Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
Last revision Both sides next revision
equipment:oscilloscopes [2019/05/09 11:36]
tggzzz
equipment:oscilloscopes [2020/10/24 10:49]
tggzzz
Line 1: Line 1:
 ===== Oscilloscopes ===== ===== Oscilloscopes =====
  
-====Safety====+Since the oscilloscope and probe become part of the circuit being tested, it is also necessary to understand //and apply// the information on the [[equipment:oscilloscopeprobes|oscilloscope probes]] page. If in doubt (especially about safety), please ask before damaging scopes or people.
  
 +====Safety====
 Oscilloscopes can be used dangerously, especially when connecting to anything connected to the mains voltages. **Getting it wrong can result in __loud__ noises followed by __deathly__ slience**.     Obviously **electrocution** is a potential danger, but incorrect connections can also **melt** scope probes, cause **fires**, as well as **destroying** the **scope** or **unit** being tested. You may be surprised how mains earths can and do cause those problems. Internally scopes contain >**8kV**, and they can retain the charge long after the scope is switched off. Oscilloscopes can be used dangerously, especially when connecting to anything connected to the mains voltages. **Getting it wrong can result in __loud__ noises followed by __deathly__ slience**.     Obviously **electrocution** is a potential danger, but incorrect connections can also **melt** scope probes, cause **fires**, as well as **destroying** the **scope** or **unit** being tested. You may be surprised how mains earths can and do cause those problems. Internally scopes contain >**8kV**, and they can retain the charge long after the scope is switched off.
  
Line 27: Line 28:
 **Do not, under any circumstances whatsoever, disconnect an earth**; the results can kill you or - worse - can kill someone else. Use the proper type of probe!  **Do not, under any circumstances whatsoever, disconnect an earth**; the results can kill you or - worse - can kill someone else. Use the proper type of probe! 
 (If you //really// think you need to "float a scope" see the picture in the footnote to understand the //necessary minimum//. **Then don't do it** :) ) (If you //really// think you need to "float a scope" see the picture in the footnote to understand the //necessary minimum//. **Then don't do it** :) )
 +
 +**Do not use any of HackSpace's scope probes for measuring mains equipment and voltages**, and that includes inside SMPSs.
  
  
Line 94: Line 97:
 ^::: |Equivalent to the Tek 2245, but softbutton menus slightly less suitable for casual use |Move "soft knobs" in both directions, including after autosetup |Only analogue storage scope, traditionally less convenient than digital storage | ^::: |Equivalent to the Tek 2245, but softbutton menus slightly less suitable for casual use |Move "soft knobs" in both directions, including after autosetup |Only analogue storage scope, traditionally less convenient than digital storage |
 ^::: |Small size/weight |Medium size/weight | **Extender cards and manuals** for maintenance | ^::: |Small size/weight |Medium size/weight | **Extender cards and manuals** for maintenance |
-^::: | |**OUT OF ACTION**. //Do NOT use//. An unknown person "floated" this scope by disconnecting the protective mains earth. Apart from being **lethally dangerous** [[http://bristol.hackspace.org.uk/wiki/doku.php?id=oscilloscopes#safety|as noted above]], it may have been damaged internally. It has been PAT tested, but must be disassembled and the PSU capacitors checked and/or replaced by a person skilled in that task. |Dual beams very rare |+^::: | |**OUT OF ACTION**. //Do NOT use//. An unknown person "floated" this scope by disconnecting the protective mains earth. Apart from being **lethally dangerous** [[oscilloscopes#safety|as noted above]], it may have been damaged internally. It has been PAT tested, but must be disassembled and the PSU capacitors checked and/or replaced by a person skilled in that task. |Dual beams very rare |
 ^USP |Fast, 4 channels |Fast, 4 channels, excellent triggering, standard controls | Sensitive, three channel, storage | ^USP |Fast, 4 channels |Fast, 4 channels, excellent triggering, standard controls | Sensitive, three channel, storage |
 ^   |{{ :oscilloscope:isotech-isr1014.jpg?direct&100 |}} |{{ :oscilloscope:tektronix2245.jpg?direct&100 |}}  |{{ :oscilloscope:telequipmentDM63.jpg?direct&100 |}} | ^   |{{ :oscilloscope:isotech-isr1014.jpg?direct&100 |}} |{{ :oscilloscope:tektronix2245.jpg?direct&100 |}}  |{{ :oscilloscope:telequipmentDM63.jpg?direct&100 |}} |
Line 116: Line 119:
 ^USP |Small, medium speed, easy |Sensitive, printing |  ^USP |Small, medium speed, easy |Sensitive, printing | 
 ^    |{{ :oscilloscope:topward-7042.jpg?direct&100 |}} | {{ :oscilloscope:metrotest-ox8020.jpg?direct&100 |}}| ^    |{{ :oscilloscope:topward-7042.jpg?direct&100 |}} | {{ :oscilloscope:metrotest-ox8020.jpg?direct&100 |}}|
- 
  
 === For Disposal === === For Disposal ===
-Since they were either faulty or a pain to use, and we had better scopes with these features, in February 2019 we disposed of these scopes: Wavetek 9020, Gould OS300, Tek TDS340, Schlumberger 5602.C, Hameg HM203. +Since they were either faulty or a pain to use, and we had better scopes with these features, in February 2019 we disposed of these scopes: Wavetek 9020, Gould OS300, Tek TDS340, Schlumberger 5602.C, Hameg HM203
 + 
 +To make more room and to reduce the equipment that needed to be moved to the new premises, in October 2020 we disposed of the Tektronix DM63 and the Topward 7042.
  
 If you want to see their features, look at an earlier revision of this page. If you want to see their features, look at an earlier revision of this page.
 +
 +==== Current Scope Location ====
 +
 +(this will be updated after the move)
 +
 +{{ :equipment:oscilloscopes_a.jpg?nolink |}}
 +{{ :equipment:oscilloscopes_b.jpg?nolink |}}
 +
 +
  
 ---- ----
  • equipment/oscilloscopes
  • Last modified: 12 months ago
  • by tggzzz