Search results
Results from the WOW.Com Content Network
Thus a meter with a 50 μA movement will have a "sensitivity" of 20,000 Ω/V. "Per volt" refers to the fact that the impedance the meter presents to the circuit under test will be 20,000 Ω multiplied by the full-scale voltage to which the meter is set. For example, if the meter is set to a range of 300 V full scale, the meter's impedance will ...
Isolation resistance measurements may be achieved using a high input impedance ohmmeter, digital multimeter (DMM) or current-limited Hipot test instrument. The selected equipment should not over-stress sensitive electronic components comprising the subsystem.
Enable the Input menu (via the 'Input Sources' panel of the 'Keyboard' System Preferences). This gives access to: the Keyboard Viewer, which can be used to view and input characters accessed via the ⌥ Option key; the Character Viewer, which can be used to access any Unicode character. It is also available from the Special Characters tool
The actual output impedance for most devices is not the same as the rated output impedance. A power amplifier may have a rated impedance of 8 ohms, but the actual output impedance will vary depending on circuit conditions. The rated output impedance is the impedance into which the amplifier can deliver its maximum amount of power without failing.
First, the meter needs to be zeroed by shorting the measurement points together and performing an adjustment for zero ohms indication prior to each measurement. This is because as the battery voltage decreases with age, the series resistance in the meter needs to be reduced to maintain the zero indication at full deflection.
Most English-language keyboards do not have a "μ" key, so it is necessary to use a key-code; this varies depending on the operating system, physical keyboard layout, and user's language. For all keyboard layouts. On Microsoft Windows systems, arbitrary Unicode codepoints can be entered in decimal with: Alt sustained, 0 1 8 1, and releasing Alt ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the shift, alt and control state of the keyboard.