1. INTRODUCTION
Page 1
© 2008 DH Instruments, a Fluke Company
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1.1
PRODUCT OVERVIEW
E-DWT-10000-AF is an electronic deadweight tester designed to replace mechanical piston-cylinder
based deadweight testers with a lighter weight, easier to use alternative. The E-DWT is designed to be
used in the lab or instrument shop or to be taken into the field for performing in-situ calibrations and tests.
This high performance hydraulic pressure calibration system combines an electronic reference pressure
monitor and manually operated pressure generation and control hardware in a single, compact and
rugged package. E-DWT offers the ease of use and precision of continuous, real time electronic pressure
measurement with the simple and direct pressure control of high quality manual pressure hardware.
The electronic reference pressure monitor is a special version of DHI’s RPM4, designated RPM4-E-DWT
A70M/A7M-AF. RPM4-E-DWT A70M/A7M-AF covers the range from 0 to 10 000 psi gauge pressure
using two high precision quartz reference pressure transducers (Q-RPTs) and an on-board barometer to
measure pressure.
RPM4-E-DWT A70M/A7M-AF is controlled locally by the operator using its front panel display, keypad
and foot pedal or remotely by a computer using ASCII character command strings over its RS-232
interface.
RPM4-E-DWT A70M/A7M-AF uses an AutoRange feature to automatically select the most appropriate
Q-RPT and to optimize the E-DWT setup to cover the desired range of operation. A half-turn valve
isolates and protects the Lo Q-RPT from high pressure when the Hi Q-RPT is in use. Visual and audible
indicators assist the operator in setting the shut off valve correctly.
The E-DWT includes the hardware necessary to fill the system under test with oil and generate and
precisely adjust pressure across the E-DWT’s 10 000 psi (70 MPa) range.
The E-DWT-10000-AF system is delivered in a rugged, molded plastic transport case and includes two
battery/charger packs.
