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DTZ-01 Automatic Verification System for Thermocouple and Thermistor

作者: 发布日期:2017-01-05 访问次数:3617


Product Overview

Automatic Verification System for Thermocouple and Thermistor is automated verification equipment integrating the computer technology, electronic technology and automatic testing technology. The system is mainly used for the automatic verification / calibration of primary and secondary temperature instrument. In the system, the multichannel low-potential scanner, digital multimeter, thermocouple verification furnace, thermostatic bath and other devices are control by computer, which can realize the full automation of temperature control, data acquisition, data process, report generation, data storage and print in the process of verifying / calibrating the primary and secondary temperature instrument. The system functions and technical indexes fully conform to relevant national verification procedures and follow the ITS-90 international temperature scale.

Verification    / Calibration FunctionIndexing NumberGradeNotes
Standard    ThermocoupleS、R、BClass I, and    Class IIStandard thermocouple
Thermocouple for WorkingS、R、Short S、Short RGrade I and    IIPrecious metal thermocouple for working
BII 、III      Grade II and III
K、N、E、J、T、EA-2Grade I 、II、 III
Base metal thermocouple for working
Tungsten rhenium thermocouple for work
Industrial    ThermistorPt100、Pt10、Cu50、Pt-X、Cu-X、Cu100AA、 A、 B 、C Grade Two-wire、three-wire, and four-wire system
Temperature    Transmitter0-10mA、4-20mA、1-5V
With thermocouple and thermistor

Precious Metal Thermocouple Wire

S、RStandard  Grade (Class I and II), Grade I and II

Previous    metal thermocouple wire

BStandard    Grade (Class I and II), Grade I and II
Platinum Rhodium Thermocouple WireS、R、B

Base Metal Thermocouple WireK、N、E、J、TGrade I, II,    and IIIBase metal    thermocouple wire
Platinum Wire for Electrical Resistance Thermometer


Standard Grade (Class I and II), Grade A and BPlatinum wire for electrical resistance thermometer
Expansion ThermometersStandard mercury-in-glass thermometer, liquid-in-glass thermometers for working, bimetal thermometer, and pressure type thermometer
Secondary Temperature InstrumentsMoving-coil temperature indicator regulator, digital temperature indicating regulator, industrial process measurement recorder

 High-efficiency Working Mode

Mixing verification: The system can realize the mixing verification of base metal thermocouples with different indexing numbers in one same furnace.

Grouping verification: The low-temperature thermocouple and thermistor can be verified in group, wherein 10 groups (100 pieces) can be verified in one batch.

Mandatory verification: The system can perform the quick mandatory verification as user requires.

The special positioning device for verification furnace can make quick position for the furnace charging of thermocouple, to guarantee the accuracy of furnace charging position.

Advanced temperature control mode is adopt, so the constant temperature source has a high rate of temperature increase and good stabilization effect, which can reduce the verification time and improve the working efficiency.

The system can be upgraded to multi-furnace group-control system if the verification quantity is large.

 Complete Safety Mode

Both the imported intelligent instrument and software are used for double temperature control protection with the function of over-temperature protection and power down protection.

Self-inspection and line inspection: It can make humanized preventive protection for the open circuit, reverse connection and other protection on the standard and inspected wiring.

The software supports multimedia audible alarm and prompt, and allows customer to customize the alarm and prompt sound of various events.

 Standard cabinet is adopted, and separate treatment is used for the the motive power source and signal control part to avoid the problem of signal interference.

Flexible and Diversified Configuration

It supports multiple models of digital meter communication.

It is compatible with the constant temperature source from different manufacturers.

The verification temperature point of thermocouple can be the procedure default value, or be set as any point value as the customer requires, such as 660.5°C.

The reference end treatment can be compensated by ice point thermostat or automatically compensated by the temperature sensor for reference end. The temperature sensor for reference end uses Grade A Pt100 platinum resistor which has stable reading and high measurement accuracy, and is easy to be corrected. The correction value can be input into the software, to improve the measurement accuracy.  


Graphical Software Operation Platform

The software can be operated perfectly in the Windows series of operation system, and the system has the user interface in Chinese with simple operation.

Rich display interface: it displays the verification data and temperature control cure in real time, and can automatically track and display all state information of all verification furnaces, thermostatic baths, and standards, which is convenient for the measuring personnel to control the equipment operation status in real time.

Simulating verification: the whole verification process is simulated by software, which can be used for study and demonstration.

Both the software and hardware product have the fully proprietary intellectual property rights, so the upgrade service is guaranteed for providing all-around services for customers.

Modular Data Management Function 

It has strong data acquisition, data analysis and process, report management, data query, equipment self-inspection and other functional modules. After the verification is completed, all raw data, verification certificate will be automatically stored into the database, and user can query and print the raw record and report through the condition query function. And it comes with the memory function for directly calling the inspected information in next verification.

The system data backup function has two modes: manual backup and automatic backup, for easier metrological tracing.


Stable and Reliable Product Performance

The Company has passed the certification of ISO9002:2008 International Quality Management System and strictly executes it. Its products meet the national industrial standard from raw material selection, production and processing to the finished products, which meets the requirements of AMS 2750E High-temperature Measurement in the mean time of being superior to China's domestic specifications.

