Gaussmeter

Description

The Model 475 combines hardware and firmware elements to create advanced features that facilitate automation and materials analysis.

A built-in PI control algorithm turns the Model 475 into an essential building block for magnetic field control in electromagnet systems.
It, along with a voltage-programmable magnet power supply, is all that is needed to control stable magnetic fields in an electromagnet at the user- specified setpoint. One of the built-in analog voltage outputs drives the program input of the power supply for either bipolar or unipolar operation. See page 60 for more information.

The IEEE-488 interface can be set to send readings in binary format rather than the more common ASCII format. This reduces interface overhead, enabling real-time reading rates up
to 100 new readings per second. Temperature compensation is not available at the highest interface rate.

Internal memory provides storage
for 1024 field readings in a data buffer. The buffer can be filled at
high speed, up to 1000 readings per second, which is as much as ten times faster than the computer interface. Stored readings can then be retrieved over interface at slower speed and processed offline. A trigger input can be used to initiate the data log sequence. Slower sample rates can be programmed if desired.

A TTL-level hardware trigger into the instrument can be used to initiate the data log sequence. A TTL-level hardware trigger out indicates when the instrument completes a reading, and can be used to synchronize other instruments in the system. An IEEE- 488 software-based trigger can be used like the hardware trigger in.

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