Witschi Electronic Ltd
Analyzer Q1
Page 21
11.3
Result Display
The positive and the negative watch pulses are represented alternatively as an oscillogram. Every third
pulse is drawn with watches having a period of 1 second; every single pulse is drawn with watches
having a longer period.
In addition, the pulse width and the chopping level (Drive Level) are displayed in numerical form.
12
TEST OF COIL RESISTANCE AND COIL INSULATION
12.1
General Introduction
The resistance test is primarily used to detect breaks or short-circuits in the motor coil of analogue
watches or insulation faults between the coil and its core or the coil and the plate. The Resistance
(coil) test, however, is also useful for testing the continuity and insulation of connections, strip
conductors and switches.
12.2
Procedure
Please note: The resistance test is performed with a very low voltage, to avoid damaging the watch
because of a wrong connection.
It is necessary to remove the battery from the watch to perform any resistance test.
Select the
Resistance (coil) test
function in the main menu.
Coil Resistance
Connect both wiring points of the coil to the movable contact probes or to the probe tips. The
polarity is irrelevant.
If the measuring points cannot be located, refer to the data sheet of the module to be tested.
Coil insulation
Connect the movable contact probes or the probe tips to a wiring point of the coil and to the
movement plate.
