unit dose. a method of preparing medications in which individual doses of patient medications are prepared by the pharmacy and delivered in individual labeled packets to the patient's unit to be administered by the nurses on an ordered schedule. One intent of unit dose is to decrease administration error.
Itâs a little bit harder to determine the polarity with Surface Mount LEDS. Some are marked with a (-) to indicate the negative lead, but often, they are not. The single best way to determine the polarity is through the use a multimeter. Surface Mount LED. Set the multimeter to the diode/continuity setting.f the LED has two leads with leads that are equal in length, you can look at the metal plate inside the LED. The smaller plate indicates the positive (anode) lead; the larger plate belongs to the negative (cathode) lead.
#8. zgozvrm. There is no positive or negative wire in AC since the current changes directions periodically (60 times per second). Household AC systems (in the U.S.) are usually comprised of 3 wires: A hot black wire, a neutral white wire, and a ground wire which can be either green or bare (no insulation at all).