I have got myself two meters, an accu-chek Performa, and it's smaller Nano version. We had a series of hot days in a row here (exceeding 35 Celcius) so I kept my strips and meters in the top drawer of the fridges door.
Yesterday, I did a fasting glucose test and got 5.2 mmol/L on one, and 5.8 mmol/L on the other. A variation of 0.6 mmol/L between two brand new meters.
Today when I did a fasting test, the readings were closer together 5.9 & 5.7.
In both days measurements were taken from the same lancet prick, and within a few seconds apart.
I still have the boxes that both meters came in, and despite each having substantial literature in multiple languages, none of the documentation actually has specifications and operating conditions.
I had to go online to find those and found the pertinent information to be "System Operating Conditions: 6°C to 44°C", which suggests that the fridge internal temps are probably not the best to operate it at, but I used them outside the fridge. Not inside it So that shouldn't have made that much of a difference.
Where I do suspect issues is that each meter probably took a different amount of time to warm up to ambient temperature [as one meter is about twice the size of the other], and I didn't give either meter sufficient time to warm up, the first day before taking measurements.
I do know that glucose measurement does take into account ambient temperature, but it probably assumes the meter is also at ambient temperature.
Any ideas, experiences?
And do you think I should get both meters calibrated? I mean first day readings were 0.6 mmol/L apart, but following measurements were closer together. Then again they could both be off.
Yesterday, I did a fasting glucose test and got 5.2 mmol/L on one, and 5.8 mmol/L on the other. A variation of 0.6 mmol/L between two brand new meters.
Today when I did a fasting test, the readings were closer together 5.9 & 5.7.
In both days measurements were taken from the same lancet prick, and within a few seconds apart.
I still have the boxes that both meters came in, and despite each having substantial literature in multiple languages, none of the documentation actually has specifications and operating conditions.
I had to go online to find those and found the pertinent information to be "System Operating Conditions: 6°C to 44°C", which suggests that the fridge internal temps are probably not the best to operate it at, but I used them outside the fridge. Not inside it So that shouldn't have made that much of a difference.
Where I do suspect issues is that each meter probably took a different amount of time to warm up to ambient temperature [as one meter is about twice the size of the other], and I didn't give either meter sufficient time to warm up, the first day before taking measurements.
I do know that glucose measurement does take into account ambient temperature, but it probably assumes the meter is also at ambient temperature.
Any ideas, experiences?
And do you think I should get both meters calibrated? I mean first day readings were 0.6 mmol/L apart, but following measurements were closer together. Then again they could both be off.