G
ETTING
S
TARTED
PM100 / 300 U
SER
M
ANUAL
P
AGE
4 VPN 98-052
FREQ
Frequency
The frequency of the input waveform is obtained using the [FREQ] key. The
lowest of the frequencies detected on the Channel 1 V and A inputs is
displayed. This frequency is used as the fundamental for harmonic analysis.
FUND Fundamental value.
V.f, A.f, W.f, VA.f, Var.f, PF.f
The fundamental (1st Harmonic) component of the 6 basic measurements are
quickly shown by using the [FUND] key.
PF.f is the power factor due to the fundamental components of voltage and
current. This is equivalent to cos∅ in a sinewave system. Cos∅ has a sign to
denote leading or lagging current, and the convention used is shown below:
0
°
-90
°
-180
°
-270
°
-360
°
W + - - +
PF.f - - + +
Var.f + + - -
For Watts, + or - indicates the direction of the power flow.
For PF.f, + indicates that I leads V (Capacitive).
For Var.f + indicates an inductive load.
The sign used to indicate fundamental power factor may be reversed in menu 4.
For example;
Press [MENU]
SELECT MENU
M[0] Outputs
Press [4] or [>] until you see the following display;
SELECT MENU
M[4] Key Options
Press [↵]
PF LEADING
>-< +
Press [<] and [>] to make your selection
PF LEADING
- >+<
Press [↵] to move to the next item in the menu system,
or,
press [MENU] to exit the menu system and return to the measurement
display.
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