GT-YBF-3 Thermal Conductivity Tester Instructions

I. Overview

Thermal conductivity (thermal conductivity) is a physical quantity that reflects the thermal conductivity of a material. It is not only an important basis for evaluating materials, but also a design parameter when applying materials. In heaters, radiators, heat transfer piping design, house design, etc. This parameter is involved in practice. Because the thermal conductivity of the material changes not only with temperature and pressure, but also the impurity content and structural change of the material will significantly affect the thermal conductivity value. Therefore, the thermal conductivity of the material is commonly determined experimentally in scientific experiments and engineering techniques.

The method of measuring thermal conductivity can be broadly classified into two types, a steady state method and a dynamic method. The tester uses the steady state method to measure the thermal conductivity of different materials. The design idea is clear and simple, and the experimental method is typical and practical. Measuring the thermal conductivity of a substance is an important part of thermal experiments.

The tester consists of a heater, digital voltmeter, and chronograph (integrated design)

Second, the main technical indicators

1. Power supply: AC (220±10%) V, (50/60) Hz

2, digital voltmeter: 3 and a half display, range 0~20mV, measurement accuracy: 0.1% + 2 words

3, digital chronograph stopwatch: timing range: 0 ~ 9999.9s; minimum resolution of 0.1S; accuracy: 10-5

4, measuring temperature range: room temperature ~ 100 ° C

5, heating voltage: high-end: AC36V low-end: AC25V

6. Heat-dissipating copper plate: Radius: 65mm Thickness: 7mm Quality: 815g (The above parameters have been marked on each copper plate)

7, test medium: hard aluminum, silicone rubber, rubber wood, air, etc.

8, continuous working hours: > 8 hours

Third, the instrument panel diagram

Upper panel

Below board diagram

Fourth, the heating temperature setting:

= 1 \* GB3 1 Press the setting button (S) on the panel of the thermostat, and the digital tube of the set value (SV) display will start flashing.

= 2 \* GB3 2 According to the temperature required for the experiment, press the set button (S) to move to the desired position, and then set by the add button (â–²) and the minus button (â–¼). Good heating temperature required.

= 3 \* GB3 3 After setting the heating temperature, wait for 8 seconds and return to the normal display state.

Fifth, the connection of the instrument

Connection diagram

The thermocouple drawn from the copper plate is connected to the signal input end of the freezing point compensator, and is compensated by the freezing point. The signal output end of the freezing point compensator is connected to the signal input end of the thermal conductivity measuring instrument.

Sixth, instrument maintenance and maintenance

1. Wipe the heating plate and the heat sink surface before use. Wipe both sides of the sample and apply a small amount of silicone oil. To ensure good contact. Note that the sample cannot be tested continuously, especially silicone rubber, which must be lowered to room temperature for more than half an hour before the next test.

2. During the experiment, if the hot plate is removed, turn off the power first. When removing the hot cylinder, the hand should hold the fixed shaft to avoid burns.

3. When the digital voltmeter is unstable, check whether the thermocouple and the contact of each link are good.

4. When using the instrument, avoid places with strong magnetic field sources around it.

5. After the experiment is finished, turn off the power and keep the measurement samples. Do not scratch the ends of the sample to affect the accuracy of the experiment.

6. When the instrument is not used for a long time, please put on a plastic bag to prevent the humid air from coming into contact with the instrument for a long time. The air humidity in the room should be less than 80%.

7. When handling and placing the instrument, avoid strong vibration and impact.

8. When using it for a long time without using it, please use it after warming up for 30 minutes.

Seven, complete set

1. GT-YBF-3 type thermal conductivity tester 1 set

2, power cord 1

3, dedicated measurement thermocouple 2

4, freezing point compensation device 1

5, 4-core measuring line 2

6, feeler feel 1

7, test samples (hard aluminum, silicone rubber, rubber wood) 1 group

8, instruction manual 1 copy

9, product certification 1

Eight, after-sales service

The manufacturer shall repair or replace parts for the user without compensation for damage or failure to work properly due to poor product quality within 12 months from the date of shipment, subject to the user's custody and use rules.

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