DS 19 OPERATION No. DS 212-0 Checking an ignition coil. Op. DS 212-0 142
TOOLS
CHECKING A COIL (see Pl. 33).
1 To mount the coil on a test bench:
Connect the positive terminal of the coil to the positive terminal of a 6 volt battery and the negative terminal
to a DS 19 contact breaker (contact gaps set to 0. 4 mm) fitted with condensers in good condition.
2 Connect 1. The secondary outlet “a” to the insulated terminal of the first spark gap (A) which is set during the test.
2. The secondary outlet “b” to the insulated terminal of the second spark gap (B) set to 1 mm throughout
the test.
3 Operational conditions
- At 2000 r. p. m. contact breaker, the minimum length of spark (between the points of the spark gap (A)
should be 5 mm.
- At 60 r.p.m. contact breaker, this length should be 11 mm cold and 9 mm hot (after 30 minutes running).
NOTE - Do not attempt to obtain a longer spark by increasing the terminal gap of the spark gap (A), because this
will cause internal sparking of the coil and rapid deterioration.
4 Test the two outlets “a” and “b” of the coil successively.
IMPORTANT NOTE - One can proceed as indicated above. It is, however, preferable to use the bench designed
by our Service Department and sold by Etablissements de Sarello, 7 bis Villa Berthier, Paris, 17e) (see Pl. 34).
5 To check the continuity of the primary winding
Supply the test bench from a 6 volt battery.
Connect the primary wires on to the primary terminal (A) of the coil. Switch on the main switch (B)
(top left-hand) and put the two-way switch (C) in feed position for the light (D) (pull downwards).
Test : The filament of the lamp should glow without bright fluctuations, likewise, by moving the primary
terminals of the coil.
6 To check the operation (see Pl. 34)
a) Secondary outlet No. 1.
Connect the secondary outlets (E) of the coil to the two spark gaps. Start the motor by means of the motor
switch (F) (top right-hand) and by immediately pressing on the button of the starter switch (G) (lower right-
hand).
Put the two-way switch (C) in the position to supply the contact breaker (towards the top). There should be
practically no misfires in the sparks with the spark gap set at 8 mm. Put the two-way switch in the neutral
position.
To Next Page
Loading...
