E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL
© 2008 DH Instruments, a Fluke Company
Page 4
4. Maximum deviation of the Q-RPT indication from the true value of applied pressure including
precision, predicted two year stability with rezeroing, temperature effect from 18 to 28 ºC and
calibration uncertainty (assumes calibration reference uncertainty of ±0.02% of reading, k=2),
combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in
Measurement.”.
1.2.3.2
ON-BOARD BAROMETER
The measurement uncertainty of the on-board barometer is not significant to
E-DWT measurement uncertainty. It is used only to measure small, short term
changes in atmospheric pressure to provide dynamic compensation of the
Q-RPT’s atmospheric pressure offset in gauge pressure measurement mode
(see Section 3.9.1)
Sensor Technology: Micro-machined silicon
Warm Up Time: None required
Resolution: 0.1 Pa (0.000015 psi)
1.3
VIEWS AND SCHEMATICS
1.3.1
E-DWT-10000-AF VIEWS
1.3.1.1
FRONT VIEW
1. TEST port (DH500F)
2. Reservoir cap vent valve
3. Priming pump
4. Reservoir cap
5. Reference pressure monitor (RPM4-E-DWT)
6. Test shut off valve and fine pressure adjustment
7 ‘Lo Q-RPT shut off’ valve position prompt LED
8. Lo Q-RPT shut off valve
9. ‘Lo Q-RPT active’ valve position prompt LED
10. ‘Lo Q-RPT active’ caution indicator
11. Reservoir shut off valve
12. Variable volume (pressure generation)
13. Variable volume piston position indicator
Figure 1.
E-DWT-10000-AF front view
