What is the estimated lifetime of the instrument? Answers based on company response suggest no need to calibrate 'for the lifetime of the instrument'.
1959554
From the product description (probably updated since this question was asked): "The Corentium monitor is guaranteed for one year and in normal home use, it requires no annual calibrations throughout its useful life, estimated at over 10 years."
1959555
Since it has no moving parts, I would guess that it's design lifespan is many years. However, if you're buying an instrument for it's guaranteed accuracy, this may not be the instrument for you. I'm a (retired) test and measurement aerospace engineer and I'm very pleased with the capability this instrument gives me. I'm comfortable with the fact that I'll never send this out for calibration. I have several instruments around the house: multimeter, oscilloscope, frequency counter, etc, that have never seen the insides of a standards laboratory, and yet they still provide valuable measurements for me. The whole purpose of this instrument, in my case, is to monitor radon levels in my house. It has proven accurate enough, via comparison measurements with other calibrated instruments, that it serves my purpose well. However, without that certified and valid calibration sticker, your measurements cannot be used for any official purposes. Short of an official end-of-life analysis from the manufacturer, this'll have to do.
1959556
I could only image it's the life of the solid state hardware so long as you change the batteries. I've had mine a long time without yet having to even change the batteries.
310625
Sean, I have purchased many BAC testers over the years and have yet to find one that does not require calibration. Because they have a sensor built into them, over time or heavy use, the sensor will need to be recalibrated. The Breathometer says calibration is recommended after 250 uses which is in line with others in the market (typical range from other products is usually 100-300 uses). A nice feature here is that there is a test count in the app allowing you to keep track.
662308
I'll have to modify my answer. I have a ten test kit but, again, the shelf life was well over 12 months.
1068210
Yes. Thats what I wanted to know. I just needed someone to tell me how many years I might expected to be using this thing and you gave me a good estimate. Thanks.
825224
All you need is included: the instrument, case and calibration solutions. Not sure of the sensor life. Still working well for us. Eventually the solutions have to be replaced as they become depleted.
2267321
Hi Brent, I've just opened one of them up, and the answer is no. There is no off set or gain potentiometer that would allow a calibration. I have been using temperature devices for years, and I have to have them calibrated annually. I have never had a 0.5C thermocouple be out out of spec--only an RTD one that goes to hundredths of a degree. They typically do not go bad or drift (unless damaged). Regards, Daryl
1940814
It seems to calibrate itself upon startup. It will calibrate itself to zero if you turn it on with a container that you intend to fill already on it. As for it's need to be calibrated for accuracy, we'll we just have to trust to the gods of electronics. That said, I've never felt it might be even slightly beyond negligible where error is concerned. I'll buy another if mine ever poops out!
32513
I have only used the instrument a couple of time -- months ago. I do remember checking my cell phone and got a low reading. Don't know how accurate, or what reading would be normal.
723913
Don't know, and don't care. This was one of the worst purchases I've ever made. I bought it several months ago, and in a few days, the Low setting would stop working. So I left a message asking to replace , and didn't hear anything back from them. If you've used for 6 months, I'd say you had it running longer than expected, and it's time to find another one, probably not from them.
1854036
There is no initial calibration needed and I don't find anything regarding instructions on how to calibrate it should there be the need to in the future. I am assuming that since it works as most digital scales do, measuring changes in electrical resistance distributed to load cells, calibration is performed at the factory and would need to be performed by the factory in the future if there was a need to do so. I have had other digital scales which operated the same way and lasted for many years. It measures the same as a mechanical scale I have so I believe it is accurate from the factory. The only way to tell for sure is to locate a standard and periodically check to ensure it is calibrated against that standard.
129266
We have this test meter for our community well. We fluorinate according to the EPA guidelines. It works well when it is calibrated. You have to have the 1% fluoride solution and the tabs to calibrate the meter. We had the meter for about 4 months and the sensor went bad. The company replaced it immediately at no cost but with the wrong part. It took several weeks to replace it with the right part. It was on B/O for some time. Now that we use it daily I can get an idea of the level we need to be at. It's a field test and they are not 100% but close enough for what we need. When our levels were low the meter just gave a Lo code. It am not confident it would give you a zero reading you may be looking for. We have this test meter for our community well. We fluorinate according to the EPA guidelines. It works well when it is calibrated. You have to have the 1% fluoride solution and the tabs to calibrate the meter. We had the meter for about 4 months and the sensor went bad. The company replaced it immediately at no cost but with the wrong part. It took several weeks to replace it with the right part. It was on B/O for some time. Now that we use it daily I can get an idea of the level we need to be at. It's a field test and they are not 100% but close enough for what we need. When our levels... » Read More We have this test meter for our community well. We fluorinate according to the EPA guidelines. It works well when it is calibrated. You have to have the 1% fluoride solution and the tabs to calibrate the meter. We had the meter for about 4 months and the sensor went bad. The company replaced it immediately at no cost but with the wrong part. It took several weeks to replace it with the right part. It was on B/O for some time. Now that we use it daily I can get an idea of the level we need to be at. It's a field test and they are not 100% but close enough for what we need. When our levels were low the meter just gave a Lo code. It am not confident it would give you a zero reading you may be looking for. « Show Less
877973
I don't believe the machine can be calibrated, at least I haven't noticed an option. Also the readings are not always consistent if you take a few back to back. Have others noticed this?
1488822
As near as I know it comes pre-calibrated and will stay that way until it is dropped or damaged. If it does ever need service, the company who makes it is very easy to get along with and will treat you right. When it arrives, turn it on and you are ready to go.
1670622
No calibration required. It counts reflected light pulses. I've had one for some time with no issues and I use mine on a daily basis. I'm a marine diesel technician, I put reflective tape onthe vibration dampner reads every time. I had compared it to more expensive photo TACHS from snap-on and Mac and this one is dead on every time.
2149954
The product does not come with a certificate & it's a hassle to obtain. The Extech website notes the following: Is my meter calibrated out of the box? How often should it be calibrated? Does it come with a calibration certificate? How & where can I get my meter calibrated? All Extech products are factory calibrated prior to shipment. This calibration is valid for one year. An annual factory calibration is recommended. Extech does not include calibration certificates with our products. NIST calibrations with data can be purchased for an additional charge for most products. To send your meter to be NIST calibrated please contact our return department for a return authorization number and other return information.
176239
My warranty says it lifetime on the neck and structure as long as it's not abused. I'm very happy with this guitar, but had it set up by a professional luthier.
2082263
Calibrate it with a 7.0 calibration solution. I also recommend storing it in their storage solution. Be sure to read the manual or you may make incorrect assumptions about certain things.