Question about Hardware & Accessories
Open following link to identify TM311 timer:
1) First of all, you would need more turquoise 107TN222 ON and red 107TN221 OFF trippers.
2) BUT big problem is that TN311 time dial is divided into half-hour segments, so minimum on-off is probably 1 hour since it takes 2 trippers for on-off cycle, and width of 2 trippers is same width as 1 hour.
3) Open following link for plug-in timers with 15 minute segments shows Woods 49664 & Stanley 31192 & Sylvania SA110
4) Notice the 49664 dial, that each hour is represented by 4 segments. This says timer on-off period is 15 minutes.
To set this timer, you would pull up all segments around the dial, and then push down 1 segment for each hour that you want timer to turn on for 15 minutes.
5) TN311 has 3 prong grounded outlet, Woods 49664 has 2-prong outlet.
6) Stanley 31192 timer and Sylvania SA110 have 3-prong grounded outlets and 15 minute intervals.
7) You cannot accomplish 15 minutes intervals for 12 periods a day with programmable digital timer.
Most digital timers allow 1 minute program times, but are limited to 6 or 7 programs, and not the 12 separate on-off periods needed for your project.
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Posted on Mar 18, 2011
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Posted on Jan 02, 2017
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