Mastech MS5308 - Safety Instructions; Description; Definition Description; Impedance Parameter Description

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2. Safety instructions:
Operating environment and condition:
● Elevation ＜ 2000 m
● Relative humidity (RH) ≦ 80%RH
● Operating temperature 0 – 40°C
Note: DO NOT input voltage at the measurement port. When
measuring capacitance, please discharge first then measure,
otherwise, the meter will be damaged.
Storage and maintenance: Do not use alcohol or other solvents
to clean the meter. If it will not be used for long time, please
remove battery and put the meter in a dry and clean
environment.
3. Description:
3.1 Definition Description
APO: Auto power off
LCR: This character showing on the LCD means that the tester
works in automatic identification mode
L
P:
Inductance parallel connection measurement mode
L
s:
Inductance series connection measurement mode
C
P:
Capacitance parallel connection measurement mode
C
s:
Capacitance series connection measurement mode
R
P:
Resistance parallel connection measurement mode
R
s:
Resistance series connection measurement mode
DCR: Resistance DC measurement mode
D: Wastage factor
Q: Quality factor
θ: Phase angle value
ESR: Equivalent resistance
DUT: Object for measuring
3.1 Impedance parameter description (see Figure Ⅰ )
Z= R
s
+jX
s
∠
=|Z| θ R
s-
=|Z|Cosθ X
s
= |Z|Sinθ
X
s
/R
s
=Tanθ θ=Tan
-1
(X
s
/R
s
)
If θ > 0, it means that the measured object is resistant, if θ < 0, it