Scanner Data Sheet - www.dataproof.com


	Low Thermal Scanner Models 160B and 320B



FEATURES Thermals typically < 20 or <15 nanovolts ^ą Front Panel or bus operation Dual output configuration 16 or 32 inputs Four terminal measurements Standard cell protection Simple operation ^{ą Depending on Model/Option}		USES Data Proof Low Thermal Scanners with extremely low thermal offsets are ideal for automating precision measurements to sub-ppm accuracy. This versatile dual scanner has two pairs of output lines which makes it suitable for a wide variety of uses. It can be used to make difference measurements for comparing voltage reference standards, as well as four-terminal measurements on resistance devices.

LOW THERMAL DESIGN Special care has been taken to minimize thermal offsets. The switches used are latching relays requiring only a short pulse to actuate, and thus no self-heating occurs. Two types of low thermal relays are used depending upon the model. Scanners contain customized sealed relays or PrintactŽ relays manufactured by Data Proof. Input leads are attached directly to relay boards reducing the number of contacts. Relays make connection by shorting together adjacent of contacts. Thus any thermal emf caused by a contact is canceled out by the nearly equal thermal emf generated by the other half of the pair. All relays are mounted in a heavy machined aluminum box to maintain thermal equilibrium in the switching area.		TWO MODELS AVAILABLE A choice of two scanners is available. The Model 160B has 16 input channels and the Model 320B has 32 channels. Four different input connections are also available. Four different input connections are also available. The Option 1, 3 and 4 have 6 foot cables to connect directly to the devices under test, and the Option 2 has low thermal binding posts. Rack mount versions are available. CONVENIENT OPERATION The relay circuits are activated either by front panel push buttons or by means of an IEEE-488 bus. A bus interface is built into the scanner as standard equipment and is easy to operate. A simple three character bus command sets the interface to remote, opens any previously closed relay, and then closes the specified relay.
Data Proof, 2562 Lafayette St., Santa Clara, CA 95050, phone 408 919-1799 fax 408 907-3710, www.dataproof.com