Winter Weedy Wonderland - Auto Grow - Royal Queen Seeds

[Waywardwayne]

To calibrate you just put distilled water on the glass and look through, adjust the screw so the line is exactly at zero.

Wipe it off and use clean water on the cloth to clean the lens every time.

 

[Lady Cannafan]

Hey guys, the unit says it's been pre-calibrated. Do you trust that?
I have to wait for my distilled water now. I was entirely out.
It's hard to see that little scale in there, my poor eyes. LOL

 

[StoneOtter]

Go forth and conquer with the power of decomposition !!

That's a Jedi growers expression if ever I heard one! I love it!

Well, it's finally here.
I have added new equipment to my grow toys. ;-)
@Gee64 or anyone else, any tips or hints on using the refractometer? Cleaning etc.?

I have the AC Infinity VPD IR thermometer and the Aichos portable Optical Refractometer.
I'll put these to use later today. Apparently there is no heat in the zon delivery trucks, these two boxes were seriously cold. I used my IR kitchen thermometer on them when I brought them in, they were at 38 F. LOL

Oh boy! Nice refractometer! Mine has only one hinge mount where yours has two. Yours will lay flatter than mine and require less drops I'm thinking. I went pre owned on the bay. Win some lose some.

 

[StoneOtter]

Hey guys, the unit says it's been pre-calibrated. Do you trust that?
I have to wait for my distilled water now. I was entirely out.
It's hard to see that little scale in there, my poor eyes. LOL

No, but I wouldn't let that get in the way of play with it. Trust and verify later. Just don't make moves based on its results yet.

 

[Lady Cannafan]

No, but I wouldn't let that get in the way of play with it. Trust and verify later. Just don't make moves based on its results yet.

Yeah, I gotcha.
My initial VPD is coming out to around 1.4-ish. We're about halfway into the day with all the fans and light on.
Hope I am doing this right....I could be mucking it up. I did several different areas of the canopy, and figuring the plants in flower stage.
I will do another about an hour before lights out and see what changes.

I did need to raise my light though, the two that aren't flowering yet look like they are not liking it so close.

 

[StoneOtter]

Yeah, I gotcha.
My initial VPD is coming out to around 1.4-ish. We're about halfway into the day with all the fans and light on.
Hope I am doing this right....I could be mucking it up. I did several different areas of the canopy, and figuring the plants in flower stage.
I will do another about an hour before lights out and see what changes.

I did need to raise my light though, the two that aren't flowering yet look like they are not liking it so close.

What are you using for a chart for ideal VPD for stages of growth? Is 1.4 in the zone you're looking for? Seems it.

 

[Lady Cannafan]

What are you using for a chart for ideal VPD for stages of growth? Is 1.4 in the zone you're looking for? Seems it.

I googled it (optimal VPD for indoor cannabis plants) and came up within that range for flowering.

Anybody have an accurate chart I should folla, or what your optimal range is for indoor cannabis growing? I'm new to this.....

 

[Gee64]

Hey sweet! I see they got you covered on calibration. If you hold it under a bright light the gradient inside will appear much brighter, and the eye piece should rotate to dial focus in to match your eye.

As for the IR gun, if you zap something cold 1st, like a concrete floor, then zap a leaf that is supposed to give you a much more accurate reading.

I remotely take air temp and RH, then quickly unzio the tent and zap a few leaves. Atmosphere changes quickly once the door is opened and leaves react fast.

Try to zap the ones under the hotspots of your light as they will be the extreme ones. I also zap the perimeter colas to help with propping them under better light. Remember the 10 hour rule for adjustments. Same for brix readings, so at the 10 hour mark after lights on, you can do both effectively.

Do you have a controller that tells VPD or will you be using a VPD calculator?

If you have a controller you need to enter the differential between air and leaf temp, so lets pretend air is 78F and leaf is 75F, you would enter a value of 3 in the controller app's "leaf temp offset" section, and if you are using either an online VPD calculator or a VPD calculator app, you want one with 3 input variables. Air temp, leaf temp, and RH.

