Fluke 5020A user manual Comm Setting

5020A

Users Manual

occur with the North America daylight saving mode if the daily stats record time is 01:00, since this time will occur twice in one day.

Another effect is with viewing data on a graph in real time. Data is plotted on the graph sequentially as measurements are made and the graph is scrolled uniformly. No adjustment is made to the real-time graph when the time changes. However, when a graph is redrawn (using recorded data, as a result of changing the display layout or cycling the power) in preparation to resume real-time plotting, the thermo-hygrometer attempts to accurately plot measurement points at the appropriate time locations. Thus, a one-hour spring daylight saving time shift will appear as a one-hour gap in the data on the graph. When a jump backwards is found in the recorded data, such as occurs during the fall daylight saving time shift, the thermo-hygrometer makes no attempt to plot the data prior to the time shift; there will appear to be missing data on the left side of the graph.

Graphs drawn using the DATA VIEW function behave similarly when time discontinuities occur in recorded data. A one-hour jump forward in time causes a one- hour gap in the data on the graph. However, a one-hour jump backwards in time produces a graph that also includes the data prior to the time shift. The repeated hour of data is also plotted but is compressed into one time point, the time just prior to the time shift. In other words, the data prior to the time shift is plotted first. Then when data for the first hour after the one-hour shift backwards is encountered, the data is plotted as if it all occurred at the instant of the time change. Then when the hour's data has passed, plotting resumes normally and the data is plotted to the right of the time shift.

Note that in any case data is recorded to memory as would be expected, with a one hour time gap or a repeated hour when a daylight saving time shift occurs. The effects of the automatic daylight saving time shifts should cause minimal inconvenience, as they occur early Sunday morning. To prevent confusion and time ambiguity problems, avoid running environment-sensitive operations during the daylight saving time shift. Also consider temporarily suspending data recording for days on which daylight saving time shifts occur. But if you do this, be sure to resume data recording when you need it!

The A D buttons are used to select the menu parameter. The B C buttons are used to change the parameters. Press the E button to save the new setting. Press the F button to cancel any changes and exit to the menu.

Comm Setting

The COMM SETTING function is used to setup the communication parameters for the communication ports. Communications ports are used for communicating with a computer, printer, or other equipment. The thermo-hygrometer includes a serial (RS-232) port and IR port. To edit the settings for a specific port it must first be selected. The selections are SERIAL, IR, and ERRORS.

The ERRORS setting allows the user to view any error messages stored in the error queue. Once an error has been viewed, it is removed from the error queue.

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