Smiths RVI.1000 SERIES, Инструкция по эксплуатации

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TESTING PROCEDURE
(Using Speedometer Test Apparatus SR/D.221 or AT.9034)
PREPARATION OF THE TEST EQUIPMENT
Using the appropriate adaptor SR/D.312 or SR/D.313 couple a known good
generator TV.1100/00 to the speedometer test apparatus SR/D.221 or AT.9034.
Using a suitable electrical cable connect the output terminals of the generator
to the two left hand terminals of the ignition pulse simulator SR/D.347.
(it is unimportant which way round these connections are made).
Refer to the white pulse lead on the tachometer and connect the lead with the red marker
to the red terminal on the simulator and connect the other lead with the black marker
to the black terminal on the simulator. (It is important to connect these leads in the
correct order).
Connect a well stabilised D.C. supply of 12 volts to the two right hand supply
terminals on the simulator and -. It is imperative that the correct polarity
be observed while making this connection. Wrong connections
will result in the
transistors used in the simulator being instantly destroyed.
Adjustment of the terminal locking nuts may also result in damage to the simulator.
Connect the tachometer to a 14.5 volt. D.C. supply, so that it is wired
for a negative earth. It is important to use 14.5 volts. Voltages less than this
figure can result in errors of up to 400 r.p.m. being indicated on the tachometer.
TESTING
Switch ON the supply to the ignition pulse simulator and the impulse tachometer. Wait
for two minutes and allow the units to warm up. Start the speedometer test apparatus
and operate the tachometer throughout its range.
Check the calibration by running the speedometer test apparatus at 3000 r.p.m., the
tachometer should read as follows:
6000 r.p.m. when calibrated for 4 cylinder 4 stroke application
4000 r.p.m.
“ “ 6
3000 r.p.m. “ “ 8
If the tachometer is found to be out of calibration it should be recalibrated as
described on page S.7.
It should be noted that for all service purposes 2 cylinder 2 stroke application
can be considered as being the same as 4 cylinder 4 stroke and 3 cylinder 2 stroke
as 6 cylinder 4 stroke.
Set the tachometer to read 3000 r.p.m. and then switch the ignition pulse simulator
OFF and ON. When the simulator is switched OFF check that the tachometer reading
falls to zero and when switched ON the tachometer reads 3000 r.p.m. Finally, operate
the tachometer throughout its range.
During the complete testing procedure it is most important to observe the behaviour
of the pointer. The tachometer, when satisfactory, should read with little or no
fluctuation between 500 r.p.m. and maximum; in this range there should be no tendency
for the pointer to drop to zero.
If any unusual movement or fluctuation is observed, the tachometer should be regarded
as suspect and in need of more detailed inspection.
S.4