WX-DC-01 is a cross-coil electronic tachometer movement. It does not have the annoying oscillating and damping oil leakage.
No resonant oscillatingLong life, no damping oil leakage and no adjusting varistorHigh accuracy with multipoints adjustable independentlyWide deflection angle (more than 270o)Wide working voltage: 11~15VDC, no damage even as high as 100VFit the installation with popular move-coil movementApplication: tachometers for motorcycle, ATV, electric bicycle etc
In the motorcycle instrument industry, electronic tachometers are widely used to replace the traditional mechanical tachometer nowadays, but the popular used moving-coil tachometer will be oscillating due to resonance, and worse more, its damping oil will leak, as a result, its lifetime is reduced dramatically.
Using cross-coil (moving-magnet) to drive the pointer, WX-DC-01 electronics tachometer movement does not have the annoying oscillating. Using the patented separate damping oil container, it almost eliminates the fatal oil leakage and a long life time is accomplished.
Besides, WX-DC-01 movement uses on-board MCU to sample the input signal and to drive the cross-coil, and can be adapted to different scale panels with software. Multiple points in the measuring range can be optimized independently to reach high accuracy and linearity. WX-DC-01 has true wide deflection angle to be more than 270o. It can work properly from 11VDC to 15VDC, and even can work for a while as high as 100V without damage, which means it can still work when motorcycle loses both battery and regulator, and only magneto works. In this case, the magneto will produce high fluctuating voltage power. WX-DC-01 fits the instruments once using the popular moving-coil movement.
Working conditions
| Min | Typical | Max |
DC Power supply voltage(V)(note1) | 11 | 12 | 15 |
DC Power supply current (mA) | 35 | 53 | 75 |
Input signal frequency(Hz) | 10 | - | 200 |
Input signal peak voltage(negative pulse, V) | -250(note2) | - | - |
Ratio of RPM/input frequency | - | 60 | - |
Temperature(oC) | -20 | 25 | 55 |
Note1: it can still work below 11 and high than 7V, but the accuracy can not be assured; it can work higher than 15V for a while without damage, but the voltage variance should be less than 5V/s.
Note2: the pulse width in the peak voltage should be less than 500us.
Wiring harness
Black wire: positive of DC power supply
Green wire: DC return of power supply
Yellow/Black wire: input signal
All the above three wires have the length more than 110mm and diameter 2mm. One metal plug(diameter 3.5mm) for each wire in the other end.
RPM measurements
Conditions: 12V DC power supply, 12V amplitude input signal, temperature 25oC, relative humidity 48%
RPM change direction | RPM | Absolute error (Max. %) |
| | 1000 | 5.00% |
| | 2000 | 2.50% |
| | 4000 | 2.50% |
| | 6000 | 4.17% |
| | 8000 | 1.25% |
\/ | 10000 | 1.00% |
| | 12000 | 1.00% |
| | 10000 | 1.50% |
| | 8000 | 1.25% |
| | 6000 | 1.67% |
| | 4000 | 2.50% |
| | 2000 | 2.50% |
\/ | 1000 | 5.00% |
Dimensions and weight
Size: LxWxH=45x44x38mm
Scale panel installation size: 25mm or 28mm
WX-DC-01 movement installation size: 35mm, M4
Diameter of pointer shaft tip: F0.86mm
Weight: 50g
