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Tektronix DM44
DMM top for 464/465/466/475
DM44 on top of a 475 scope

Compatible with 464

Produced from 1975 to (?)

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix DM44 is a 3½-digit digital multimeter module with manual range switching and LED readout that attaches to the top of the 464, 465, 466, and 475. It replaced the DM40 and DM43.

Key Specifications

DC V Range 200 mV to 1.2 kV in 5 decade steps
DC V Accuracy 0.1% of reading, ±1 Count
DC V Input Resistance 10 MΩ, Removable internal wire strap to increase input resistance to 1000 MΩ on 200 mV and 2 V Ranges
Max. Input ±1200 V (DC + peak AC) between positive input and Common input/chassis, ±500 V (DC + peak AC) to Chassis
Resistance Range 200 Ω to 20 MΩ in 6 decade steps
Resistance Accuracy 200 Ω to 2 MΩ, 0.25%, ±1 count; 20 MΩ, 0.30%, ±1 count
Temperature Range −55 °C to +150 °C (with P6430 Probe)


Documents Referencing DM44

Document Class Title Authors Year Links
Tekscope 1976 V8 N3.pdf Article Taking the Delay out of Delaying Sweep Measurements Bill Law 1976