another co2 on a timer question for a dumbie

[Diamonddss]

Im going to buy a co2 ppm soon but for now i have a 50lb co2 tank, a sentinel regulator and a regular timer.
my room is sealed 6 x 6 x7
i do not understand the charts and setting for how i should set the timer and regulator using a regular timer.
please help a dumbie in laymans terms.

againm just a regular timer

 

[Diamonddss]

this is the only thing i can find. 2.5 hours on when lights come on then every 15 minutes. the rest im confused

c and p
try this:

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 CO
2 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.

 

[caljim]

Diamond, I cant help you with those calculations but i can tell you that if you are pumping gas for 2.5 hrs at a crack you will likely freeze the valve open.

My room is a similar size and at lights on the gas runs on and off for about 2 to 3 minutes to get to 1500ppm. So unless your using a super slow flow rate, do you realy want it to take 2.5 hrs to get the room up to 1500ppm, your going to be way over filling that room with gas. That and changing that tank way more than you need to.

The deal with co2 is that youve got to get in the sweet spot for it to be worth the trouble, and with out a way to accurately dose the room every day its hard to tell where that sweet spot is.

 

[Diamonddss]

Diamond, I cant help you with those calculations but i can tell you that if you are pumping gas for 2.5 hrs at a crack you will likely freeze the valve open.

My room is a similar size and at lights on the gas runs on and off for about 2 to 3 minutes to get to 1500ppm. So unless your using a super slow flow rate, do you realy want it to take 2.5 hrs to get the room up to 1500ppm, your going to be way over filling that room with gas. That and changing that tank way more than you need to.

The deal with co2 is that youve got to get in the sweet spot for it to be worth the trouble, and with out a way to accurately dose the room every day its hard to tell where that sweet spot is.

thanks yeah im confused, ive also read 5 off 1 on, i need ppm meter but it will have to wait a few months. I have not started running it on a timer but i want too untill i get the meter.

 

[sexybudandnugs]

that's what the directions say.. i think I got the same regulator and sentinel... I just started using though... but basically let me do the math for you.... I set my room for .2 (on sentinel) and 2.5 hours on when the lights come on... then 15 on ... 15 off... until an hour before the lights shut... I don't have a co2 ppm meter though.... just going on directions....I think when the lights are off plants don't use co2 but o2....

Never cracked or froze for me.. with 2.5 hours on....

6X6X7=252 cubic feet
252x.0012=.3 (assume you have 300 ppm from atm.)
.3/3=.1
.1/2= .05
.05 for your room
I think set at your lowest setting ... When I did the math I got like .1 for my room but left it at .2

 

[Diamonddss]

that's what the directions say.. i think I got the same regulator and sentinel... I just started using though... but basically let me do the math for you.... I set my room for .2 (on sentinel) and 2.5 hours on when the lights come on... then 15 on ... 15 off... until an hour before the lights shut... I don't have a co2 ppm meter though.... just going on directions....I think when the lights are off plants don't use co2 but o2....

Never cracked or froze for me.. with 2.5 hours on....

6X6X7=252 cubic feet
252x.0012=.3 (assume you have 300 ppm from atm.)
.3/3=.1
.1/2= .05
.05 for your room
I think set at your lowest setting ... When I did the math I got like .1 for my room but left it at .2

thanks much for your help on this