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a) Check, and if needed modify, the values of the basic parameters (see paragraphs
8.1 and 8.2).
b) Check, and if needed modify, the recording parameters by pressing MENU (see the
paragraph corresponding to the position of the rotary switch selected).
c) To start the recording press START (see chapter 6).
8.8.2. Using the Instrument in a Three Phase System
The maximum voltage between B1 and B4 inputs is 600 V~ (CATII) / 350V~
phase – earth or 600V~ (CATIII) / 300 V~ phase to earth.
Do not measure voltages exceeding the limits prescribed by this manual.
Should you exceed the voltage limits you could damage the instrument
and/or its components or endanger your safety.
The instrument is a single phase system. So you can analyse a three phase system
repeating 3 times a single phase analysis described in previous paragraph.
R
S
T
N
Instrument connection in a three-phase system
The Three Phase power values are given by:
Total Active Power = Pt = P1 + P2 + P3
Total Reactive Power = Qt= Q1 + Q2 + Q3
Total Apparent Power = St = √ (Pt
Page 86 of 131
CAUTION
B1
Red
2
2
+ Qt
VR2250
B2
B3
B4
Black
)
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