The only PCI Switch that enables your 6-1/2 or 7-1/2 digit DMM to deliver its full accuracy
	software configurable for 2-Wire, 4-Wire, 6-Wire Measurements
	very low signal noise and low voltage errors
	triggered scanning operations
	Comprehensive Self Tests
	Fully programmable with Visual Basic, C++, LabView, etc

The SM4042 and SM4022 are the only switching modules available in the PCI format designed for measurement accuracy. They allow you to maintain 7-1/2 digit measurement accuracy across your switching architecture. The SM4040 and SM4020 provide general purpose switcing for a lower price.