Mastech ms6231 - Measuring Engine Dwell

this meter can be used. Insert the black plug to the COM jack and the red one to the INPUT jack, touch
the end of the temperature sensor to the area or surface of the object for measurement.
4.18.5 You can get reading from LCD.
NOTE:
( With better hermetization, the meter ’ s temperature measured circuit and environment need a little
longer time to reach heat balance, and then accurate reading can be gotten.
4.19 MEASURING ENGINE DWELL
4.19.1 Connect the black test lead to the COM jack and the red test lead to the INPUT jack.
4.19.2 Set the transform switch at the desired DWELL range position according to the measured cylinder
of the engine.