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J.P. Instruments EDM-930 Primary TSO Pilot's Manual

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Pilot's Guide
Engine Data Management
EDM-930
Primary
Copyright  2010 J.P. Instruments, Inc.
J.P. INSTRUMENTS INC.
Information: P. O. Box 7033
Huntington Beach, CA 92646
Factory: 3185 B Airway
Costa Mesa, CA 92626
(714) 557-5434
www.jpinstruments.com
Printed in the United States of America
Last printed 5/14/2013 9:17:00 AM
TSO
All Rights Reserved
Fax (714) 557-9840
Rev I 10-12

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  • Page 1 Pilot’s Guide Engine Data Management EDM-930 Primary Copyright  2010 J.P. Instruments, Inc. All Rights Reserved J.P. INSTRUMENTS INC. Information: P. O. Box 7033 Huntington Beach, CA 92646 Factory: 3185 B Airway Costa Mesa, CA 92626 (714) 557-5434 Fax (714) 557-9840 www.jpinstruments.com...

  • Page 2: Table Of Contents

    Table of Contents Section 1 - Getting Started Display View Angle List of abbreviations and acronyms Fuel Flow Computer Basics Control Button Basics Display Screen Basics Remote Auxiliary Display Basics RPM and MAP Display Basics Linear Bar Graph Display Basics Scanner®...
  • Page 3 Section 9 - First Time Setup and Customization Pilot Programming Mode Adjusting the HP Constant for Rich of Peak Operation Adjusting the MAP Adjusting the HP Value Fuel Flow K factor Programming Trip Mode Setting the GPS Com Format Section 10 - Custom Key Card Section 11 - Setting Fuel Calibration Points...
  • Page 4 EDM-930 SYSTEM DISPLAYS EDM-930 Main display Remote Auxiliary Display (RAD)
  • Page 5 Product Features  Hands-free, automatic scanning  LeanFind 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 6: Getting Started

    Section 1 - Getting Started Important Note! You must have the remote auxiliary display—RAD— installed on the instrument panel of your aircraft. This is required for FAA certification of the EDM-930 as a primary instrument. Upon start up, the RAD displays the make and model of you aircraft, which must be verified before you can rely on the EDM-930 for use as the primary engine instrument cluster.

  • Page 7: Display View Angle

    Display View Angle The best view angle for the pilot is in the horizontal mode with the buttons on the bottom. The best Portrait mode is with the buttons on the right. View angles are per the table below: Horizontal Left 65 Degrees Viewing...

  • Page 8: List Of Abbreviations And Acronyms

    List of abbreviations and acronyms Message Area Gauge Function Alarm Abbreviation Primary Primary Fuel Flow Engine rotational speed RPM xxxx Compute Engine Manifold Pressure MAP xx.x in hg r Basics Engine Cylinder Head Temp CHT2 xxx The fuel Engine Oil Temperature O-T xxx flow Engine Oil Pressure...

  • Page 9: Control Button Basics

    3. Adjust? 0.0 GAL: Partial fuel added to existing quantity. See page 29 for expanded information on the refueling process. Control Button Basics Four operating buttons control all functions of the EDM. These buttons change labels depending on the current state of the EDM.. The term tap is used to denote pressing a button momentarily.

  • Page 10: Remote Auxiliary Display Basics

    Remote Auxiliary Display Basics The Remote Alarm Display ‘RAD’ provides alarm display, RPM and MAP, and is located directly in front of the pilot. Upon power up, the RAD shows the Aircraft model, engine type and declares instrument status: ‘Primary’ (if applicable). Before each flight, confirm that it matches your aircraft requirements.

  • Page 11: Scanner® Display Basics

    Scanner® Display Basics The EDM Scanner section is located in the lower left area of the screen. It consists of a graphical display of EGT and CHT (and TIT if so equipped) and a digital display that automatically scans the various parameters.

  • Page 12: Interpreting Data

    the correct value for EGT difference rich of peak operation at 75% and 65% 7. You can also see what the peak EGT was by holding the PEAK button. 8. Tap to exit the Lean Find Mode. STEP Section 2 - Interpreting Data Operation for each Phase of Flight (worth adding to your run-up checklist) Suggested setup:...
  • Page 13 Suggested setup:  Standard view  Automatic mode Take-Off, Verify: Climb, and  EGTs and CHTs consistent with past climbs. EGTs Full should be in the 1100 to 1300°F range (100° to 300°F Throttle cooler than cruise) due to fuel cooling. Operations Be alert for: ...

