DH Instruments PPCK PLUS, Руководство по эксплуатации и обслуживанию

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PPCK+™ Operation and Maintenance Manual
Page 3
©2001 DH Instruments, Inc .
Table 1. Model Designations and Ranges
RPT
US UNITS VERSION (psi) SI UNITS VERSION (MPa)
DESIGNATION RANGE1 (LO) RANGE2 (MID) RANGE3 (HI) RANGE1 (LO) RANGE2 (MID) RANGE3 (HI)
A10000 3 000 6 000 10 000 20 40 70
A6000 2 000 4 000 6 000 13 25 40
A3000
1 000 2 000 3 000 6 12 20
Note: All ranges are both absolute and gauge and support all measurement units available. The “US”
or “SI” distinction only affects the nominal range values and settings.
1.2.2.1 REFERENCE PRESSURE TRANSDUCER (RPT) SPECIFICATIONS
All values are ± FS of the active range unless otherwise indicated.
Warm Up Time: 30 minutes for best performance
Resolution: To 1 ppm, user settable by individual range
Temperature Effect: Fully compensated from 0 to 50 °C with active independent
temperature measurement
0.005 % maximum temperature effect in normal ambient
15 to 35° C operating range
Acceleration Effect:
±
0.008 %/g maximum, worst axis
Allows operation at
±
20° from reference plane without
significant effect
Measurement Precision
1
:
±
0.01 %
Predicted Stability
2
: 90 day 1 year
Gauge Mode (w/Autozero): 0.003 % 0.009 %
Absolute Mode (w/Autozero): 0.003 % 0.009 %
Absolute Mode (w/out Autozero): 0.006 % 0.015 %
Measurement Uncertainty
3
: 90 day 1 year
Gauge Mode (w/Autozero): 0.012 % 0.015 %
Absolute Mode (w/Autozero): 0.012 % 0.015 %
Absolute Mode (w/out Autozero): 0.015 % 0.020 %
1 Measurement Precision: Combined linearity, hysteresis, repeatability of measurements made
by the reference pressure transducer.
2 Predicted Stability: Maximum change in zero and span over specified time period for typical
RPT used under typical conditions. As stability can only be predicted and varies from RPT to
RPT, stability for a specific RPT should be established from experience.
3 Measurement Uncertainty: Maximum deviation of the reference pressure transducer indication
from the true value of measured pressure including precision, stability, temperature effect and
calibration standard uncertainty of ± 0.005 % of reading.
The influence of the dynamic compensation for atmospheric pressure in gauge mode
measurement is less than ± 2.5 Pa (0.00035 psi).