tapec vajag padomu.
multimetrs ir uzstādīts kaa bildē un parbaudot man visām svecēm uzrāda 01,0 tas nozīmē vinas beigtas vai dzīvas?


martij wrote:Multimetrs pareizi uzstādīts - mērīšanai līdz 200 omiem.
Nolasīts ir 1oms. Multimetram ir arī sava iekšējā pretestība, kuru iegūstam savienojot spailes pa taisno, tā var svārstīties.. plašās robežās. Kvēlsveces pretestību iegūstam no izmērītās pretestības atņemot multimetra iekšējo.
No bosch manuāļa ->
Reliable and precise functional test
For the functional test, the glow plug resistance should
be measured using only an Ohmmeter / multimeter. This
protects the glow plug (especially Bosch GLP 0 250 403
XXX and 0 250 402 XXX with nominal voltage < 11 V)
against overheating due to direct battery voltage. It also
protects the workshop against possible consequences
such as injuries or engine damage due to molten metal
parts.
The resolution of the multimeter should be less than
100 mOhm
For a good measurement connection, wipe oil, dirt or
corrosion off the contacts
Determine the inherent resistance (offset) of the
multimeter: Place the ends of the measurement
electrodes together and read off the measured value
Measuring points when installed (engine off): Apply the
electrode of the measurement device to the connector
of the glow plug and engine housing (ground)
Resistance value of the glow plug = measured value
minus inherent resistance of multimeter (offset)
Resistance values:
Resistance ∞ Ω: Malfunction:
Glow plug defective
Resistance < 0.2 Ω: Malfunction:
Glow plug defective
Resistance > 0.2 Ω and < 5 Ω: Glow plug OK
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