User`s guide

Configuring the DVR
3–18 700-0035 R004
2. Press the Temporary Power button only once to begin calibration.
Wait approximately two seconds for the system to be ready to start
calibration. Figure 3-10 appears.
To cancel calibration, press the
MENU button.
After driving one mile, the
SPEED PULSE COUNT may be anywhere from 2500
to 150,000, depending on the type of vehicle speed sensor being used.
3. Press the Temporary Power button again to save the calibration value.
The
DVR will return to the Signals/Speed menu and the new calibrated speed
pulse count will be shown.
Figure 3-10 Calibration in progress menu
Important: You can change the speed pulse count to either fine tune the speed display,
or to set a known value from a similar vehicle. This is useful if a fleet consists of several
models of the same bus. By calibrating one bus, the speed pulse count can then be entered
into the DVRs for all of the similar buses. However, if a DVR is moved from one bus to
another, the speed may have to be recalibrated due to differences in transmissions, tires,
and other factors.