The 2 input ones are weather VPD calculators and use a different formula.

Both the calculators and the controllers that have 3 inputs can do both plant and atmosphere VPD's simply by entering the leaf temp as the same as air temp, or by setting leaf temp offset to zero. The programming automatically flips from one formula to the other, so they are dual purpose.

Plant VPD is your rate of transpiration, and air VPD, the 2 input one for weather, is a reflection of the atmosphere's ability to absorb moisture.

When leaf temps are equal to or warmer than atmosphere, the plant is transpiring moisture out faster than atmosphere can wick it away, and stomata start to choke so they close, and CO2 intake is restricted. Everything gets stressed at that point.

A 3 input formula automatically compensates in the air's ability to wick, but the 2 input one won't compensate for leaf transpiration.

If you are comparing things to a chart, make sure it's a plant VPD chart and not an air VPD chart.

 

[Lady Cannafan]

Hey sweet! I see they got you covered on calibration. If you hold it under a bright light the gradient inside will appear much brighter, and the eye piece should rotate to dial focus in to match your eye.

As for the IR gun, if you zap something cold 1st, like a concrete floor, then zap a leaf that is supposed to give you a much more accurate reading.

I remotely take air temp and RH, then quickly unzio the tent and zap a few leaves. Atmosphere changes quickly once the door is opened and leaves react fast.

Try to zap the ones under the hotspots of your light as they will be the extreme ones. I also zap the perimeter colas to help with propping them under better light. Remember the 10 hour rule for adjustments. Same for brix readings, so at the 10 hour mark after lights on, you can do both effectively.

Do you have a controller that tells VPD or will you be using a VPD calculator?

If you have a controller you need to enter the differential between air and leaf temp, so lets pretend air is 78F and leaf is 75F, you would enter a value of 3 in the controller app's "leaf temp offset" section, and if you are using either an online VPD calculator or a VPD calculator app, you want one with 3 input variables. Air temp, leaf temp, and RH.

The 2 input ones are weather VPD calculators and use a different formula.

Both the calculators and the controllers that have 3 inputs can do both plant and atmosphere VPD's simply by entering the leaf temp as the same as air temp, or by setting leaf temp offset to zero. The programming automatically flips from one formula to the other, so they are dual purpose.

Plant VPD is your rate of transpiration, and air VPD, the 2 input one for weather, is a reflection of the atmosphere's ability to absorb moisture.

When leaf temps are equal to or warmer than atmosphere, the plant is transpiring moisture out faster than atmosphere can wick it away, and stomata start to choke so they close, and CO2 intake is restricted. Everything gets stressed at that point.

A 3 input formula automatically compensates in the air's ability to wick, but the 2 input one won't compensate for leaf transpiration.

If you are comparing things to a chart, make sure it's a plant VPD chart and not an air VPD chart.

I'm going to read through this again in a bit, but first I need to upload a photo to ask a question on. Be back in a little while.

 

[Lady Cannafan]

Hey sweet! I see they got you covered on calibration. If you hold it under a bright light the gradient inside will appear much brighter, and the eye piece should rotate to dial focus in to match your eye.

As for the IR gun, if you zap something cold 1st, like a concrete floor, then zap a leaf that is supposed to give you a much more accurate reading.

I remotely take air temp and RH, then quickly unzio the tent and zap a few leaves. Atmosphere changes quickly once the door is opened and leaves react fast.

Try to zap the ones under the hotspots of your light as they will be the extreme ones. I also zap the perimeter colas to help with propping them under better light. Remember the 10 hour rule for adjustments. Same for brix readings, so at the 10 hour mark after lights on, you can do both effectively.

Do you have a controller that tells VPD or will you be using a VPD calculator?

If you have a controller you need to enter the differential between air and leaf temp, so lets pretend air is 78F and leaf is 75F, you would enter a value of 3 in the controller app's "leaf temp offset" section, and if you are using either an online VPD calculator or a VPD calculator app, you want one with 3 input variables. Air temp, leaf temp, and RH.

