UMG 509-PRO
64
www.janitza.com
11.3.4
Mains frequency
The device requires the mains frequency for the
measurement and calculation of measured values.
The device is suitable for measurement in net-
works whose mains frequency is in the range of
40 Hz to 70 Hz.
The mains frequency can be specified by the user
or determined automatically by the device.
·
Auto
- Factory default. The mains frequency is
measured.
·
50 Hz
- The mains frequency is fixed at 50 Hz.
The mains frequency is not measured.
·
60 Hz
- The mains frequency is fixed at 60 Hz.
The mains frequency is not measured.
Fig. Setting the nominal mains frequency
Automatic frequency determination
For automatic determination of the frequency
by the device, a voltage (V-Vref) of greater than
10 Vrms must be present on at least one of the
voltage measurement inputs.
If the measured voltage is not sufficiently high, the
device cannot determine the mains frequency and
therefore cannot carry out a measurement.
11.3.5
Temperature
When using a temperature measurement, select
the appropriate sensor type from a predefined list:
·PT100
·PT1000
·KTY83
·KTY84
Fig. Selection of the temperature sensor
