PCE Instruments F 09 Notice De Fonctionnement page 38

- Acceptable amplitude imbalance rate: 20%
- Acceptable voltage harmonic distortion: 10%
Running of phase rotation direction detection
I I I I I
sequence
Note 1:
In the following table, display of the symbol "
systematically to the beginning of sequence
Note 2:
The sequence of the following table is described using:
- L1 on terminal "COM"
- L2 then L3 on terminal "+"
The same result is obtained if:
- L2 on terminal "COM" , L3 then L1 on terminal "+"
or:
- L3 on terminal "COM" , L1 then L2 on terminal "+"
Note 3:
The measurement principle is based on a certain frequency
stability and practically sinusoidal signals (THD < 10%).
This excludes in particular measurement on power
generators whose spin stabilisation system is too weak to
ensure adequate frequency stability.
Action Display
Switch on
the position
Press rEF
the yellow key
Cable connected
black on L1 and
contact displays
red cable on L2
Err V (2 s) then
Err V (2 s) then
rEF OK
Red cable contact
on L3 (less than
10 seconds after
leaving L2)
MEAS
Err V (2 s) then
Err V (2 s) then
Err
1.2.3
3.2.1
Press yellow key
" refers
Comments
Enter the function
The unit is ready to detect
the reference period
after 10 seconds maximum
result is one of the 3 following
opposite:
→ if voltage < 50 V
→ if nominal freq. ≠ 50 Hz or 60 Hz
→ if reference period correct
The unit determines the period
measurement, the following
messages may be displayed
(after 10 s max) :
→ determination of period
for measurement in progress
→ contact on L3 a was performed
too late (more than 10 s
after display rEF OK)
→ voltage incorrect
→ frequency incorrect
→ determination of phase
direction impossible
→ direct direction of phase
rotation
→ reverse direction of phase
rotation
Return to beginning of sequence
(valid at all times in the
sequence)
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