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Search: Posts Made By: ajdelange
Forum: Brew Science Today, 07:18 PM
Replies: 23
Views: 391
Posted By ajdelange
There are ion exchange filters for inline use but...

There are ion exchange filters for inline use but these are usually not used except at the output of an RO system. Ion exchange is a pretty expensive way to go if they have to do a lot of work so...
Forum: Brew Science Today, 06:53 PM
Replies: 23
Views: 391
Posted By ajdelange
Yes, it does. It contains cation and anion...

Yes, it does. It contains cation and anion exchange resins. Anything in the water that isn't H20, H+ or OH- is replaced by H+ (if its a cation) and OH- (if its an anion). As there are equal numbers...
Forum: Brew Science Yesterday, 10:01 PM
Replies: 3
Views: 72
Posted By ajdelange
I guess you could collect some and drop a little...

I guess you could collect some and drop a little hydrochloric acid on it. If it doesn't fizz then it all probably phosphate. If it does fizz then there is some calcium carbonate in there but it...
Forum: Brew Science Yesterday, 05:54 PM
Replies: 7
Views: 224
Posted By ajdelange
I've got a similar one made by Hach and it is...

I've got a similar one made by Hach and it is definitely way cool. Send me you e-mail addresses and next time I use it I'll e-mail you a reading. Actually, the electrode seems pretty good for general...
Forum: Brew Science Yesterday, 04:25 PM
Replies: 7
Views: 224
Posted By ajdelange
There was a time when that might have been true...

There was a time when that might have been true but it no longer is. There have been some revolutionary improvements in electrode technology in a relatively short time and one of them is in...
Forum: Brew Science Yesterday, 01:14 PM
Replies: 10
Views: 244
Posted By ajdelange
Where will you get the sulfuric acid? In the UK...

Where will you get the sulfuric acid? In the UK there are a couple of suppliers of an equinormal blend of food grade sulfuric and hydrochloric acids intended exactly for this purpose. But, alas,...
Forum: Brew Science Yesterday, 01:11 PM
Replies: 23
Views: 391
Posted By ajdelange
The chloride ion will, to most peoples' way of...

The chloride ion will, to most peoples' way of thinking, improve your beer - in fact you could use more. The free chlorine, quite conversely, can react with husk phenols (or phenols from any other...
Forum: Brew Science Yesterday, 01:05 PM
Replies: 9
Views: 127
Posted By ajdelange
Calculators and spreadsheets are relatively...

Calculators and spreadsheets are relatively precise in their pH estimates in comparison to their SRM estimates. Many people have ideas as to what a beer of SRM 31 should look like and calculators are...
Forum: Brew Science Yesterday, 12:51 PM
Replies: 23
Views: 391
Posted By ajdelange
No but the minerals in the water accentuate beer...

No but the minerals in the water accentuate beer flavors.
Forum: Brew Science 04-16-2014, 11:14 AM
Replies: 23
Views: 391
Posted By ajdelange
New hoses are the worst in this regard as none of...

New hoses are the worst in this regard as none of the plasticizer that will eventually leach out has had the opportunity to do so. As to the taste: let the hose sit overnight with water in it, draw a...
Forum: Brew Science 04-16-2014, 03:38 AM
Replies: 23
Views: 391
Posted By ajdelange
Yes, that is something you need to think about....

Yes, that is something you need to think about. Garden hoses are not intended for use with potable water and contain plasticizers that can leach out especially right after the hose has lain in the...
Forum: Automated Brewing Forum 04-15-2014, 08:01 PM
Replies: 10
Views: 210
Posted By ajdelange
It doesn't appear your unit is reconfigurable...

It doesn't appear your unit is reconfigurable with respect to type of input and RTD parameters so the RTD you use must match the one you took out. One thing I notice with the manual is that the RTD ...
Forum: Brew Science 04-15-2014, 05:33 PM
Replies: 7
Views: 198
Posted By ajdelange
That fact in itself says you don't need to do it.

