Model 2700 features Model 2700 is a 6 1/2-digit high-performance multimeter/data acquisition system. It can v measure voltage (DC and AC), current (DC and AC), resistance (2- and 4-wire), temperature (thermocouple, thermistor, and 4-wire RTD), frequency and period, and test continuity. The Model 2700 has two slots that will accommodate Keithley Model 7700 series switching modules (Table 1-1). Each channel of a switching module that is closed or scanned is measured by the Model 2700, For scanning, each channel can have its own unique setup (i.e., function, range, digits, etc.). More information on the measurement capabilities of the Model 2700 is provided in - “DMM measurement capabilities,” page 3-2. A connection guide for the Model 7700 is provided in Appendix B, Specifications for the Model 2700 and 7700 switching module . are provided in Appendix A. Additional features of Model 2700 include: * Setup storage — Six instrument setups (four user, *RST defaults and factory defaults) can be saved and recalled. • Offset-compensated ohms — A two-measurement process for 4-wire ohms to cancel the effects of thermal EMFs. Available for the 1Q0Ω, 1kΩ and lOkΩ ranges. - Math — mX+b, percent, and reciprocal (1IX) calculations provide mathematical manipulation of readings. * Relative — Null offsets or establish baseline values. • Ratio and channel average — Ratio and average calculations for two switching module channels. • Buffer — Store up to 55,000 readings in the internal buffer. » Limits — Two sets of high and low reading limits to test devices. • Digital I/O port — Five digital limit test output lines to control external circuitry. The digital trigger link and hardware interlock input can also be accessed at this port. • Monitor — The Model 2700 can monitor a selected channel. A scan can be triggered to start when the Monitor detects a reached reading limit. • Remote interface — Model 2700 can be controlled using the IEEE-488 interface (GPIB) or the RS-232 interface.