Turn the tuner (tuning) guitar string slowly, Pick multiple times (by hand only), compared with other strings to the same pitch, with provisions such as the following:
1. Ringing Strings No. 1 (E) los tone strings strings = no 2 (B) FRET to 5 (stringed strings both with fingers of one hand press the strings on the fret number 2 to 5)
2. Ringing Strings no 2 (B) los tone strings strings = no 3 fret 4 (picking third string with the fingers of one hand press the strings on the fret number 3 to 4)
3. The string tone No. 3 (G) los tone strings strings = No 4 fret 5 (quotation fourth strings with the fingers of one hand press the strings on the fret no 4 5)
4. Ringing Strings no 4 (D) los tone strings strings = no 5 fret 5 (picking fifth strings with the fingers of one hand press the strings No 5 on fret 5)
5. Ringing Strings no 5 (A) los tone strings strings = no 6 fret 5 (picking sixth strings with the fingers of one hand press the strings on the fret no 6 to 5)
Los strings are plucked guitar strings only, without pressing our fingers on the fretboard
For the rules of music both vocal tone frequency or musical instrument has actually been following the internationally accepted standards The tone of the international standard is used as a tone with a frequency of 440 Hz (hertz), so the modern musical instruments (such as traditional gamelan example does not follow the standard TSB) anywhere in the world will follow these standards. Now the question is: how do we know if the tone A on the guitar when we have stem = 440 Hz? . We need to use a standard measuring instrument tones, namely:
1. could use a tuning fork (can be purchased at music stores), how to wear it quite Tap a tuning fork to a specific object (table for example) then it will sound in accordance with a certain tone, each tuning fork has a certain tone, usually C or A (factory default)
2. using a digital guitar tuner (can be purchased at music stores as well), how to use it, there is usually a sort of guidebook that came when we bought it.
3. use other instruments as comparison, can with a piano / keyboard for example. For example, for instance with the piano, can be read on http://budisapt.blogspot.com/2008/12/menstem-gitar-dengan-cara-membandingkan.html
4. with music software on your computer, such as guitarpro which already includes digital guitar tuner in it
5. some also have electric guitar effects include the digital guitar tuner in it 
