Radiometrix Ltd.

KFX2 data sheet

Page 3

Functional description

Keypad numbers refer to relay outputs of the KDEC decoder board (refer to KDEC data sheet).

The led is illuminated each time any of the buttons are pressed to indicate transmission, either

momentary or, continuous transmission up to a maximum of 30 seconds.

Battery voltage is monitored and will give a low battery indication at the receiving end when the voltage

drops to 4v +/- 5%.

Power is supplied by the use of 2 CR1220 3V (6V total) Lithium button cells to achieve long battery life

over extended periods.

Battery Replacement

The KFX uses 2 CR1220 lithium button cells, these are stacked into the holder one on top of the other

with the (–) terminal facing down and the (+) sign uppermost for both cells.

Reverse polarity protection is built into the KFX to prevent damage to the circuitry.

To open the case care should be taken not to damage the casing, the best method is to use a “flat” headed screwdriver

inserted into the key ring holder area where shown, and then, a gentle twisting action to “pop” the casing apart.

The case is re assembled by simply aligning the two halves together and then firmly snapping them together by hand.

Battery location

Screwdriver