Chapter 4 Features and Functions

Scanning

Scan Interval

You can configure the event or action that controls the onset of each sweep through the scan list (a sweep is one pass through the scan list):

∙You can set the instrument’s internal timer to automatically scan at a specific interval. You can also program a time delay between channels in the scan list.

∙You can manually control a scan by repeatedly pressing from the front panel.

∙You can start a scan by sending a software command from the remote interface (MEASure? or INITiate command).

∙You can start a scan when an external TTL trigger pulse is received.

∙You can start a scan when an alarm event is logged on the channel being monitored.

Interval Scanning In this configuration, you control the frequency of scan sweeps by selecting a wait period from the start of one sweep to the start of the next sweep (called the scan-to-scan interval). The count- down time is shown on the front-panel display between one scan sweep and the start of the next sweep. If the scan interval is less than the time required to measure all channels in the scan list, the instrument will scan continuously, as fast as possible (no error is generated).

Scan Count

(1 to 50,000 scans, or continuous)

Scan List (1 sweep)

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Scan-to-Scan Interval (0 to 99:59:59 hours)

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