Yokogawa 는 1967년에 공정 자동화에 사용할 수 있는 온라인 밀도 분석계에 대한 사용자의 요청에 따라 VD6 진동형 액체밀도 분석계 모델을 개발하였습니다. 밀도는 기본 물리량이고 정확한 측정을 거의 모든 공정에서 중요하기 때문에 이것은 계측 분야에서 중요한 발전이었습니다. VD6 밀도 분석계는 매우 안정적이고 고감도 측정기로서 탁월한 평판을 얻고 있습니다.
새로운 DM8 진동형 액체 밀도 분석계는 VD6에서 얻은 경험을 바탕으로 한 매우 안정적인 다기능 측정기 입니다. 최신의 컴퓨터 기술을 활용하여 광범위한 센서 기술을 통합합니다. 이 변환기에는 센서 주파수 신호를 디스플레이용 밀도값으로 직접 변환하는 마이크로 프로세서가 포함되어 있습니다. 원터치 보정, 자가진단, 디지털출력 (RS-232C) 등 다양한 기능을 제공합니다.
DM8은 진동식 액체 밀도 분석계이며 변환기의 주파수 신호를 직접 농도값으로 변환하여 표시하는 마이크로프로세스가 내장되어 있으며 원터치 보정, 자가진단, 디지털출력과 같은 다양한 기능을 제공합니다.
DM8 액체 밀도 분석계는 일반적인 공정 액체의 밀도를 고감도 및 우수한 안정성으로 측정합니다. 측정 밀도 범위는 0 ~ 2.0 g/cm3이며, 유량과 점도에 영향을 받지 않습니다. 범용 센서 외에 위생 타입 및 방폭형 센서도 있습니다.
Details
- High sensitivity and stability.
- One touch calibration with a standard calibrating solution.
- Free setting of measuring range in the field.
- Failure alarm display and output.
- Outdoor installation of converter.
| Measurement object | Liquid density |
|---|---|
| Measurement principle | Vibration density measurement |
| Measurement range | Density :0.5 to 2.0 g/cm3 |
| Measuring liquid temperature | -10 to 100℃ |
| Measuring liquid pressure | 2 MPa G or less |
| Withstandable pressure | 4.9 MPa G |
| Output signal | Analog output:4 to 20 mA DC (load resistance 550 Ω or less), and 0 to 1 V DC (load resistance 250 kΩ or more), isolated output. Digital output: RS-232C |
| Output signal span | 0.05 to 0.5 g/cm3 settable |
| Reference temperature set range | 0 to 100℃ (in increments or decrements of 1℃) |
| Contact output on failure | One output |
| Settable range for temperature coefficient | 0 to 0.002 g/cm3/℃ |
| Calibration procedure | One-touch calibration by strong calibration liquid density (one-point calibration) |
| Ambient temperature | -10 to 55℃ |
| Case construction | Dust and rain proof construction |
| Power supply | 90 to 132 V AC or 180 to 264 V AC, 50/60 Hz |
| Weight | Approx. 7.5 kg (Converter), approx. 12.0 kg (Detector) |
Overall performance after combining the detector and converter.
| Linearity | ±0.5 % of span (when span is 0.2 g/cm3 or less) |
|---|---|
| Repeatability | 5 x 10-4 g/cm3 (for digital output) 1 % of span (for analog output) |
자료실
One of the critical control points in the brewing process is the monitoring of the progress of the fermentation stage. The DM8 Vibration Type Liquid Density Meter offers high sensitivity and stability, realizes precise control, reduces workload, and reduces instrument costs.
Caustic soda and hydrochloric acid, produced in electrolyzer plants, are fundamental materials used in varieties of industries; chemicals, pharmaceuticals, petrol-chemicals, pulp and papers, etc. Profit is the result of the effective production with minimized running / maintenance cost. Proper control of the process brings you stabilized quality of products with the vast operational profit.
Process liquid analyzers such as pH meters, conductivity meters, ORP meters, and density meters play an important role at electrolysis plants in the control of concentrations of various process solutions. This requires both precision and stability under harsh conditions that include highly corrosive substances, high temperatures, and many impurities.
Caustic soda is an important basic material in the chemical industry and is mainly produced by the electrolysis of soda. In the electrolysis process to make concentrated caustic soda, the DM8 Liquid Density Meter ensures high product quality through accurate measurement of liquid density.
In the food industry, the control of concentrations on the production line is critical to product quality, determining, among other things, how good the food tastes. One such procedure for doing this involves taking a sample from the production process and measuring its specific gravity (density) with a hydrometer.
Skim milk is what remains after cream is removed from raw milk. Cream is removed to bring the fat content of the skim milk as close as possible to the lower limit of a designated range. For this purpose, control of the fat content in the cream and the skim milk is essential. The fat content in the cream and the milk has a direct relationship to their density and is controlled by the measurement thereof.
Downloads
Brochures
- DM8 Vibration Type Liquid Density Meter (5.4 MB)
- Product Solution Catalog (5.3 MB)
Instruction Manuals
- DM8 Vibration Type Density Meter (2.3 MB)
General Specifications
Drawings
- DM8C Vibration Type Liquid Density Converter (230 KB)
- VD6D Vibration Type Liquid Density Detector (36 KB)
- VD6DF Frameproof Liquid Density Detector (33 KB)
- VD6DS Sanitary Use Liquid Density Detector (33 KB)
- DM8W Special Cable for Liquid Density Meter (31 KB)
- Sampling Unit for Liquid Density Meter VD6SM-###-PG#0-T1#0*B (46 KB)
- Sampling Unit for Liquid Density Meter (with Steam Trace Tube) VD6SM-###-PK#0-T1#0*B/ST (57 KB)
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