J.P. Instruments EDM-730 Pilot's Manual
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J.P. Instruments EDM-730 Pilot's Manual

Engine data management
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Pilot's Guide
Engine Data Management
EDM-730
EDM-830
EDM-740
Copyright  2000-2010 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
PH: (714) 557-5434
PH: (800) 345-4574
FX: (714) 557-9840
www.jpinstruments.com
www.jpitech.com
Support@jpitech.com
Printed in the United States of America
For Your Safe Flight
EXPERIMENTAL
All Rights Reserved
Rev C June 1 2010
Last printed 3/11/2011 8:44:00 AM
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  • Page 1 Pilot’s Guide Engine Data Management EDM-730 EDM-830 EDM-740 EXPERIMENTAL Copyright  2000-2010 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 PH: (714) 557-5434...

  • Page 2: Table Of Contents

    Displays and Controls Typical EDM-830-6C Cylinder Display Typical display configurations by model and mounting orientation 12 EDM-830 RPM and MAP Display EDM-730/830 Linear Gauges EDM-730/830 Basic Scanner® Operation Operating Modes Button Location and Display Rotation Scanner® Information Area Section 2 -...
  • Page 3 Section 6 - Personalizing Pilot Programming Section 7 - Programming Horsepower Constant Section 8 - Programming Manifold Pressure (MAP) Section 9 - Programming use of Factory Original TIT Probe Section 10 - Programming the Fuel Flow Option Section 11 - Programming Long Term Data Memory Section 12 - Factory Limits and GPS...
  • Page 4 The following is a quick reference of basic operation tap STEP and LF tap STEP button simultaneously Toggles to AUTO MODE: MANUAL MODE: include/exclude parameters Parameters parameter in automatically manually indexed AUTO MODE indexed by tapping STEP tap LF, then tap STEP release buttons indexing LEAN FIND:...

  • Page 5: Section 1 - Introduction

    Section 1 - Introduction Product Features  indicates standard feature   Hands-free, automatic scanning   All programming done from the Front Panel   LeanFind finds the first and last cylinder to peak with true peak detect—eliminates a false peaks ...

  • Page 6: Engine Data Management

    Engine Data Management The EDM Engine Data Management system is the most advanced and accurate piston engine-monitoring instrument on the market. Using the latest microprocessor technology, the EDM will monitor up to twenty- four critical parameters in your engine, four times a second, with a linearized thermocouple accuracy of better than 0.1 percent or 2 F°.
  • Page 7 The following depicts the power, mixture and temperature relationships. Best Best power economy Last cylinder to range range peak. Use for LOP Lean of Peak leaning GAMI spread First cylinder to peak. Use for ROP Rich of Peak leaning Peak Power Full Rich Lean Rich...

  • Page 8: Displays And Controls

    Displays and Controls The EDM monitors engine temperatures and voltages, assists in adjusting the fuel/air mixture, and helps diagnose engine malfunctions. There are three components of the user interface:  Analog display including cylinder number and cylinder I.D. box  Digital display for numeric readouts and messages ...
  • Page 9 The following is a description of various display areas. Numbers in circles refer to features in the above diagram. Normalize View and Percentage View  Percentage View: when the EGT normalize indicator ‘NRM’ is not lit, the columns indicate percent of EGT red line. Each column is composed of a stack of segments.
  • Page 10 Temperature Units (°F or °C) The EDM series engine temps can be set for either degrees Fahrenheit °F or degrees Celsius °C. Note: OAT units can be set independently of the engine temps. To change the display of engine temperatures see “Changing the Alarm Limits”...
  • Page 11 TIT Bargraph The EDM provides a bargraph display of the hottest TIT and continuously checks for exceedance of the redline temp. Once redline is reached, the bargraph will change to red and an alert will flash in the Scanner® Information Area. Linear Gauges The Linear gauges provide both digital and analog indications for various parameters.

  • Page 12: Typical Display Configurations By Model And Mounting Orientation

    Typical display configurations by model and mounting orientation The EDM-730/830 series features the ability to be mounted either in landscape or portrait orientation. Display layouts will differ as a result of configuration differences. You may examples of the EDM-830 and...

