Test Products International 460 - Manual (Page 50)

per digit Orange, yellow and Green are common LED colors.
Load A device that is driven by the output of a meter or other measuring
or control equipment. An example of a load is a resistor being
measured by a multimeter. The resistor “loads” the meter since it
becomes part of the measuring circuit.
Microprocessor Integrated circuits which perform many instructions per second
for functions such as mathematical equations,data storage, display
updates, etc. Microprocessors are at the heart of computer
accuracy, repeatability and speed. Also called CPU’s (Central
Processing Units).
Min/Max A function of a measuring device which records (saves) the highest
and lowest reading it has encountered since being reset (cleared)
or powered up.
Multiplexer A device that sequences access to a communication port. Several
different devices can share a single COM port on a computer if
they are multiplexed.
Overload A signal that is greater than that which a measuring device can
accurately or safely accept. Many meters have overload protection
in the form of a fuse, or similar device, to protect the meter from
overload input.
Over Range Visual display alerting the user that the signal present at the
Indication meter’s input is out of range.
Peak Hold The ability of a measuring device to hold the highest reading until
the user clears the display. Also known as Peak Detect.
Relative Mode Displays the difference between the measured value and the stored
value.
Relative % Mode Displays measured value as a percentage of stored value for
checking component tolerances.
Power Factor This is the ratio of Watts to VA, or True Power* divided by
Apparent Power. This can be expressed as a decimal or
percentage, i.e. : PF=0.65 or PF=65%. True Power is never
greater than Apparent Power, so the Power Factor is never greater
than 1. Power Factor may also be expressed as Cosine F*
Probe Select Most probes are only mechanically different. However when they
460 User s Guide Glossary
C-4