Introduction
The AFRecorder 4800
The AFRecorder 4800 is a dual-channel, UEGO (universal exhaust gas oxygen) sensor-
based, air-to-fuel ratio (AFR) analyzer. The AFRecorder 4800 comes in two forms: a Model
R (rack mount) and a Model P (portable). Both AFRecorders report an engine's AFR in four
ways:
• Air-to-Fuel Ratio: AFR_L, AFR_R (left and right sensor)
• Average Deviation of AFR: DEV_L, DEV_R (left and right sensor)
• Left Minus Right AFR: L - R
• Average AFR: AVG.
Its features include:
• Air-to-Fuel Ratio can be displayed in AFR, λ, or φ units. %O
2
can also be
displayed.
• Measures Air-to-Fuel Ratio for a wide variety of fuel types
• Selectable 4 line or large (0.72") character backlit displays
• Large (5,000 point) non-volatile memory for recording
• Slow-motion or select-time playback with statistics
• Linearized and programmable 0 to 5 VDC analog outputs
• Simulated EGO (exhaust gas oxygen) sensor outputs with programmable switch
points
• RS-232 communication interface
• 100-240 VAC (Models R and P) and 11-16 VDC (Model P) operation.
The AFRecorder can be operated in two modes: "stand-alone" or "remote". In stand-alone
mode, commands to the AFRecorder are entered using the keypad on the front panel and the
measurements, recordings, and operational menus are viewed on the front panel displays. In
remote mode, commands are entered and measurements, recordings, and operational menus
are viewed using an IBM-compatible PC.
The AFRemote software package is used to operate the AFRecorder in remote mode. In
addition to measurement, recording, and setup functions, AFRemote provides:
• Real-time plotting
• File handling facilities
• Keyboard and mouse control.
Introduction 1
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