How do you calibrate this?
765823
Just to add a bit more. I wear it to wake me up at night if my O2 drops to low. You can set what % the alarm goes off at. I spent 3 days last spring in a coma when my O2 crashed in my sleep, this meter wakes me or my wife up before that happens again. Pin point accuracy isn't important for me as long as it saves my life, which so far, so good.
765824
There are adjustments on the reports that you can change the event range, etc. Or Percent Drop for Event, Min Event, Desaturation, ... Pulse Range change per event, Min Even. also on the alarms there is min max for both o2 and pulse. I have not figured out how to set the calibrations for the o2. I seems to be down 2% compared to stand alone device.
765825
You can't. I've had three (returned 2 due to this issue) and I ended up manually taking into account SpO2 readings are 1-4% low after talking to an otherwise very helpful tech rep. Manual says +/-2%, but all 3 were off 50% of the time with more than 2% on the low side, but never the high side. Pulse readings on all three were OK, though. Btw, in spite this shortcoming, I do like the product as I can use its alarm feature to wake me up when my heart rate or O2 drops too low.
765826
As far as I know you don't. I have two other oxymeters and have taken overnight tests with professional grade recorders and my meter reads accurate out of the box when cross-referenced with the other meters. It is important, at least for me, to remember I can vary up to 5 points depending on what finger I use with any meter. Anyway, my meter came accurate and didn't need calibrating so I never looked in to it.
2257254
Sir, check in the manual if the machine has calibration features. Check for the cables and accessories as well..
1349896
Mine is not calibrated and is way off. They expect me to find a 5 lb. weight somewhere in order to calibrate the item.
1334372
I didn't look at instructions. It's a very simple device. You need to order some calibration fluid. Put the 35ppt calibration fluid on the viewing glass and close the plastic cover. The fluid should cover the glass. Adjust with adjusting screw. It's that simple to calibrate it.
826816
I do not recall anything about calibration and I no longer have it. After spending two days with very unusual readings, I threw it in the trash. I purchased a used military compass which still works after 30 years.
53788
According to directions it is well calibrated before shipment and recommends recalibration cycle of one year. Directions tell you how to recalibrate. Seems to be working for me/
901297
You do have to calibrate it and it's not easy to do. Mine finally calibrated and then broke after it fell due to the poor monting .
482640
No, There is no way to calabrate it. Inorder to do so you would need a series of know control set temperetures and away to adjust the thermometer. I am sure this is done at the factory. hope this answered your question.
501126
They only give you enough for a one time calibration. You will need to buy the appropriate storage solution. A little goes a long way.
1777384
I have never calibrated mine and not sure how you would do it short of sending it back to factory. I have compared mine with several other test sets and also the system at my pool store and found it to be very accurate.
346322
To calibrate, use distilled water. You set the device to zero and thats all. You should do this once every three / four months.
1322894
Not sure but it is easy to check when you receive it. We like this thermometer very much. It is easy to use and a great value. We checked it after receipt and it was correct so we did not have to alter the calibration. It comes with instructions.
1392307
I found no calibration feature. You can contact the manufacturer and they will answer your question further.
808572
Calibration is easily done by simply rotating a small screw inside the battery compartment. Unlike higher priced sound level meters, this Wensn SLM's calibration screw is very sensitive; small rotation angles cause large changes to the calibration, so be careful and double-check your adjustment. Obviously you will need either a precision calibrator or, less reliably, an already calibrated SLM to compare sound levels to. I've checked two new Wensn SLMs when first purchased and they both were within the advertised calibration range, at least for the 1000 Hz frequency that most calibrators generate. These are less accurate though and not linear enough at the extremes of their advertised frequency range.
343090
I don't think you can calibrate it. I haven't seen anything on the device or the app that lets you do it. Myself and 3 other people I know use it on a regular basis and have never had this issue. You might have a defective unit.
598125
Guy has the best answer so far. Use a solution that is closest to the range you expect to be measuring on a daily or regular basis.The factory has calibrated it a 442 ppm.John
860949
It does not require calibration, but it sometimes under-weighs by .1 ounce. I bought a set of 1 oz and 2 oz weights and test it occasionally, especially when I get a reading that is exactly 1, 2, or 3 ounces.