The Tektronix DM5120 is a programmable 6½-digit multimeter plug-in for the TM5000 system.
The DM5520 is a standalone version, i.e. a DM5120 in a dedicated mainframe, which however cannot be used outside the DM5520 frame.
|Resolution||±3,029,999 counts (6½ digits) in DC Volts and Ohms, 5½ digits otherwise in fast mode|
|Voltage ranges||300 mV to 300 V in decade steps, DC or AC|
|Input Impedance (DC Volts)||
|Input Impedance (AC Volts)||1 MΩ // 120 pF|
|Current ranges||300 μA to 3 A in decade steps, DC or AC|
|Resistance ranges||300 Ω to 300 MΩ in decade steps, 4-wire mode available in 300 Ω to 30 kΩ ranges|
The DM5120 shares its analog section design with the Keithley 196, minus the front/rear switch.
The instrument's internal voltage reference is based on the LM399.