Need Timer: 15min on, 5 min off, repeat indefinitely

wookinpanub

Thought this would be easy / cheap to find but obviously I'm mistaken :upset:

I have a flood and drain, 3 GB / FT fed with 1 pump connected through an index valve. I'm looking for a simple / reliable / relatively inexpensive timer that I can plug into the wall, plug the pump into, and have it go on for 15 min, off for 5 (forcing the index to the next bed), then repeating the sequence over and over 24 hours a day.

Anyone know of this evidently magical unicorn timer? :bigsmurf:

Thanks!

BuiDoi

Try AliExpress and search for "TIMER".. there are MANY and very cheap options there..
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BuiDoi

http://www.aliexpress.com/item/Clock-control-relay-min-time-period-point-voltage-control-timer-Division-Date-circulation-V2-1-AC/2025606369.html?spm=2114.01020208.3.2.lbszRT&ws_ab_test=201407_5,201444_6,201409_3

Quote:

EAZY-CC clocked relay , compatible with multiple operating modes, each mode can be run independently , to achieve the time period , the time point of control relays, control timing circulation period , a time point and a voltage detector combined control time relay function , discharge instrument function , the number of control functions on Sunday , you can meet a variety of time control, voltage control requirements.

The board CC_V2.1_AC using industrial grade compact power relay , maximum load contacts for 277VAC / 10A or 30VDC / 10A; relay output for conversion type ( normally open, normally closed ) contact form, equivalent to the switch , external control power circuit.

I THINK this is suggesting that it will perform a cyclic timing you need.. at least I think that is what this says

Quote:

Features:

1 Up to 30 groups can be set to time ( segment ) , dotted time ( segment ) to perform the relay pull or release ( on or off ) ,Beijing cycle time can , in accordance with the relative time cycle.

2 independent time relay / timer mode.

3 separable point in time ( segment ) the time relay / timer mode, that is, combinations of the above 1,2 functionFor example, can be set daily at 8:30 relay picks turned two seconds , 19:00 relay picks turned two seconds , or set as follows:8:00 ~ 9:00 executed pull two seconds , releasing three seconds , the cycle 0-999 times, 9:00 ~ 9:30 off,9:30 ~ 10:30 thenPerform pull two seconds , releasing three seconds ,Cycle 0-999 times,You can set the maximum 30 groupsTime period. Note: Pull T1 executed each time period and release time T2 ( timer ) can only be the same group set time .

4 can be set to start daily Monday through Sunday or off , as well as effective control of the number of days when the clock controlled ( 0-99 days after the stop or infinite number of days ) .

5 independent voltage detection control mode, the voltage can exceed the upper and lower limit of detection can record Beijing , can be used as a voltage detection control ,Discharge instrument functions. Voltage detection control may be subject to time ( segment ) simultaneous control , and control the start time relay .

6 low-power design , digital control can be set to automatically shut down , minimum standby current of 10mA / 12V.

7 high-precision clock circuit , when the error is less than 2 seconds to go / day , and set calibration errors.

8 have to restore the factory setting function.

at the price, you can't complain and the BIG uncertainty, is if you can work out the programming.. :dontknow:

I just ordered one..
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Gunagulla

CN102 is the timer you need, I have been using one for a while, and have purchased 3 more on ebay recently, from 3 suppliers in HK and Singapore, all 3 were selling their last one in stock.

You can independently set on time and off time to the second, up to 30 hours, and they are simple to program.

BuiDoi

Hay Gunna.. good find.. and you can vouch for it's function..

http://www.aliexpress.com/store/product/220V-AC-power-CN102A-cycle-timer-countdown-seconds-when-the-control-switch-loop-control-Mono-countdown/825977_1788365923.html

And there is a case

http://www.aliexpress.com/store/product/CN101A-CN102-Timer-switch-protective-cover/825977_2029537284.html
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And the benefit.. you just wire it up.. no silly boxes and fabrication ....
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Gunagulla

hahah, got to love the Chinglish descriptions:

2 ... do not look at the manual , the manual is a conventional type of operation is only done for illustrative purposes )

and then point 5:

5 ... please read the manual. Held in abeyance .

