Snap-On ZEUS User Manual page 142

Scope and Multimeter Operations
Term / Abbreviation
RMS
Sample Rate
Sampling
Screen Update Rate
Signal
Square Wave
Sweep Scale
Threshold
Trace
Trigger
Trigger Slope
VAC
VDC
Description
The RMS (root mean square) value of
alternating currents and voltages is the effective
current or voltage applied, rather than the peak
current or voltage measurable. The AC RMS
voltage value can be defined as the equivalent
DC voltage of the AC voltage measured. RMS
values are commonly used in AC electrical
measurement, as they are more representative
of DC measurements.
Number of times (frequency) the scope/meter
takes a sample of the signal. Specified in mega
samples per second (MS/s).
Process of obtaining a sequence of
instantaneous values for a signal at regular or
intermittent intervals. When a quantity of
samples are collected the operational status of
the device is determined.
How often the captured data is (updated)
displayed on the screen.
Detectable voltage, current, or magnetic field, by
which specific information is transmitted in an
electronic circuit or system.
A square or rectangular waveform (digital) which
alternately switches high to low (on/off) for
specific lengths of time, that has very fast rise
and fall times.
The horizontal scale on the grid. Also referred to
as time scale or x axis.
The threshold function automatically sets a
trigger and determines a threshold level in the
middle of the signal range (calculated from the
Min and Max measurements) to be used as a
reference point to calculate the measurement.
The actual visible line displayed on the scope
screen.
A conditional function that initiates if and when a
trace is drawn on the screen.
The slope that a trigger source signal must reach
before the trigger circuit initiates a sweep.
Volts Alternating Current.
Volts Direct Current.
Term / Abbreviation
Vertical Scale
Volt
Voltage
Voltage (inductive) Kick
Waveform
Zero Base Line
135
General Reference
Description
The vertical scale on the grid or (y-axis)
represents what is being measured (voltage,
amperage, pressure etc.), and the unit of
measurement it is being measured in.
Unit of electric potential difference.
Electromotive force or potential difference,
expressed in volts.
A voltage, many times higher than the applied
voltage, produced by the collapsing magnetic
field in a coil when the current through it is
abruptly terminated.
The graphic representation (form) of a signal
over time, which the trace displays on the
screen.
Reference setting or 0% level of a graph scale.