5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Page 93
© 2008 DH Instruments, a Fluke Company
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5.1
OVERVIEW
E-DWT-10000-AF was designed for maintenance free operation. No maintenance is required other than:
•
Regular AutoZeroing of quartz reference pressure transducers (Q-RPTs) (see Sections 3.9.1,
3.7.10).
•
Periodic calibration of Q-RPTs (see Section 5.2.2).
•
Adjustment of the on-board barometer (see Section 5.2.2).
•
Overhaul of the E-DWT (see Section 5.4.1).
From a maintenance, calibration and repair point of view, the RPM4-E-DWT reference pressure monitor
and the rest of the E-DWT are treated as separate sub-systems.
E-DWT-10000-AF is a sophisticated pressure measuring instrument with advanced on-board features
and functions. Before assuming that unexpected behavior is caused by a system defect or failure, use this
manual and other training facilities to become thoroughly familiar with E-DWT operation.
For rapid assistance in specific situations see Chapter 6 for troubleshooting information.
Unauthorized service or repair of E-DWT-10000-AF during the warranty period is undertaken at the
owner’s risk and may cause damage that is not covered under warranty and/or may void the warranty. For
warranty service, contact a DHI Authorized Service Provider (see Table 25).
5.2
RPM4-E-DWT MAINTENANCE
The only regular maintenance of the RPM4-E-DWT is day to day zeroing of the Q-RPTs (see Section
5.2.1), regular recalibration of the Q-RPTs (see Section 5.2.2) and adjustment of the on-board barometer
(see Section 5.2.2).
5.2.1
AUTOZERO OF Q-RPTS
See Sections 3.9.1 and 3.7.10 for complete information on Autozeroing of Q-RPTs.
The RPM4-E-DWT should be AutoZeroed prior to running each test.
Before AutoZeroing, allow at least two minutes for full system stabilization. Be sure that the
pressure applied is truly zero (i.e., the E-DWT TEST port is open to atmosphere).
To cause the range to Autozero, press
[AutoZ]
.