  • Page 14: 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 15 Engine Diagnosis Chart The following chart will help you diagnose engine problems in your aircraft. Display Symptom Probable Cause Recommended Action TIT ~100° This is normal higher than EGTs 75° to 100° Spark plug not firing Enrich mixture to EGT rise for due to fouling, faulty return EGT to one cylinder...
  • Page 16 Display Symptom Probable Cause Recommended 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 17: 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 18 Button  In Automatic or Manual modes, tapping the button will activate the LeanFind mode.  In the LF mode holding the button after peak EGT is found will display the peak EGT.  In Automatic or Manual modes holding the button for three seconds will toggle between Standard and Normalize (NRM) views.

  • Page 19: Rpm And Map Displays

    RPM and MAP Displays The upper left side of the display shows RPM above the MAP. The arcs represent the analog values. Percent horsepower is shown to the lower left of MAP. % HP Scanner Displays Scanner EGT and CHT Analog Bar Graph The height of each column represents a EGT or CHT or TIT (if installed) temperature.
  • Page 20 Normalize / Standard View To toggle between Standard and the Normalize views, hold the LF button for three seconds until the NRM icon toggles on or off. Note: Normalize cannot be activated while in Lean Find mode.  Standard view (when the NRM icon is not lighted): the EGT represent absolute temperature.
  • Page 21 Linear Bar Graph Displays The linear bar graphs are arranged in a three by three matrix on the right half of the display. A typical layout is depicted here (Note: your actual configuration may vary). Typical functions that can be displayed are: ...

  • Page 22: Remote Auxiliary Display

    Remote Auxiliary Display See the important note on page 1 regarding the RAD. The remote auxiliary display ‘RAD’ provides redundancy and allows positioning a smaller display directly in front of the pilot. Upon power up the RAD displays the EDM’s programmed configuration (aircraft make and model and primary status).

  • Page 23: Operating Modes

    Section 4 - Operating Modes The EDM has four basic operating modes: Automatic, Manual, Program and LeanFind. LeanFind is described in the next section; Program mode is described on page 38, ‘First Time Setup and Customization’. When you first turn on the power the EDM starts in the Manual mode, but will enter the Automatic mode after a few minutes.

  • Page 24: Manual Mode

    Manual Mode To activate Manual Mode, just tap the button. Use the Manual STEP mode when you want to lock on one specific measurement such as shock cooling during descent, or your hottest CHT during climbs. To select the desired parameter, tap the button until it appears.

  • Page 25: Leanfind

    Section 5 - LeanFind 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 traditional Rich Of Peak leaning, you’ll finalize the mixture to about 20°...
  • Page 26 The illustration below shows the various relationships between the mixture, fuel flow and engine power: 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...
  • Page 27 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 Example Comments Establish cruise at 65 to 75% power.
  • Page 28 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 Example Comments Establish cruise at 65 to 75% power.

  • Page 29: Leanfind Procedure-General Explanation

    LeanFind 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 30 Lean Find-Activation: When a 15° EGT rise occurs, LeanFind activates (indicated by a cylinder I.D. box flashing over the number of the hottest EGT). Remember: The LeanFind mode is not active until a cylinder I.D. box is flashing. To show the progress of the leaning process, the EDM now displays the hottest EGT in the left side of the digital display and the fuel flow in the right side.
  • Page 31 Lean Find-Rich Of Peak Detection: Eventually, one cylinder will reach peak before any of the other cylinders. The EDM will determine this automatically. The EDM will indicate success in finding a peak by displaying the word for two seconds and flashing its LEANEST corresponding Cylinder I.D.
  • Page 32 Lean Find-Lean Of Peak Detection: Note: This mode should only be used when your engine is equipped with balanced fuel injectors. When using the Lean of Peak mode, you lean until all EGT’s decrease slightly below their respective peaks. The EDM has automatic peak detection and will sequentially indicate leaning progress.

  • Page 33: Expanded Leaning Procedures

    Expanded Leaning Procedures Lean Of Peak mode: During the ‘lean of peak’ process, the EDM 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 34: 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 35: 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 to quit, otherwise tap to pick one of the three quickset choices EXIT...
  • Page 36 Example A: Aircraft has two fuel tanks with internal tabs. You’ve preset: ‘MAIN = 66’ (33 + 33 usable) ‘AUX = 16’ (8 + 8 usable) When you refuel: ‘MAIN 66.0 GAL’: use this shortcut when filling to the internal tank tabs.
  • Page 37 Example B: Aircraft has two MAIN and two AUX tanks. You’ve preset: ‘MAIN = 60’ (30 + 30 usable) ‘AUX = 14’ (7 + 7 usable) When you refuel: ‘MAIN 60 GAL’: use this shortcut when filling only MAIN tanks (! AUX tanks must be empty).

