AFRecorder 4800
Dual-Channel
Fast Air-Fuel Ratio Analyzer
Instruction Manual
6/03 Part Number 4800-11
™
Page 1: ...AFRecorder 4800 Dual Channel Fast Air Fuel Ratio Analyzer Instruction Manual 6 03 Part Number 4800 11...
Page 2: ...ced in any form without prior written consent from ECM ENGINE CONTROL AND MONITORING Information and specifications subject to change without notice AFRecorder and AFRemote are trademarks of Engine Co...
Page 3: ...er Hook up 7 Air to Fuel Ratio Hook up 8 Analog Outputs and Simulated EGO Sensor Outputs 9 RS 232 Communication Hook up 9 Stand Alone Operation 11 Measurement and the SYS Key 11 Recording 14 Results M...
Page 4: ...rding Specifications 33 Real Time to Disk and Real Time Plot to Disk Specifications 34 Input Specifications and Limits 34 Output Specifications and Limits 36 General Information 38 Theory of Operation...
Page 5: ...rding 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 c...
Page 6: ...with Severe Duty Connectors 3a standard 1 AFR Sensor Cables 30 ft Quantity 2 2400E 32 or 3b optional 2 3 Severe Duty Panel Mount Cable Kit 4800R 21 4 120 VAC U S Power Cable 6 ft 2400G 38 replaced wi...
Page 7: ...24 20 AWG Wire Quantity 6 AMP 66105 4 d Terminals for 18 14 AWG Wire Quantity 2 AMP 66360 4 2 Quantity 1 of Fischer Panel Mount Connector ID Ring Sealing Cap Kit Left Channel Black Part No 4800R 20L...
Page 8: ...ed with appropriate power cable for export 5 12 VDC U S Power Cable 20 ft 2400E 7 6a Spare Power Fuses 2 A Slow Blow 4800R 18 Type 3AG for 120 VAC Quantity 2 or 6b Spare Power Fuses 1 A Slow Blow 4800...
Page 9: ...sors tips To minimize thermal shock to the AFR sensors caused by condensed water operate the engine for approximately one minute before turning on the AFRecorder and leave the AFRecorder on for approx...
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Page 11: ...the user of an entered selection The key serves both as a minus sign and a backspace key for the cursor to delete an incorrect entry Rear Panel and Power Hook up The AFRecorder Model 4800R is powered...
Page 12: ...nside the instrument Air to Fuel Ratio Hook up The AFR sensors are mounted in the engine s exhaust by threading them into M18X1 5 mm bosses that are welded or brazed to the engine s exhaust pipe This...
Page 13: ...ernal data acquisition system Also available are simulated EGO exhaust gas oxygen sensor outputs with programmable switch points See Setup Outputs Analog on page 19 and Setup Outputs Sim EGO on page 1...
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Page 15: ...us Right Sensor AFR L R and Average AFR of both sensors AVG The left AFR sensor s values are displayed on the left display and the right AFR sensor s values are displayed on the right display Dependin...
Page 16: ...the AFRecorder has begun displaying the AFR measurements only two keys will alter its operation SYS System and REC Record The outcome of pressing REC will be discussed in the section entitled Recordin...
Page 17: ...3 OUTPUTS 1 ANALOG Program output ranges 2 SIM EGO Program simulated EGO AFR switch points 3 CAL D A Calibrate analog outputs 4 OPTIONS 1 ICC Activate ICCs 2 SOUND Activate key beeping 3 DEFAULTS Sets...
Page 18: ...the AFRecorder detects an AFR outside of its measurement range less than 0 40 or greater than 10 0 the value recorded will be the rich or lean limit and the limit value will be used to calculate the...
Page 19: ...the replay pressing will update the display with the data from the next sample time Pressing will update the display with the data from the previous sample time Pressing ENT will continue the replay A...
Page 20: ...ple of Statistical Results Screen 2 Choosing EXIT from the statistics menu will return the AFRecorder to the results menu Results Point Selecting POINT from the results menu allows the examination of...
Page 21: ...E is selected the AFRecorder will request the selection of the measured parameter to enlarge The choice of display size does not influence whether one or both AFR sensors are recorded during a recordi...
Page 22: ...sec 32 measurements MEDIUM 0 60 sec 16 measurements FAST 0 34 sec 8 measurements Table 1 Display Rate Options Setup Record Menu The RECORD selection from the setup menu allows the setting of the reco...
Page 23: ...pproximately 0 02 V states to their high approximately 0 8 V states or vice versa A low output means that the AFR is leaner than its programmed value and a high output means that the AFR is richer tha...
Page 24: ...see Figure 13 Selecting EXIT from this menu will return the AFRecorder to the setup menu SETUP CONSTANTS 1 SENSOR_L 4 ICC_L 2 SENSOR_R 5 ICC_R 3 FUEL AIR 6 EXIT Figure 13 The Setup Constants Menu Set...
