Differences

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

--- ews:equipment:start [2020/05/03 08:21]
piumarta [Multimeters]
+++ ews:equipment:start [2020/05/06 10:28] (current)
piumarta
@@ Line 14: / Line 14: @@
 The display shows the current temperature of the tip.
-** SAFETY: ** When not in use the soldering station should be either physically unplugged, or switched off at __both__ the soldering station __and__ the power outlet to which it is connnected.
+** SAFETY: ** When not in use the soldering station should be either physically unplugged, or switched off at __both__ the soldering station __and__ the power outlet to which it is connnected. \\
+**安全:** 使用しない場合は、はんだ付けステーションのプラグを物理的に抜くか、 電源コンセントと接続されているはんだ付けステーションの両方の電源スイッチをオフにしてください。
 {{:ews:equipment:soldering-switch-p1350512.jpg?direct&200|}} {{:ews:equipment:outlet-switch-p1350513.jpg?direct&200|}}
@@ Line 28: / Line 29: @@
 The standard solder in the workshop contains 60% tin, 37.5% lead, and 2.5% silver (to increase electrical conductivity).
-** SAFETY: ** Solder contains flux which burns when heated.  Avoid inhaling the fumes.
+** SAFETY: ** Solder contains flux which burns when heated.  Avoid inhaling the fumes. \\
+**安全：** はんだには、加熱すると燃える溶剤が含まれています。 煙を吸い込まないようにしてください。
-** SAFETY: ** Because solder contains lead, you should wash your hands after soldering and avoid using your mouth to pull more solder out of the reel.
+** SAFETY: ** Because solder contains lead, you should wash your hands after soldering and avoid using your mouth to pull more solder out of the reel. \\
+**安全：** はんだには鉛が含まれているため、はんだ付け後は手を洗って、はんだを口に含まないようにしてください。
 == (D) Fume extractor ==
@@ Line 93: / Line 96: @@
 The large rotary switch has two more positions, from left-to-right:
+<HTML>
-  - μA measures DC or AC current in microamps.
+  <ol start="6">
-  - mA measures DC or AC current in milliamps.
+    <li> μA measures DC or AC current in microamps. </li>
+    <li> mA measures DC or AC current in milliamps. </li>
-<WRAP clear></WRAP>
+  </ol>
+</HTML>
 {{ :ews:equipment:dmm-covers-p1350524.jpg?direct&200|}}
-** WARNING: ** do not attempt to measure currents higher than 400mA as this will blow the internal fuse and the multimeter will stop working.
+** WARNING: ** do not attempt to measure currents higher than 400mA as this will blow the internal fuse and the multimeter will stop working. \\
+**警告：** 400mAを超える電流を測定しないでください。内部のヒューズが溶断し、マルチメータが機能しなくなります。
 ** NOTE: ** The test lead connectors have protective covers which should be removed before use.
@@ Line 129: / Line 134: @@
   - DCV (null) measures DC voltage of either polarity.  0v is indicated by a meter reading in the centre of the display.
   - ACV measures AC voltages.
-  - OFF is exactly what is says.  Return the selector to this position when the meter is not in use.
+  - OFF is exactly what it says.  Return the selector to this position when the meter is not in use.
   - Ω measures resistance.  Setting the range to "x1" enables a buzzer that indicates electrical continuity (0Ω resistance).
   - DCmA measures DC current in milliamps.
-** SAFETY: ** Do not attempt to measure voltages larger than 250v as the insulation on the probes will not protect you!
+** SAFETY: ** Do not attempt to measure voltages larger than 250v as the insulation on the probes will not protect you! \\
+**安全：** プローブの絶縁耐圧を超えて危険なので250Vを超える電圧を測定しないでください。
-** WARNING: ** Do not attempt to measure currents larger than the indicated range or an internal fuse will blow and the meter will stop working.
+** WARNING: ** Do not attempt to measure currents larger than the indicated range or an internal fuse will blow and the meter will stop working. \\
+** 警告：** 表記の範囲を超える電流を測定しないでください。内部のヒューズが飛んでメーターが機能しなくなります。
 ** NOTE: ** The test leads have protective covers over the connectors which must be removed before use.  Do not lose them and always replace them after use.
@@ Line 162: / Line 169: @@
   * Connect the + (longer) lead of the capacitor to the red clip.  Connect the - (shorter, marked with a stripe) lead of the capacitor to the black clip.
-** SAFETY: ** never touch the leads of a large electrolytic capacitor as the discharge current can burn or even kill you.  Never use a piece of metal or wire to discharge a large electrolytic capacitor as the current can cause heating that permanently welds the metal to the capacitor's leads or terminals.
+** SAFETY: ** never touch the leads of a large electrolytic capacitor as the discharge current can burn or even kill you.  Never use a piece of metal or wire to discharge a large electrolytic capacitor as the current can cause heating that permanently welds the metal to the capacitor's leads or terminals. \\
+**安全：** 大きな電解コンデンサのリードには絶対に触れないでください。放電電流によって火傷したり、死亡する可能性があります。 大きな電解コンデンサを放電するときは、金属片やワイヤを使用しないでください。電流が原因で、金属がコンデンサのリード線または端子に永久的に溶接されて加熱される可能性があります。
 ** NOTE: ** the meter comes with a small, green bridging circuit that can be plugged in above the test lead connectors.  You should not need to use it.  Ignore it but also be careful not to lose it.
@@ Line 178: / Line 186: @@
 {{ :ews:equipment:keysight-dsox4024a-p1350509.jpg?direct&200|}}
 {{ :ews:equipment:keysight-28w2467-40-ann.png?direct&200|}}
+Digital storage oscilloscopes can store a waveform for you to pan around and zoom into later.
+Waveforms can also be exported as files for processing in your own software.
+Their disadvantages include
+limited vertical resolution (they typically use 8-bit D/A converters),
+aliasing (a problem with any digital system that samples analogue waveforms),
+and poor X-Y mode performance (used for analysing phase differences, channel separation, etc.).
 == Basic operation ==
@@ Line 209: / Line 224: @@
 {{ :ews:equipment:tek-mdo3102-p1350515.jpg?direct&200|}}
 {{ :ews:equipment:tek-mdo3102-ann.png?direct&200|}}
+Mixed-domain oscilloscopes allow analogue and digital signals to be captured and analysed at the same time.
+A large bandwidth of 1 GHz is useful for analysing parasitic oscillation in typical op-amp circuits.
 == Basic operation ==
@@ Line 243: / Line 261: @@
 Like analogue multimeters, analogue oscilloscopes react faster to input changes than digital ones.
-Good ones also have much better vertical resolution.
+They also have much better vertical resolution and can show finer details in the signal.
-Their disadvantages are that they cannot store a long signal to be inspected closely later, and they cannot perform the same range of mathematical operations as a digital oscilloscope.
+Their disadvantages are that they cannot store or export a signal for later inspection or analysis, and they cannot perform the same range of mathematical analyses as a digital oscilloscope.
 == Basic operation ==

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