ASTM D36 A3-2 Automatic computer asphalt softening point tester
Description
The ring and ball apparatus is mainly used to determine the softening point of asphalt, coal pitch, also it’s suitable for resin and grease. It’s kind of common asphalt testing instrument.
Main features
· Small bench type, microprocessor control, linear heating, automatic stirring, accurate test
· Flask made of high-temperature resistance glass
· Automatic stirring device, LCD indicates the time & temperature, two specimens test in same time
Specification:
| Main Technical Indicators |
| Parameter Names |
Details |
| Measuring Range |
-5-270 °C |
| Test Range |
5-180 °C |
| Heating Rate |
(5 ± 0.5 )°C / min |
| steel ball mass |
3.5 g ±0.05 g |
| Steel ball diameter |
9.53 mm |
| Steel Ball Sinking |
25.4 mm |
| Timing Range |
0-99 minutes 99 seconds |
| Temperature measuring accuracy |
0.1 °C |
| External Dimension |
340 *230*340mm |
| Power Supply Voltage |
220 v |
| Power |
1 KW |
| Ambient Temperature |
5 ~ 40 °C |
| Environment Humidity |
≤ 85 % |
| Test method |
Manual test or photoelectric automatic detection |
| heating method |
Heating speed is controlled by PID and fuzzy logic algorithm, magnetic stirring |
Practice
1. Placed in a beaker 800 ~ 1000ml of distilled water at low indoor temperatures can put less at higher indoor temperatures can put some more.
2. Add ice water or by heating, the temperature inside the beaker was adjusted to 5 ℃.
3. The magnetic stirrer was put to the bottom of the beaker in the middle position.
4. The two sample into the sample loop, and put two balls into the center of the specimen. The sample was placed in a beaker heated less than 15min.
5. The beaker was placed in the test device, plug in the power outlet.
6. Turn the power switch, press the "Start" button, by adjusting the speed button to make a stir speed to a suitable location. At the start of heating, stir speed can be faster, when the water temperature near the softening point, stop turning.
7. When the sample down to 25.4mm at the time the test is sound, indicating the end of the test.
8. Press the "Result" button on the temperature display reads average temperature.
Note: During the test, non-press "Reset" button.