That fact in itself says you don't need to do it.
Forum: Brew Science 04-15-2014, 05:29 PM
Replies: 8
Views: 198
Posted By ajdelange
It seems to take very little time for enough CO2...

It seems to take very little time for enough CO2 to dissolve to show a pH change.



It's not worth doing the calculations as the amount dissolved is very little. Water has 0 buffering capacity...
Forum: Brew Science 04-15-2014, 04:18 PM
Replies: 8
Views: 198
Posted By ajdelange
It will have dissolved gasses. That's why DI...

It will have dissolved gasses. That's why DI water usually exhibits pH in the 5's or 6's (as opposed to pure water which is at pH 7 at 25 C).
Forum: Brew Science 04-15-2014, 04:14 PM
Replies: 4
Views: 161
Posted By ajdelange
People seldom ask this anymore as there are...

People seldom ask this anymore as there are probably a dozen spreadsheets and calculators available to answer this question and people have also tended to drop the notion that they must adhere to a...
Forum: Brew Science 04-14-2014, 11:59 AM
Replies: 4
Views: 161
Posted By ajdelange
Depending, of course, on your grist, the advice...

Depending, of course, on your grist, the advice to add alkalinity is probably not sound. Assuming 80% base malt with a DI pH of 5.6, 10% of something like a Vienna and 10% Caramel 60L your mash pH,...
Forum: Electric Brewing 04-12-2014, 10:20 PM
Replies: 24
Views: 403
Posted By ajdelange
voltage drop in SSR

None of that makes sense. If you try to control a DC load with an SSR it will never commutate and keep conducting even if you remove the gate signal. The gate signal should have no effect on the...
Forum: Brew Science 04-12-2014, 07:59 PM
Replies: 3
Views: 123
Posted By ajdelange
There are two approaches to variable water. One...

There are two approaches to variable water. One is to measure it before each brew and adjust accordingly and the other is to remove the variability by removing the minerals i.e. by using RO water...
Forum: Brew Science 04-12-2014, 03:26 PM
Replies: 2
Views: 78
Posted By ajdelange
No, calcium sulfate isn't that soluble but you...

No, calcium sulfate isn't that soluble but you would never add enough to exceed the solubility limit which is about a tsp and a half per gallon. Two tsp per 5 gal. is considered a lot. Your...
Forum: Electric Brewing 04-12-2014, 03:33 AM
Replies: 24
Views: 403
Posted By ajdelange
There is a 'holding current' i.e. a minimum...

There is a 'holding current' i.e. a minimum required to keep the device conducting but as the gate is being applied continuously that shouldn't be an issue.
Forum: Brew Science 04-11-2014, 11:41 PM
Replies: 29
Views: 2,200
Posted By ajdelange
This won't work because there is no mapping...

This won't work because there is no mapping between SRM and RGB. That mapping also depends on path, illuminant and observer. Thus there is no chart you can scan.




This you can do but you must...
Forum: Brew Science 04-11-2014, 07:59 PM
Replies: 23
Views: 391
Posted By ajdelange
It's in the Brew Science stickies. Yes,...

It's in the Brew Science stickies.

Yes, sauermalz, lactic or another acid are required for light beers with low alkalinity water like yours.
Forum: Electric Brewing 04-11-2014, 07:57 PM
Replies: 24
Views: 403
Posted By ajdelange
It isn't really. An SSR is a switch, not an...

It isn't really. An SSR is a switch, not an amplifier. It is designed to be either full on or full off. If its impedance depends on the level of the gate signal it isn't functioning properly.
Forum: Electric Brewing 04-11-2014, 07:04 PM
Replies: 24
Views: 403
Posted By ajdelange
SSR's do leak and they do, when turned on, have...

SSR's do leak and they do, when turned on, have voltage drops across them but not as much as (117 - 23). A couple of volts measured between the load side terminals with the the thing under load is...
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