarily be finer. Cylinder Numbers and Index Just below the bar graph columns are numbers identifying the respective cylinder.
  • Page 21 The range of the bar graphs depends on the programming. Range, redlines and/or limits are typically set to match the original aircrafts gauge markings. The primary and non-primary (advisory) gauge sequences are configurable using the “Factory Program Mode”. EDM-900 gauge limitations cannot be user modified.

  • Page 22: Additional Displays Hobbs, Revisions, And Alarm Limits

    See ‘Section 9 - First Time Setup and Customization’. Note: Amps can operate either as a (Amps Charge) charge/discharge or (Amps Load) load meter, depending on programming. Remote Annunciate Light The remote auxiliary ‘ALERT LIGHT’ provides redundancy. Upon power up the Remote Annunciate Light displays Red and Yellow. If the RAL is not working abort the flight.

  • Page 23: Dimming The Display

    or Programmed Limits in this Instrument. Dimming the Display Automatic dimming is provided to the panel display. You can manually adjust brightness by tapping the DIM button. You will see DIM BRT. Holding DIM lowers brightness or holding BRT increase brightness. The percentage of brightness is displayed in the message area.

  • Page 24: Manual Mode

    Scan Rate 4’), however you can change this rate in the Program Mode. A setting of zero disables auto scanning altogether. The order of automatic scan if the switch is in the ALL MODE: EGT/CHT, TIT, CLD, DIFF, CDT,OIL-T, REM, T to E, GPH, USD, AMP, Volts, OIL-P, and Fuel- Some non-primary measurements can be excluded from the Automatic mode: tap STEP to enter the Manual mode.
  • Page 25 Scan Sequence Example Measurement EXAMPLE COMMENTS EGT, CHT 1354 Square indicates the cylinder being viewed 1370 TIT Turbine Inlet Temperature # 1 Shock Cooling -30 CLD Square indicates fastest cooling cylinder Compressor Discharge 300 CDT Temperature into intercooler Temperature Induction Air 125 IAT Temperature out of the intercooler...

  • Page 26: Section 5 - Lean Find

    Section 5 - Lean Find The EDM supports two methods of leaning; ROP (Rich Of Peak) and LOP (Lean Of Peak). Note: on power-up, the unit defaults to Rich Of Peak mode, but is easily changed to Lean Of Peak mode. During Rich Of Peak leaning, you’ll finalize the mixture to about 20°...
  • Page 27 The following depicts the power, mixture and temperature relationships. Best Best power economy First cylinder to peak. Use range range Last cylinder to Rich of Peak peak. Use Lean of leaning Peak leaning with GAMI injectors -100 GAMI -200 spread -300 Peak Power...
  • Page 28 The following pages provide step by step guidelines in leaning your engine, for both rich of peak and lean of peak modes: As the mixture is leaned, EGT rises to a peak temperature, and then drops as the mixture is further leaned. Peak power occurs at a mixture using more fuel than a mixture set to best economy.
  • Page 29 Rich of Peak leaning is as simple as: A. Pre-lean your mixture. B. Tap the LF button (verify ROP appears). C. Lean mixture until LEANEST flashes (peak found). D. Enrichen to the desired value ‘Rich Of Peak’. Procedure Scanner Comments Example Establish cruise at 65 to 75% power.
  • Page 30 Lean of Peak leaning is as simple as: A. Pre-lean your mixture. B. Tap the LF button (verify LOP appears). C. Lean mixture until RICHEST flashes (peak found). D. Enrichen to the desired value ‘Lean Of Peak’. Procedure Scanner Comments Example Establish cruise at 65 to 75% power.

  • Page 31: Lean Find Procedure—General Explanation

    Lean Find Procedure—General Explanation Lycoming and Continental established specific restrictions on leaning that must be followed, such as percent power, climb leaning, and TIT limits. Lycoming recommends operation at peak of EGT at 75% or less power only. Continental recommends operation at peak EGT at 65% or less power only.
  • Page 32 Column of Leanest cylinder flashes indicating the first EGT to peak. Fuel Flow will go down then up as one enriches mixture You are leaning If you want to to Rich of Peak lean Lean of Peak press button. Eventually, one cylinder will reach Leaning Rich Of Peak (ROP) Detection: peak before any of the other cylinders.
  • Page 33 Note: This mode should only be Leaning Lean Of Peak (LOP) Detection: used when your engine is equipped with balanced fuel injectors or you have a DIF value of around 80 degrees. When using the Lean of Peak mode, you lean until all EGTs decrease slightly below their respective peaks.

