 printable version
Check the output current
This test determines whether the generator generates output current equivalent to the rated value.
Preparation Before testing, check and, if necessary, adjust the following items: - The battery. The battery, which is used for checking the output current must be partially discharged. If it is fully charged, the test will give incorrect data due to lack of load; - Alternator drive belt tension; - Fuse-link; - The lack of noise from the generator when the engine is running. Switch off the ignition. Disconnect the negative battery terminal. Disconnect the alternator output wire from the terminal "B" of the generator. Connect the DC ammeter to measure the limit of up to 100 A in series between the output of the "B" and the disconnected output wire. Make sure that you connect the negative probe of the ammeter to the disconnected output wire.
A WARNING We recommend using an inductive ammeter, which measures the current flowing through the wire without disconnecting the cable. The use of such an ammeter reduce the possibility of a voltage drop caused by the unreliable connection to the conclusion ?�B?�. |
Connect a voltmeter to measure up to the limit of 20 V between terminal "B" and "weight". Connect the positive probe to terminal "B" of the generator, and the negative - to the "masses." Connect the engine tachometer and wire - to the negative terminal of the battery. Leave the hood open.
Check Check that the meter reads the same value as the battery voltage. If the meter reads zero voltage may open circuit in the wire between terminal "B" of the generator and the negative terminal of the battery, fuse burns out or disrupted connection with "weight". Start up the engine and turn on the lights. Include a headlight, set the fan heater in position ?�HIGH?�, quickly increase the speed of the crankshaft of the engine to 2500 min -1 and secure the maximum output current value displayed on the ammeter.
A WARNING After starting the engine the power of the charging current begins to decrease rapidly. So check should be carried out quickly to accurately determine the maximum current. |
Result The reading of the ammeter should be above the current limit. If it is lower, but the output of the generator is in good condition, remove the generator from the car and check it out. The current limit for generator A 95 is 63 A.
A WARNING Nominal output current indicated on the label attached on the body of the generator. It varies depending on the load and temperature of the generator. Therefore, the nominal value of the output current can not reach. In this case, leave the headlights switched to discharge the battery or use another vehicle coverage for larger loads. Nominal values can not be achieved if the temperature of the generator or the ambient temperature is too high. In this case, the generator cool down before re-testing. |
Once validated, the output current, reduce the speed of the crankshaft of the engine to idle speed and switch off the ignition. Disconnect the negative battery terminal. Disconnect the ammeter, voltmeter and tachometer. Attach the wire to the "B" of the generator. Attach the wire to the negative terminal of the battery.
| 
