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fi
dential. Any disclosure, copying, distribution to third
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18
The K-Constant
(Car Transmission Ra o)
The “K Constant” is the number of pulses per Kilometer emi ed by a transducer and received by a taximeter.
K Constant = Pulses/Kilometer
The pulses can be emi ed by the car’s electronic transducer or, if the car is not provide of it, by the Digitax mechanical
one or by a third part interface. This constant can be known or be tested on road.
How to
fi
nd out the K-Constant value (Autotest)
Follow this procedure to
fi
nd out the car tansmission ra o (K-constant).
For a right procedure it must be done in a road with a carefully marked distance of 1 Kilometer(default).
Align carefully the car’s front wheels with the test distance‘s start line.
Take out the taximeter programming cover
Select
For Hire
posi on.
Insert the
Service Programming Key (1)
in its slot.
Press
K2
and
K3
bu ons at the same me.
The ATTEST text appears on main display (
3
)
The main display (
3
) shows the programmed K-Constant value.
The extras display (
5
) shows the meters to be covered for the Autotest
Press
K2
bu on to increase the pulses/km number.
Press
K1
bu on to decrease the pulses/km number.
By pressing
K1
+
K2
at the same me the programmed K-Constant
becomes 1000
Press
K4
to save the programmed value
Press
OP
bu on to end the procedure and go back to
For Hire
posi on
Take out the
Service Programming Key (1)
from the taximeter.
Take out the taximeter programming cover
Select
For Hire
posi on.
Insert the
Service Programming Key (1)
in its slot.
Press
K2
and
K3
bu ons at the same me.
The le display shows “A est” for a few seconds.
Press
K3
bu on to reset all meter’s counters.
The secondary display (
5
) will show the value 0.
Start driving at 30 km / hours maximum.
Drive to the Autotest Finishing Point (1 Km).
Once the Autotest Finishing Point is reached, press
K4
bu on to
fi
nish the
Autotest. Now the taximeter will calculate and record the new
K- Constant
.
The main display (
5
) will show the new K-Constant value. The secondary
display (
5
) will show the number of pulses generated during the Autotest.
Press the
OP
bu on in order to
fi
nish the Autotest procedure and come
back to
For Hire
posi on.
Take out the
Service Programming Key (1)
from the taximeter.
How to program a known K-constant value (autotest)
ATTEST
1000
1000
100
1000
900
1000
ATTEST
1000
1000
995
0
680
680
1 Kilometer at Max 30 Km/Hour
Autotest Finishing Point
Autotest Star ng Point
pulse/dist.
pulse/dist.
Summary of Contents for M1 mdt
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