User manual for the Hengping NDJ-5S digital rotational viscometer, covering specifications, installation, operation, and safety.
The NDJ-5S digital rotational viscometer, developed with a micro‑processor, measures liquid viscosity by detecting torque on a rotating rotor. It offers high accuracy, stable display, and easy operation, suitable for oils, paints, foods, medicines, adhesives, and cosmetics.
The manual provides technical specifications, explains the working principle, and gives step‑by‑step instructions for installation, rotor selection, measurement procedures, RS‑232 communication, and maintenance precautions. This manual is written in Chinese.
| Measurement range | 10 mPa·s ~ 100 000 mPa·s |
|---|---|
| Rotor types | Four standard rotors (1‑4) |
| Rotor speeds | 6, 12, 30, 60 rpm (plus AUTO) |
| Measurement error | ±5 % (Newtonian liquids) |
| Dimensions (excluding base) | 105 mm × 120 mm × 160 mm |
| Net weight (excluding base) | 2.5 kg |
| Operating temperature | 5 °C ~ 35 °C |
| Power supply | 220 V ± 22 V, 50 Hz ± 0.5 Hz |
Select a rotor‑speed combination from the range table; for example, a viscosity of about 3000 mPa·s can be measured with rotor 2 at 6 rpm or rotor 3 at 30 rpm.
It means the sample’s viscosity is outside the instrument’s measurable range.
Yes, it has an RS‑232 port for two‑way data communication with a PC.