  • Page 13: Edm-830 Rpm And Map Display

    EDM-830 RPM & MAP (landscape orientation) EDM-830 RPM & MAP (portrait orientation) EDM-730/830 Linear Gauges This area contains linear bar graphs with digital displays. When a value exceeds red line, it is displayed in RED. You can customize what appears in each position.

  • Page 14: Edm-730/830 Basic Scanner® Operation

    EDM-730/830 Basic Scanner® Operation The EDM-730/830 Scanner section contains graphic representation of EGT, CHT and TIT values as well as containing a general purpose text message area. It will go into Automatic scan mode a few minutes after power up. You don’t have to touch any buttons.

  • Page 15: Operating Modes

    TIT: Turbine Inlet Temperature Light Blue segments represent temperature magnitude (at the same scale as EGT) and are located to the right of the last cylinder bar graph set. A ‘T’ just below the dotted line identifies this as TIT. When a white square surrounds the ‘T’, this signifies that the scanner digital values relate to TIT.

  • Page 16: Button Location And Display Rotation

    Button Location and Display Rotation The EDM can be mounted in four different positions. After mounting, you may need to remove and relocate the white button to the ‘STEP’ location. You may also need to rotate the EDM display. Clear any alarms and hold STEP (about 6 seconds) until you see the overlayed arrow.
  • Page 17 The STEP and LF buttons control all functions of the EDM. The term tap denotes pressing a button momentarily. The term hold denotes pressing and holding a button for five seconds or longer. STEP Button - Primary functions  In the Automatic mode, tapping the STEP button will change to the Manual mode.
  • Page 18 LF Button - Secondary functions  In the pilot programming procedure, holding or tapping the LF button is used to increment or decrement parameter values and toggle between Yes and No answers to questions. STEP and LF buttons together  Holding both the STEP and LF buttons simultaneously, for several seconds, changes to the Pilot Programming Mode.

  • Page 19: Scanner® Information Area

    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’...

  • Page 20: Section 2 - Operating Procedures

    Section 2 - Operating Procedures Built-in Diagnostics: Startup and During Flight When your EDM is first turned on, the screen begins by showing the unit model number and TSO category. Next, several display patterns are presented allowing you to check for proper screen operation. During this time, the EDM is conducting built-in-tests of certain components, calibration and probes.

  • Page 21: Manual Mode

    Individual parameters can be excluded from the Automatic mode: tap STEP to enter the Manual mode. Tap STEP to select the parameter you want to exclude. Now tap both STEP and LF buttons simultaneously. Note that tapping the STEP and LF buttons again, toggles back to include status.

  • Page 22: Leanfind Mode

    LeanFind Mode The EDM supports two methods of leaning; Rich Of Peak (ROP) and Lean Of Peak (LOP). Note: you can set the power-up default to LOP or ROP in the Pilot Program Mode but easily change modes during flight. During traditional Rich Of Peak leaning, you’ll finalize the mixture to about 20 to 80°...
  • Page 23 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 24 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 between 65 to 75%...

  • Page 25: Leanfind Procedure-General Explanation

    LeanFind Procedure—General Explanation Lycoming and Continental engines have established specific restrictions on leaning that must be followed, such as percentage of power, climb leaning, and TIT limits. Lycoming recommends operation at peak EGT for power settings of 75% or lower, while Continental recommends operation at peak EGT for power settings of 65% or lower.
  • Page 26 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 the peaked LEANEST EGT column.
  • Page 27 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 28: 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. This is because, ultimately, you want to have ALL cylinders operating on the lean side of peak. You will final adjust your mixture to this cylinder.

  • Page 29: Operation For Each Phase Of Flight

    Operation for each Phase of Flight Engine Run Up - while RPM is set to run-up value Suggested setup: Verify:  uniform rise of about 50°F in all EGTs in single Normalize view magneto operation Manual mode  uniform rise of EGTs with application of the mixture control.

  • Page 30: Shock Cooling

    Cruise - engine stabilized & leaned using LeanFind Suggested setup: Be alert for:  uneven EGTs or CHTs (carbureted engines). Percentage view Make fine adjustments to throttle, then RPM, Automatic mode then mixture to level the display columns.  abnormal patterns of EGTs and CHT. (see “Diagnosing Engine Problems”...

  • Page 31: 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 LeanFind finds a performing LeanFind or ‘peak’...

