MNR 700-VLP Minerva Low Pressure Deadweight Tester
Accurate and stable pressure measurement in a low measuring range
- Pressure range 0,005 to 25 kPa
- Accuracy 0,020% of reading, optional 0,015% or 0,010%
- Traceable to International Standards. Supplied with ISO/IEC 17025 accredited certificate
- Quick and simple to operate
- Gas operated
Operating principle
The operating principle of the MNR-700-VLP is based on the dynamic interaction between a flow of gas and a non-cylindrical piston. The diagram shows piston (1) coaxially located in the cylinder (2) transforming force (mg) into pneumatic pressure (P). The inclusion of the insert (3) and the two volumes (5 & 6) assures dynamic stability. The high accuracy of the MNR-700-VLP is provided by the two cascade regulators (4) which also isolate the output pressure from supply pressure fluctuations. When air is passing between the piston and cylinder a reactive feedback force is generated. This force does not exceed 0,0015 mg which is sufficient to self-centre the piston.
Technical Specifications
| Pressure range: | |
| MNR-700-VLP-25kPa | 0,02 – 25 kPa (gauge) or 0,005 – 25 kPa (differential) |
| Accuracy *Note1 |
Accuracy Reading 0,020% 0 .. 0,4 kPa : ± 0,1 Pa 0,4 .. 2 kPa : ± 0,030% of reading >2 kPa : ± 0,020% of reading Accuracy Reading 0,015% Accuracy Reading 0,010% **Note2 |
| Operating temperature | 15 to 35 °C |
| Operating atmospheric pressure | 85 -110 kPa abs |
| Operating humidity range | 30 to 80 % RH |
| External air supply | 300-400 kPa |
| Setting internal pressure regulator | 150 +/- 7,5 kPa |
| External air supply quality | Dry clean air, purity class 1-2-1 (ISO 8573-1) |
| Dimensions calibrator | 390 x 310 x 240 mm (l x w x h) |
| Dimensions case for piston, mass set & accesoiries | 390 x 310 x 147 mm (l x w x h) |
| Weight calibrator | 13,5 kg |
| Weight case for piston, mass set & accesoiries | 5,3 kg |
| Ordering code Accuracy Reading 0,020% | MNR-700-VLP-25kPa-0.020 |
| Ordering code Accuracy Reading 0,015% | MNR-700-VLP-25kPa-0.015 |
| Ordering code Accuracy Reading 0,010% | MNR-700-VLP-25kPa-0.010 |
*Note 1: reference parameters for defined specification:
- Temperature: 20 +/- 1 Deg.C.
- Atmospheric pressure: 101,325 +/- 3 kPa
- Relative Humidity: 50 +/- 20%
**Note 2: Consult Minerva for availability
