3. OPERATION
Page 17
© 2008 DH Instruments, a Fluke Company
Press [AutoZ] on the RPM front panel (see Section 3.7.10).
Connect the system under test/DUT to the E-DWT TEST port.
Use [HEAD] to enter the fluid head correction for the difference in height between the
E-DWT TEST port and the DUT reference level if significant (see Section 3.7.8).
Fill and prime the system under test/DUT (see Section 3.5.1):
Open the test system/DUT at the highest point possible.
Use the filling and priming pump to fill the test system.
Close the test system/DUT when all air has been purged.
Use [AutoRange] (see Section 3.7.5) or [AutoTest] (see Section 3.1.3) to set up the
RPM4-E-DWT for the test to be run.
Set zero gauge pressure to the DUT by opening the reservoir cap vent valve, the
reservoir shut off valve and the TEST shut off valve. The RPM4-E-DWT indication may
not be zero if the DUT reference height is different from the E-DWT reference height.
Set the next pressure. Close the reservoir shut off valve. Check that the TEST shut off
valve is open. Use the variable volume and fine adjustment valve to set pressure as
needed (see Sections 3.5.2, 3.5.3).
When the DUT is stable, read the reference pressure applied from the RPM4-E-DWT.
After the last pressure, return to zero by opening the reservoir shut off valve. The
RPM4-E-DWT indication may not be zero if the DUT reference height is different from the
E-DWT reference height.
3.2
TEST PORT CONNECTION
A single, high pressure TEST port is provided on the top of the E-DWT.
The test port connection is a DH500 F. DH500 is a gland and collar type fitting for 1/4 in. (6 mm) coned
and left hand threaded tube. DH500 is equivalent to AE F250C, HIP HF4, etc.
The E-DWT-10000-AF system is delivered with two adaptors to adapt the DH500 F TEST port fitting to
1/4 in. NPT F or 1/8 in. NPT F.
USE THE CORRECT PRESSURE CONNECTORS: The E-DWT TEST port fitting is a DH500 F (see Section 1.2.1).
It is NOT a 1/8 in. NPT F. Never use a fitting other than the corresponding male fitting in these connectors. Damage
to the connectors and dangerous failure under pressure could result from using incorrect fittings.
DO NOT APPLY PRESSURE UNTIL YOU ARE FAMILIAR WITH OPERATION: The E-DWT-10000-AF TEST
port can connect internally to both the RPM4-E-DWT’s 1 000 psi (7 MPa) and 10 000 psi (70 MPa) Q-RPTs.
The LO Q-RPT SHUT OFF valve on the front of the E-DWT isolates the low pressure Q-RPT when the high
pressure Q-RPT is in use. Do not apply pressure to the E-DWT until you are familiar with its operation and know
how to protect the low pressure Q-RPT from overpressure (see Section 3.4). FAILURE TO PROTECT THE LOW
PRESSURE Q-RPT FROM OVERPRESSURE MAY DESTROY IT. DAMAGE DUE TO Q-RPT OVERPRESSURE IS NOT
COVERED BY THE PRODUCT WARRANTY.
