User’s Handbook ST05 Oxygen sensor tester and simulator
Table of contents. 2. TECHNICAL SPECIFICATIONS 2.1 General Specifications 1. Safety Rules Page 1 2. Technical Specifications Page 2 Display: 2.1 General specifications 2.2 Electrical Specifications Page 2 Page 2 20 segment LED bargraph and two character alphanumeric display. Sample rate: 500 samples/second. 3. Operation Page 3 Sensor compatibility: Zirconia, Titanium 1 and 5 Volt Systems. Page Page Page Page Page Page Page Power: 9 Volt battery, type MN1604.
. OPERATION 3.2.2 Alphanumeric display description 3.1 Instrument Description 1) 2) 3) 4) 5) 6) 7) 8) 9) Protective rubber holster Alphanumeric display Analog LED bargraph Power ON/OFF button Simulate sensor “RICH” condition Sensor type select button Simulate sensor “LEAN” condition Response time test button Test leads with clips Numerical readout During normal operation, the alphanumeric display shows the number of crossings per second (cross-count) of the oxygen sensor signal.
3.3 Turning the power ON and OFF 3.4.2 Sensor signal measurement Power ON/OFF IMPORTANT 1- To turn the instrument ON, press and hold the (power ON/OFF) button until the display lights up (approximately 1 second) 2- To turn the instrument OFF, press and hold the (power ON/OFF) button until the display turns off (approximately 1 second) • To extend battery life, the ST05 will automatically turn off after 3 minutes of being idle (i.e. no button pressed and no input signal).
3.5 Oxygen sensor response test 3.7 Additional Functions 1- Select the sensor type to test and connect the test leads following the steps described in “3.4.1 Setting the type of sensor” and “3.4.
4. Oxygen sensor information The oxygen sensor is one of the most critical parts of the emission control system and fuel economy performance. This sensor measures the oxygen content in the exhaust gases, and the result is used by the PCM (Powertrain Control Module) to adjust the amount of fuel injected into the cylinders. Optimization of the fuel/air mixture minimizes the emission of pollutants and reduces fuel consumption. Oxygen sensor Powertrain Control Module Other sensors (MAF, MAP, TPS, etc.
4.1.4 Wide Band (Air/Fuel Ratio) dual cell sensors: 4.2.2 On vehicle testing of post-catalytic converter sensors These sensors, with the Bosch LSU4 being the most popular, use two Zirconia cells, one is used as a conventional Zirconia sensor (reference or Nerst cell), and the second is used to ‘pump’ oxygen into the reference cell in order to keep it at or near the stoichiometric output.
5. Maintenance 5.2 Cleaning 5.1 Battery replacement Keep the instrument in its carrying case when not in use and do not subject it to dampness or severe heat or cold. Do not use the instrument in the rain, if it should accidentally get wet, dry it off with a clean paper towel before storing away. Low battery indicator This message warns the battery voltage is below the minimum recommended and it needs to be replaced with a new battery.
Part # ST05MN0609EN © 2006 General Technologies Corp.
