ENERAC DGR-2 Fiche D'instructions page 3

3.0 DESCRIPTION
The Enerpac DGR-2 digital pressure gauge is
designed to monitor system pressures of up
to 20,000 psi [1380 bar] . Standard features
include:
• Displays available in multiple units: psi, bar,
mPa and kg/cm (user-selectable) .
2
• Zero reset feature ensures that gauge reads
actual system pressure .
• Powered by two 1 .5V AA batteries (included) .
• IP67 rated case design .
• User-selectable gauge shut-off timer .
• CE and RoHS compliant .
Note: Refer to Section 7 .0 of this manual for
detailed product specifications and installa-
tion dimensions .
4.0 INSTALLATION INFORMATION
IMPORTANT: To ensure proper operation and
to help prevent gauge failure, read and under-
stand the following instructions and precau-
tions before installing the gauge .
WARNING: A failure resulting in
personal injury and/or property
damage may be caused by
excessive overpressure, excessive vibration
or pressure pulsation, excessive instrument
temperature, corrosion of the pressure
containing parts, or other misuse . Consult
Enerpac before installing the gauge if there are
any questions or concerns .
Overpressure
:
Pressure spikes in excess of the rated pressure
of the gauge may cause irreversible electrical
and/or mechanical damage to the pressure
measuring and containing elements . Fluid
hammer and surges can destroy any pressure
transducer and must always be avoided .
A pressure snubber should be installed to
eliminate the damaging hammer effects . Fluid
hammer occurs when a liquid flow is suddenly
stopped, as with quick closing solenoid valves .
Surges occur when flow is suddenly begun, as
when a pump is turned on at full power or a
valve is quickly opened .
WARNING: Gauge is rated at
20,000 psi [1380 bar] maximum
pressure . Never exceed this
maximum pressure rating .
Pressure Surges:
Surges are particularly damaging to pressure
gauges if the pipe is originally empty . To avoid
pressure surges, fluid lines should remain full
(if possible), pumps should be brought up to
power slowly, and valves opened slowly . To
avoid damage from both fluid hammer and
surges, a surge chamber should be installed .
Symptoms of fluid hammer and surge's
damaging effects:
• Digital gauge exhibits large zero offset .
• Digital gauge pressure display remains
constant regardless of pressure .
• Error code is displayed on screen .
Cold Temperatures:
Formation of ice in the gauge pressure port
can cause permanent damage to the gauge .
Whenever possible, mount the gauge in the
upright vertical position to help prevent possible
overpressure damage due to freezing .
Note: Inspect the entire hydraulic system for
leaks if it is suspected that water has entered
the system . Make required repairs before
returning system to operation .
Installation Requirements:
A 1-1/16 inch [27mm] hex wrench is required
for tightening the gauge to the hydraulic
connection . Apply Teflon tape or a suitable
sealing compound to the 1/4 inch NPTF threads
of the gauge . Using the wrench, tighten 1 turn
beyond hand-tight or until a leak-proof seal has
been achieved .
CAUTION: Tightening the gauge by
grasping or putting a tool on the
plastic
permanent damage to the gauge .
3
1/4" NPTF
Hydraulic Connection
housing can cause