Qingdao Haitongda 6-Speed rotational viscometers are direct-reading instruments which are available in six- speed designs for use on either 50 Hz or 60 Hz electrical power. The standard power source is 220 volts, but all models may be fitted with a transformer, making operation with 220/110 volts possible.
Qingdao Haitongda 6-Speed rotational viscometers are used in research and production. These viscometers are recommended for evaluating the rheological properties of fluids, Newtonian and non-Newtonian. The design includes a Rotor Sleeve, Bob, F1 or F0.2 Torsion Spring, and a stainless steel sample cup for testing according to American Petroleum Institute Recommended Practice for Field Testing Water Based Drilling Fluids, API RP 13B-1/ISO 10414-1 Specification.
Type Specification
| Model | Name | Configuration |
| ZNN-D6 | 6-Speed rotational viscometer | F1 Torsion spring measure component |
| ZNN-D6V | 6-Speed rotational viscometer | F1 Torsion spring measure component |
| ZNN-D6F | 6-Speed rotational viscometer | F0.2 Torsion spring measure component |
| ZNN-D6VF | 6-Speed rotational viscometer | F0.2 Torsion spring measure component |
Technical Specification
| No. | Technical Specification | Model |
| ZNN-D6 | ZNN-D6V | ZNN-D6F | ZNN-D6VF |
| 1 | Power supply | 220V±5% 50Hz | 110V±5% 50Hz/60Hz | 220V±5% 50Hz | 110V±5% 50Hz/60Hz |
| 2 | Rated power | 7.5W/15W |
| 3 | Motor speed | 750/1500 r/min |
| 4 | Speed range | 3、6、100、200、300、600r/min |
| 5 | Velocity gradient | 5、10、170、340、511、1022 S-1 |
| 6 | Measuring accuracy | 1~25 mPa·s±1 mPa.s（ Newtonian fluid ）
25 mPa·s above ±4%（ Newtonian fluid ） |
| 7 | Viscosity measuring range | Newtonian fluid ：
0~300mPa.s (F1 Measure component )
Non-Newtonian fluid ：
0~150 mPa.s (F1 Measure component )
Shear stress ：
0~153.3Pa (F1 Measure component ) | Newtonian fluid ：
0~60mPa.s (F0.2 Measure component )
Non-Newtonian fluid ：
0~30 mPa.s (F0.2 Measure component )
Shear stress ：
0~30.7Pa (F0.2 Measure component ) |
| 8 | Net weight / Gross weight | 9.28kg/9.76kg |
| 9 | Overall dimensions | 220×280×405mm |
| 10 | Packing size | 470×180×380mm |
