Test and Measurement Archives

Made 2 Measure: Making Voltage Measurements

|Date: 12 December, 2018

Made 2 Measure: Making Voltage Measurements

You ask: Occasionally I need to make voltage measurements at points in the supply system before the main ...

You ask: Occasionally I need to make voltage measurements at points in the supply system before the main switch. I know this is hazardous so what can I do about it? For more Made 2 Measure advi ...

12 December, 2018
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Made 2 Measure: R2 Leads

|Date: 27 November, 2018

Made 2 Measure: R2 Leads

You ask: One of my colleagues has been using an R2 lead for years, and he says he finds it very useful. I ...

You ask: One of my colleagues has been using an R2 lead for years, and he says he finds it very useful. I’m not really sure what these leads are used for and whether I should invest in one. Can you he ...

27 November, 2018
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Made 2 Measure: Loop Testing of RCBO/RCD Circuits

|Date: 10 October, 2018

Made 2 Measure: Loop Testing of RCBO/RCD Circuits

The technical team at Megger answer this month’s reader query. YOU ASKED: I’ve been working in a college ...

The technical team at Megger answer this month’s reader query. YOU ASKED: I’ve been working in a college recently where supplies to the lab benches are protected by RCBOs with a 10ma earth leakage tri ...

10 October, 2018
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Loop Impedance Testing: Have We Seen The End of Uplift?

|Date: 25 July, 2018

Loop Impedance Testing: Have We Seen The End of Uplift?

An uplifting experience is generally considered to be something positive, but not when it comes to loop i ...

An uplifting experience is generally considered to be something positive, but not when it comes to loop impedance testing. But what exactly is uplift, why is it a problem, and what can be done about i ...

25 July, 2018
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Made 2 Measure: Varying Earth Loop Impedance Test Results

|Date: 23 July, 2018

Made 2 Measure: Varying Earth Loop Impedance Test Results

You ask: I’ve noticed that if I repeat an earth loop impedance test several times on the same circuit, th ...

You ask: I’ve noticed that if I repeat an earth loop impedance test several times on the same circuit, the results sometimes vary a lot. Why is this and how do I decide which of the results to record ...

23 July, 2018
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Made 2 Measure: Why Do You Have High Zs Readings?

|Date: 5 July, 2018

Made 2 Measure: Why Do You Have High Zs Readings?

The experts at Megger answer your latest testing query. YOU ASKED: When I was carrying loop impedance tes ...

The experts at Megger answer your latest testing query. YOU ASKED: When I was carrying loop impedance tests on a recent job, I got high Zs readings on RCD protected circuits, even though the ZE and R1 ...

5 July, 2018
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18th Edition: Do You Need New Test Equipment?

|Date: 29 June, 2018

18th Edition: Do You Need New Test Equipment?

Now the 18th Edition Regs have arrived, do you need to upgrade your existing 17th Edition compliant test ...

Now the 18th Edition Regs have arrived, do you need to upgrade your existing 17th Edition compliant test instruments at the same time? David Sweetman, Marketing & Business Development Director at ...

29 June, 2018
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How to Determine Earth Fault Loop Impedance

|Date: 24 March, 2018

How to Determine Earth Fault Loop Impedance

More expert advice from the team at ELECSA. This article explains why it is necessary to determine the v ...

More expert advice from the team at ELECSA. This article explains why it is necessary to determine the values of earth fault loop impedance (Zs) for new installations and for those in service that ar ...

24 March, 2018
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Made 2 Measure: Nuisance Tripping

|Date: 13 March, 2018

Made 2 Measure: Nuisance Tripping

You asked: I’ve been having a lot of trouble recently with nuisance tripping of RCDs and RCBOs. It’s ofte ...

You asked: I’ve been having a lot of trouble recently with nuisance tripping of RCDs and RCBOs. It’s often difficult to trace the source of the problem, especially when it’s intermittent. Do you have ...

13 March, 2018
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Product Test: Bosch GTC 400 C Thermal Imaging Camera

|Date: 21 February, 2018

Product Test: Bosch GTC 400 C Thermal Imaging Camera

In this product test Jeff Jones reviews the GTC 400 C thermal imaging camera from Bosch. As an electrical ...

In this product test Jeff Jones reviews the GTC 400 C thermal imaging camera from Bosch. As an electrical contractor working in the events industry I can really understand the value of having thermal ...

21 February, 2018
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