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Deadweight Tester
 LDW 1000
Accuracy ±0.025% of measured value |
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Deadweight Tester
Type
LDW 1000
Pressure Balance
Primary Standard for Pressure
Datasheet
Operating Manual
Table of mass loads:
see Operating Manual |
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- Ranges from 0.2 bar to 1000 bar,
hydraulic operated
2.9 psi to 15000 psi
- Accuracy (total uncertainty of measurement)
±0.025% of measured value
- Self-sustaining complete system, also suitable for
on-site measurements / calibrations
- Options: DKD Certificate of Calibration, Intelligent
Calibration Module
IKM for easy
Transmitter calibration and automatic calculated corrections
Deadweight Tester (Pressure Balances)
are the most accurate instruments for the calibration of electronic or
mechanical pressure measuring instruments. The direct measurement of
pressure, according to its definition as a quotient of force and area, and
the use of high-quality materials result in small uncertainties of
measurement and an excellent long-term stability of five years. For these
reasons, deadweight testers have already been used in calibration
laboratories of industry, national institutes and research labs for many
years.
Due to the integrated pressure generation and the purely
mechanical measurement principle, the
LDW 1000 deadweight testers
are ideally suited for on-site use as well as service and maintenance
purposes.
The high-quality sensitive
piston/cylinder-units are well protected in a special housing. The core of the
LDW 1000 is a piston/cylinder
system of tungsten carbide. Besides this high-quality material, which
primarily stands out for its small temperature coefficient, the
workmanship of the system is a measure of the final accuracy of the
pressure balance. Several refinement processes ensure a high-quality and
even surface with small graps of only a few micrometer. In order to generate the individual test
points, the piston/cylinder system is weighted with mass-loads, which are
also calibrated and specially adapted to the respective application.
The
pressure is set via an integrated spindle pump. For fine adjustment an
adjustable volume the system is equipped with a volume variator valve. The weight applied is
proportional to the desired pressure and provided by using optimally
graduated weights. As soon as the measuring system reaches quilibrium, there
is a balance of forces between pressure and wheel weights. Due to the
excellent quality of the system this pressure remains stable over several
minutes, so that for instance adjustments of your device under test can be
carried out without any problems.
With this optional
addition to the system all critical ambient parameters are registered and
automatically corrected. Furthermore, a calibrator function for pressure
transmitters is integrated, so that a voltage can be supplied to the sensor
and the sensors signals can be measured without any problem. More optional Accessories
- Set of trim-masses for generating intermediate values
(weights 1 mg to 50 g)
- Oxytester (Purifier) for measuring instruments where
the filling medium should not come into contact with the deadweight
tester
- Dirt trap for test objects that are very dirty in order
to avoid the penetration of dirt particles into the deadweight tester
- Set of adapters in a tool case with 5 most commonly
used threaded adapters and a spanner (flats 32 and flats 14)
- Cleaning Kit "CPB5000-HY-RS" for hydraulic pistons
The mass set is supplied without wooden case. The
masses can be placed on the deadweight tester's base plate (see
image on the top of this page). At range 1000 bar / 15000 psi a mass
set extension (additional masses) are supplied in a wooden case.
Included in Standard Supply
- Basement and spirit level, adjustable feet.
- Spindle pump and volume adjustment valve
- Clamp for specimens
- One piston/cylinder system
- Set of stainless steel weights
Technical Data:
Measuring
Range bar |
Measuring
Range psi |
| 0.2 ... 60 |
2.9 ... 1,000 |
| 1 ... 250 |
14.5 ... 5,000 |
| 2 ... 600 |
29 ... 10,000 |
| 2 ... 1000 |
29 ... 15,000 |
Accuracy (uncertainty):
±0.025% of measured value (%RD). The accuracy is charachterised by the deviation
span, which is the sum of the systematic error and the uncertainties of
measurement. Longterm stability is not taken into account. Please note that
corrections might be required if the instrument is used without the optional
Intelligent Calibration Module - see operating manual.
| Recommended accessory:
Hand Suction Pump HAP 02
Datasheet
for suction of fluids, e.g. oil, water, break fluid, etc.
Perfect for the suction of the operation fluid of deadweight
tester (e.g. before transport etc.). |
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Other Deadweight Tester models:
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CPB5000:
Deadweight Tester Accuracy up to ±0.008% of measure value
Pneumatic and Hydraulic models
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CPB5000-HP:
High Pressure
Deadweight tester, up to 4000 bar / 60000 psi
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CPB5000-DP:
Differential Pressure Deadweight Tester
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