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6.2.1.1 Once measurement interface
In the noise measurement interface, when the menu in the measurement mode
displays “Once”, the meter goes to “Once” measurement mode. In the “Once” measure-
ment interface, there are two display modes: List and Fig. interface.
6.2.1.1.1 List measurement interface
The list interface has two pages: List1 and List2. In this interface, the meter synchro-
nously displays six measurement indexes on one screen. The display content includes
Instantaneous value and Statistic value, shown below:
“Sta.1: A F:” means the current weighting is A frequency weighting and F time weight-
ing. When the cursor is on “Sta.1: A F”, the user can press or keys to enter “Sta.2:
Z F” measurement interface which means the current weighting is Z frequency weight-
ing and F time weighting. “Sta.1” and “Sta.2” open at the same time in the measurement
interface which can be displayed switchover, and the operation won’t affect the
measurement result.
The black background frame in the middle shows six measurement indexes of the
current frequency weighting and time weighting in the “List1”: Linst, Leq,T, Lmax, Lmin,
L10, L50 and L90. The indexes shown in “List2” include: Linst, Lmin, L5, L95, SEL and SD.
6.2.1.1.2 Fig. measurement interface
When the cursor is on “List2”, the user can enter Fig. display interface by pressing or
keys. The statistic distribution graph and accumulative distribution graph is displayed
in the interface. When the measurement is started, the statistic distribution graph and
accumulative distribution graph are calculated at the same time and refreshed every
0.5 second.
