HP 34970A manual Scanning

Chapter 4 Features and Functions

Scanning

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During a scan, the instrument automatically adds a time stamp to all readings and stores them in non-volatile memory. Each reading is stored with measurement units, time stamp, channel number, and alarm status information. From the remote interface, you can specify which information you want returned with the readings (from the front panel, all of the information is available for viewing). The reading format applies to all readings being removed from the instrument from a scan; you cannot set the format on a per-channel basis.

∙From the remote interface, the time stamp information is returned either in absolute time (time of day with date) or relative time (time since start of scan). Use the FORMat:READ:TIME:TYPE command to select absolute or relative time. From the front panel, the time stamp is always returned in absolute time.

∙ The MEASure? and CONFigure commands automatically turn off the	4
units, time, channel, and alarm information.

∙A Factory Reset (*RST command) turns off the units, time, channel, and alarm information.

∙exx Vxytvx bxt”: The following commands select the format of readings returned from a scan.

FORMat:READing:ALARm ON

FORMat:READing:CHANnel ON

FORMat:READing:TIME ON

FORMat:READing:TIME:TYPE {ABSoluteRELative}

FORMat:READing:UNIT ON

The following is an example of a reading stored in memory with all fields enabled (relative time is shown).

1 Reading with Units (26.195 °C)	3 Channel Number
2 Time Since Start of Scan (17 ms)	4 Alarm Limit Threshold Crossed
	(0 = No Alarm, 1 = LO, 2 = HI)

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