Scope Multimeter General Reference
131
• Use a trigger to help stabilize the signal. Try and set the trigger at the mid-point
of the signal, and then adjust as needed from there. See Trigger on page 113.
• If the signal wraps off the top and bottom of the display, try and readjust the
vertical scale to a higher setting, to bring the signal into the viewable display
area. See Scale (Vertical scale adjustment).
• If the signal cycles are compressed (close to each other), try and readjust the
sweep scale (horizontal scale) to a lower setting to display less cycles. Try a
higher setting if the cycles are spread too far across the screen and seem flat.
See Sweep (Horizontal or Time scale adjustment) on page 108.
• Move the zero baseline marker to move the zero baseline of the signal vertically
on the screen to the desired position. See Trace (Zero Baseline position
adjustment) on page 111.
• Check calibration of test leads or probe(s) if applicable. See Test Lead / Probe
Calibration on page 105.
12.11.4 Units of Measurement / Conversions
Base Units
(Symbol) / Unit Prefix Typical Expressions
(µ) micro 0.000001 or 10
-6
or 1/1,000,000
(m) milli 0.001 or 10
-3
or 1/1,000
(c) centi 0.01 or 10
-2
or 1/100
(k) kilo 10
3
or 1,000
(M) mega 10
6
or 1,000,000
Electrical Units
(Symbol) / Description Equivalents
(V) Voltage V = I × R
(I) Current I = V ÷ R
(R) or (Ω) Resistance R = V ÷ I
(Hz) Frequency ƒ(freq.) = 1 ÷ T(time) or 1 cycle per second
Voltage
(µV) microvolt 1 µV = 0.000001 V
(mV) millivolt 1 mV = 0.001 V
(V) volt 1 V = 1000 mV
(kV) kilovolt 1kV = 1,000 Volts.
Ohms
(mΩ) milliohm 1 mΩ = 0.001 ohms
(Ω) ohm 1 Ω = 1000 mΩ
(kΩ) kiloohm 1 kΩ = 1000 Ω
(MΩ) megaohm 1 MΩ = 1,000,000 Ω
Amperes
(µA) microamps 1 µA = 0.000001 amps
(mA) milliamps 1 mA = 0.001 amps
(A) amps 1A = 1000 mA
(ka) kiloamps 1 ka = 1000 amps
Frequency
(MHz) megahertz 1 MHz = 1,000,000 Hertz
(kHz) kilohertz 1 kHz = 1000 Hertz
Pressure Units
(Symbol) / Description Equivalents
(psi) pounds per square inch
1 psi = 6894.757 Pa
1 psi = 0.06894757 bar
1 psi = 2.036021 inHg
(bar)
1 bar = 14.50377 psi
1 bar = 100000 Pa
1 bar = 29.52999 inHg
(Mbar) Millibar 1 Mbar = 0.001 bar
(Pa) pascal
1 Pa = 0.0001450377 psi
1 Pa = 0.00001 bar
1 Pa = 0.0002952999 inHg
(kPa) KiloPasca 1 kPa = 1000 Pa
(MPa) Megapascal 1 MPa = 1,000,000 Pa
(inHg) inches of mercury
1 inHg = 0.03386388 bar
1 inHg = 0.4911541 psi
1 inHg = 3386.388 Pa
Pressure Conversions
psi x 0.0689 = bar
psi x 6.8950 = kPa
psi x 0.0703 = kg/cm²
Electrical Units
(Symbol) / Description Equivalents
To Next Page
Loading...
