DigiVac Bullseye Piezo 사용자 설명서 - 페이지 9

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atmosphere.

Display Line graph

The auto-scaling (or, auto-ranging) time graph is a microscope into the pump down data.

Maximum &

Minimum value

is measured

range

In this mode, the pump down graph is shown with a linear pressure scale that is fit to the pressure

range of the data set.

The height of the graph display is the pressure range of the data set in a linear scale (not log). The top

left figure is the maximum value in this range, and the bottom left figure is the minimum value in this

range. The top right figure is the current or most recent value in the instrument.

Please

Note: Sometimes this visualization is not useful, showing noise. This noise comes from the

instrument's process of measurement, as well as the vacuum system under measurement. In this

sense, the auto scaling graph is a data visualization microscope.

Useful Quick Tip:

This visualization can show a very small climbing or descending trend that the

vacuum analysis algorithm has not declared as a leak or pumping.

High Resolution

The High-Resolution format has three digits of precision. For example, an internal vacuum value of

1234 millitorr (μm Hg) would be displayed as 1.23 Torr in the Precision numeric format with Torr units.

Additionally, this format gives the raw vacuum measurement data which may be useful for trending

but may result in a noisier reading.

Scientific

The scientific format has two digits of precision with a base ten exponent following conventional

usage. For example, an internal vacuum value of 52 Torr (mm Hg) would be displayed as 5.2 x E

1 0 2 0 C a m p u s D r i v e W e s t , M o r g a n v i l l e , N J 0 7 7 5 1

s a l e s @ d i g i v a c . c o m w w w . d i g i v a c . c o m

7 3 2 - 7 6 5 - 0 9 0 0

Current or most

recent pressure