DTLH Ultra - Low Temperature and Humidity Smart Calibration Chamber

Introduction

    ​The DTLH smart temperature and humidity calibration chamber is a specialized calibration, validation, and verification device designed for the calibration of temperature and humidity digital meters, sensors, transmitters, inspection instruments, data loggers, storage devices, and other related instruments. The system utilizes high-precision temperature and humidity sensors combined with an industrial programmable controller, enabling automatic humidity regulation within the chamber. It offers high control precision and repeatability, making it ideal for scientific research and product testing.The DTLH smart temperature and humidity calibration chamber is a specialized calibration, validation, and verification device designed for the calibration of temperature and humidity digital meters, sensors, transmitters, inspection instruments, data loggers, storage devices, and other related instruments. The system utilizes high-precision temperature and humidity sensors combined with an industrial programmable controller, enabling automatic humidity regulation within the chamber. It offers high control precision and repeatability, making it ideal for scientific research and product testing. 

Enforcement of verification regulations

Highlights

Advanced Technology

• Humidity Control: Split-Flow Method is used for humidity generation, significantly reducing stabilization time compared to dual-temperature methods and improving calibration efficiency.
• Temperature Control: liquid-bath-and-isothermal-plate heating technology is adopted, ensuring stable thermal radiation and uniform temperature distribution.
• Optimized Air Circulation: Features a unique internal air circulation system, eliminating dead zones and ensuring consistent airflow. Variable frequency technology allows for precise fan speed control, maintaining temperature uniformity at low speeds.

Smart Functionality

• IoT-Enabled Remote Control: Metrology technology is integrated with IoT, allowing Wi-Fi remote control for easier operation.
• High-Definition Touchscreen: Multi-touch capacitive display, enhancing user experience.
• One-Touch Start: Fully automatic operation reduces training time for metrology personnel.
• Scheduled Operation: Supports timed startup and shutdown, enabling remote operation and improving efficiency.

Reliable Quality

• Corrosion & Rust Resistant: The outer shell is phosphated, passivated, and coated with an anti-corrosion finish, resistant to rust and salt spray.
• Premium Internal Components: Inner chamber is constructed from SUS304 stainless steel.
• High-precision sensors: high precision platinum resistance temperature sensors and humidity sensors are equipped for precise control.
• Customizable Dual-Aperture Transparent Internal Doors: A high-transparency vacuum glass door is built-in, with two size-adjustable apertures for easy observation, readings, and manipulation.

Upgrade to Fully Automatic and Unattended Calibration

• An upgrade with smart imaging system, dew point meters, industrial cameras, robotic imaging systems, and database management software enables fully automatic temperature and humidity calibration. This system automates data recording and report generation, reducing manual labor and increasing efficiency.

Key Features

Smart Large Touchscreen

• Models feature high-definition capacitive touchscreens with clearer display and multi-touch support, and are designed for intuitive smartphone-like user experience.

Mobile App Remote Control

• Users operate smartphone/tablet App to remotely set temperature and humidity, start/stop the device, and monitor real-time status and fluctuations.

Programmable Calibration

• Multi-stage programming function allows users to predefine five calibration points as per metrology standards. The system executes the calibration sequentially with one-click activation, eliminating the need for manual input.

Rate of Change Indicator

• Temperature and humidity variation rates are displayed with customizable measurement intervals.

Real-Time Status Monitoring

• Real-time stability is calculated and displayed. The stability status, USB drive connection, and Wi-Fi connection status are displayed.

Graphical Data Visualization

• The system supports real-time temperature and humidity curves display, touchscreen zoom & pan functionality, and one-click screenshot and USB export.

Data Logging & Export

• Data can be automatic saved in Excel format and exported to a USB drive with one-click.

Scheduled Startup

• The system supports pre-programmed startup, allowing the system to reach operational conditions before work hours for immediate use.

Multi-Point Calibration

• The system enables multi-point calibration for temperature and humidity sensors, ensuring minimal deviation from reference standards through segmented correction.

Segmented PID Control

• The system implements multi-segment PID regulation, ensuring fast, stable adjustments with zero overshoot. The system can increase humidity from 40% RH to 60% RH within 15 minutes.

Fan Speed Control

• The main internal circulation fan features variable frequency speed regulation, allowing adjustable airflow via the touchscreen interface.

Multiple Safety Protections

• Includes overheat protection, low liquid level alarm, water tank refill alerts, compressor overheat warning & startup protection.

Communication Expansion

• Equipped with Ethernet, Wi-Fi, USB, and RS-232 ports, enabling PC connectivity for data acquisition and system configuration.

Technical Parameters

Etalon selection table

Name of product	Model No.	Dew point range	Temp. range	Resolution	Accuracy
Precision Dew Point Meter	Optidew401	-25~90℃	-40~90℃	0.01℃	Temp:±0.1℃；Dew point：±0.15℃
	DT-ACG200G	-30~90℃	-50~180℃	0.01℃	Temp:±0.1℃；Dew point：±0.15℃
Precision digital thermometer	DTSW-LcG	/	-30~150℃	0.001℃	±0.05℃

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