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Multi-Function Tester- Best To Buy
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<blockquote data-quote="NozSpark" data-source="post: 314715" data-attributes="member: 601"><p>OK then,,, here's my opinion......</p><p></p><p>Firstly you are not calibrating a meter when you use a check box,,, you are checking that the readings that you get are consistent.. Calibration (and i mean proper calibration) can only be carried out using test equipment that has itself been calibrated to traceable standards,, usually it should also be carried out in an temperature and humidity controlled atmosphere.</p><p></p><p>So, how do we ensure that our equipment is working...</p><p></p><p>If we have a calibrated meter and then test it using our check box and record the readings (as soon as we receive it) we will then have a base reading to compare all our future readings against.</p><p></p><p>We then check our meter at regular interval intervals and record the readings which we conmpare aginst all the previous readings that we have taken.</p><p></p><p>If any reading has significntly changed then we obviously have a problem with either the check box, test equipment, leads or batteries which we should further investigate</p><p></p><p>It is not important that the readings are accurate (a 1Kohms resistor could get a reading of 900ohms by the time you have taken component and meter accuracy into account)... the important thing is that the results are consistent.</p><p></p><p>Obviously this does not take away from the fact that meters do need calibrating from time to time</p><p></p><p>IMHO some of my above opinion also puts doubt in my mind as to the validity of "on site" calibration</p></blockquote><p></p>
[QUOTE="NozSpark, post: 314715, member: 601"] OK then,,, here's my opinion...... Firstly you are not calibrating a meter when you use a check box,,, you are checking that the readings that you get are consistent.. Calibration (and i mean proper calibration) can only be carried out using test equipment that has itself been calibrated to traceable standards,, usually it should also be carried out in an temperature and humidity controlled atmosphere. So, how do we ensure that our equipment is working... If we have a calibrated meter and then test it using our check box and record the readings (as soon as we receive it) we will then have a base reading to compare all our future readings against. We then check our meter at regular interval intervals and record the readings which we conmpare aginst all the previous readings that we have taken. If any reading has significntly changed then we obviously have a problem with either the check box, test equipment, leads or batteries which we should further investigate It is not important that the readings are accurate (a 1Kohms resistor could get a reading of 900ohms by the time you have taken component and meter accuracy into account)... the important thing is that the results are consistent. Obviously this does not take away from the fact that meters do need calibrating from time to time IMHO some of my above opinion also puts doubt in my mind as to the validity of "on site" calibration [/QUOTE]
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