Testing mechanical watches
© Elma GmbH & Co KG
BA/watch-matic lII/GB/0108
15
8.7 Test
Mode
You can choose among 3 settings:
Standard test mode for all watches with Swiss lever
escapement.
Stnd
Only rate measurement to draw diagrams and measure rates
even with watches giving off a bad or unusual beat noise (i.e.
watches with cylinder- or chronometer escapement).
Rate
This mode must be set, if watches with coaxial escapement
should be measured. It ensures an accurate measurement of
the amplitude.
Spe1
This mode must be set, if watches with AP escapement should
be measured.
Spe2
This mode must be set, if watches with a special escapement
should be measured.
Spe4
9
Testing mechanical watches
9.1
Continuous Mode
Select the test mode
Cont.
with the
value
buttons.
Place the watch to be tested on the microphone in such a way
that the crown lies between the metal leads of the signal
sensor.
The LED
sig.
flashes in the rhythm of the beats of the watch,
thus showing that watch’s signal is received. The tracing of the
diagram starts automatically.
The diagram is continuously drawn in this mode. Turn the
microphone to the needed control position. Due to the display
principle of the LCD graphic screen, the following differences
relatively to drawing a graph on paper strips have to be
mentioned:
The points of the diagram are shown as screen dots (pixels) on
the display. These dots are placed at a distance of 0.5 mm from
each other. An inclined diagram is thus always shown as
a staircase with 0.5-mm steps; the distance between the lines
will of course be a multiple of
0.5 mm.
This effect only shows in the case of accurate watches and low
diagram resolution. It is gene-rally overshadowed by the natural
irregularities of the diagram.
We therefore recommend always to use a resolution which
perfectly fits the quality of the watch and which is the highest
possible.