HealTech Electronics Speedohealer v4 - Reset; Switching between A and B calibration value; Activating the Km;h to MPH conversion feature; Test mode

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3.4 Reset
There is no need to clear the memory before programming a new calibration
value. You can overwrite the previous setting easily.
However, if you wish to clear all settings and go back to defaults:
Press BOTH buttons on the unit and keep it depressed until [E] is indicated.
When the unit is powered up with default parameters, [A 0] is displayed.
This means memory bank A is active with no calibration. The unit will work in
Transparent mode, i.e. the speedometer will read the same as with no SH
installed.
3.5 Switching between A and B calibration value
Press SET until the active memory bank ([A] or [b]) is displayed and keep it
depressed for one more second, until the value switches.
 When you program a calibration value (chapter 3.2), you can program the value
in the active memory bank only.
3.6 Activating the Km/h to MPH conversion feature
Press SEL until the actual mode ([C] or [-]) is displayed and keep it depressed for
one more sec, until the value switches.
When Km/h to MPH conversion is active, the indicated speed and distance travelled
will be converted, but the displayed units of measure (km/h and km) won't be
changed.
 It is possible to switch on/off the Km/h to MPH conversion only.
If you wish to use MPH to Km/h conversion, you have to program +60.9% (1.609
multiplier) on top of the calibration value you need. However, keep in mind that
your speedometer’s maximum reading will not be changed. E.g. a speedo with
160 MPH highest reading will not be able to show over 160 Km/h after conversion.
3.7 Test mode
In Test mode, you can check whether the SH is installed and working properly.
To initiate test mode:
- Make sure the ignition is OFF (unit is powered down).
- Press SEL and keep it depressed while you turn the ignition ON.
[t] (test) is now indicated. Release the button.
The speedo should indicate a number other than zero. If you wish, you can
change the speed reading in 9 steps by pressing SET repeatedly.
- Rotate the wheels. [t] should be blinking as the wheels turn.
- Press SEL to exit from Test mode. The unit will work normally.