Digital Multimeter HDM3055 Series Manual

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The Outer Bins softkey displays two additional bins, for readings above and below the bin range.

For example, this image shows the Outer Bins softkey set to Off.

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The image below adds the outer bins to the display. The relatively large number of readings above

the bin range (the cyan bar) causes the bars within the bin range to shrink.

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The main histogram menu includes a Cumulative softkey that hides or shows a line representing

the cumulative distribution of the histogram data. Note that this line represents all of the data only

when the outer bins are shown; if the outer bins are not shown, the outer bin data is not represented

in the line. The cumulative distribution line always goes from 0 to 100% on the vertical scale,

regardless of the histogram’s scale.

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The final button on the histogram menu, Clear Readings, clears reading memory and starts a new

histogram.

Histogram Data

The graphic below shows a histogram of frequency measurements. Data is displayed on the left side

of the histogram. In the graphic below, reading from top left downward:

l 3.00000 kHz - present measurement value.

l 105 - Number of samples in the largest bin.

l 17.5% - Percentage of samples in the largest bin.

l Total 599 - Total number of samples.

l # Bins 20 - Total number of bins.

l 0, 2.5k, 5k - (Below the histogram) Range of frequency values.

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Histogram with Statistics

Showing statistics (Shift > Math > Statistics) is particularly useful for the histogram display. For example,

in the graphic below, the thick blue line is the average, and each thin blue line represents one standard

deviation from the average.

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Utility Menu - Introduction

The [Utility] key is the shifted [Display] key:

[Utility] provides the following features:

Store and Recall State and Preference Files

Manage files, including creating screen shots

Configure LAN (optional on HDM3065B), GPIB (optional on HDM3065H), and SCPI

Perform instrument self-tests and firmware update functions

Configure the instrument's date and time and various user settings

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Utility - Autocalibration  

Autocalibration compensates for drift caused by time and temperature changes in DC voltage and resistance

measurements, and adjust some aspects of other measurement functions.

To quickly perform autocalibration without editing the cal string message, press Shift > ACAL (Up Arrow) key.

Use the procedure below to use menus and softkeys to edit the cal string message and perform autocal

Step 1: Press Utility on the front panel.

Step 2: Press the Test/Admin softkey:

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Step 3: Press the Calibrate softkey:

Step 4: (Optional step) Press the Edit Cal String softkey and enter the information for the cal

string message. Common messages include the last calibration date, calibration due date, or

calibration department contact information. When finished, press the Done softkey

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Step 5: Press the Backup Cal softkey:

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Utility - Store and Recall State and Preference Files

The Utility menu is shown below.

Press Store/Recall to save and recall state and preference files. In general, state files store volatile

settings associated with measurements. Preferences are non-volatile parameters associated with

the instrument, but not any specific measurement.