Digital Multimeter HDM3055 Series Manual

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For Binning Auto, the algorithm starts by continuously readjusting the histogram span based on

the readings coming in, completely re-binning the data whenever a new value comes in outside of

the current span. After acquiring a large number of readings, a new reading outside of the range

causes the bins to be compressed by a factor of two such that the new bin range will cover the new

reading. The number of bins shown is a function of the number of readings received: 0 to 100

readings = 10 bins, 101 to 500 readings =20 bins, 501 to 1000 readings = 40 bins, 1001 to 5000

readings = 100 bins, 5001 to 10000 readings = 200 bins, >10000 readings = 400 bins.

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The Display and Digit Mask softkeys behave as they do in the Number display.

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The Scale softkey specifies the horizontal scale:

l Default sets the scale to equal the measurement range.

l Manual allows you to configure the scale either as High and Low values or as a Span around a

Center value. For example, a scale that goes from a Low of -500 Ω to a High of 1000 Ω could also

be specified as a Center of 250 Ω with a Span of 1500 Ω.

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Selecting a Secondary Measurement

Press 2nd Meas to select and display a secondary measurement. For example, for the DCV

measurement function, you can select ACV, Peak, or Pre-Math as the secondary measurement

function. With ACV selected as secondary, the display shows the DCV measurement as a number

near to top of the display, DCV in the bar meter, and the ACV measurement above the bar meter:

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Trend Chart  

To select the trend chart, press [Display] followed by the Display softkey:

In the Continuous measurement mode, the trend chart shows data trends over time:

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Recent/All

The Recent/All softkey shows either all of the data in the trend chart (All) or just the most recent data

(Recent). Neither selection clears reading memory.

In All mode, the trend chart displays all readings being taken and builds from left to right. After the display

is filled, the data becomes compressed on the left side of the display as new data is added on the right

side of the display.

Scaling

The Vertical Scale softkey specifies how the current vertical scale is determined.

Press Vertical, to change the scaling:

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l Default sets the scale to equal the measurement range.

l Auto automatically adjusts the scale to appropriately fit the line currently shown on the screen.

l Manual allows you to configure the scale either as High and Low values or as a Span around a

Center value. For example, a scale from a Low of 0 V to a High of 5 V is equivalent to a Center

of 2.5 V and a Span of 5 V.

If you have enabled limits, the (Limits) softkey also appears. This sets the vertical scale to match

the limits.

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Histogram

The histogram shows measurement data as a graphical representation of the distribution of measurement

data. Data is grouped in bins represented by vertical bars in the histogram display.

NOTE Autoranging can adversely affect the histogram display when measuring repetitive signals spanning

multiple ranges. To avoid this, select a fixed range when using the histogram display.

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Pressing the key, followed by the Display softkey allows you to select the display type:

Binning

The Binning softkey allows you to either let the instrument control how the histogram is binned (automatic binning),

or to manually specify the binning parameters with the Bin Settings softkey. Changing any binning parameter,

or switching between automatic and manual binning, will automatically start the histogram over with new data.

WisdomAugust

For Binning Auto, the algorithm starts by continuously readjusting the histogram span based on the

readings coming in, completely re-binning the data whenever a new value comes in outside of the

current span. After acquiring a large number of readings, a new reading outside of the range causes

the bins to be compressed by a factor of two such that the new bin range will cover the new reading.

The number of bins shown is a function of the number of readings received: 0 to 100 readings = 10 bins,

101 to 500 readings = 20 bins, 501 to 1000 readings = 40 bins, 1001 to 5000 readings = 100 bins,

5001 to 10000 readings = 200 bins, >10000 readings = 400 bins.

For Binning Manual, you can set number of bins to 10, 20, 40, 100, 200, or 400. You can specify the

bin range as either Low and High values, or as a Span around a Center value. For example, the

histogram range shown above (from -5 to 4 V) could be specified as a Low of -5 V and a High of 4 V,

or a Center of - 0.5 V and a Span of 9 V.