Timeline for How to connect PE lead of oscilloscope?
Current License: CC BY-SA 4.0
9 events
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| Dec 21, 2023 at 16:58 | comment | added | Chester Gillon |
@Hearth ESD Wrist Strap Testing – What Does High Fail Vs. Low Fail Mean? contains Most wrist strap testers also test for low resistance (typical low fail is less than 750K ohms) , to assure that the 1 megohm resistor is present and performing as intended. ... The 1 megohm resistor is designed to limit the current to 250 microamps at 250 Volts rms AC, which is below the perception level of humans. . I.e. looks like the 1Mohm safety resistor is expected in the strap.
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| Dec 21, 2023 at 16:50 | comment | added | Justme | @Hearth All wrist strap grounding systems I have seen and used (and googled for this answer) have had the 1 Mohm resistor in the mains plug or the terminal block where the straps connect to. The plugs or blocks have the "button stud" interface and they read that they include 1Mohm safety resistors and the strap does not. However, other systems with different interfaces may still exist, with directly grounded terminal blocks or plugs, with the 1Mohm resistors inside the strap plug. But because they allow bypassing the resistor if someone replaces the plug, I wonder if they are safe for use. | |
| Dec 21, 2023 at 16:39 | comment | added | Hearth | @Justme Don't ESD wrist straps typically have the resistor in the wristband, not in the grounding point? | |
| Dec 21, 2023 at 15:03 | comment | added | Chester Gillon |
While the Desco 09838 product description doesn't explicitly list having a 1Mohm resistor, it does contain Converts a standard outlet into a groundable point for wrist straps and other grounding hardware with banana plugs. Perhaps before using such a product for a safety ground, rather than with a wrist strap, need to confirm with a multi-meter that no resistor is present.
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| Dec 21, 2023 at 12:07 | history | edited | Velvet | CC BY-SA 4.0 |
deleted 34 characters in body
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| Dec 21, 2023 at 12:05 | history | undeleted | Velvet | ||
| Dec 21, 2023 at 11:58 | history | deleted | Velvet | via Vote | |
| Dec 21, 2023 at 11:57 | comment | added | Justme | This isn't a correct product. The banana socket has 1Mohm resistor. Intended for ESD wrist straps. | |
| Dec 21, 2023 at 11:56 | history | answered | Velvet | CC BY-SA 4.0 |