7. Troubleshooting
STACK Dash-2 Kart Logger
40
Users Guide
Symptom
Possible Cause
Remedy
Notes
Ignition system
pulses per
revolution not
same as number of
cylinders
Reconfigure system to
correct number of pulses
per revolution.
Displayed speed value
too high or too low by a
constant %-age
amount.
System configured
with wrong number
of targets per
wheel revolution
Reconfigure the system
with correct values
System configured
with wrong
circumference.
Typical wheel
circumference is
900mm / 35” for
a kart
No speed reading
Speed reading erratic,
value jumps high or low
Faulty sensor
and/or wiring
Rotate the wheel by hand
and check the speed
display on Layer 2
Incorrect sensor
gap
Check that the gap is
approximately 2 mm
Speed reading dies
after a short time
Ambient
temperature too
high
Shield the sensor from
radiated heat from brakes
and bearings. Insulate
sensor from conducted
heat with fibre washers.
Duct cooling air around the
sensor
Maximum
temperature for
correct
operation of the
wheel speed
sensor is +80
°
C
(175
°
F)
No alarms for
(temperatures) being
displayed
The alarms have
been switched off
Switch on the required
alarms
Alarms only
operate when
the engine is
running above
the gate value.
The engine RPM
gate value is set
too high
Reset the RPM gate to a
lower value.
The wiring is too
close to HT leads,
or HT leads tied to
isolated metal work
to which Dash-2
wiring is also tied.
Run Dash-2 wiring away
from HT leads
Recommended
Minimum
spacing 75mm
(3.0”)
