Help understanding PPM calibration results

NeWcS

NeWcS

Well-Known Member
I also sent his question to Bluelab but haven't heard back yet. Wanted to get your guys input;

""Hi - I was doing some testing of my BL(trunc) vs a cheapo meter I got on Amazon. All my readings from the BL are all with in the results i'd expect. However, when I used a calibration solution, I am not sure how to make sense of the results. They don't seem to match up. It seems the cheap meter matches up better. So It got me thinking so I wanted to ask you guys if my meter is outta whack? Any help would be great. Here are the results; ""

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The seller of the cheap brand has stated many times the PPM scale is 5 conversion.
Thanks
 
NeWcS said:
I also sent his question to Bluelab but haven't heard back yet. Wanted to get your guys input;

""Hi - I was doing some testing of my BL(trunc) vs a cheapo meter I got on Amazon. All my readings from the BL are all with in the results i'd expect. However, when I used a calibration solution, I am not sure how to make sense of the results. They don't seem to match up. It seems the cheap meter matches up better. So It got me thinking so I wanted to ask you guys if my meter is outta whack? Any help would be great. Here are the results; ""

vbXTix8.png


The seller of the cheap brand has stated many times the PPM scale is 5 conversion.
Thanks
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I wouldn’t trust the cheap manufactures statement. Who’s ref solution were you using?
 
Flowki said:
Can't you work out the actual ppm you are putting in so you don't need a ppm meter?. It's a one time thing unless you change lines.
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Hahaha, Right? I don't even use them except to double check as my schedule is dialed in. You're completely right! Good call out..

However, There are times I use boost or other unfamiliar products that I do rely on my pen for. I just need the piece of mind in knowing my gear is on point. Esp. at the price of Bluelabs equipment.
 
NeWcS said:
Hahaha, Right? I don't even use them except to double check as my schedule is dialed in. You're completely right! Good call out..

However, There are times I use boost or other unfamiliar products that I do rely on my pen for. I just need the piece of mind in knowing my gear is on point. Esp. at the price of Bluelabs equipment.
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I only use blue labs solution to check their stuff. My truncheon has been solid for a few years with no issue. I’ve dropped it kicked it and it still reads perfect.
 
When I buy calibration solution it has the ppm's on the label. I test it and see how close my meter is; seems simple. I don't understand why the GH solution has 3 different ppm values. That's why ppm's and math is so confusing for stoners.
 
70's natureboy said:
When I buy calibration solution it has the ppm's on the label. I test it and see how close my meter is; seems simple. I don't understand why the GH solution has 3 different ppm values. That's why ppm's and math is so confusing for stoners.
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You’ve never had to deal with VA math lol.
 
It was my understanding that uS (microSiemens) was the same as EC. 2930. 2.930ec.
I also thought 1500ppM (NaCI) was ppm @ .5.

So, you can see where the BL isn't jiving with those numbers. While the cheapo does.
 
I always figured 1500 ppm is 1500 ppm. If my meter is .5 scale then it will read 750. My new Hanna meter seems to read actual ppm's. I can't read the chinese instructions but it is what it is. I put in 1300 calibration solution and it reads 1300.
 
NeWcS said:
So, you can see where the BL isn't jiving with those numbers. While the cheapo does.
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I’ve got the monitor. If it’s a little dirty it can read off a lot in my experience. I just use the little cleaning kit they sell once a week.

It’s not my only meter, it’s in the res all the time and checks true against my other meter when it’s clean.

I think your BL is off.
 
I'm so confused. I am going to order a different reference solution so I can make better sense of this.
 
I think my issue might be the temperature of the solution. I just noticed that the bottle says @25c. Well my solution is at 19c. hmmm

**edit** naw. I converted it to compensate for the temp and its still way off. Next time I go to town i'll stop by the hydro shop.
 
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NeWcS said:
I think my issue might be the temperature of the solution. I just noticed that the bottle says @25c. Well my solution is at 19c. hmmm

**edit** naw. I converted it to compensate for the temp and its still way off. Next time I go to town i'll stop by the hydro shop.
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On the back of bl’s bottles they have what it should be for a bunch of different temps. If your truncheon is off it’ll be one of very few I’ve heard of.
 
Well I ordered BL solution and it seems the meter is waaaaay off. Just gonna trash it and buy another brand. Fuck BL!!! If you can't reply to a customers email in a few days, you're not the kinda company that deserves my money.

Thanks for everyone's input and opinions.
 
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