Universal Racks of Measuring Instruments

• Automated systems transport vector DC-, and AC- measurements, based on:
  - digital two-channel lock-in amplifiers Stanford Research SR830; and Signal Recovery 7220;
  - digital system multimeters Keithely-2000.
• Electrometric measurements based on:
  - Keithley 6517A (sorce-meter) и Keihtley 6514 electrometers.
• Temperature control and measurements using:
  - RuO- и Ge- resistance thermometers,
• -precision AC-bridges Picowatt AVS-47 with optically-isolated  interface IEEE-488.
  - Cu(Fe)-Cu thermocouples, digital multimeters Keithley-2000, and source-meters Keithley-2400,
• - Lakeshore 340 and Lakeshore 370 temperature controllers
• Magnetic field measurements and control:
  - using low-temperature GaAs- Hall probes and source/meters Keithley-2400.
  All measurement systems are connected via IEEE-488 bus with optically-isolated  interface to the control computers with NI-488.2 interface card.