  • Page 34: Expanded Leaning Procedures

    Expanded Leaning Procedures During the ‘lean of peak’ process, the EDM Lean Of Peak, LOP mode: hunts for the last cylinder to peak. Ultimately, you want to have ALL cylinders operating on the lean side of peak. You will final adjust your mixture to this cylinder.

  • Page 35: Common Misapplications

    Common Misapplications Some of the more common misapplications made by first-time EDM users are presented here in an attempt to help you avoid similar problems. Problem Situation Corrective action  Follow the pre-lean Failure to pre-lean before Lean Find finds a ‘peak’...

  • Page 36: Section 6 - Fuel Flow Operation

    Section 6 - Fuel Flow Operation Fuel Management Without a means of measuring accurate fuel flow, you must rely on the aircraft fuel gauges or total time of flight. Aircraft fuel gauges are notoriously inaccurate (they are only required by the FAA to read accurately when displaying empty).

  • Page 37: Start Up Fuel

    Start Up Fuel On power-up, you will be prompted to enter any fuel you might have added to the aircraft (this process updates the REM and USD values). The EDM will flash REFUEL? . If you didn’t add any fuel, simply tap NO to quit, otherwise tap YES to pick one of the three quickset choices below: If you say YES then you will see Fuel onboard, if you have Aux tanks...

  • Page 38: Resetting 'Usd

    Resetting ‘USD’ USD is automatically reset whenever you perform REFUEL on your EDM (except if TRIP mode = yes). After filling your tanks and prior to engine start you should inform the EDM that the aircraft has been filled. In this case USD is automatically set to zero.

  • Page 39: Section 7 - Alarms

    Section 7 - Alarms Whenever a primary measured parameter falls outside of the normal allowed operating limits, i.e. goes beyond redline, the main display will blink an alert icon. This consists of the current digital value and a flashing red label in the Scanner area and the RED Remote Annunciator Light.

  • Page 40: Section 8 - Memory And Data Download

    Section 8 - Memory and Data Download The EDM compresses and records all displayed parameters once every six seconds (default) in Long Term Data Memory (note: you can change this rate to be 1 to 500 seconds). This data is retrievable by inserting a USB Drive into the jack on the front of the instrument and following the prompts.

  • Page 41: Transferring Data From The Usb Flash Drive To A Pc

    Note the adapter supplied with the Kit for a mini USB Transferring data from the USB Flash Drive to a PC To transfer your data from the USB flash drive to your PC, follow these easy steps. 1. On your PC, start the EzTrends2 program. 2.
  • Page 42 Pilot Programming Mode To start Pilot Program Mode, hold both STEP and LF buttons until you see PROGRAM for two seconds. Then tap the NEXT button to advance to the desired item in the list. Hold the NEXT button to back up in the list. Either tap NEXT until you see END.
  • Page 43 10 999 Hold NEXT and button 2 until you see HP Constant ADJUST. Tap PLUS or MINUS to adjust (%HP display will reflect changes). Hold NEXT and button 2 to save changes. -3.0  +3.0 Map Adjustment +0.0 Correct the MAP to the altimeter setting at a sea level airport ±3.0 inHg.
  • Page 44 FUEL UNITS: GAL Hold buttons Default unit is GAL. Tap CHANGE to 1 and 2 to choose a different unit. Hold buttons 1 enter the and 2 to Save the new fuel unit. change fuel units function. PLUS  MAIN TANK SIZE = In gallons or preset value.
  • Page 45 FUEL-P SENSOR = NEXT Hold NEXT and button 2 until you see ADJUST for two seconds. Tap CHANGE to adjust. Hold NEXT and button 2 to Save. PLUS  R-FACTOR CYL = 6 For the number of cylinders for your engine, double R-Factor for dual mags.

  • Page 46: Section 10 - Adjusting Manifold Pressure & %Hp

    Section 10 - Adjusting Manifold Pressure & %HP Adjusting the HP Constant for Rich of Peak Operation To fine tune the %HP readout, follow this procedure airborne between 5,000 and 8,000 feet MSL. (note: Verify that the MAP adjustment has been perform prior to this process).

  • Page 47: Adjusting The Hp Value

    Adjusting the HP Value You must set the nominal horsepower of your engine. This value is used to calculate the percent horsepower display. 1. Enter the pilot program mode by simultaneously holding the buttons for five seconds. STEP repeatedly until you see Engine HP 200 Then hold NEXT both the...

