Omega CYD211 User Manual page 8

General Description (Continued)
The Model CYD211 Temperature Monitor supports diode temperature
sensors and resistance temperature detectors (RTDs). The Model CYD211
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 CYD211 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 CYD211 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 Ω.
With an RS-232C serial interface and other interface features, the Model
CYD211 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 CYD211. 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 Omega Sensors *
Diodes
Silicon Diodes
GaAlAs Diode
Positive Temperature Coefficient (PTC) RTDs
100 Ω Platinum RTD
100 Ω Platinum RTD
Rhodium-Iron RTD
Negative Temperature Coefficient (NTC)
Germanium RTD
Germanium RTD
Carbon-Glass™ RTD
Cernox™ RTD
Cernox™ RTD
High-Temperature Cernox™ RTD
Rox™ Ruthenium Oxide RTD
Rox™ Ruthenium Oxide RTD
* Sensors sold separately.
†
Single excitation current may limit the low temperature range of NTC resistors.
1-2
Omega Model CYD211 User's Manual
Model
DT-670
TG-120
PT-100, 250 Ω full scale
PT-100, 500 Ω full scale
RF-800-4
†
RTDs
GR-200A-1000
GR-200A-250
CGR-1-500
CX-1050 AA or SD
CX-1030 AA or SD
CX-1030-SD-HT
RX-102A
RX-202A
Useful Range
1.4 – 500 K
1.4 – 475 K
30 – 675 K
30 – 800 K
1.4 – 400 K
2 – 100 K
1.2 – 40 K
3 – 325 K
3.5 – 325 K
2 – 325 K
2 – 420 K
2 – 40 K
3 – 40 K
Introduction