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Help on using piece of test equipment
Posted: Sun May 17, 2009 8:42 pm
by PSL184
Picked this up cheap at an autojumble. It looks like a useful multi test meter of some sort but I'm not sure where to connect the leads to....
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It has a pos & Neg croc clip but it's this little bit that must pick up a signal from somewhere that I'm not sure about?
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Posted: Sun May 17, 2009 9:46 pm
by Mogwai
nice find
the metal strip may be for the ameter function. how high does it read on the gauge
Posted: Sun May 17, 2009 11:00 pm
by 8009STEVE
http://www.mgbclub.com/cgi-bin/mb_detail.pl?id=48
This might help. it is for a digi meter, but there is a link on what the meter can do.
Posted: Sun May 17, 2009 11:23 pm
by tortron
Mogwai wrote:nice find
the metal strip may be for the ameter function. how high does it read on the gauge
right on the money
Posted: Sun May 17, 2009 11:51 pm
by PSL184
The ameter reads upto 60 amps. Steve's link (thanks) has shown me how to check RPM's & Dwell angle etc but I'm still not sure how to measure amps?
Posted: Mon May 18, 2009 10:00 am
by tortron
typing now
Posted: Mon May 18, 2009 10:09 am
by tortron
how to use ammeter - charging current test
1. To prevent accidental damage to the system, disconnect the negative battery cable.
2. move function switch to amps position
3. remove the wire from the charging systems output (B+)(on the generator or alternator) terminal and connect the external shunt between the output terminal and the wire which was removed, If the shunt is not permanently attached to the amp lead on your insrument, connect the green and blue clips to the small screw terminals on the shunt in such a manner as to result in up-scale readings.
4. reconnect the battery cable.
5. crank engine several times without starting to partially discharge the battery
6. start engine and run it about 2000rpm. note the highest reading just after starting the engine
caution: do not allow the external shunt to contact any exposed grounded surface while making connections or during tests.
NOTE: if the meter reads backwards, reverse the shunt connections in the step 3.
Test results
a. If the ammeter reading comes within 10 amps of rated output specified by the manufactureer, chargine current of alternator (generator) regulator system is acceptable.
b. If maximum output is 10 amps or more below the specified output, proceed to the following test to detect the cause of low charging current to either a defective alternator (generator) or misadjusted ot defective regulator.
c. DC generator only: if output current is too high, re-adjust the regulator's current limiter or replace the regulator
Posted: Mon May 18, 2009 10:39 am
by PSL184
Excellent - Thank you
Posted: Mon May 18, 2009 2:10 pm
by stanley0070
