22 July 2016 New cryogenic temperature monitor: PLT-HPT-32
Author Affiliations +
The PLT-HPT-32, a new cryogenic temperature monitor, has been developed by the Institute of Astrophysics of the Canary Islands (IAC) and an external engineering company (Sergio González Martín-Fernandez). The PLT-HPT-32 temperature monitor offers precision measurement in a wide range of cryogenic and higher-temperature applications with the ability to easily monitor up to 32 sensor channels. It provides better measurement performance in applications where researchers need to ensure accuracy and precision in their low cryogenic temperature monitoring.

The PLT-HPT-32 supports PTC RTDs such as platinum sensors, and diodes such as the Lake Shore DT-670 Series. Used with silicon diodes, it provides accurate measurements in cryo-cooler applications from 16 K to above room temperature. The resolution of the measurement is less than 0.1K. Measurements can be displayed in voltage units or Kelvin units. For it, two different tables can be used. One can be programmed by the user, and the other one corresponds to Lake Shore DT670 sensor that comes standard.

There are two modes of measuring, the instantaneous mode and averaged mode. In this moment, all channels must work in the same mode but in the near future it expected to be used in blocks of eight channels. The instantaneous mode takes three seconds to read all channels. The averaged mode takes one minute to average twenty samples in all channels. Alarm thresholds can be configured independently for each input. The alarm events, come from the first eight channels, can activate the unit’s relay outputs for hard-wired triggering of other systems or audible annunciators. Activate relays on high, low, or both alarms for any input.

For local monitoring, "Stand-Alone Mode", the front panel of the PLT-HPT-32 features a bright liquid crystal display with an LED backlight that shows up to 32 readings simultaneously. Plus, monitoring can be done over a network "Remote Control Mode". Using the Ethernet port on the PLT-HPT-32, you can keep an eye on temperatures, log measurement and configured remotely via a Networked local PC or even remotely over a TCP/IP Internet connection from anywhere.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Teodora Aleida Viera Curbelo, Teodora Aleida Viera Curbelo, Sergio Gonzáles Martín-Fernández, Sergio Gonzáles Martín-Fernández, R. Hoyland, R. Hoyland, A. Vega-Moreno, A. Vega-Moreno, Juan Cozar Castellano, Juan Cozar Castellano, M. F. Gómez Reñasco, M. F. Gómez Reñasco, M. Aguiar-González, M. Aguiar-González, Angeles Pérez de Taoro, Angeles Pérez de Taoro, V. Sánchez-de la Rosa, V. Sánchez-de la Rosa, J. A. Rubiño-Martín, J. A. Rubiño-Martín, R. Génova-Santos, R. Génova-Santos, "New cryogenic temperature monitor: PLT-HPT-32", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991263 (22 July 2016); doi: 10.1117/12.2232688; https://doi.org/10.1117/12.2232688

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