Unipulse F331 Operation Manual

Contents

Unipulse F331 Operation Manual Manual pdf 27 page image

185 SETTING OF FUNCTIONS18SETTING OF FUNCTIONSChapter55-3. Near zeroBy this function, it is detected that the indicated value is near zero.ON condition: | indicated value | ≦ near zero setting value (0 is excluded.)OFF condition: | indicated value | > near zero setting value5-4. Comparison timingSet the operating condition of HI-LO limit comparison.Always: Comparison is always performed.NZ: Comparison is performed when near zero is OFF.Hold/Judge: Comparison is performed when indicated value is held(external judging input is ON when hold mode is OFF).NZ:+Hold/Judge Comparison is performed when near zero is off and indicated value is held(external judging input is ON when hold mode is OFF).5-5. Digital offsetThis function subtracts a set value from the indicated value. If you make digital offset , the valuewhich is obtained by subtracting the set value from the indicated value will be displayed. This isconvenient when you cannot obtain zero by unloading the equipment for some reason or when youwant to give offset.(Indicated value to be displayed) = (Actual indicated value) - (Digital offset setting value)5-6. Moving average filterThis function restrains the indicated value from fluctuating by moving-averaging the A/Dconverteddata. The moving average times can be selected in the range of OFF (1 time) - 512 times. With anincreasing number of moving average times, the indicated value becomes more stable, while theresponse becomes slower. On the other hand, with a decreasing number of moving average times,the response becomes faster, while the indicated value becomes easier to fluctuate.5-7. Digital low pass filterThis low pass filter cancels undesired noise components by filtering the A/D-converted data. Setthe cutoff frequency like a low pass filter in an analog circuit. The cutoff frequency can be selectedfrom 3, 6, 12Hz. Select an optimum value according to the type of measurement and settingenvironment.Near zero ON/OFF is closely related to the Comparison timing.See "5-4.Comparison timing" on page 18.Point