  • Page 38: Resetting 'Usd

    Example C: Aircraft has two MAIN tanks. When you partially refuel, use: ‘Adjust? + 0.0 GAL’: use this to add the amount of fuel you pumped into the aircraft (it doesn’t matter which tanks you added to - the EDM totalizes ALL onboard usable fuel).

  • Page 39: 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 40: Alarms

    Section 7 - Alarms Whenever a 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 RAD. For example, if CHT 2 is at 480, and redline is 460, the alert would be displayed as 480 HI CHT2.

  • Page 41: 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 2 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 42: Downloading Data From The Edm

    Downloading Data from the EDM Downloading is a simple process. Follow the steps below: a. With the EDM powered up, plug the USB flash drive into the EDM USB port. b. Wait for the EDM display to show DOWNLOAD: NEW. c.
  • Page 43 Section 9 - First Time Setup and Customization Your EDM comes with most settings programmed. However some settings you will fine tune to your installation and/or preferences. We recommend you perform the following minimum set up: 1. Pilot Programming Mode: ...
  • Page 44 calibration data is sensible, correct and useable. Note: Please refer to the installation manual for accessing fuel tables and calibration on page 22 item 24.4.  Enter the data by putting the EDM into ‘Fuel Table Data’ mode and enter your values into each tanks chart. For Your Safe Flight Page 39...
  • Page 45 Pilot Programming Mode To start Pilot Program Mode, hold both buttons until you STEP 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 until you see END? Yes and then tap list.
  • Page 46 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. Engine Constant = 14.9 1  99.9 Hold NEXT and button until you see ADJUST.
  • Page 47 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. 1. Enter the pilot program mode by simultaneously holding the STEP buttons for five seconds. repeatedly until you see HP Constants.
  • Page 48 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 STEP buttons for five seconds. repeatedly until you see Engine HP 200 Then hold both NEXT and Button 2 until you see ADJUST momentarily.
  • Page 49 1. Record data for three flights of about two to three hours each. Record the actual fuel used for each flight (total pumped to top the tanks) and the EDM USD value prior to shutting down after the flight. ACTUAL USED (Total pumped to top used EDM ‘USD’...
  • Page 50 Entering the K factor This process is used to enter/modify the K factor value in the EDM. 1. Enter the pilot program mode by simultaneously holding the STEP buttons for five seconds until you see PROGRAM MODE. repeatedly until you see K-Factor 1 29.90 . 2.
  • Page 51 Setting the GPS Com Format This process allows you to select what GPS communication format the EDM should use when sending fuel flow data to the GPS. See table below with the numeric GPS-C values and their corresponding formats. 1. Enter the pilot program mode by simultaneously holding the STEP buttons for five seconds.
  • Page 52 Section 11 - Setting Fuel Calibration Points WARNING:  Never add or remove fuel from the aircraft when the master switch is turned on.  Fuel quantity gauge performance is affected by many factors, such as the integrity of the sensor performance, the accuracy of the calibration data you collected and entered and most importantly your validation that the EDM fuel quantity gauge is accurate and repeatable after installation and calibration.
  • Page 53 Capturing the sender reading at each calibration point: Getting Started…Collecting Fuel Level Calibration Data using the EDM as a meter. 1. With power off, hold in Button 4 (Button 1 being far left) and then turn on power. For each EDM monitored tank, create a paper table with the desired number of calibration points (2 to 5) and at what volume each will be.
  • Page 54 After you have collected your data After you have collected your data…Entering / Editing Fuel Level Calibration Data The Fuel Table Editor is a spreadsheet type format allowing you to easily see the volume and related calibration values side by side. You can easily navigate through the cells to enter values.
  • Page 55 3. Tap USER when you see ‘Do you want to restore user table?’ Note: tapping FACTORY causes the fuel table stored on the Key Card to over-write any previous user entries in the fuel table. Use FACTORY if you want to start from the original factory default. 4.
