Minimizing temperature fluctuations has long been an elusive goal for metrology laboratories. For instance, since temperature fluctuations can disturb the results of sensitive measurements, high accuracy AML laboratories require miniscule variation in temperature, including +/-0.10 and +/-0.01 degree Celsius temperature control. “When we started design, there were no controllers available that could support the goal of +/-0.01 degree,” said Ted Zsirai, HDR’s lead mechanical engineer for the project. To solve this challenge,
a full-sized facility was constructed to test the new controllers, which ultimately delivered control of up to +/-0.004 degree.