This instrument complies with the GB/T6538 standard for the determination of apparent viscosity of engine oils (cold start simulator method) and the ASTM D5293 test method; it is suitable for measuring the apparent viscosity of engine oils with a viscosity ranging from 1500 to 27000 mPa•s (the viscosity range of national standard automatic instruments is 2800 to 18000 mPa•s) under the conditions of a temperature range of -5 to -35℃, a shear stress of approximately 50000 to 100000 Pa, and a shear rate of 10⁵ to 10⁴ S⁻¹. The instrument consists of a bath temperature automatic control system, a stator measurement unit, a refrigeration system, a motor speed measurement system, and a host computer system, etc. The instrument realizes automation of operation, control, calculation, and display through multi-threaded operation control of the whole machine.

Main Features：

1. Color LCD touch screen with a full Chinese operation interface. Various parameters and working statuses are displayed intuitively.

2. Adopts the principle of fuzzy temperature control with high temperature control accuracy, and uses the curve fitting method for the automatic calculation of the apparent viscosity of engine oil.

3. The external structure of the instrument is split-type, avoiding the impact of vibration generated by the compressor during operation on the rotor and test results.

4. The control system is equipped with an automatic speed correction system, an automatic viscosity correction system, and an automatic function curve correction system.

5. The instrument features automatic temperature rise, automatic timing, automatic calculation, automatic constant temperature, automatic result saving, and automatic report printing.

6. Uses an imported motor for driving, and the imported tachometer has high precision and strong stability.

Main technical indicators：

Display mode: Color LCD touch screen

Measurement range: 1200～27000 mPa·s

Temperature measurement range: -50～100℃

Temperature measurement accuracy: ±0.1℃

Stator cold bath experiment accuracy: ±0.01℃

Refrigeration range: -50℃～room temperature

Temperature control accuracy: ±0.05℃

Ambient temperature: -40～30℃

Power supply: AC 220V±10% 50Hz±10%

Total machine power: ≤2KW

Heating power: ≤800W