7
When the display reaches 4.0 it will scroll back round to 0.1 .When
this has been set correctly, press and hold down the red button.
The decimal point will now shift to the left and display the remain-
ing millimetres of circumference.
To change the number, press the red button momentarily to incre-
ment it one at a time, or press and hold and the display will count
up quickly. When the display reaches .099 it will scroll back round
to .000 To exit the routine simply switch off the instrument.
2) Special calibration:- If you require to trigger off a target with 10
teeth, then set the trigger points number to 10 in the SET TRIGGER
POINTS menu.
If the target is running at wheel RPM then simply enter the tyre
circumference as described above. However if the target is driving
a differential, then using a calculator, divide the circumference of
the tyre by the ratio of the differential, and enter this value as the
circumference, as described at the beginning of this section.
If you require to trim the accuracy of the speedo because for
example the differential ratio is not accurately known, and you
have determined that the speedo is reading say 2% high, then
using a calculator, subtract 2% off the currently stored circumfer-
ence value and enter this new value as described in the at the
beginning of this section. The speedo will then read 2% lower than
previously.
Alternatively, if you have access to an accurate 1/4 mile marked
road, use the Auto calibration mode described further on.
rcP (RECALL PEAKS):- If you are in record mode, then you need
this option to gain access to stored maximums, as the red button
during speed measurements is used to store snapshots. Simply
press and hold down the red button to view stored maximum, and
release the button to return to the menu.
rEC (RECORD MODE on/off):- Press and hold down the red button,
after 2 seconds the display changes to the desired option.
When this mode is on a small REC symbol will displayed in the
top left of the speedo display, and pressing the red button during
speed measurements will cause the instrument to take a snap-
shot of your current speed instead of recalling the stored maxi-
mum speed IE it will store the current speed at the instant that you
pressed the button, into the instruments memory.
Up to 52 snapshots can be taken on the standard speedo and each
one is given a Record number. These numbers are displayed while
pressing the button to take a snapshot as r followed by the record
number. After you have taken a snapshot the record number will
increment to the next one. When you have reached 52 it will return
back to 01 and overwrite the previous data.
Each time you switch on the instrument in the record mode , it will