  • Page 32: Section 3 - Diagnosing Engine Problems

    Section 3 - Diagnosing Engine Problems This chart lists typical EDM indications for most G.A. engines. Parameter Normal range Comments  1200 to 1300°F EGT is approximately EGT at Takeoff 200°F lower than cruise when full throttle applied.  1350°F under 200 HP EGT in Cruise ...

  • Page 33: Engine Diagnosis Chart

    Engine Diagnosis Chart The following chart will help you diagnose engine problems in your aircraft (unit is in ‘Percentage View’ mode for these pictures). Display Symptom Probable Cause Recommended Action 75° to 100° EGT Spark plug not firing Enrich mixture to rise for one due to fouling, faulty return EGT to normal.
  • Page 34 Display Symptom Probable Cause Recommended Action EGT and CHT Dirty fuel injectors or Check injectors and not uniform fouled plugs. plugs. Non-uniformity is normal for carbureted engines Decrease in Decrease in airflow Check for change in EGT for all into the induction manifold pressure.

  • Page 35: Alarms

    Display Symptom Probable Cause Recommended Action Loss of peak Poor ignition or vapor Have magneto tested. (no picture) in fuel injection system. Decrease in Detonation. Usually Enrich mixture, (no picture) peak or flat EGT the result of 80 reduce power and re- response to Octane fuel in 100 lean mixture.

  • Page 36: Alarm Priority

    When an alarm is displayed, tapping the STEP button will temporarily disable the alarm digital indication for the next ten minutes. When an alarm is displayed, holding the STEP button until the word OFF appears will disable that alarm digital indication for the remainder of the flight.

  • Page 37: Section 4 - Fuel Flow Option Operation

    Pre-ignition is caused by hot spots in the cylinder. Ignition occurs prior to the spark plug firing. The EDM depicts pre-ignition as a sudden red line of the EGT on the analog display. This may occur in one or more cylinders.

  • Page 38: 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 REMaining and USED values). The EDM will display FUEL for one second, and then flash FILL? N. If you didn’t add any fuel, simply tap STEP to exit, otherwise tap LF and pick one of the three choices below: Choice 1) FILL 66 : This shortcut sets REMaining to the MAIN tank value (you preset MAIN in Factory Limits setup).
  • Page 39 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: ‘FILL 66’: use this shortcut when filling to the internal tank tabs. ‘FILL 82’: use this shortcut when filling to the caps.
  • Page 40 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: ‘FILL 60’: use this shortcut when filling only MAIN tanks (! AUX tanks must be empty).
  • Page 41 Example C: Aircraft has two MAIN tanks. When you partially refuel, use: ‘FILL +’: 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). In this example you will add ‘+ 14.0 GAL’, the same as your fuel slip reads.

  • Page 42: Resetting 'Used

    Resetting ‘USED’ Every time you inform the EDM that the aircraft is refueled, the amount of fuel USED is automatically set to zero (unless the instrument is programmed to ACCUM? Y ). To manually zero the amount of fuel USED at any time, manually STEP to display USED and then hold both buttons until the display shows ‘0 USED’...
  • Page 43 Scanner Parameter Example Table Switch Parameter Example Comments T, A Battery voltage Voltage, System Bus 14.2 BAT T, A Outside Air Temp 81 OAT °F or °C T, A Induction Air Temp 125 IAT Out of intercooler T, A Compressor Discharge 300 CDT Out of compressor Temp...

  • Page 44: Section 5 - Long Term Data Memory

    Section 5 - Long Term Data Memory CAUTION: Do not insert anything but a USB Flash Drive Stick in the USB Port! The EDM compresses and records all displayed parameters once every six seconds in Long Term Data Memory (note: you can change this rate to be 2 to 500 seconds).

  • Page 45: Transferring From The Usb Flash Drive To A Pc

    The EDM will show messages and percent complete indicators to keep you apprised of progress. When the download is complete the EDM may briefly show . Wait a few seconds for the display to return to the DONE normal engine monitoring mode and then remove your USB Drive. This completes the download.
  • Page 46 N  Y ORIG T ?N Select Y if original ship TIT is being used. Tap STEP to accept. If Y chosen, then TIT is calibrated below. TIT +0 TIT +300 Adjust TIT to match ships gauge during flight. TIT -300 Tap STEP to accept and exit PPM.

