Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Calibration checksheet
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="milovisk" data-source="post: 162899"><p>Usually between 10 - 15% need some form of intervention but that is not the point it could be 1 in every 200 but it is still important to pick up that 1.</p><p></p><p>It is like asking how many 4 year old cars fail the MOT my guess would be less than 10% but you still need to have it done.</p><p></p><p>As I said above it is just not about accuracy, it is also about compliance</p><p></p><p>Using your checkbox can you tell the following</p><p></p><p>1. Your meter can output 200mA on continuity down to short circuit?</p><p></p><p>2. Your meter can drive 1mA into 0.25M at 250V, 0.5M at 500V and 1M at 1000V</p><p></p><p>3. Output current for each RCD range?</p><p></p><p>4. Linearity throughout all ranges</p><p></p><p>Just a sample of the tests done at calibration not done on your checkbox, some expensive checkbox do check what I have mentioned in point 2 but most people are not using these.</p><p></p><p>Your tetser could give out 50V for 500V but still measure accurately something that I have seen on quite a number of times but using your checkbox this would pass on an ongoing basis.</p><p></p><p>Would you then consider it right that you are checking installations at 50V instead of 500V</p><p></p><p>Just looking at accuracy is the gae old trap that NICEIC inspectors fall into because they do not understand instrumentation just like we metrologists do not understand all of the ins and outs of electrical installations</p></blockquote><p></p>
[QUOTE="milovisk, post: 162899"] Usually between 10 - 15% need some form of intervention but that is not the point it could be 1 in every 200 but it is still important to pick up that 1. It is like asking how many 4 year old cars fail the MOT my guess would be less than 10% but you still need to have it done. As I said above it is just not about accuracy, it is also about compliance Using your checkbox can you tell the following 1. Your meter can output 200mA on continuity down to short circuit? 2. Your meter can drive 1mA into 0.25M at 250V, 0.5M at 500V and 1M at 1000V 3. Output current for each RCD range? 4. Linearity throughout all ranges Just a sample of the tests done at calibration not done on your checkbox, some expensive checkbox do check what I have mentioned in point 2 but most people are not using these. Your tetser could give out 50V for 500V but still measure accurately something that I have seen on quite a number of times but using your checkbox this would pass on an ongoing basis. Would you then consider it right that you are checking installations at 50V instead of 500V Just looking at accuracy is the gae old trap that NICEIC inspectors fall into because they do not understand instrumentation just like we metrologists do not understand all of the ins and outs of electrical installations [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Calibration checksheet
Top