Measurement / Calculation Methods - Vemer ADR Series User Manual

13a) Setting the time and date (not in the spot version)
• When "T" is pressed from one of the time display pages, the time and date can be
set
• Press the "up" ( ) or "down" ( ) keys to select the required value of the
flashing number
• Press "pK" to move to the next number
• The "T" key can be pressed at any time to return to the time display page, with the
memorisation of the modifications entered
Note: up to the entry of the first setting, the time and date will flash.
The time and date will also flash in the peak value pages.
MEASUREMENT / CALCULATION METHOD
• The voltage and current measurements take place in (True RMS) by means of
sampling and analogue-digital conversion.
• To calculate the system values, the following formulas are used:
System voltage
System current
Active system power
Reactive system power
Apparent system power
System power factor
h
T
V 1 + V 2 + V 3
V =
I 1 + I 2 + I 3
I =
P = P 1 +P 2 +P 3
Q = Q 1 +Q 2 +Q 3
A =
PF =
- 36 -
ADR Network analyser - User's guide
pK
h
T
3
3
(addition)
P + Q
2 2
P
A