User's Manual

Fluke 434-II/435-II/437-II
Users Manual
22-2
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The Meter screen gives an overview of the following measuring results:
V rms the rms value of the nominal voltages
V tol% voltage tolerance
V imb% voltage imbalance
Please notice that the definition of Voltage imbalance according to MIL-
STD-1399-300B is different from the definition of unbalance in the function
Unbalance described in Chapter 14.
Unbalance uses the method of symmetrical components (see
IEC61000-4-30).
Imbalance uses the maximum deviation from the average voltage.
V mod voltage modulation
A rms the rms value of the currents
A imb% current imbalance. Please notice that the definition of Current imbalance for
this function is different from the definition of unbalance in the function
Unbalance dewscribed in Chapter 14.
Unbalance uses the method of symmetrical components (see
IEC61000-4-30).
Imbalance uses the maximum deviation from the average current.
Hz Frequency
Hz 10s Frequency 10s
Hz tol Frequency tolerance (absolute)
Hz tol% Frequency tolerance relative (%)
Hz mod Frequency modulation (absolute)
Hz mod% Frequency modulation relative (%)
Use the up/down arrow keys to scroll the Meter screen.
The figures in the Meter screen are present values that may update constantly. Changes in
these values over time are recorded as soon as the measurement is turned on. The
recording is visible in the Trend screen.
Logging.
All measuring values in meter screen are logged. Refer to Chapter 3, paragraph Logging
of Measuring Values for more information.
The Cycle Aggregation Interval for rms based measurements such as Vrms and Arms can
be set to 10/12 cycles or 150/180 cycles. To adjust press in sequence: the SETUP key,
F4 – MANUAL SETUP, F3 – FUNCTION PREF and the up/down arrow keys to select
Cycle Aggrega(tion) and use the left/right arrow keys to adjust.