Urrea UD88 Manual De Usuario Y Garantía página 77

Set:
- RECORD (MAX-MIN-AVG ) function on the meter.
Typical measurements are approximately 10KΩ per
foot of wire.
For example 2 feet spark plug wire has about 20KΩ.
The measurement you make will be dependent on the
length of wire you select.
Compare readings to other spark plug wires found on
the engine to ensure the accuracy of the test.
NOTE: Be sure the test probe tips make contact with
the center conductor of the wire.
2. Primary Windings Resistance Test
Esta prueba verifica la resistencia en los bobinados
primarios de bobinas de arranque convencionales y
DIS (sin distribuidor).
This test checks for resistance in the primary windings
of conventional and DIS (distributor-less) ignition
coils.
To measure resistance in the primary 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 negative (-) terminal on the
coil.
- Red test probe to the positive (+) terminal on the
coil.
NOTE: For accurate low resistance measurements, the
resistance in test test leads must be subtracted from the
total resistance measured. Short the test leads together and
press the REL button. The resistance (typically) 0.2Ω to 1.5Ω
in the test leads will be automatically subtracted.
Typical measurements are between 0.5 and 2.0 Ohms.
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.
E N G L I S H
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