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3. Secondary Windings Resistance Test
This test checks for resistance in the secondary
windings of conventional and DIS (distributor- less)
ignition coils.
To measure resistance in the secondary windings:
- Set the rotary switch to resistance (Ω).
- Disconnect the coil from the ignition system.
Insert:
- Black lead into COM jack.
- Red lead into VΩRPM CAP jack.
Connect:
- Black test probe to the high-tension terminal on the
coil.
- Red test probe to the positive (+) terminal on the
coil.
Typical measurements are between 6KΩ and 20KΩ.
To get the actual figures for a specific coil, check the
manufacturer’s specifications.
- Don’t forget:
Test the ignition coil when it is hot, and again
when it is cold.
4. Condenser/Capacitors Leakage Test
This Meter can be used to check automotive condensers
(capacitors). To check the condenser, connect it across
the COM and VΩRPM CAP input jacks on the Meter
and set the rotary switch to the resistance function.
The movement of the bar graph will show that the
Meter is charging the condenser. Over a short period
of time, you will see the resistance increase from 0 to
infinity.
CAUTION: BEFORE PERFORMING THIS TEST, MAKE SURE
THE IGNITION SYSTEM IS TURNED OFF AND ALL WIRES
CONNECTED TO THE COILS ARE DISCONNECTED.
You can check for leaking condensers using the ohms
function.
Since the resistance function applies a voltage across
the test leads, the condenser will charge up and the
displayed resistance should increase to infinity. Any
other reading would indicate that you should replace
the condenser.
Summary of Contents for UD88
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