Introduction
Description (Continued)
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.
Four-lead differential measurement and 24-bit analog-to-digital conversion
ensure high accuracy and 5-digit measurement resolution. Temperature data
can be read up to seven times per second over computer interface; the
display is updated twice each second.
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. Measurements are available in temperature units K, °C, °F,
or sensor units V or .
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. 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. The
analog output can be configured for either 0 to 10 V or 4 to 20 mA output.
Table 1-1. Temperature Range of Typical Lake Shore Sensors*
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