taximeter to the car battery, you effectively eliminate possible problems from
installation onward.
.
Finally, while the taximeter does provide filtering of noise signals (see section’s 4.4.6,
4.4.7 and 4.4.10 for more information), it is our experience that grounding to the
battery is your best protection against noise being interpreted as motion signals, and
ensuring that the proper motion signal is detected.
If by chance, you still encounter noise issues with your installation (i.e. the taximeter
registers distance while the vehicle is stationary) we have an inexpensive signal
conditioner device that will help you clean up and/or detect very weak signals. If this
is something that you require, you may call us or go to our website to purchase the
device:
http://recordtechnologies.com/collections/taximeters/products/signal-conditioner
Figure A: Record Signal conditioner that helps eliminate noise issues when reading VSS pulses. Can also
be used to help detect weak signals.
2.2 Vehicle Speed Signal (VSS)
The CG3 will detect motion signals with the following minimum strength:
1) Analog (sine-wave): 700 mV peak-to-peak
Often, where the taximeter has been grounded to the frame or body, the taximeter will appear to operate fine in
the early going, but as time goes on, mileage-detection deteriorates.
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