  • Page 48: Section 11 - Programming The Fuel Flow

    Section 11 - Programming the Fuel Flow Fuel Flow Parameters Three additional parameters may be set by the pilot when the Fuel Flow Option is installed:  K Factor—the fuel flow transducer calibration constant.  Accumulate—default is OFF: resets the fuel used to 0 every time you inform the EDM that the aircraft was refueled.
  • Page 49 1. Make at least three flights of about two to three hours each. Note the actual fuel used (as determined by topping the tanks) and the EDM calculation of the fuel consumed for each flight = USD. Fuel USED shown by EDM Flight (total tank - REM) Actual fuel used by topping...
  • Page 50 2. Hold both the STEP and LF buttons for a few seconds until the first digit flashes (shown here as a larger digit for illustration purposes): 9.00 3. Tap or hold the LF button to change flashing digit: 9.00 4. Tap STEP button to move to next digit: 1 5.

  • Page 51: Programming Trip Mode

    Programming Trip Mode Trip Mode keeps a running total of fuel used (USD) for all flights. If Trip Mode = No, fuel ‘USD’ is zeroed after updating the EDM’s fuel computer via Refuel modes. NOTE: to clear the fuel used display at any time, tap STEP until you see USD.
  • Page 52 Page 52 Engine Data Management...

  • Page 53: Troubleshooting The Edm

    Troubleshooting the EDM Diagnostic Testing on Startup and During Flight When your EDM is first turned on, it tests internal components, calibration and integrity of the probes. Most alarms are disabled until the engine has been started. During flight, probes are constantly checked for inconsistent or intermittent signals.
  • Page 54 Calibration error. Return unit to factory. NO 2.5V Power down the instrument and power up again. PWR DWN Transient warning messages. If they persistently WARNCAL, WARNCFG occur, return the unit to JPI for repair. HOBSERR The time of the most recent flight may not be reflected in the HOBBS meter.

  • Page 55: Section 12 - Appendices

    Section 12 - Appendices Shock Cooling (CLD) Cooling the cylinders too fast can result in cracking and eventual failure. Fuel Mixture Lycoming Service Instruction 1094D (March 25, 1994) on Leaning Procedures states: “At all times, caution must be taken not to shock cool the cylinders. The maximum recommended temperature change from Lycoming should not exceed 50°F per minute cooling rate.”...
  • Page 56 'Normal' Scanner Data Download Messages List of ALL Messages ====================== messages in EDM- ==================== DOWNLOAD: NEW EGT 1494 CHT 332 DOWNLOAD: ALL Startup Banner OIL-T 195 °F DOWNLOAD: EXIT Messages VOLTS 27.4 ===================== T to E 00:04 H:M Pilot Program Messages EDM900 CLD 0 °...

  • Page 57: Navigation Data Formats

    Navigation Data Formats Output of GPS; input to EDM. The EDM automatically configures itself for one of three industry standard data formats: Format Baud NMEA-183 This is the format for most handheld GPS receivers. Loran (Marine Nav 4,800 must have sentences RMA & RMB. GPS must have Data Format) sentences RMB &...

  • Page 58: Section 13 - Technical Support

    Limited Warranty J.P. Instruments Inc. (JPI) warrants all parts in your new EDM to be free from defects in material and workmanship under normal use. Our obligation under this warranty is limited to repair or exchange of any defective part of this unit if the part is returned, shipping prepaid, within three years for electronics and one year for probes from the date of original purchase.
  • Page 59 EDM Quick Reference Guide display indicator, 19 OAT, 39 Change button, 17 * Pre-leaning procedure:, 29 too high or too low, 16 Climb, 12 Compression, 16 Accumulate, 45 low, 15 total, 35 Compressor discharge Adjusting temperature, CDT, 23 K-factor, 42 Cowling, obstruction, 16 Alarm limits, 9, 36 Cruise, 13...
  • Page 60 EDM Quick Reference Guide too high, 15, 32 too low, 15, 32 Eliminate measurements, 23 H.S, 24 Engine Hastaloy, 31 diagnosis chart, 15 History limits, normal, 14 display, 55 run-up, 12 Hobbs, 18 Error messages, 47 display, 21 Exclude measurements, 23 Holding a button, 17 Exhaust leak, 16 Horsepower...
  • Page 61 EDM Quick Reference Guide LF. See LeanFind Pilot programming Long Term Memory fuel flow option, 42 operation, 37 Power, best, 25 Primary preset alarm limits, 4 Product support, 51 Programming Manual mode, 23 fuel flow option, 42 calibration, 40, 41 display, 9 Miles per gallon, 24 RAD, 8...
  • Page 62 EDM Quick Reference Guide Trouibleshooting diagnostics, 47 fuel flow, 47 fuel, 6, 34 Turbocharged Engines, 31 Stuck valve, 15 Switch, select, 35 Uniform, CHT, EGT not, 15 USD, 24 Tachometer. See RPM Take-off, 12 Tapping a button, 17 Technical support, 51 Test, self, 47 Valve Time to empty, 24...

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