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AFRecorder 2000A 

 

Fast Air-to-Fuel Ratio Analyzer 

 
 

Instruction Manual 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

6/03 Part Number 2000A-11 

 

 

Summary of Contents for AFRecorder 2000A

Page 1: ...AFRecorder 2000A Fast Air to Fuel Ratio Analyzer Instruction Manual 6 03 Part Number 2000A 11...

Page 2: ...ENGINE CONTROL AND MONITORING Information and specifications subject to change without notice AFRecorder and AFRemote are trademarks of Engine Control and Monitoring IBM is a registered trademark of t...

Page 3: ...ated EGO Sensor Output 7 RS 232 Communication Hook up 7 Stand Alone Operation 9 Measurement and the SYS Key 9 Recording 12 Results Menu 12 Setup Menu 14 Display Menu 14 Record Menu 15 Outputs Menu 16...

Page 4: ...pecifications 29 Input Specifications and Limits 30 Output Specifications and Limits 32 General Information 34 Theory of Operation 37 Air to Fuel Ratio Sensing 37 Display Recording Storage and Statist...

Page 5: ...g Slow motion or select time playback with statistics Linearized and programmable 0 to 5 VDC analog output Simulated EGO exhaust gas oxygen sensor output with a programmable switch point Programmable...

Page 6: ...E 2 4 120 VAC U S Power Cord 6 ft 2400G 38 5 12 VDC Power Cord 20 ft 2400E 7 6 Case Ground Cable Braided 3 ft 2400A 17 7a Spare Power Fuses 1 A Slow Blow 2400G 39 for 120 VAC Quantity 2 or 7b Spare Po...

Page 7: ...er will collect on the sensor s tip To minimize thermal shock to the AFR sensor caused by condensed water operate the engine for approximately one minute before turning on the AFRecorder and leave the...

Page 8: ...4...

Page 9: ...REC ENT SYS stands for SYSTEM and pressing it halts the current operation and brings the AFRecorder to the main menu REC stands for RECORD and pressing it while the AFRecorder is measuring starts a r...

Page 10: ...is welded or brazed to the engine s exhaust pipe This thread size is identical to that of the exhaust oxygen sensors used in current production automobiles with 3 way exhaust catalysts Mounting bosse...

Page 11: ...up Outputs Analog on page 16 and Setup Outputs Sim EGO on page 16 for information on programming these outputs and Output Specifications and Limits on page 32 for the DB9 connector pin assignments RS...

Page 12: ...8...

Page 13: ...brated in air see AFR Measurement Calibration AIR CAL on page 19 xxxx AFR measurement function error see Troubleshooting on page 39 V LO Supply voltage to AFRecorder is less than 11 VDC or AFR sensor...

Page 14: ...d display of AFR select 1 MEASURE by pressing 1 on the keypad the review of a recorded session select RESULTS the modification of the AFRecorder s configuration select SETUP or the modification of the...

Page 15: ...1 ANALOG Program output range 2 SIM EGO Program simulated EGO sensor AFR switch point 3 ALARMS Alarm source limits 4 CAL D A Calibrate analog output 4 OPTIONS 1 ICC Activate ICC 2 ALARMS Arm lights b...

Page 16: ...it value will be used to calculate the statistics The recording duration and the sample interval time between recorded samples are all programmable see Setup Record Menu on page 15 To abort a recordin...

Page 17: ...s to the results menu Pressing SYS will abort the replay and the AFRecorder will present the main menu Results Statistics If STATISTICS is selected the statistics of the last recording will be display...

Page 18: ...ssing of the ENT key The EXIT option returns the AFRecorder to the main menu SETUP 1 DISPLAY 4 OPTIONS 2 RECORD 5 CONSTS 3 OUTPUTS 6 EXIT Figure 7 The Setup Menu Setup Display Menu The selection of DI...

Page 19: ...200 measurements MEDIUM 0 50 sec 50 measurements FAST 0 25 sec 25 measurements Table 1 Display Rate Options Selecting a display rate also determines the duration of the alarms lights and buzzer The al...

Page 20: ...s i e AFR or and its value in which the simulated exhaust gas oxygen EGO sensor output transitions from its low approximately 0 02 V state to its high approximately 0 8 V state or vice versa A low out...

