The Doty Probe Controller for Spin Rate and Temperature Control

Doty's PC-based Probe Controller

providing both spin-rate and temperature control on Doty probes .

      Windows based multi-channel PID control software maintains spinning speeds and gas supply temperatures with high precision and stability.  The hardware consists of an Intel Celeron or AMD Duron based PC with interface cards to allow operation with the DSI fiber-optics spin rate monitoring system and the DSI VT heater power supply.  The computer system includes a flat-panel LCD display for low distortion in magnetic fields.  The controller software has been designed for ease of use and robust operation while providing simultaneous control of spin rate and bearing and drive gas temperature.

       The spin rate control sub-system features high accuracy, low drift control from 500 Hz to 30 kHz, auto-tuning of PID parameters, user adjustable spinning instability detection with automatic shutdown, user adjustable rotor acceleration, and manual operation with smooth change-over between automatic and manual valve control.  

       The VT sub-system features dual channel gas supply temperature control with auto-tuning of PID parameters and built in calibration software.

       The controller allows remote operation from another computer via RS-232 serial interface. The Probe Controller is usually supplied with both temperature and spin control, however, temperature control only or spin control only units can be ordered.

              Doty Probe Controller For Temperature Control Only

Temperature Controller Modules

      Plug-in modules are easily changed to provide control from -238°C to 750°C.  One sensor module is included with the controller.  When ordering, please specify the module to be included.  Additional modules can be ordered at any time.  

      Temperatures given are for the  Controller Modules. Please do not exceed your Probe Temperature Specifications!

Standard VT Sensor Module

        Provided for standard and extended-temperature MAS, as well as for standard high-resolution, and high-temperature-high-resolution. Accepts dual copper-constantan sample-gas thermocouple and 100-Ω RTD cold junction compensation inputs. Supports an additional copper-constantan thermo-couple for the electronics region.  Dual, independent, overheat--protected heater outputs. Accuracy:  ± 0.2°C from -180°C to +400°C with user calibration.

Extreme-High-Temp Module  

        Accepts chromel-alumel spinner air sensor with 100-Ω RTD cold junction sensor, electronics region and dewar region copper-constantan thermocouples. Single, overheat--protected heater output. Accuracy:  ± 0.5°C from -100°C to +750°C  with user calibration.   

Extreme-Low-Temp Module

        Accepts RTD sample gas sensor.  Single over-heat-protected heater output.  Accuracy:   ±0.5°C from 35 K to 700 K with user calibration.   

Doty Probe Controller For Spin Control Only

The Doty Probe Controller - Options

Specify 100 VAC, 120 VAC or 230 VAC when ordering.

*Doty probe Controllers can be ordered with a spin control unit, with a VT control unit, or with both.

For info on related controller accessories please browse our

Spin and Temp Accessories page

( Prices are USA prices. Foreign prices higher, plus taxes.)

  Please contact accessories@dotynmr.com with questions.