PPA5xx/15xx user manual
6-4
6.2 Low Value Blanking
When enabled in the SYS menu Low Value Blanking will
result in parameters displaying values that are below
specified thresholds to display 0.0000. This is useful to
avoid displaying noise and false frequencies.
The low value blanking thresholds are:
45% for Range 1
25% for Range 2
15% for all other ranges
Note: When using the 3 phase 2 wattmeter + phase 3
wiring option there must be an input to PH1/P2 otherwise
low value blanking may be triggered.
High Frequency Blanking
In addition to low value blanking mentioned above the
instrument also checks for high frequency spikes. The
instrument will also blank the display when high frequency
noise spikes are detected to avoid displaying invalid data.
This is more likely to be seen on the PPA5xx due to the
lower frequency range when compared to the PPA15xx.
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