Oil Testing Instrument
LQHV-675 Automatic Kinematic Viscometer
Four-channel capillary viscometer for precise petroleum product analysis with touchscreen control
Technical Specifications
| display | Color LCD display + touch screen |
| Temperature control range | Room temperature ~150°C |
| Set temperature | 20°C, 40°C, 50°C, 80°C, 100°C, any value (higher than room temperature ~150°C) |
| Constant temperature accuracy | Plus or minus 0.02°C |
| Heating power | Number of test holes |
| Timing range | 0~999 seconds (according to the national standard, the flow time of each test sample must be higher than 200 seconds) |
| Timing accuracy | 0.1 s |
| Timing times | 1 to 4 times This parameter is optional |
| Storage capacity | 2000 test records |
| Printing mode | Panel mounted thermal printer |
| Power supply | AC220V±5% 50Hz±5% |
| power | 1600W |
| Service ambient temperature | 5°C ~ 35°C |
| Ambient humidity | 10%~80% |
Compliant with: GB/T 265-1988 | ASTM D445 | ISO 3104
Core Features
🌡️ Ultra-Precise Temp Control - ±0.02°C stability (20-100°C range)
🧪 High Throughput - 4 capillary viscometers tested simultaneously
📊 Smart Data Handling - Auto-rejects outliers per ASTM standards
🖨️ Instant Reporting - Built-in thermal printer with full test parameters
Testing Methodology
Capillary Viscometry Principle
Sample Loading - 10ml per viscometer (pre-filtered if needed)
Temperature Equilibrium - PID-controlled bath stabilization
Auto Measurement:
Optical sensors detect meniscus transit
4 repeat tests per capillary
ASTM D445 outlier rejection applied
Calculation:
ν = C × t
ν=kinematic viscosity (mm²/s), C=viscometer constant, t=flow time (s)
Multi-Test Workflow
Quick Screening
Set 1-3 repeats for fast approximate results (2 minutes/sample)
Standard Testing
4 repeats with auto-validation (5-7 minutes/sample)
Industry Applications
| Petroleum Product | Test Temperature | Typical Viscosity Range |
|---|---|---|
| Transformer Oil | 40°C | 8-12 mm²/s |
| Lubricating Oil | 100°C | 5-30 mm²/s |
| Diesel Fuel | 20°C | 2-6 mm²/s |
Maintenance Protocol
🧴 Daily - Clean capillaries with petroleum ether
⚖️ Weekly - Verify with NIST-traceable standards:
S3 (4.3 mm²/s at 40°C)
S20 (18.7 mm²/s at 40°C)
🔍 Monthly - Inspect optical sensors
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