Technical Specifications (Continuation)
Piston-Cylinder Assemblies
Standard Masses
Material: tungsten carbide
Poisson’s ratio: 0,218
Young’s modulus: 6 10
11
N/m
Typical geometry researched:
Straightness (typical manufacturing tolerance): 0,1 µm
Roundness (typical manufacturing tolerance): 0,1 µm
Parallelism (typical manufacturing tolerance) : 0,1 µm
Clearance between the piston and the cylinder: 0,2 to 0,4
µm according to the model
Stability of the effective area:
≤
1 ppm / an
Internal mass
Material: nickel chromium steel
Mass density: 7900 kg/m
3
± 10%
External optional calibration masses
Material: 304L steel
Mass density: 7920 kg/m
3
± 10%
Composition of the set: 5 x 2 kg
Adjusting tolerance to the nominal value: ±1E
-6
M
Calibration Uncertainty: ± 2,4E
-6
M
EMM Environmental Measuring Module
Sensors
Type
Accuracy
Alarm setting
Ambient temperature:
4-wire PT100
±
0,2°C
±
2°C
Relative humidity:
Capacitive sensor
±
5 %
±
20%
Atmospheric pressure:
Strain gauge
±
2 mbar
±
10 mbar
PCA temperature:
A DIN 43760 4-wire PT100
± 0,1 °C
N/A
Metrological Specifications
Researched metrological specifications
Linearity: 2E
-6
FS
Hysteresis: 2E
-6
FS
Bias: 7E
-6
FS
Repeatability:
≤
5E
-6
FS
Temperature effect: full compensation
Precision* :
≤
11E
-6
FS (
Combination of repeatability, hysteresis, linearity and 3-year stability)
Typical uncertainty researched for a 200 kPa range (k=2) : U=0.8 Pa + 1.E-5 P
Dimension (L x W x H):
530 x 400 x 320 mm
Measurement fluid:
Dry and non corrosive clean gas
Maximum overpressure:
110 % FS
Operating temperature:
10 to 30 ° C
Sampling rate:
250 ms
Operating humidity:
15 to 85 % HR
Computer interface:
RS232C
Power supply:
110 - 240 VAC, 50-60 Hz
Residual vacuum :
Pirani gauge
≥
1Pa ±1E
-4
Power consumption:
20 VA
Weight
20 kg
Summary of the Functions
The CPD8000 has a great variety of functions aimed at facilitating its use and assuring the quality of its long-term
operation:
Menus in English, French, German and Spanish
Saving of the metrological characteristics for 3 pressure
ranges
Large LCD back-lighting graphic screen with contrast adjustment
Mechanical protection against overpressure up to 110%
Overpressure visual and sound warning
Calibration visual warning when the calibration is
necessary
Pressure display in 12 pressure units, and a user unit
User adjustable pressure stability criterion
Front panel tarring key
Front panel ACF running key
Choice between internal/external calibration
EMM parameters display
Piston-cylinder assembly temperature measuring circuit
with auto-calibration by resistance of integrated reference
Permanent display of the residual vacuum
Summary of the Functions (Continuation)
Page 7 of 8
Desgranges & Huot WIKA Data Sheet CPD8000 04/2012
