|
|
|
| Research of Constant Temperature and Velocity Water Bath for Calibration of Temperature Sensors’ Dynamic Response |
|
|
|
|
Abstract Dynamic response is a key performance of temperature sensors in important and safety occasions. The constant temperature and velocity water bath is the core equipment for the calibration of temperature sensors` dynamic response. Due to the slow heating rate in typical annular rotating water bath, a novel electrically heated annular rotating water bath was developed based on the precision sliding ring, and the temperature fluctuations and velocity fields of the novel bath were tested. The results show that the heating up time is shortened, the temperature fluctuation is significantly less than ±1.0% of the step temperature, the vertical velocity uniformity is significantly better than 10% of the novel bath. The time constants of a sheathed resistance thermometer and a sheathed thermocouple were measured by the existing jet rotating water bath and the novel bath. The deviations from the existing bath results are 4.1% and 7.5%, respectively. These meet the engineering requirement. The novel bath provides good constant temperature and velocity environmental conditions for the dynamic response calibration of temperature sensors.
|
|
Received: 05 February 2024
Published: 26 September 2024
|
|
|
|
|
|
|
2024, Vol. 45 
