 |
This is a good waveform |
 View larger image
 Download this waveform file for use with PicoScope
Ignition Amplifier Earth Waveform Notes
The earthing on the ignition amplifier (also referred to as the module or the igniter) is vital to the operation of the ignition system and is often overlooked as an area for potential problems.
The earth connection, if not in good condition, can cause a reduction in the primary current that will effect the current limiting (or dwell control) circuit. It is therefore vital that this important connection is tested and rectified if it is found to be outside of its operational limits. An earth return circuit can only be tested while the circuit is under load and this therefore makes continuity testing to earth with a multimeter inaccurate. As the coils primary circuit is only complete during the dwell period, this is the time that the voltage drop should be monitored.
Ensure that the ‘voltage ramp’ does not exceed 0.5 volts. The ‘flatter’ the resultant waveform the better. A waveform with virtually no rise, shows that the amplifier/module has a perfect earth. If the ‘ramp’ is too high, another earth wire can be soldered in parallel with the original earth connection will be beneficial.
汽車診斷 | 汽車診斷儀 | 汽車故障診斷儀 | 汽車測試儀 | 汽車分析儀 | 汽車診斷示波器 | 汽車電路測試儀 | 汽車電路分析儀 | 發(fā)動機(jī)分析儀 | 發(fā)動機(jī)綜合分析儀 | 發(fā)動機(jī)檢測中心 | 點(diǎn)火分析儀 | 點(diǎn)火測試儀 | 汽車傳感器測試儀 | CAN總線示波器 | LIN總線示波器 | 汽車故障記錄儀 | 汽車傳感器分析儀 | 汽車檢測儀 | 噴油嘴測試儀 | 點(diǎn)火線圈測試儀 | 蓄電池測試儀 | 發(fā)電機(jī)測試儀 | 起動機(jī)測試儀 | ABS傳感器測試儀 | ECU測試儀 | ECM測試儀 | 進(jìn)氣真空/壓力測試儀 | 排氣壓力測試儀 | 汽車技術(shù)培訓(xùn) | 爆震傳感器測試儀 | 缺火測試儀 | 缺缸測試儀 | 線路測試儀 | 引出線 | 汽車數(shù)字示波器 | 真空傳感器 | 高壓感應(yīng)測試頭 | 無分電器點(diǎn)火測試頭 | 獨(dú)立點(diǎn)火（COP）感應(yīng)測試頭 | 漏電測試儀 | 氣缸相對壓縮測試 | 電腦測試儀 | 發(fā)動機(jī)控制器測試儀 | 泄漏測試儀 | 熒光檢漏 | 超聲波檢漏 | 汽車數(shù)字萬用表 | 電流鉗表 | 電流勾表 | 點(diǎn)火正時燈 |