Software Secondary Development Function

Users can design the format of table and certificate by themselves according to requirements.

The existing software can be customized and modified according to user's requirements.Relevant interfaces are provided to realize the secondary development of software and meet users' own requirements.

Multi-channel low potential scanner

It adopts the fully sealed low-potential scanner switch driven by stepper motor, and its switch substrate uses large-area sliver coated material, which is dustproof, wear-resisting and anti-oxidative; the wiring terminal is in pure red cooper materials which are produced in one same batch. It guarantees the parasitic potential to be 0.2μV for long time.


It contains change-over switch in four-wire system which effectively eliminate the impact of parasitic potential in measurement circuit on the measurement result through its special forward and backward measurement switch function.

It adopts color touch screen, and is internally installed with user guide, so the customer can query the system instructions for use at any time without looking over the user manual, including the wiring method of thermocouple and thermistor detection, and other functions; it can display the real-time position and state of the standard and inspected channel, switch the position of standard and inspected channel; manual verification can be applied when being disconnected with the upper computer

Integrated Junction Board

The system junction board and three-wire resistance convertor are in integrated design, which is compatible with the wiring connection of thermocouple, thermistor in two-wire system, thermistor in three-wire system, and thermistor in four-wire system. It can automatically complete the measurement function switch between 2 internal leads contained and 1 internal lead contained during the verification of thermistor in three-wire system.

Professional Data Processing Capacity

The system meets the existing national procedures and specifications, and the data is computed and processed strictly in accordance with the procedures and specifications to ensure accurate and reliable verification result.

Uncertainty analysis software

The uncertainty analysis software is a software for analyzing the calculation uncertainty. It can calculate the uncertainty of the DTZ-01 thermocouple, the thermal resistance automatic verification system, or other thermocouple thermal resistance automatic verification system, and can export the results.

Free professional temperature scale conversion software

It can realize the conversion of temperature unit; the conversion of temperature value and potential value of working thermocouple (including WRe3 and WRe5), and can calculate differential thermoelectric potential; conversion of industrial thermal resistance temperature value and resistance value, and can calculate differential thermal resistance; Calculate the potential value of the standard even 300-1300 degrees Celsius according to the standard certificate and the conversion of the potential value and the temperature value within the range; according to the standard certificate value, the standard thermal resistance is obtained from the resistance value or the temperature value is obtained; the dry and wet bulb humidity Conversion; heat transfer coefficient conversion; heat transfer rate conversion; power unit, pressure unit, diffusion coefficient, length unit, area unit, surface tension, speed unit, force unit, dynamic viscosity, kinematic viscosity, energy unit conversion.

Technical Indexes

 Multichannel scanning of parasitic potential in switch: ≤0.2μV

 Difference value of inter-channel data acquisition: ≤0.5μV   1mΩ

Repeatability measurement:       ≤1.0μV       3mΩ

Thermostatic performance of thermocouple verification: Constant temperature ≤0.5℃/6min, and measurement ≤0.1℃/min

Thermostatic performance of thermostatic oil and water bath: Constant temperature ≤0.02℃/10min, and measurement ≤0.01℃/min

Compensation range of thermocouple reference end: 0℃-50℃, resolution: 0.01℃

This system executes following verification procedures:

No.Regulation (Specifications) CodeName of Procedure (Specifications)
1JJG75-1995Regulation for Verification of Standard Platinum-Rhodium 10 - Platinum Thermocouple
2JJG141-2013Regulation for Verification of Precious Metal Thermocouple for Working
3JJG351-1996Regulation for Verification of Base Metal Thermocouple for Working
4JJG668-1997Regulation for Verification of Platinum-Rhodium 10 - Platinum and Platinum-Rhodium 13 - Platinum Short-model Thermocouple for Working
5JJG368-2000Regulation for Verification of Copper — Nickel-Chromium Thermocouple for Working
6JJG229-2010Regulation for Verification of Platinum and Copper Industrial Thermistor
7JJF1262-2010Specifications for Calibration of Sheathed Thermocouple
8JJF1176-2007Specifications for Calibration of (0-1500°C) Tungsten-Rhenium Thermocouple
9JJF1098-2003Specifications for Calibration of Thermocouple and Thermistor Automatic Measurement System
10JJG130-2011Verification regulation of working glass liquid thermometerRegulation for Verification of Liquid-filled Thermometer for Working
11JJG161-2010Regulation for Verification of Standard Mercury-in-Glass Thermometer
12JJG310-2002Regulation for Verification of Pressure Type Thermometer
13JJG226-2001Regulation for Verification of Bimetal Thermometer
14JJF1184-2007Technical Specifications for Temperature Field Measurement of Thermocouple Verification Furnace
15JJF1030-2010Test Specifications for Technical Performance of Thermostatic Bath
16JJF1183-2007Calibration specification for temperature transmitter
17AMS2750ESpecifications for Aerospace Material, Pyrometry

>><< DTZ-02 automatic verification system for Thermocouple(Group Furnace) and Thermistor

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