RPM (R-1) Operating and Installation Instructions OI 0517911 5/17/91 Rev. C 9/24/97 * You must read this manual before installing or operating the instrument. This manual contains warranty and other information that may affect your decision to install this product and/or the safety of your aircraft. Model: S/N: Electronics International Inc. 63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.
Important Notice ***** MUST READ ***** If you think it is not important to read this manual, you're wrong! This manual contains important installation information that may affect the safety of your aircraft, delay your installation or affect the operation of your instrument. You Must read this manual prior to installing your instrument. Any deviation from these installation instructions is the sole responsibility of the installer/pilot and may render the STC invalid.
Contents Warranty .............................................................................. 2 Operating Instructions ............................................................
Warranty / Agreement Electronics International Inc. warrants this instrument and system components to be free from defects in materials and workmanship for a period of one year from the user invoice date. Electronics International Inc. will repair or replace any item under the terms of this Warranty provided the item is returned to the factory prepaid. 1. This Warranty shall not apply to any product that has been repaired or altered by any person other than Electronics International Inc.
Operating Instructions R-1 0517911 Instrument: The R-1 is a precision RPM instrument featuring a 210 degree analog display and a full four-digit digital display. These two displays have many advantages over conventional analog gauges as described below. Also, the R-1 features long-term accuracy and reliability. Since the R-1 does not incorporate any moving parts (needles, bearings, springs, etc.) there is little to go wrong or wear out. The internal microprocessor assures accuracy and repeatability.
The 10 RPM resolution of the R-1 can also help in setting the mixture control for maximum horsepower for aircraft fitted with either a fixed or variable pitch prop. This is most helpful during high altitude climbs or take-offs. As your engine is leaned at high altitudes it may exhibit an increase in RPM. This increase in RPM indicates an increase in power. For a variable pitch prop this will be a small change. It is not recommended to lean an engine when operated above 75% power.
Flight Timer and Peak RPM: This instrument includes an automatic flight timer. When the RPM meets or exceeds 2000 RPM for 10 seconds (as would occur on takeoff), the flight timer will reset to "00.00" and start timing in one-minute increments. The peak RPM register will also be reset to "0000". The flight timer will continue to count until the RPM drops below 1200 RPM for 10 seconds (as would occur on the landing roll-out). At this point the flight time and peak RPM will be stored in memory.
5. Check that the instrument make and model marked on the side of the instrument and on the invoice are correct before starting the installation. A R-1-6 is used on a 6-cylinder engine and a R-1-4 is used on a 4-cylinder engine. The R-1-?S1 or R-1-?S2 is to be used on a Lasar ignition system (or any system with a tach out). Also, check the invoice for proper tach time. 6. Check that the limit information on this instrument matches the published limits in your aircraft's P.O.H. or Flight Manual.
tors should not be changed, lengthened or altered in any way. There is another set of isolators in the instrument. These isolators insure safe operation while providing an easy and simple installation free of mechanical cables and pickups. Make sure the mag lead screws are tight and the connectors are not interfering or shorting to any other terminals on the mag switch. Route the Pickup Wires: Route the orange wire and the brown wire from the wire harness to the isolators.
Route the External W arning Control Line: Warning The white/yellow wire can be connected to an external light (AL-1), buzzer (ATG-1), voice annunciator (AV-17), a relay, etc. This wire grounds when the red warning light is on. The current in this line must be limited to 1/10 of an amp maximum. Exceeding this limit will damage the unit. If this feature is not used leave this line open. Tie wrap this wire so it does not obstruct the freedom of travel of any controls.
5. Bring the engine RPM up to 1500 and look for proper operation. A jumpy high RPM reading at this step may be cause by a higher than normal voltage output from a Bendix Mag. If this is the case, install the Bendix Isolators supplied in your R-1 package. 6. Check that the screws on the mag switch have been properly tightened and the connectors are not interfering or shorting to any other terminals on the mag switch.
RPM (R-1) Wiring Diagram WD 0311911 Do not use screws longer than 1/2" (4 ea.). Circular Connector Red Power Lead, connects to 12 or 24 Volt Bus via one amp fuse. Black Ground Lead, connects to Ground. Wire Harness White/Brwn White/Red White/Orng White/Yel Brown 12V Backlight Control Line, connects to Red Power Lead for a 12V system via the power fuse. 12 volts turns on the digital display backlight. 24V Backlight Control Line, connects to Red Power Lead for a 24V system via the power fuse.
R-1 Circular Connector Connecting Cable Harness, Back View (wire side) 3 6 9 W/ Yel Blk Red 1 W/ Org W/ Red W/ Brn 4 Brwn Note: See Wiring Diagram for hook up information. Orng 7 11 Rev.
Specifications and Operating Features S0520911 Model: R-1 (RPM Instrument) Case Dimensions: 2.5" x 2.5" x 3.65" depth, 2 1/4" Bezel. Weight: 10 Oz. Environmental: Meets TSO C49a. Power Requirements: 7.5 to 30 Volts, 1/10 Amp. Analog Display: 17 High Intensity Light Emitting Diodes (LEDs) in a 210 degree arc with Intensity Control Line available for dimming. Sequential flash test on power up. Microprocessor eliminates LED hunting (flicker).
Signal Pickup: Connects to Left and Right Mag Leads through isolators. Safety insured by additional in-line isolators located in the unit. Instrument will operate on Mags, CDIs and automotive ignition systems. No cables or mechanical connections required. Tach Time: Keeps a running total time for RPM readings at or above 1300 RPM. Time is stored in memory for life. There are no internal batteries and power is not required to keep memory alive. Maximum reading is 99,999.9 hours. Displayed in .
