deadweight tester (DWT) is a calibration standard which uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston. Deadweight testers are so called primary standards which means that the pressure measured by a deadweight tester is defined through other quantities; length, mass and time. Typically deadweight testers are used in calibration laboratories to calibrate pressure transfer standards like electronic pressure measuring devices.
Purpose:
In 1980,Model : YS-6; YS-60; YS-600 Dead Weight Tester Pressure Tester were awarded the state silver medal. And in 1987, after re-examination , we still hold the state silver medal.
These testers are used in laboratory and measuring department for calibrating the precision pressure gauges or standard pressure gauges.
Specifications
Accuracy: 0.05% ; 0.02%, 0.015% , 0.01%
To order, specify the name ; model and accuracy.
|
Data
|
Unit
|
Pressure
|
|
0.6MPa
|
6MPa
|
60MPa
|
|
Upper limit
|
MPa
|
0.6
|
6
|
60
|
|
Downlimit
|
MPa
|
0,04
|
0.1
|
1
|
|
Piston Nominal Area
|
CM2
|
1
|
0.5
|
0.1
|
|
Carrier and Piston
|
Nomina1 Maas
|
kg
|
0.4
|
0.5
|
1
|
|
Pressure Developed
|
MPa
|
0.04
|
0.1
|
1
|
|
Weights
|
Nominal Mass
|
Kg
|
0,1; 0.5
|
0.5; 2.5
|
1;5
|
|
Pressure Developed
|
MPa
|
0.01; 0.05
|
0.1; 0.5
|
1;5
|
|
Quantity
|
pcs
|
6; 10
|
4; 11
|
4;11
|
|
Locking Nut
|
|
M20x1.5
|
M20x1.5
|
M20xl.5
|
|
Weight
|
Kg
|
20
|
26
|
26
|
|
Working Fluid
|
|
The Kine matic Viscosity of transformer oil and kerosene is 9 to 12 centistokes at 2O℃
|
The acidity of sebacic acid ester is not higher than 0.05mg kOH/g
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