Fluke PM6681R, PM6685R manual Mathematics, Statistics, Limit Monitoring, Calculate Subsystem

Using the Subsystems

Calculate Subsystem

The calculate subsystem processes the measuring results. Here you can recalcu- late the result using mathematics, make statistics (not PM6685) and set upper and lower limits for the measuing result that the counter itself monitors and alerts you when the limits are exceeded.

￿Mathematics

The mathematic functions are the same as on the front panel.

￿Statistics

The PM6680B and PM6681 can calculate and display the MIN, MAX, MEAN and standard deviation of a given number of samples. The statistic functions are the same as on the front panel.

￿Limit Monitoring

Limit monitoring makes it is possible to get a service request when the measure- ment value falls below a lower limit or rises above an upper limit. Two status bits are defined to support limit monitor- ing. One is set when the results are greater than the UPPer limit, the other is set when the result is less than the LOWer limit. The bits are enabled using the standard *SRE command and :STAT:DREG0:ENAB. Using both these bits, it is possible to get a service request when a value passes out of a band ( UPPer is set at the upper band border and LOWer at the lower border) OR when a measurement value enters a band (LOWer set at the upper band border and UPPer set at the lower border).

Turning the limit monitoring calculations on/off will not influence the status regis- ter mask bits which determine whether or not a service request will be generated when a limit is reached. Note that the cal- culate subsystem is automatically enabled when limit monitoring is switched on. This means that other enabled calculate sub-blocks are indirectly switched on.

Calculate Subsystem 6-3