MAFM1 - LAMBDA METER
OVERVIEW
MAFM1, our single channel multi sensor compatible air / fuel ratio meter is a proven reliable instrument that has seen wide spread application in many fields, including motorsport, training, research, engine calibration and diagnosis. It users include engine tuners, race car teams, technical training colleges, universities, automotive aftermarket product and original equipment manufacturers and aerospace customers.

This instrument uses either a conventional oxygen sensor or a UEGO (universal exhaust gas oxygen) sensor. It provides a digital display of lambda or Air / Fuel ratio with scaling for Gasoline, Diesel, LPG and Alcohol. An additional bar graph display with a peak and hold function quantifies transient fueling errors. Dual linearized analog outputs are provided for connection to Autronic ECUs or dash / data logger devices.
SMART - Intelligent adaptive filtering allows the digital readout to provide meaningful steady state readings and rapid response to large air / fuel ratio changes.
BRIGHT - Large, high brightness LED displays provided excelent readibility in all lighting conditions.
TRANSIENT CAPTURE - When tuning engine management systems for optimal transient fuelling, use the bar graph with peak & hold enabled to capture transient Air/fuel ratio excursions.
DIAGNOSTICS - We appreciated the importance of reliable measurement and include measures to prevent invalid measurement. Comprehensive inbuilt diagnostics determine sensor condition and inhibit measurement until the sensor is ready and able to operate reliably. Sensor warm-up state & condition are reported in real time.
ROBUST - Designed to withstand the arduous conditions encountered during automotive testing. Multiple levels of defence against electrical surge are provided on the inputs, output and power supply. Over temperature protection is enhanced by a built-in protective hibernation feature.
BENEFITS
SPECIFICATIONS
MAFM1 - B version
MULTI SENSOR COMPATIBLE AIR/FUEL RATIO METER
Measurement range Using UEGO sensor

Using LSM11 sensor
0.618 - 5.4 λ
0.580 - 5.4 λ (extended range option - requires firmware rev 1.06)                                
0.7 - 1.3 λ
Digital readout
Display Units
Resolution

Update rate
Effective filtering time constant
4 digit 0.52" Hi-intensity red LED
λ, or A/F Petrol, Gas or Alcohol
0.01 or 0.001 λ, or  0.1 or 0.01 A/F
(depending on sensor type connected)
1.25 to 5 samples/sec (user selectable)
0.1 to 6.4 SEC (user selectable)
Bar Graph readout
Display range
Response time
Display modes

Max, Min hold times
20 segment multi-colour LED
0.50 - 3.05 λ (user adjustable limits)
40mSEC (approx)
Instantaneous value and / or max value,
min & max, min & max & actual, min to max
0.1 - 1.6 SEC (user selectable)
Analog output Output type

Output range

Output voltage range

Output resolution
Effective filtering time constant
Signal ground range
Twin voltage O/P type, tolerant to system ground
voltage difference
0.5 to 3.05 λ (user can define λ values for min & max O/P limits)

0 - 1.05 & 0 - 5.2 volts (both available simultaneously)

Better than 0.1% FS
0.04 - 0.5 SEC (user selectable)
+/- 3.0 volts
Power supply - Voltage Normal operation
Operational limits

Survival limits

11.0 to 16 volts DC
10.3 to 20 volts DC continuous

+/- 23 volts (< 5 minutes)
Outside +/-23 volt limits:
       >   +80 A  (Load dump < 20 mSEC)
       >  +100 A (Inductive surge < 1 mSEC)
       < -1000 V (Inductive surge < 10 uSEC)
Power supply - Current
Typical
Max
< 1.0 Amp + sensor heater current
1.0 Amp to 4.0 Amp (sensor warm)
< 10 amp (sensor cold)
Operating temperature range Limits -25 deg C to +70 deg C (Automatic safety shut-down @ 70deg C approx)
Storage temperature range Limits -40 deg C to +80 deg C
Housing Case type
Size
ABS
200 * 112 *31 mm (l * w * h)
Weight 0.4 kg
Connectors Main connector
Sensor connector
D-sub 9 male (high durability type)
D-sub 15 female (high durability type)
APPLICATION INFORMATION
  Size
  MAFM1A SET-UP 159KB
  MAFM1B SET-UP 244KB
   
 
  MAFM1 WIRING 56KB
  MAFM1 UEGO sensor wiring 208KB
   
 
  MAFM1B Calibration (UEGO sensors ONLY) 187KB
  Lambda Sensor care  
 
PURCHASE OPTIONS
MAFM1 - B version
MULTI SENSOR AIR/FUEL RATIO METER


(supplied with rear mount plate. Available with or without exhaust gas sensor and lead sets for vehicle and/or dynamometer test cell installation)
MAFM1 COMPATIBLE LEADS
Uego Sensor lead (4 or 8 metre)
suits MAFM1-B version only
LSM11 Sensor lead (5 or 8 metre)
Cigarette lighter power lead
Croc. clip power supply lead
Wire-in Power Supply / Log O/P lead
 
 
© 2016 Aubert Electronics Pty Ltd
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