  • Page 47: Section 7 - Programming Horsepower Constant

    Section 7 - Programming Horsepower Constant For EDM’s equipped with FF, RPM, OAT and MAP, you will adjust the HP Constant once for your aircraft (NOTE: perform MAP adjustment prior to this process) Follow the steps below: 1. Prior to takeoff, with the engine running, enter Pilot Program Mode (hold STEP and LF until ‘PROGRAM’...

  • Page 48: Section 9 - Programming Use Of Factory Original Tit Probe

    window if no ATIS available) by tapping/holding the LF button. The range is +/- 3 in HG. B. Airport above sea level: the table below shows MAP for a given field elevation (down the left side of the table) and altimeter setting (along top row of the table).

  • Page 49: Section 10 - Programming The Fuel Flow Option

    RATE 4 hold STEP and LF buttons simultaneously for several seconds to access the next sequence. N  Y ORIG T ?N Y—Yes—selects factory original TIT probe and proceeds to the next step. TIT +0 - 975 … + 975 Tap the LF button to lower the correction;...
  • Page 50 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 tanks...

  • Page 51: Section 11 - Programming Long Term Data Memory

    6. Tap STEP button for next digit: 18. 7. Repeat items 5 and 6 for the remaining two digits. 8. Hold STEP and LF buttons until the parameter is saved. Accumulate Total—Trip Total Select this from the Pilot Program Mode. Select ‘N’ if you wish to display total fuel used since the last time you informed the EDM that the aircraft was refueled.

  • Page 52: Section 12 - Factory Limits And Gps

    STEP Comments Record time interval, in seconds TIME: … Month MNTH: … DAY: … YEAR: Year (note: represents 00 through … 24 hour time. We suggest you use Zulu time HOUR: … MIN: This also zeros the seconds … N----- Current Aircraft ID.
  • Page 53 The display will then sequence similar to the example chart below. Tap the STEP button to advance to the next item in the list. Tap the LF button to select values for that item. Hold the LF button to increase a numerical value;...
  • Page 54 GAL  FUEL GAL Selects the units in all KGS  parameters where fuel quantity or fuel rate is LTR  displayed LBS  Main tank capacity, in MAIN=50 0 … 999 units selected N  Y AUX? N Y—Yes—aircraft has auxiliary tanks Auxiliary tank capacity AUX=0...

  • Page 55: Map, Fuel Flow Alarm Limits, Units, Fuel Capacity

    MAP, Fuel Flow Alarm Limits, Units, Fuel Capacity MAP Overboost Alarm Enter the redline for overboost on turbocharged engines. Fuel Flow Units (shaded area above) Selects the units in all measurements where fuel quantity or fuel rate is displayed. If you change this parameter, it does not change the numerical value of the fuel tank capacity.
  • Page 56 Number of Cylinders This affects only RPM capable EDMs. Set CYL = 4 or 6 depending on your engine. Exceptions:  4 cylinder engine with dual (all-in-one) magnetos set to CYL= 8.  4 cylinder Lasar® ignition set to CYL=8. ...

  • Page 57: Navigation Gps Data Formats

    Navigation GPS Data Formats GPS radios communicate with other equipment in various formats to suite intended usage. You will need to determine what GPS mode is best suited for your installation and set up both your GPS and EDM for compatibility.

  • Page 58: Navigation Data Ports For Gps Communication

    Diagnostic Messages for Fuel Flow and GPS The following tables depict various messages you may see when a malfunction or signal problem exists: Fuel Flow Transducer Diagnostics 0.0 GPH Zeros indicate fuel flow signal is too low to register. 0.0 FF ‘FF’...

  • Page 59: Section 13 - Options Connector Pin Assignments

    Fuel Data input to GPS (an output from the EDM) RS-232 Serial data format: 8 bit data, 1 start bit, no parity. Baud rate: 9,600. EDM Output format is normally fixed by the GPS-C number you chose, but may be over-ridden when the EDM auto-senses certain incoming GPS navigation formats.

  • Page 60: Section 14 - Display Customization

    Section 14 - Display Customization You can customize the linear gauges to your preference. Enter Program Mode, then tap STEP until ‘END? Y’ appears. Hold STEP to enter FAC LIM’ mode. Tap until you see ‘ STEP ‘CUSTOMIZE DISPLAY?’. Hold until appears ( may differ on your...