My one has been working without problems for quite a few weeks, but I'm not working the contacts hard- just switching a low current control circuit.

When the other ones turn up, I'll be switching a 780W 240V pump (I might use a relay for that), and also a Pondmax 8000, and a solenoid on the swirl filter. I'll probably get another for the backup pump on the small system too, and a couple of spares.

BuiDoi

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Indeed .. you get such stupid stuff in their classifieds..
But they are trying and getting better..

I believe I found the manufacturer, and will try getting some myself..

KISS... it meets all needs for a period timer - I think

And they are claimed as 16A..
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wookinpanub

Yup, never would have thought to look at that site.... :mrgreen:

I had a wiring question, given the pump currently just plugs into a wall outlet. Being electrically stupid, how exactly does one take some thing like this, be able to use a wall outlet for power, then provide that power to the pump in such a way that the pump can just plug into it like a standard wall outlet?

I do have some electrical experience, but more often than not - bad. So type slow and don't be afraid to use small words.... :thumbleft:

Gunagulla

Timer power to operate the electronics and relay requires 12V DC- easy to do.

Load terminals need to break the active wire, so you need it in an insulated box with male and female plugs on flying leads, or mounted caravan socket and a regular GPO, and all connections on the inside done properly and safely.
In Australia this is 240V, and really should be done by an electrician to comply with the law, I dont know what the regs are in CO, but don't mess with it if you have "bad electricial experience"!

BuiDoi

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and there is a 240V version - a deal more appropriate when switching 240V pumps..

I think that I have found another device that is DIN Rail mounted... something that would be better for me..
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wookinpanub

If it's DC, and my pump and outlet are both AC, then I don't think I want to go through the effort and complexity and attempting to do that dual conversion.

Any other ideas on a timer that is AC based, plugs into a standard wall outlet, and allows a 3 prong pump cord to plug into it?

wookinpanub

So after researching / making a number of calls, I found the following:

There are AC type plug in timers that can handle the timings described above, for example the Titan Controls Apollo 2 / Apollo 12 or the C.A.P. ART-DNE. Both are, however, in the $70+ range.

After reading further in regards to timing effects on F&D systems, the general consensus is the more frequent the flooding / draining cycles the better with an average 15 min flood / 45 min drain. However it appears there is limited impact if those cycles extend somewhat, and with my setup (assuming using a 'regular' mechanical timer with 15 min increments) this would be a 15 min flood and a 1hr 15 min drain. As the primary benefit of the more frequent cycle times is the aeration, filtration of the water in the FT's, my setup of all three tanks plumbed in serial to one pump ties into this very well. In essence all 3 tanks will be pulled from on every 'on' cycle and with a shared return drain plumbing all 3 also get aerated and replenished on every single drain cycle. In my case, I believe I can get away with a more simple mechanical timer (like the Tork SA110) for roughly $15.

Thanks to all for the inputs.

BuiDoi

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CN102 is a generic number.. for different voltages..

http://www.aliexpress.com/wholesale?SearchText=cn102&CatId=0&catId=

here you will see different voltage options

http://www.aliexpress.com/item/2pcs-220V-AC-Digital-Time-Switch-CN102-Single-and-Double-Coundown-Timer-Switch/32345417015.html?spm=2114.01020208.3.2.q9Pj5b&ws_ab_test=201407_5,201444_6,201409_3

and here is two for about $27

and here with case for likely 13 bucks

http://www.aliexpress.com/item/AC-220V-Digital-LCD-Power-Programmable-Timer-Time-Switch-Relay-16A-with-Cover/32311502206.html
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Backyard Aquaponics A place to discuss aquaponics

Need Timer: 15min on, 5 min off, repeat indefinitely

Backyard Aquaponics
A place to discuss aquaponics