Valid data checking help please… Hysteresis Question ?

[Demon]

Close, can't monitor during PAUSE 500.

InAlarm var WORD
LOOP VAR WORD

START:
.
.
' Tweak 5000 value to take into account
' time to take temp reading.
.
.
InAlarm=0
FOR LOOP= 1 TO 5000      ' Loop 5 seconds
...READ TEMP
  IF temp <2 THEN
    InAlarm=InAlarm+1
    PAUSE 1           ' Pause 1 millisecond
  ELSE
    InAlarm=0
    LOOP=5555      'Reset loop
  ENDIF
NEXT LOOP
IF InAlarm=5000 THEN ALARM     ' Check if InAlarm incremented during entire 5 seconds
GOTO START

Personally, I'd use a timer in Darrel's instant interrupts to control 5 second lapse.

Robert