114 Instruments Model 211 Temperature Monitor Model 211 Temperature Monitor Features Operates down to 1.2 K with appropriate sensor One sensor input Supports diode and RTD sensors 0 V to 10 V or 4 mA to 20 mA output Large 5-digit LED display RS-232C serial interface and alarm relays Product Description The Lake Shore single-channel Model 211 temperature monitor provides the accuracy, resolution, and interface features of a benchtop temperature monitor in an easy to use, easily integrated, compact instrument. With appropriate sensors, the Model 211 measures temperature from 1.4 K to 800 K including temperatures in high vacuum and magnetic fields. Alarms, relays, user-configurable analog voltage or current output, and a serial interface are standard features on the Model 211. It is a good choice for liquefied gas storage and monitoring, cryopump control, cryo‑cooler, and materials science applications, and for applications that require greater accuracy than thermocouples allow. www.lakeshore.com Lake Shore Cryotronics, Inc. (614) 891-2244 Sensor Input Reading Capability The Model 211 temperature monitor supports diode temperature sensors and resistance temperature detectors (RTDs). The Model 211 can be configured for the type of sensor in use from the instrument front panel. Ensuring high accuracy and 5‑digit measurement resolution are 4‑lead differential measurement and 24‑bit analog‑to‑ digital conversion. The Model 211 converts voltage or resistance to temperature units based on temperature response curve data for the sensor in use. Standard temperature response curves for silicon diodes and platinum RTDs are included in instrument firmware. The Model 211 also provides non-volatile memory for one 200-point temperature response curve, which can be entered via the serial interface. fax: (614) 818-1600 e-mail: [email protected]

Model 211 Temperature Monitor Interface With an RS-232C serial interface and other interface features, the Model 211 is valuable as a stand-alone monitor and is easily integrated into other systems. Setup and every instrument function can be performed via serial interface or the front panel of the Model 211. Temperature data can be read up to seven times per second over computer interface; the display is updated twice each second. High and low alarms can be used in latching mode for error limit detection and in non-latching mode in conjunction with relays to perform simple on-off control functions....

116 Instruments Model 211 Temperature Monitor Typical Sensor Performance – see Appendix F for sample calculations of typical sensor performance Example Lake Shore sensor Temp Nominal resistance/ voltage Typical sensor sensitivity6 Silicon Diode DT-670-SD with 1.4H calibration Silicon Diode DT-470-SD-13 with 1.4H calibration GaAlAs Diode TG-120-SD with 1.4H calibration 100 Ω Platinum RTD 500 Ω Full Scale PT-103 with 1.4J calibration 1.4 K 77 K 300 K 500 K 1.4 K 77 K 300 K 475 K 1.4 K 77 K 300 K 475 K 30 K 77 K 300 K 500 K 4.2 K 77 K 300 K 420 K 1.2 K 1.4 K 4.2 K 100 K 4K 4.2 K 10 K 100 K 4.2 K...

Model 211 Temperature Monitor Front Panel Instruments 117 Power Supply (109-132) Display 5-digit LED Number of reading displays 1 Display units K, °C, °F, V, and Ω Reading source Temperature and sensor units Display update rate 2 rdg/s Temp display resolution 0.001° from 0° to 99.999°, 0.01° from 100° to 999.99°, 0.1° above 1000° Sensor units display resolution Sensor dependent to 5 digits Display annunciators K, °C, °F, and V/Ω Keypad 4 full travel keys, numeric and specific functions Front panel features Display brightness control, keypad lock-out Power requirements Output Size Weight 100 –...