TM Tach/Sync Adapter 901 Indicator Lights Battery Compartment Select Button Inductive Pickup Stackable Banana Jacks OPERATOR’S MANUAL
Adapter Operation The SELECT button powers the 901 and selects the mode of operation. Pressing the SELECT button steps the unit through the test modes. After one minute of no signal the 901 will automatically turn the power off to save the battery. RPM Mode 1. Plug the banana plugs into the Digital Multimeter (DMM) or other tester. RED to the positive input ; BLACK to the negative or COMMON input. 2. Select the Volts or millivolts DC setting on the DMM. 3.
Getting a Stable Reading If the RPM reading is not reasonably stable, the following steps will help you obtain the most stable reading possible. 1. Make sure the spark pickup is close to the spark plug, and the pickup latch is securely closed. 2. On DIS double ended coil system, some of the coils fire opposite of a conventional coil. Turn the spark pickup over. 3. A misfiring spark plug wire will cause an erratic reading. Move the pickup to another spark plug wire. 4.
SAFETY PRECAUTIONS —Read All Instructions Before Using The Adapter— Always wear eye protection when testing vehicles. Be extra careful near batteries and moving parts. Do not lay tools on a battery. Battery gas is highly explosive. If a battery explodes flush the acid away from skin with generous amounts of water. Follow up with a neutralizing solution of baking soda and then more water. Never use a wrench on the ungrounded battery terminal until the grounded one has been disconnected.
