User's Manual

User Manual for ZJTJ-BR3-HQ03 Travel Recorder
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Figure: 2-4
2.6 Parameter setting
The product parameters can only be set by issuing
corresponding instructions via the corresponding platform.
2.7 Pulse coefficient calculation
After connecting the pulse speed line of the recorder,
drive the vehicle for about 10 minutes at a speed of 50 km/h. If
the error of the instrument speed and the speed of the recorder
is less than 5%, the pulse coefficient doesn’t need to be
modified. Otherwise, the pulse coefficient needs to be modified
by issuing instructions via the platform. The calculation
formula for the new pulse coefficient is as follows:
Front-loaded vehicle: New pulse coefficient = Vehicle
speed displayed on the instrument /Vehicle speed displayed on
the travel recorder* Pulse coefficient. Back-loaded vehicle:
New pulse coefficient = Vehicle speed displayed on
GPS/Vehicle speed displayed on the travel recorder* Pulse
coefficient.