Is the dial setting on your time delay relays linear? How do I find 10 seconds with a range of 1-30 seconds?
Since most time delay relays use a potentiometer to adjust the time delay, the actual dial setting is not linear. Any markings along the dial are normally for reference only. To find a 10 second delay within a 1-30 second range, you can approximate the position as one-third between “MIN” and “MAX”. But this is just a starting point. You must check the actual delay and then tweak it by adjusting the knob to finally end up with the 10 second delay you need.