Page 25: ...rt is used to determine the water vapor pressure Pw Setup Constants ICC_L ICC_R Information pertaining to the engine s degree of combustion efficiency is entered after selecting ICC_L for the left AFR...
Page 26: ...r 20 minutes a If the AFRecorder shows O2 for AFR where is the O2 in air then the AFR measurement function does not require calibration b If the AFRecorder does not show O2 then select AIR CAL from th...
Page 27: ...air AFR Measurement Enable Disable Selecting ENABLE from the main menu allows the AFR sensors to be powered down DISABLED and up ENABLED for sensor removal To avoid AFR sensor damage a sensor should...
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Page 29: ...stand alone DOS program or from an MS DOS prompt within Windows AFRemote will work on floppy disk hard disk or ram disk Simply copy the file AFREMOTE EXE to the desired target disk The commands used...
Page 30: ...ouse left button with its cursor on the selection s name After making a selection the menu will unfold showing further choices related to that selection The cursors arrow keys or mouse are used to hig...
Page 31: ...lt and if Com2 is used it must be selected each time AFRemote is started 6 Make the software connection between the AFRecorder and the PC by selecting Commands followed by Connect to AFRecorder During...
Page 32: ...sured parameters can be viewed on the PC s screen in two forms real time display or real time plotting With both forms the AFR units are those selected in setup see Setup Display Menu on page 17 The u...
Page 33: ...ey on the PC s keyboard or the mouse s left button will suspend the plotting Pressing any key except for Esc or the left button again will continue the plotting Pressing Esc twice will stop the plotti...
Page 34: ...l be requested and it is recommended that the filename extension EXP be used for these files Note that ASCII files cannot be loaded into AFRemote for plotting and analysis only files stored in the com...
Page 35: ...maximum time to upload recorded data is approximately four minutes for 10 000 measurements This time varies with the type of PC used The uploaded data can be stored in the PC either in a compact form...
Page 36: ...n dump during a real time operation ex real time plotting will interrupt the procedure and result in a system timeout If AFRemote is run from a MS DOS prompt within Windows use the Windows clipboard t...
Page 37: ...ne with an H C ratio of 1 85 For other fuels AFR range depends on the composition i e H C ratio O C ratio N C ratio of the fuel Recording Specifications Sample Selection Choose one or both AFRs to rec...
Page 38: ...page 43 Fuel Composition H C ratio range 0 00 10 00 O C ratio range 0 00 10 00 N C ratio range 0 00 1 00 gasoline 1 70 H C 2 10 O C 0 0 N C 0 0 1 75 or 1 85 are commonly used methanol H C 4 0 O C 1 0...
Page 39: ...nsor AMP Series 1 Arrangement 13 9 Standard Duty Connector Pin 1 Heater Pin 6 Ip Vs cell Pin 2 Heater Pin 7 Not connected Pin 3 Ip cell Pin 8 Cal resistor Pin 4 Not connected Pin 9 Cal resistor Pin 5...
Page 40: ...Pin 5 Signal Ground Pin 6 Right Simulated EGO Sensor Pin 7 Left Simulated EGO Sensor Pins 8 9 Signal Ground All outputs must be measured relative to the signal ground pin s on the connector In the ca...
Page 41: ...collecting data Vad1 is the voltage reported by the data acquisition system when the AFRecorder is outputting 1 Volt Vad4 is the voltage reported by the data acquisition system when the AFRecorder is...
Page 42: ...other pins Not connected Cable Use straight through cable to computer Software AFRemote software for IBM PC compatible computer provided on 1 44MB 3 1 2 media General Information Power AC 100 120 VAC...
Page 43: ...ble jumper This gives the Model 4800R the maximum flexibility for integration into specific installations Neither ground is connected to the signal ground The AFRecorder Model 4800P internally connect...
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Page 45: ...atches these calculations is dependent on the degree to which the combustion has approached equilibrium or completeness This degree of completeness is engine dependent and a function of parameters suc...
Page 46: ...and the suffixes l s and r stand for lean stoichiometric and rich The ICC factors are factory set for typical production engines and can be modified see Setup Constants ICC_L ICC_R on page 21 ICC fac...
Page 47: ...two ways that the AFRecorder reports errors as ERROR where is a number or as EEPROM Errors Found ERROR is most often caused by the entry of an unrealistic setup parameter or combination of parameters...
Page 48: ...set the AFRecorder will act as if it was just turned on Conditions that will cause the AFRecorder to reset itself are 1 Unreliable or noisy power 2 Excessive spark noise Simple experimentation ex grou...
Page 49: ...ne it is best to think out your moves before you make them Route and cable tie all sensors and cables away from hot moving sharp high energy spark and caustic objects Take into consideration the movem...
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Page 51: ...arising by operation of law trade usage or course of dealing are hereby disclaimed LIMITATION OF REMEDY Seller s liability arising from or in any way connected with the items sold and or services prov...
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Page 55: ...Los Altos CA 94023 0040 USA 408 734 3433 Fax 408 734 3432 www ecm co com...
