Never mind... found the answer and all seems to be working well 😄
WaterLvlCalc - [ID 0012][Parent 0013]
If
'Alarm / House Alarm System / KitchenKeypad' is switched F4
Then
$ElkWtrVoltage = 'Alarm / House Alarm System / Water Level' Voltage Volts
Wait 2 seconds
$WtrGallons = 10
$WtrGallons *= $ElkWtrVoltage
$WtrGallons *= $SlopeDiv10
$WtrGallons -= $Offset
$WtrLvl = $WtrGallons
$WtrLvl /= $GallonsPerInch
Set 'Alarm / House Alarm System' Display Message
$State_LvlCalc = 1
Wait 10 seconds
Set 'Alarm / House Alarm System' Clear Message
Else
- No Actions - (To add one, press 'Action')
Wait for a trigger to calculate cistern $WtrGallons (= 10 x $ElkWtrVoltage x $SlopeDiv10 - $Offset), $WtrLvL = ($WtrGallons / $GallonsPerInch), and then display the level on the Elk Keypad
