hello,
i have a multifunction tester for testing domestic electrical installations.
i also have a checkbox that can be used to check the accuracy of the tester.
both are out of calibration by a good few years.
i dont want to have to spend a lot of money on calibrating both machines.
could you help me understand the percentage bits.
the continuity tester has an accuracy of +/- 1.5%rdg +3dgt, it is autoranging from 20/200/2000 ohms.
the checkbox for this function has three values to measure against, the recorded values in the box are 0.497, 0.996 and 2.002 ohms
i am not sure if i have to get 1.5% of the measured values of the checkbox and compare those to the readings of the tester?
so if i am right, the least i could measure is 0.489 ohms. this is -1.5% of 0.497. my tester gave me 0.45 ohms
is this method correct? the percentage values are the same for insulation resistance as well, when i test using the insulation resistance tester i get values that are with accuracy. could there be something wrong with the continuity tester?
i have not yet tested the rcd or earth loop tester
any help would be great,
all the best
simon
i have a multifunction tester for testing domestic electrical installations.
i also have a checkbox that can be used to check the accuracy of the tester.
both are out of calibration by a good few years.
i dont want to have to spend a lot of money on calibrating both machines.
could you help me understand the percentage bits.
the continuity tester has an accuracy of +/- 1.5%rdg +3dgt, it is autoranging from 20/200/2000 ohms.
the checkbox for this function has three values to measure against, the recorded values in the box are 0.497, 0.996 and 2.002 ohms
i am not sure if i have to get 1.5% of the measured values of the checkbox and compare those to the readings of the tester?
so if i am right, the least i could measure is 0.489 ohms. this is -1.5% of 0.497. my tester gave me 0.45 ohms
is this method correct? the percentage values are the same for insulation resistance as well, when i test using the insulation resistance tester i get values that are with accuracy. could there be something wrong with the continuity tester?
i have not yet tested the rcd or earth loop tester
any help would be great,
all the best
simon