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a down and dirty anology is the SG of battery acid its based off of the specific gravity of water. A charged battery has a higher SG and a flat battery a lower one. in this case instead of comparing it to water you compare it to c02 and a higher number is bad a lower number is good.Quote:
Originally Posted by d2dave
sampling and weight/vol/temp/pressure checks.Quote:
Originally Posted by frantic
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customs impound an item and you pay to prove you complied with regs and standards-etc.
Very difficult to check,particularly if it is a mixture.Quote:
Originally Posted by frantic
There is one,maybe two at the most places in this country that would be able to check what the refrigerant type or mixture is.
Most 'pure' refrigerants are a mixture anyway.
Normally a paper trail. You have to be unlucky to have to get it tested, as it should have been tested before you purchased it from a reputable contact.
Customs held my car until I sent a declaration that the car was not fitted with air conditioning. I had no paper work to show that it had been degassed or upgraded to R134a.
Most refridgeration workshops have a gas Identifier. don't know how accurate they are as Ive only used these with known gasses or to test contamination or to test for hydrocarbon mixtures.
From what i have seen,they are not worth having.Quote:
Originally Posted by Davehoos
You are better off using a P/T chart;)
And they aren't much use when you have a cocktail.:(
The specialists are the only way.
The unit I have used at my last employer are at least 10-15 years old and the size of a laptop. it would allow you to print out report on an external print out.
I worked for a reclaim gas salvage business. salvage auction vehicles have loads of different type gas used.
I have seen gas detectors that indicate types of gas, about as accurate as pressure versus temperature charts.
I've only ever used a PT chart.