Adjustment of the generators
90
SM/Transsonic_LC/1104/D © Elma GmbH & Co KG
16.4 Adjustment on T310 – T420H; LC20H – LC30H
The adjustment on these units is carried out at the control coil.
The control coil (see Illustration 16.4.1.D) has several wraps.
The ends of a wrap are soldered to a fixing point (see
Illustration 16.4.2.E). If necessary, unsolder the relevant cable
and increase or reduce the number of wraps on the control coil.
It depends on the relation between the signal graphs of the
oscilloscope whether or not an adjustment is required.
See possible graphs as indicidated in Illustrations 16.2.1 - 3.
In order to check the adjustment proceed as follows:
How to proceed
1. Measuring set-up as described in section 16.
2. Connect the probes as shown in Illustration 16.4.
3. Slowly increase voltage; observe the oscilloscope and the
current consumption during the process.
4. Check the graph and compare with possible graphs as
indicated in Illustrations 16.2.1 - 3.
If graph and phase are as indicated in Illustration. 16.2.1.,
no modification is necessary.
a. If the current graph rises before T1 as shown in
Illustration 16.2.2.:
Reduce the number of wraps of the a.m. coil by 1 wrap
at a time until the graphs correspond as shown in
Illustration 16.2.1.
Caution: Do not reduce the number of wraps under the
minimum of 2 wraps.
b. If the current graph rises after T1 as shown in
Illustration 16.2.3.:
Increase the number of wraps of the a.m. coil by 1 wrap
at a time (observe sense of coiling) until the graphs
correspond as shown in Illustration 16.2.1.
5. Check the generator power consumption and compare with
the values indicated in the table in section 16.3.
In case of deviation see instructions given in section 16.2.
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