CPT (RTD/Thermocouple/mV/Ohms Input)
8Pages

PC-Programmable Temperature Transmitter and Signal Isolator/Converter September 2004 Description The universal CPT PC-Programmable Temperature Transmitter and Signal Isolator/Converter accepts a direct signal input from a wide array of sensors and analog devices: • 23 RTD Types • 9 Thermocouple Types • Current and Voltage Signals • Resistance and Potentiometer Devices • Direct Millivolt Sources The 4-wire (line/mains-powered) CPT provides an isolated and linear current or voltage output (any range within 0-20mA or 0-10V) proportional to the input. The signal is ready for direct interface with readout instruments, recorders, PLC, DCS, or PCbased SCADA systems. The CPT features a metal, RFI resistant housing that snaps onto standard DIN-style rails. User-Selectable Failure Mode Upon input failure, the CPT’s analog output can be user-set for upscale or downscale drive, fail to last value, or fail to selected value. • 20-bit input resolution. Delivers industry-best digital accuracy for both sensor (RTD and thermocouple) and analog (current/voltage) inputs. Figure 1. Available CPT models deliver versatile and programmable input and output choices. Programmable Input RTD T/C ohms mV COMPUTER PROGRAMMABLE TRANSMITTER INPUT READY Programmable Output Analog Output Any Range Between 0-20mA or 0-10V Single Relay (optional) Features • Universal plant standard. There’s no need to stock dozens of different fixed range transmitters. • PC-programmable with Windows® software. From a single screen, you can choose, and then view to confirm, all of your application specific operating parameters from a PC. • Long-term stability. Provides up to 5 years between scheduled calibrations. • Combined alarm trip and transmitter. The alarm trip (-C) option reduces costs and installation time when both transmitter and alarm functions are needed at the same location. • Isolated and RFI/EMI protection. Delivers superior protection against the effects of ground loops and plant noise, and radio frequency and electromagnetic interference. Certifications* CE Conformant – EMC Directive 89/336/EEC EN 61326; Low Voltage Directive 73/23/EEC EN 61010 * ATEX, CSA and FM certifications are in submittal.

PC-Programmable Temperature Transmitter All operating parameters configure quickly and easily using our Intelligent PC Configuration Software. Programmable functions include: • Input type and measurement range (zero and full scale values) • Input and output trimming • Analog output range • Analog signal output damping (0-120 • On input failure, upscale or downscale drive, fail to last value, or fail to selected value • T/C reference junction compensation (on/off) • Standard and custom linearization curves • High or low alarm with trip point* • Failsafe or non-failsafe and normally open or...

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Trim to Specific Curve Segments The CPT can be trimmed with two data points within the selected zero and span measurement range. This allows a complete process range to be monitored, while placing measurement emphasis on a critical segment of the range. In the figure below, the ideal RTD curve is optimized between 20°C and 27°C to match the curve of the sensor used. This provides incredible precision over a limited portion of the span, while measuring the remainder of the span with outstanding accuracy. Figure 5. When...

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Specifications (HLPRG: Performance Input Accuracy: Current, ±0.01% of maximum span (±2 microamps); Voltage, ±0.01% of maximum span (±1mV) Output Accuracy: Current, ±0.01% of maximum span (±2 microamps); Voltage, ±0.01% of maximum span (±1mV) Overall Accuracy: The overall accuracy of the unit is the combined input and output (if any) accuracies. It includes the combined effects of linearity, hysteresis, repeatability, and adjustment resolution. It does not include ambient temperature effect Mimimum Span at Specified...

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Specifications (TPRG: Performance RTD, T/C, Ohm, mV and Pot Input Model) Performance (continued) Input Accuracy: See Table 4 Output Accuracy: Current, ±0.01% of maximum span (±2 microamps); Voltage, ±0.01% of maximum span (±1mV) Overall Accuracy: The overall accuracy of the unit is the combined input and output (if any) accuracies. It includes the combined effects of linearity, hysteresis, repeatability, and adjustment resolution. It does not include ambient temperature effect Mimimum Span at Specified Accuracy: See Table...

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Table 4. Accuracy with RTD, Thermocouple, Ohms, and Millivolt Inputs (Models with TPRG Input). Input Conformance Range Minimum Span Input Accuracy/Repeatability Maximum Range Direct Resistance

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Ordering Information Unit CPT PC-Programmable Temperature Transmitter and Signal Isolator/Converter Input HLPRG Programs to accept: Current: Any range between 0-50mA including: 0-20mA 4-20mA 10-50mA Voltage: Any range between 0-10Vdc including: 0-5Vdc 1-5Vdc 0-10Vdc TPRG Programs to accept (see Table 4 for details): RTD: 2-, 3-, and 4-wire; platinum, copper and nickel Thermocouple: J, K, E, T, R, S, N, C, B Ohms: 0-4000 ohms (potentiometer, 4000 ohms maximum) Millivolts: -50 to +1000mV Output 0-20MA Analog output...

PC-Programmable Temperature Transmitter and Signal Isolator/Converter Figure 7. Installation Dimensions 35mm (1.38 in) NOTE: While all CPT models (model with TPRG input shown) are dimensionally identical, the CPT that accepts temperature inputs features metal terminal blocks for enhanced cold junction compensation. COMPUTER PROGRAMMABLE TRANSMITTER INPUT READY Table 5. Terminal Designations Top Terminals (Left to Right) Input Type T1 Current Input (HLPRG) Voltage Input (HLPRG) Bottom Terminals (Left to Right) Power/Options B1 Standard Unit With Alarm Trip (-C) Option NOTES: 1. Terminal...