The PR381/383 series temperature and humidity standard chambers are high-performance temperature and humidity generators, suitable for calibrating various types of digital and mechanical thermohygrometers. Equipped with Panran’s latest developed temperature and humidity controller, these series products not only expand the operating range of temperature and humidity but also achieve significant improvements in key technical parameters such as humidity control speed and stability.
I. Overview
The PR381/383 series temperature and humidity standard chambers are high-performance temperature and humidity generators, suitable for calibrating various types of digital and mechanical thermohygrometers. Equipped with Panran’s latest developed temperature and humidity controller, these series products not only expand the operating range of temperature and humidity but also achieve significant improvements in key technical parameters such as humidity control speed and stability.
1.1 Product Features
Humidity can be Controlled Over Wide Temperature Area
The temperature control range covers -50°C to 85°C. Within the temperature range of 20°C to 30°C, humidity control from 10%RH to 95%RH can be achieved. Within the temperature range of 5°C to 50°C, humidity control from 30%RH to 80%RH can be achieved.
Excellent Humidity Control Performance
The application of the new temperature and humidity control technology brings not only a significant expansion of the operating range of temperature and humidity but also a substantial improvement in key humidity control parameters, with humidity fluctuation better than ±0.3%RH per 30 minutes.
Dedicated Temperature and Humidity Controller
The new generation Panran PR2612 main controller features a specially designed decoupling algorithm for temperature and humidity sources, which automatically controls physical parameters such as heating, cooling, humidification, dehumidification, and air speed based on the set temperature and humidity values as well as the ambient temperature and humidity.
Powerful Environmental Adaptability
It adopts a closed-loop circulation structure, is insensitive to ambient temperature and humidity factors, and features strong tolerance, allowing it to operate for extended periods in a normal temperature environment of 10°C to 28°C.
Rich Human-machine Interaction Functions
It features a 7-inch color touchscreen that displays a wealth of process control parameters and control curves, and includes auxiliary functions such as one-key start, alarm settings, SV preset, and timed start/stop.
Practical structure and reasonable layout (PR383)
The equipment features innovative designs such as three-sided enlarged windows and foldable trays, which enhance visibility and operability, thereby making temperature and humidity calibration work more convenient, efficient, and labor-saving.
Support PANRAN Smart Metrology APP
With the optional WiFi module, the Panran Smart Metrology APP enables remote operation of the temperature and humidity standard chamber. The remote operation includes viewing or modifying various real-time parameters, start/stop functions, and more.
Optional Automatic Reading Device
An optional automatic reading module is supported. When combined with dedicated host computer software, it performs high-precision image recognition and automatic interpretation on both digital and mechanical instruments, enabling unmanned data acquisition and recording during the calibration process.
II. Models and Technical Parameters
2.1. Basic Technical Parameters
Item/Model | PR381A | PR383A | PR383B | |
External Dimensions | 178cm×105cm×70cm | 190cm×133cm×100cm | 190cm×133cm×100cm | |
Working Cavity Dimensions | 50cm×60cm×50cm | 77cm×80cm×77cm | 77cm×80cm×77cm | |
Total area of observation windows | 0.44m2 | 1.1m2 | 1.1m2 | |
Effective Volume | 150L | 400L | 400L | |
Weight | 350kg | 550kg | 450kg | |
Rated Power | 3kW | 5kW | 3kW | |
Power Supply | 220V AC, 50Hz | 380V AC, 50Hz | 220V AC, 50Hz | |
Operating Environment | 10～28℃, ≤75%RH | |||
Note: The dimensions of the working cavity and the overall dimensions are given as height × depth × width. The overall dimensions do not include the tray. | ||||
2.2 Temperature and Humidity Control Parameters
Item/Model | PR381A | PR383A | PR383B |
Temperature Control Range | -20℃～65℃ | -50℃～85℃[Note 4] | -20℃～65℃ |
Humidity Control Range | 10～95%RH@(20℃～30℃) | 10～95%RH@(20℃～30℃) | 10～95%RH@(20℃～30℃) |
30～80%RH@(5℃～50℃) | 30～80%RH@(5℃～50℃) | 30～80%RH@(5℃～50℃) | |
Auxiliary Cooling | ● | ● | ● |
Temperature Resolution | 0.01℃ | ||
Temperature Uniformity | ≤0.05℃ @ 20℃ (Note 3) ≤0.15℃ @ (15～30℃) ≤0.3℃ @ other temperature ranges | ||
Temperature Stability | ≤±0.1℃/30minutes | ||
Rate of Temperature Change | ≤0.02℃/minute | ||
Temperature Accuracy | ±0.1℃ | ||
Humidity Resolution | 0.01%RH | ||
Humidity Uniformity | ≤0.8%RH | ||
Humidity Stability | ≤±0.3%RH/30minutes | ||
Rate of Humidity Change | ≤0.3%RH/minute | ||
Humidity Accuracy | ±1.0%RH @ (15～30℃) | ||
±1.5%RH @ other temperature ranges | |||
Temperature Adjustment Time | 20℃ to -20℃ 60minutes 20℃ to 0℃ 30minutes 20℃ to 65℃ 40minutes | 20℃ to -50℃ 110minutes 20℃ to -20℃ 30minutes 20℃ to 85℃ 30minutes | 20℃ to -20℃ 60minutes 20℃ to 0℃ 30minutes 20℃ to 65℃ 40minutes |
Humidity Adjustment Time | (20℃ 20%RH) to (20℃ 80%RH) 8minutes (20℃ 80%RH) to (20℃ 20%RH) 10minutes | ||
Note 1: The auxiliary cooling circuit adopts air-cooling method. Note 3: When the set temperature is 20 °C, the central area of the working cavity within 100 mm × 100 mm × 100 mm meets the requirements of the JJF1171-2024 Calibration Specification for Temperature and Humidity Itinerant Detecting Instruments. Note 4: A customizable temperature range of –50 °C to 180 °C is available. | |||
Changsha Panran Technology Co., Ltd.