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Registered Member #3700
Joined: Sat Feb 19 2011, 12:59PM
Location:
Posts: 107
After reading for some time the 4HV threads, I beguin to be trouble with the proper spelling ... Anyone can advise ?
0.1 amper [A] or 0.1 Amper or 0.1 a or 0.1 coulomb per second ? ten kilowatt [kW] or ten Kilowatts [KW] ? one coulomb [C] or one Coulomb [C] or one ampersecond ? half volt [V] or half Volt [V] or 0.5 v or 0.5v ? ten meter [m] or 10M or 10 M or 10m ? 0.3 second [s] or 0.3 Second or 0.3s ? 2 microfarads or 2 Microfarads 2 MF or 2 mF ? six kilowatthours [kWh] or six Kilowatthours ? check your electrical bill. 12 kilohertz [kHz] or 12 Kilohertz or 10 KHZ ? What is the rule?
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Not too complicated, but many people get it wrong. Here's the first reference I opened out of a ton of search results: Here's a more official reference:
Be careful to remember the distinction between common symbols for variables (C for capacitance, I for current) and the associated units of measurement (F for farad, A for ampere).
The SI symbol for second (the time unit, not the angle unit) is lowercase s. ms is a millisecond. mS is a millisiemens (e.g. the conductance of a 1000 ohm resistor).
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
The SI multipliers all have a defined case. For example, m is milli but M is mega. So to avoid ambiguity you should always use the correct case: MW, kWh, kV and so on.
The SI units that were named after scientists get capital letters when abbreviated, but not when written out in full. The ones not named after scientists are lower-case always. kWh = kilowatt-hour.
When written out in full, the units are treated as ordinary nouns and the ordinary rules of spelling apply. Teslas are a unit of magnetic flux density. One tesla is equal to 10,000 gauss.
Some units have a two-letter abbreviation. If it was named after a scientist, the first letter gets capitalised. Oersted = Oe, candela = cd.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
i find reading helps alot with spelling, recently i ordered 3 very large electronics books: Art of Electronics, Power Electronics Handbook and one other that is on Inverter and Switchmode Design.
Not only do books help you learn and expand your knowlage, they really help with your spelling often!
Registered Member #3700
Joined: Sat Feb 19 2011, 12:59PM
Location:
Posts: 107
Hi Newton ;
You bat... Your spelling also looks good.
Steve has remembering very well, in recognation of the scientists that have contributed to the sciece, get capital letters when abbreviated, but not when written out in full.
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I hate technical spelling...