The 2 input ones are weather VPD calculators and use a different formula.

Both the calculators and the controllers that have 3 inputs can do both plant and atmosphere VPD's simply by entering the leaf temp as the same as air temp, or by setting leaf temp offset to zero. The programming automatically flips from one formula to the other, so they are dual purpose.

Plant VPD is your rate of transpiration, and air VPD, the 2 input one for weather, is a reflection of the atmosphere's ability to absorb moisture.

When leaf temps are equal to or warmer than atmosphere, the plant is transpiring moisture out faster than atmosphere can wick it away, and stomata start to choke so they close, and CO2 intake is restricted. Everything gets stressed at that point.

A 3 input formula automatically compensates in the air's ability to wick, but the 2 input one won't compensate for leaf transpiration.

If you are comparing things to a chart, make sure it's a plant VPD chart and not an air VPD chart.

Okay, here is my VPD manual pics. From what I'm understanding, this unit is doing my leaf VPD calculations for me, right? Don't laugh at me....laugh with me if I'm misunderstanding this.

 

[Gee64]

Okay, here is my VPD manual pics. From what I'm understanding, this unit is doing my leaf VPD calculations for me, right? Don't laugh at me....laugh with me if I'm misunderstanding this.

Maybe. Did you enter a leaf temp offset value? What is the make and model, I'll look at it's manual and then we can sort it out.

 

[Lady Cannafan]

I'm thinking I still need to calculate something, leaf temp offset?
I need to find an app for my phone I guess. I don't have a controller...yet. LOL

 

[Gee64]

I have 2 long posts, one on brix and one on VPD for you, but lets get the equiptment working correctly 1st, so the posts make more sense. Be patient with yourself, and no such thing as a stupid question here. Both brix and VPD seem overwhelming until you get it. Once you get it then it becomes very simple

 

[Lady Cannafan]

Maybe. Did you enter a leaf temp offset value? What is the make and model, I'll look at it's manual and then we can sort it out.

AC Infinity Model: AC-TVR3

This one

Amazon.com

 

[Lady Cannafan]

I have 2 long posts, one on brix and one on VPD for you, but lets get the equiptment working correctly 1st, so the posts make more sense. Be patient with yourself, and no such thing as a stupid question here. Both brix and VPD seem overwhelming until you get it. Once you get it then it becomes very simple

Yeah, I know it's going to take some figgerrrin. LOL
I'll be back later, need to get some vape meds in.
Thanks for your help everyone!

 

[Gee64]

I'm thinking I still need to calculate something, leaf temp offset?
I need to find an app for my phone I guess. I don't have a controller...yet. LOL

Yes you do.

Here is an online VPD calculator.

 

[Lady Cannafan]

Here is the page in the manual that explains all the readings:

 

[Melville Hobbes]

a leaf temp offset value?

I really don't know much about VPD, but looking at that readout it's measuring both the air temp and the leaf temp.
The offset is the difference between the two and would only be important if you're using a monitor that only measures air temp, right?

Edit: I should have looked at that post when it came up as I was typing

 

[Gee64]

AC Infinity Model: AC-TVR3

This one

Amazon.com

Is this an IR gun that also does VPD? if so you must hang it in your tent at leaf level to get both RH and air temps correct, then zap a leaf, unless of course you have it linked to an app that you can input all those values into.

 

[Lady Cannafan]

Is this an IR gun that also does VPD? if so you must hang it in your tent at leaf level to get both RH and air temps correct, then zap a leaf, unless of course you have it linked to an app that you can input all those values into.

Yes, that's what I thought it was when I ordered it.
The description says first of it's kind to measure 5 in 1 climate readings and calculates true Leaf VPD. I read that to mean I wouldn't have to do any manual calculations.
This chit is so foncusing.
I have it in the grow room, but if I need it near the plants I can do that too.