  • Page 56 5. You see ‘Points in LEFT’, the current calibration points for the LEFT tank. 6. Tap/hold VALUE to change to the desired number of calibration points for this tank (2 to 5). Each Tank can have a different set of calibration points.
  • Page 57 9. Tap/hold STEP to select the cell you want to edit. Tap EDIT to change the value. Tap SAVE to record it. Follow the on-screen menus to edit the value. Keep tapping DIGIT to move it across. 10. Repeat previous step until all tanks data have been entered. 11.
  • Page 58 Troubleshooting the EDM Common Misapplications Problem Situation Correction A power transient Recycle the power to the Display freezes or may could cause the processors to be incorrect malfunction Failure to pre-lean Continue to lean without LeanFind finds a before performing stopping LeanFind or stopping “peak”...
  • Page 59 Diagnostic Messages The following displays indicate malfunctions in the system: Startup and Operational Diagnostics 0.0 GPH Zero’s indicate Fuel flow is too low to register --- GPH Dashes indicate No fuel flow transducer signals --- H.M Dashes indicate No fuel flow transducer signals Open probe.
  • Page 60 GPS Interface Diagnostics Measurements ‘xxx No communications from GPS receiver REQ’, ‘xxx RES’ and ‘xxx MPG’ are all to EDM. Possibly no connection or missing from the scan. aircraft GPS is off. message and Communications are received by EDM NO - COM ‘xxx REQ’, ‘xxx RES’...
  • Page 61 Section 12 - Appendices TSO-only differences from Primary Instruments TSO-only models have the following differences from the Primary models.  If multiple alarms occur simultaneously, the higher priority alarm will temporarily “mask” the lower priority alarm(s). When an alarm occurs, tap the Clear button to clear the alarm indication so that you will be notified of any other alarm that might have occurred.
  • Page 62  JPI Hastaloy-X probes may read as much as 100°F higher than the factory installed TIT probe. However, note that the engine was certified with the factory-installed TIT probe and gauge, and this gauge reading is the limiting factor when adjusting your engine.
  • Page 63 Rear Apron Connector Locations For Your Safe Flight Page 58...
  • Page 64 Connector pin assignments ( for 4 / 6 cyl engine) ( MAP, RPM, OIL-P) Pin # Function Pin # Function yel 1 red 2 OIL T grn 1 RPM sig (1) yel 3 red 4 blk 2 RPM gnd (2) yel 5 red 6 CARB T...
  • Page 65 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 66 Web: www.jpinstruments.com or www.JPITech.com 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 overhaul 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 67 Index ice, 8 temperature, 17 Celsius display indicator, 13 * Pre-leaning procedure:, 22 OAT, 36 Change button, 11 Accumulate, 41 too high or too low, 9 total, 31 Climb, 6 Alarm Compression, 9 priority, 32 low, 8 Alarm limits, 3, 32 Compressor discharge temperature, display, 11 CDT, 17...
  • Page 68 select switch, 31 too high, 8, 46 data formats, 53 too low, 8, 46 data ports, 53 Eliminate measurements, 16 interface diagnostics, 48 Engine diagnosis chart, 8 limits, normal, 7 run-up, 5 H.S, 17 Error messages, 46 Hastaloy, 25, 50 Exclude measurements, 16 History Exhaust leak, 9...
  • Page 69 Leanest cylinder, 20, 21 LeanFind button, 11 Peak EGT, 22 procedure, 4, 18 PEAK EGT, 20, 21, 23 Leaning Pin assignments by TIT, 25 connectors, 51 too quickly, 46 Primary, 1 LF. See LeanFind preset alarm limits, 1, 42 Long Term Memory Priority operation, 33 alarm, 32...
  • Page 70 fouling, 5, 8 GPS, 48 instrument, 46 Standard view, 13 Startup Trouibleshooting diagnostics, 46 fuel flow, 47 fuel, 2, 27 TSO-only models, 49 Turbocharged Engines, 25 Stuck valve, 8 Switch, select, 31 Uniform, CHT, EGT not, 8 Tachometer. See RPM USD, 17 Take-off, 6 Tapping a button, 2, 10...
  • Page 71 QUICK REFERENCE Automatic Scan Display Hobbs Hold the buttons STEP simultaneously. Download Data in Memory Exclude Measurement in Automatic Scan (toggle) Insert USB Flash Drive into to index to the STEP front USB port on EDM. measurement to exclude. (latest DOWNLOAD: NEW Tap both STEP...
  • Page 72 QUICK REFERENCE Refueled the Aircraft Leaning Rich of Peak Pre-lean & wait 20 seconds. & see Power Program Lean until LEANEST flashes, Mode then 1485 12.7 appear. to see degrees lean of REFUEL? REFUEL? peak: 12.7 EGT- Enrich back to rich side of EXIT REFUEL NEXT...

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