| | The Witschi Watch Expert2 is a new machine by Witschi.
User friendly, modern electronic test instrument for mechanical watches. The LCD graphic display shows the beat trace, as well as numerical data on the rate, beat error, and amplitude.
The WATCH EXPERT II is based on new measuring
technology by Witschi, called Chronoscope. The instrument offers the watchmaker all possibilities for testing mechanical watches.
A diagram of the watch beats is presented completely
silently on a LCD graphic display panel. Numeric values for
the rate accuracy, amplitude and beat error are automatically calculated and displayed numerically, i.e. the diagram no longer has to be manually evaluated.
Operation for conventional watches is largely automated.
The measurement parameters can be manually selected for
special watches or for special measurements.
With the new measuring mode, watches with a special
escapement system can also be measured.
The Watch Expert 2 is today the only homologated Instrument for Omega Coaxial escapement.
The WATCH EXPERT II provides all the test facilities that
are needed for a competent repair service for mechanical
watches. The instrument is mainly intended for use in
service centers and in leading specialist watch suppliers.
Technical Data
• Measuring possibilities: rate deviation, amplitude and
beat error of mechanical watches. Diagram of the beat
noises.
• Beat number: automatic selection of all common beat
numbers. Manual beat number selection of less common
beat numbers.
Manual selection of any beat number in the range
between 3'600 to 36'0000 b/h. Determination of an
unknown beat number.
• Gain control: automatic. Manual control facility for
watches with stray or unusual beat noises.
• Diagram: presentation on a LCD graphic display.
Resolution: 256 x 64 dots.
Time scale selectable; from 1 up to 9 mm/ms (zoom).
• Recording speed depends on the beat number, 0.56 mm
per watch beat.
Visible diagram length: 143 mm.
• Rate measurement: numerical display in s/d.
Resolution 1 s/d, measuring range ± 999 s/d or
0.1 s/d, measuring range ± 99.9 s/d.
• Amplitude: numerical display in degrees.
Resolution 1°, measuring range from 70° to 360°.
Lift angle adjustable from 10° to 90°.
• Beat error: numerical display in milliseconds.
Resolution 0.1 ms, measuring range 9.9 ms.
• Selectable measuring time for numerical results: 2, 4, 8,10,
20, 30, 60 s and automatic selection of the shortest
possible measuring time.
Continuous renewal of the average values every 2 s over
the measurement period. Display on the screen of the evaluated
part of the rate measurement diagram.
• start/stop function: enables the current screen display to be
stored as long as required at any time.
• Acoustic check: loudspeaker to hear the beat noises.
• Result print-out: RS232 interface port for the connection of
a printer or a calibration system.
Print-out of the numeric results or a graphic print-out of
the displayed diagram.
• Time base: high frequency quartz time base.
Stability: max. +/- 0.08 s/d between 20° and 40° C.
• Display: LCD graphic display 256 x 64 dots.
• Housing: plastic housing, light grey.
Dimensions: 250 x 135 x 101 mm.
Weight: 2.1 kg.
• Mains connection: mains adapter for 230 V~ or
120 V~, 12 VA.
• Stand microphone movable for any test position, suitable
for watch movements and watches with or without
bracelet.
Accessories
• Clamping microphone for wall clocks.
• Optoelectronic sensor for pendulum clocks.
• Tripod for optoelectronic sensor.
• Printer: DP-1014.0132A, with graphic mode and universal
mains adapter, 90 V~ - 264 V~.
• Switchbox: to connect 2 instruments on the printer
DP-1014.0132A.
• GPS Receiver.
Recalibration of the Watch Expert 2 is possible by a GPS Receiver. (Not included with the Watch Expert 2)
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