The Model 6500 digital multimeter is a 50,000 count unit with a 50-segment bar-graph backlit display, dc accuracy of ±0.03%, and RS-232 interface with software and cable. Features include dBm measurement (40 to 1,200 references); ac and ac/dc True RMS; frequency, duty cycle, capacitance, and Min/Max/Relative modes. Model 6800 is an 80,000 count, dual-display meter with dc accuracy of ±0.005%; 3-V, 5-Hz to 5-kHz square-wave generator; duty-cycle measurement, and RPM capability. Additional features include frequency pulse width, duty cycle, hi/lo limit testing, dBm level (relative to 20 reference impedances); Min/Max/Avg, Peak Hold, and Relative modes; 10-hr timer, and RS-232 port, software, and cable. The product has a holster, test leads, temperature probe, and 9-V battery.

Protek Test & Measurement, 45 Smith St., Englewood, NJ 07631, (201) 227-1161,