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Metrolab Digital Integrator, PDI 5025 
Tabs
 
The PDI 5025 is no longer in production see. See Discontinued Products.
The Metrolab PDI 5025 (IEEE-488 & RS-232) and PDI 5035 (VME) Precision Digital Integrators are particularly suitable for precision magnetic field mapping in space or time by measurement of flux change induced voltages in moving coils or wires. A precision Flip-Coil Sensor enables measurement of very high static fields up to 50T. Characterization of permanent magnets can be achieved by rotating the magnets within a coil system and measuring the induced voltages. Errors from eddy currents in B-H or M-H hysteresis measurements on conducting magnetic samples are significantly reduced by operating at very low frequency.

The digital integration technique eliminates the errors obtained with analog integration at long integration times. It also enables an integration interval to be divided into sub-intervals with essentially no dead-time. Integration resolution is down to less than 0.1µV.sec, with time intervals as short as 1ms for the 5025 and 0.25ms for the 5035. Integration times may be defined by the internal clock, external time, or other trigger sources (such as from position encoders for field mapping.)
 
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