Page 21: ...this menu will return the AFRecorder to the setup menu SETUP OPTIONS 1 ICC 3 SOUND 2 ALARMS 4 EXIT Figure 10 The Setup Options Menu Setup Options ICC ICC stands for Incomplete Combustion Compensation...

Page 22: ...n increase in the ICC factors 1 High degree of valve overlap 2 Low compression ratio 3 Cold engine operation 4 Spark timing advanced from MBT minimum timing for best torque Setup Constants AFR Sensor...

Page 23: ...ed offset acts across the entire range of measured AFRs The offset must be entered in AFR units limited to 2 AFR but it will act on the reported AFR in AFR and units The AFR offset does not act on O2...

Page 24: ...entered including reentering the same number see Setup Constants AFR Sensor on page 18 the AFRecorder assumes that a new sensor is being used and resets the AGE FACTOR to 1 00 The effect of this is t...

Page 25: ...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 by AFRemote to i...

Page 26: ...lection will exit from a menu To exit AFRemote select File followed by Exit In some cases a dialog box will appear in the center of the screen Dialog boxes request the entry of alphanumeric data which...

Page 27: ...ection is complete the status AFRecorder Connected is shown in the bottom left corner of the screen REMOTE MODE SENDING DATA REMOTE MODE IDLE Figure 13 AFRecorder Display During Software Connection Fi...

Page 28: ...the plotting Pressing Esc twice will stop the plotting and return to the main menu Modifications in the scaling the plots are made using the Plots menu and the Set Plot Scales selection Measurement wi...

Page 29: ...CII format than it does in AFRemote format Figure 15 is an example of an exported file The time and recorded measurements are always stored as two columns The left column is time and the right column...

Page 30: ...llowed by Save Recorded Data stores data in AFRemote format A filename will be requested for the recorded data It is recommended that a filename with the extension AFR be used for these files These fi...

Page 31: ...and alone mode One difference is that in remote mode the modified setup parameters must be downloaded to the AFRecorder for setup changes to take effect Select the AFRemote Setup menu to specify the s...

Page 32: ...28...

Page 33: ...R range depends on the composition i e H C ratio O C ratio N C ratio of the fuel Recording Specifications Data Recorded AFR in displayed units or O2 Sample Size Up to 5000 measurements Recording Durat...

Page 34: ...ommonly used methanol H C 4 0 O C 1 0 N C 0 0 ethanol H C 3 0 O C 0 5 N C 0 0 propane H C 2 67 O C 0 0 N C 0 0 methane H C 4 0 O C 0 0 N C 0 0 Do not use the AFR sensor with leaded fuel or in a heavil...

Page 35: ...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 Vs cell...

Page 36: ...system receiving the output s from the AFRecorder must be set up in differential mode If differential mode is not available and single ended mode is used be aware that an approximately 10 mV potentia...

Page 37: ...d up and the AFR sensor is on Simulated Exhaust Gas Oxygen EGO Sensor Output Programmable transition Air to Fuel Ratio AFR or High Output Level for richer than programmed transition AFR Approximately...

Page 38: ...Type 3AG Power AC 220 240 VAC 0 17 A continuous Fuses 2 0 5 A Slow Blow 250 VAC Type 3AG Power DC 11 16 VDC 6 A surge 2 5 A continuous Connector AMP Series 1 Arrangement 11 4 Pin 1 12 VDC Pin 2 12 VD...

Page 39: ...Dimensions 10 2 x 4 6 x 13 3 25 9 cm x 11 7 cm x 33 8 cm W x H x D Weight 10 lbs 4 5 kg Specifications and Limits 35...

Page 40: ...36...

Page 41: ...he engine s AFR can be calculated using chemical equilibrium relations and atom balances However the degree to which an engine exactly matches these calculations is dependent on the degree to which th...

Page 42: ...values The averaging and the display update interval are selectable see Table 1 on page 17 AFRemote s real time display and real time plotting options use data processed at the Fast setting in Table 1...

Page 43: ...that one or more of the setup parameters stored in the EEPROM has been corrupted Usually this is the result of a severe powerline or signal surge If this occurs the AFRecorder replaces the corrupted...

Page 44: ...40...

Page 45: ...d engine it is best to think out your moves before you make them Route and cable tie all wires away from hot moving sharp high energy spark and caustic objects Take into consideration the movement of...

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Page 47: ...implied or 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 s...

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Page 50: ...Los Altos CA 94023 0040 USA 408 734 3433 Fax 408 734 3432 www ecm co com...

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