Hi,
Maybe a lack of search skills, but I cannot find any indication or referral in the standards like the 60601-1 we have right now (we cannot afford to buy them all) on how to interpret the significance of the last digit of values.
My late science teacher hammered on the notion that the significance of the last digit relates to the precision of measurement. A figure of 10.0 could mean a value between 9.95 and 10.05.
If a maximum allowed patient current of 50uA in SFC for CF is defined, does that mean that a measured 50.5uA still complies? This can be important to know because then for instance a 100k 1% tolerance resistor would be allowed to limit a 5V (ehh, 5.00000) voltage. For sake of argument this is disregarding all implications of measurement accuracy/precision, definition of resistor tolerance and all MOPP implications.
Does a collateral standard exist that addresses the interpretation of numbers? Or is it implicitly set in the way the tests must be performed, like requirements on the accuracy of the test setup?
Opinions are plenty available, but can anyone point me to the right standard(s) that have this in black and white?
Kind regards,
Loek
Maybe a lack of search skills, but I cannot find any indication or referral in the standards like the 60601-1 we have right now (we cannot afford to buy them all) on how to interpret the significance of the last digit of values.
My late science teacher hammered on the notion that the significance of the last digit relates to the precision of measurement. A figure of 10.0 could mean a value between 9.95 and 10.05.
If a maximum allowed patient current of 50uA in SFC for CF is defined, does that mean that a measured 50.5uA still complies? This can be important to know because then for instance a 100k 1% tolerance resistor would be allowed to limit a 5V (ehh, 5.00000) voltage. For sake of argument this is disregarding all implications of measurement accuracy/precision, definition of resistor tolerance and all MOPP implications.
Does a collateral standard exist that addresses the interpretation of numbers? Or is it implicitly set in the way the tests must be performed, like requirements on the accuracy of the test setup?
Opinions are plenty available, but can anyone point me to the right standard(s) that have this in black and white?
Kind regards,
Loek