Siemens SENTRON PAC5200 Device Manual page 34

4 Measurands and Recording
4.1 Measuring and Recording System
4.1.2.3 Trend Recorder
The trend recorder ensures the acquisition and long-term monitoring of the voltage V
changes. If a change of the measured value compared to the RMS value recorded last occurs during the
parameterized measuring interval, which exceeds or falls below the tolerance limit, this new RMS value will be
recorded.
V
100
50
0
-50
-100
Figure 4-5
Once the measuring interval has been finished, the next measuring interval starts automatically.
You can set the following parameters via the user interface:
• Tolerance unit (% or numerical)
• Voltage tolerance range (1 % to 5 % referred to the primary nominal voltage)
• Maximum recording interval (10 min to 24 h)
34
0.6 0.7
Functioning of the Trend Recorder, Voltage Interruption
V (1/2 ) value
rms
0.8 0.9
SENTRON PAC5100/5200, 7KM5212/5412, Device Manual
E50417-H1040-C568-A1, Edition 03.2015
(1/2) during voltage
rms
s
1.0