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Purpose This document contains the specifications for PIPII cryomodule temperature sensors.
Scope This specification document includes parameters for the internal cryomodule sensors:
Temperature sensors
· PT103 Platinum RTD
· Cernox CX-1030-CU-HT,SD-HT
· Cernox CX-1030-CU-HT,CU-HT Definitions
| RTD |
| Resistance Temperature Detector |
References
| ED0002454 |
| PIPII Cryomodule Instrumentation List |
Responsibilities
| Person(s) or Areas Responsible |
| Define Responsibility |
Overview
PT103 Platinum RTDs.
| Specification |
| Value |
| Implication |
| Standard Curve |
| IEC 751 |
| Not individually calibrated |
| Recommended excitation |
| 1 mA |
| Temperature Range |
| 14K to 873K |
| Suitable for cryogenic operation |
| Thermal Response Time |
| 1.75 s at 77K |
| Reproducibility |
| ±5 mK at 77 K |
| Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 K to 77 K |
| Long-term stability |
| ±10 mK at 77 K |
| Long-term stability data is obtained by subjecting sensor to 200 thermal shocks from 305 K to 77 K |
| Typical Accuracy |
| At 30K ±10 mK At 77K ±12 mK |
At 305K ±23 mK
| Dimensions |
| 0.45” x 0.063” |
| Fits inside designated sensor mount |
| Material used |
| Platinum winding partially supported by a |
high temperature alumina powder inside a ceramic tube, platinum lead wires Non-Magnetic
| Radiation Stability |
| Δ75mK over full temperature range after 106 Rads exposure |
| Exceeds requirements (Δ250mK over full temperature range after 106 Rads exposure) |
. Cernox CX-1030-CU-HT,SD-HT RTDs The following specifications are for the Cernox CX-1030-CU-HT,SD-HT RTD sensors.
| Specification |
| Value |
| Implication |
| Type |
| Cernox CX-1030-CU-HT, Cernox CX-1030-SD-HT |
| CU Bobbin: Large thermal anchor |
SD Package: Small, convenient pkg.
| Recommended excitation |
| 20 μV (0.1 K to 0.5 K) |
63 μV (0.5 K to 1 K) 10 mV or less for T > 1.2 K
| Temperature Range |
| 0.1K to 420K |
| Suitable for liquid He temperatures |
| Thermal Response Time |
| 0.25 s at 77K (SD) |
| Calibration |
| Non-Standard |
| Individually calibrated |
| Dissipation at recommended excitation |
| Typical 10-5 W at 300 K, 10-7 W at 4.2 K, 10-13 W at 0.3 K |
| Reproducibility |
| ±3 mK at 4.2 K |
| Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 K to 4.2 K |
| Calibrated Accuracy | |
| 1.4 K |
| ±5 mK | |
400K ±65mK
| Long-term stability | |
| 1.4 K |
| ±3 mK | |
Long-term stability data is obtained by subjecting sensor to 200 thermal shocks from 305 K to 77 K
| Lead type |
| 2, gold-plated copper |
| Radiation Stability |
| ±10 mK at 1.4 K after 106 Rads exposure |
| Exceeds requirements (±250mK @ 1.4K after 106 Rads exposure) |
| EMI Susceptible |
| Yes |
| Leads should be shorted together when not in use to avoid damaging sensor |
Magnetic Field Dependence Data for CX RTD Ionizing Radiation Effects image3.emf image4.emf image1.emf image2.png