  • Page 61: Section 15 - Reference Reading

    JPI offers both e-mail (support@jpitech.com) and telephone technical support. Have your model and serial number ready when you call. Call JPI for a return authorization number RMA before returning any equipment. J.P. INSTRUMENTS Inc. 3185 B Airway Costa Mesa, CA 92626 800 345-4574...

  • Page 62: Section 17 - Limited Warranty

    Section 17 - 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...

  • Page 63: Section 18 - Edm-851 Twin Engine Addendum

    Section 18 - EDM-851 TWIN ENGINE ADDENDUM The following provides instructions for install / operation of the EDM-851 Twin Engine configuration. Each EDM-830 instrument is installed to its respective engine as if it were a single. One EDM operates as a ‘Master’, and the other operates as a ‘Slave’.

  • Page 64: Section 19 - Index

    Section 19 - Index * Pre-leaning procedure:, 25 ice, 34 temperature, 43 Celsius engine temperatures, 53 OAT, 46 Accumulate, 46, 51 Changing alarm limits, 52 total, 42 Adapter probe, CHT, 32 display, 14 Adjusting probe, 6, 32 K-factor, 49 too high or too low, 32, 35 OAT, 46 Climb, 29 TIT, factory original, 48...
  • Page 65 Download, 44 Fuel flow alarm limits, 55 connector, 59 diagnostics messages, 58 units, 55 Economy, best, 7 Full throttle, 29 EDM-711, 60 alarms, 35 display, 14 loss, 33 Gallons per hour, 43 probe, 6 GAMI, 22, 28 resolution, display, 46 Gasket probe, 32 select switch, 42 Gasket, manifold, 29, 35...
  • Page 66 K-factor Nautical miles per gallon, 43 changing, 46, 51 Navigation data formats, 57 determing, 50 NEW, 47 KPH, 43 NMEA-183, 57 NO COM, 58 NO SIG, 58 NO WPT, 58 Normalize view, 9 LBAT, 53 Northstar binary format, 57 Leak NRM, 9 manifold, 35 Leak, manifold, 29...
  • Page 67 fuel flow option, 49 Stuck valve, 33 Switch, select, 42 Rate baud, 58 Tabs, tank, 55 fuel flow, 37, 43 Tachometer. See RPM indexing, 49 Take-off, 29 shock cooling, 30 Tank capacity Real-time, 54 entering at power up, 56 Record, on, off, 54 Tanks, fuel Recording.

  • Page 68: Quick Reference Guide

    QUICK REFERENCE GUIDE Normalize View Transfer Data in Memory Hold LF for three seconds. Tap STEP to clear any alarms. should appear and EGT Insert USB Drive into the ‘NRM’ column heights will center. EDM data port. should appear. DUMP NEW Percentage View Tap STEP to select the Hold LF for three seconds.
  • Page 69 Filled Tanks Leaning Rich of Peak Note: if ‘FILL? N’ is visible, start Pre-lean mixture and wait one at ‘4.’: minute. Hold both STEP and LF until Tap LF (if you see LOP, h both STEP and LF until you the display shows PROGRAM followed by...
  • Page 70 Pilot’s Guide Supplement Engine Data Management EDM-740 Experimental Model Copyright  2009 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 PH: (714) 557-5434...
  • Page 71 EDM-740 Pilots Guide Supplemental Information This section describes the added capabilities and operation of the EDM- 740 model. The added capabilities are: Fuel Pressure: Monitors fuel pressure ranges for either carbureted or injected engines. Fuel pressure is displayed in the ‘Scanner’ area and optionally as a linear gauge via ‘Display Customization’.
  • Page 72 EDM-740 Program Mode additional choices Pilot Program Mode additions HOBBS: 1234.9 Displays engine total running hours. Factory Limit Program Mode additions LO AMPS=0 Tap/hold LF to change value. Tap STEP to save. Hold both STEP and LF buttons for a few seconds to access AMP calibration choice below.
  • Page 73 EDM-740 Pilots Guide Supplemental Information EDM-740 Expansion Module pin to sensor assignments J7 Harness Amps Pin / Shunt Hall Effect color Sensor/color Sensor/color 1 (wht) (+)amps ‘WHT’ (wht) 2 (grn) (-)amps (N.U.) 3 (blk) (N.U.) ‘BLK’ (blk) 4 (red) (N.U.) ‘RED’...

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