Need help with C02 injector

[DonkDBZ]

Ok I sealed my room put a window ac in. sealed any spots that would leak on the unit with spray foam. I got a hydrofarm c0sys the .2 to 1.0 one

There instructions

PROGRAMMABLE TIMER SETTING
Set your timer to go on continuously for 2.5 hours each day when your
lights turn on. This time period will bring your room level close to the
desired range. After this period, set the timer to go off for 15 minutes,
then on for 15 minutes. Repeat this on/off cycle throughout the lighted
period until 1 hour before the lights turn off.

DETERMINING A FLOW RATE

This is the basic formula for determining flowmeter settings:
cubic ft. of growing area x .0012 = A A ÷ 3 = B B ÷ 2 = flowmeter setting
To determine the flow rate for your growing area, follow the steps
outlined below.

Step 1 - Determine the cubic volume of your area:
Room height x width x length = cubic volume
Example: 8' high x 10' long x 10' wide = 800 cubic feet

Step 2- Take desired level of CO2 (1500 PPM) and SUBTRACT existing
CO2; 1500PPM - 300PPM = 1200 PPM. This is the amount of CO2
you need to add to raise the level to optimum.

Step 3 - Multiply your room volume x .0012 (1200 PPM) to determine
how much CO2 to add to your area.

Example: 800 cubic feet x .0012 = .96 cubic feet.
For practical purposes we will round this off to 1 cubic foot. This is
the quantity of CO2 to add in an 800 cubic foot size room to reach the
desired 1500 PPM level.

Before continuing on to the next steps the following assumptions need
to be established:

FIRST ASSSUMPTION: The average growing area enriched to
1500 PPM of CO2 will return to normal levels in about 3 hours
due to plant usage and room leakage.
SECOND ASSSUMPTION: When calculating the flow rate for any
growing area, this usage and leakage of CO2 should be compensated
for in that particular area.

Step 4 - Now for the 800 cubic foot room, we take the approximately 1
cubic foot of CO2 and divide it up over the 3 hour average period into
1 hour increments. There are 3 one hour periods in 3 hours.
1 cubic foot ÷ 3 = 1/3 cubic foot of CO2 (.333)

This means that every hour an 800 cubic foot room needs 1/3 (.333)
cubic foot of CO2 to replenish it back up to 1500 PPM. Because our
system operates on a 15 minute OFF / 15 minute ON cycle, the flow
rate setting should allow 0.1665 (or 0.2) cubic foot of CO2 to be emitted
within each 15 minute ON cycle.

To arrive at the appropriate flow rate setting we need to divide .333
by 2 (there are two 15 minute ON periods per hour) to reach the flow
rate per hour (.333 ÷ 2 = 0.1665 cubic feet per 15 minutes of flow).
For practical purposes, round this up to 0.2 cubic feet. This is the
flowmeter setting.

After following the regulator adjustment steps, set the flow with the
flowmeter adjusting knob as described above.




Ok back to me. My room is 580 cubic feet So i need .7cf to get my 1200
divide by 3 to get .23 per hour.

So my question is why the 15min on 15min off. Would is be ok to leave the flow meter on for 12 hours at .23

I don't get the section I bold and made blue. If you wanted .333 per hour with 2 15min periods wouldn't you multiple by 2 to get flow rate?

Would turning on my sys for 12hours start make it freeze up or anything?

 

[DonkDBZ]

oh yeah anybody have link to Light/CO2/Temp charts been looking cannot find thread.

 

[sparkjumper]

Man when I read threads like this I'm glad god created controllers lol.I wish I could help but having used a cyclestat for years I see no use in these equations and timers.They dont take into account the plants numbers,size or growing phase for one thing,you will just get massive co2 fluctuations.If you can get the cheapest controller out there the PPM-3 you will be doing yourself a real solid

 

[DonkDBZ]

I plan on getting a controller when I get the money. Trying to make do for now.

 

[MarquisBlack]

Whatever you do, undershoot the levels. Anything over normal CO2 levels will show an increase in plant growth, but exceeding 2000ppm or so can seriously slow things down.

When you decide to get a controller, look at the Sentinel C-PPM 1

 

[sparkjumper]

Marquis I dont doubt your word but would like to see literature on the subject.Everrything I've read claims no harm will be done to the plants until around 5000PPM and anything over 1800-2000PPM for most plants the excess will not be utilizied but wont slow things down or be a negative,its just a waste from what I gather.

 

[MarquisBlack]

Oh yea, probably not detrimental at 2000ppm, but I've crossed into 3000 and noticed slower growth. This was a rather small space (3x5ft) so the swings were almost uncontrollable. From what I've heard, 5000ppm is when actual death of the plant is possible.

Citation: http://books.google.com/books?id=KQ...6HtbEP&sa=X&oi=book_result&ct=result&resnum=6

However, an increase in the carbon dioxide concentration to levels above 3,000ppm produced inhibitory effects.

 

[sparkjumper]

Thanks bro thats interestin.In over two years I've had my cap PPM-3 stick on me one time after a couple months of non-use.I went up to about 3600PPM but I caught it quick.I havent had a lick of trouble since.I just unplugged it and plugged it back in,no problem.Didnt even have to recalibrate which I thought was killer.I've haerd some negative things about the cap PPM-3 but its great so far.I love the fluctuation of no more than a couple hundred PPM man that turned a corner for me

 

[DonkDBZ]

well besides the fact that I need a controller when I can afford it. Would I cause any damage to my setup by just leaving it flow at .2 for lights on?

 

[MarquisBlack]

well besides the fact that I need a controller when I can afford it. Would I cause any damage to my setup by just leaving it flow at .2 for lights on?

Personally, I would leave it on at .2cf for 15 minutes on/15 minutes off, and after a day, use a CO2 syringe test kit to test your concentrations, then tweak from there.