粘度指數過程分析儀 VI-4

VI-4
Features
- The only ASTM compliant viscosity index analyzer
- Kinematic viscosities directly and continuously measured
- Integral measurement of density
- Integral calculation of viscosity index
- Unparalleled temperature stability of ± 0.02 K
- No maintenance approach (no oil baths, no pumps)
- Hagenbach correction not necessary
- Network and fieldbus communication

Marking

ATEX:
II 2 G IIC T4 or T3 Gb
NEC 500: Class I, Div. 2, Groups B, C, D, T4 or T3
NEC 505: Class I, Zone 1, AEx IIB+H2 T4 or T3
CEC Sec. 18: Class I, Zone 1, Ex IIB+H2 T4 or T3
TR CU Certification available

Guidelines/Norms

ASTM D2270
ASTM D341

Ambient temperature

operation +5 up to +40 °C (+41 up to +104 °F)

Description

All fluids that fulfil the conditions of Newton’s friction law are referred to as Newtonian fluids. Their viscosity is a material constant, which is only dependent on pressure and temperature. The viscosity index is a widely used and accepted measure of the variation in kinematic viscosity due to changes in the temperature of a petroleum product between 40 and 100°C. A higher viscosity index indicates a smaller decrease in kinematic viscosity with increasing temperature of the product.

Application

The BARTEC BENKE Viscosity Index Process Analyzer VI-4 consists of two viscosity process analyzer units. One analyzer unit measures the kinematic viscosity at a temperature of 40°C and the other at a temperature of typically 100°C. These two values are used to calculate the VI according to ASTM D2270. Due to the outstanding performance and sample temperature stability of ± 0.02 K the VI-4 is the best choice for highly accurate viscosity index measurements e.g. lube oil production and fuel oil blending. This high level of accuracy results in cost reduction while improving product quality. The VI-4 is suitable to handle samples with a viscosity of up to 800 cSt at measurement temperatures of up to 100°C.

Special Features

Direct and continuous measurement of kinematic viscosity therefore direct comparison with laboratory results without any need for conversion
Integral measurement of the density therefore calculation and display of the dynamic viscosity
Minimized maintenance requirements due to temperature control and insulating system without oil bath/pumps
Compliance of the temperature stability (±0.02 K) as defined in standard ASTM D445
Necessity of Hagenbach correction is eliminated
Multi-stream capability
Automatic rinsing and draining option
Integrated failure diagnosis and self monitoring
No atmospheric drain required, backpressure at analyzer outlet permitted (depends on application)
Available communication interfaces:
- Modbus/RTU, Modbus/TCP (bidirectional)
- Remote access via Ethernet (VDSL or FOC is)
Validation report for quality assurance
Freely programmable digital and analog inputs

Documentation

Data Sheet - Viscosity Index Process Analyzer VI-4