The Ashcroft Type 1305D deadweight testers are
the most economical, reliable, rugged and Precision Deadweight
testers on the market today. The 1305D series testers are great for the bench
and portable for field work when you can't bring the gauge or instrument into
You can use the dead weights for calibrating or
attach a Certified Test Gauge to the dead weight port for
calibration purposes. Using the Test Gauges on the deadweight port can eliminate
the need to carry the calibration weights into the field.
Type 1305D deadweight testers provide an easy means of precisely
generating pressure to an accuracy of 0.1% of reading. Ashcroft 1305D units are
available for operating ranges up to 10,000 psi. They are ideal for use in
calibrating, setting, testing and repairing pressure measurement and control
devices. Each 1305D unit is traceable to the National Institute of Standards and
Technology, assuring instrument accuracy.
systems are designed to be field portable. A single carrying case holds the
pressure generation pump as well as all the necessary tools and accessories. A
second box contains the weights used for pressure generation (10,000 psi units
require two boxes of weights). Ashcroft deadweight testers qualify as primary
standards for pressure calibration.
The pump is a
two-stage hydraulic pressure generator. A built-in shuttle valve allows for
rapid pressure increase at low pressures. The rate of increase per pump cycle
can be reduced at higher pressures to minimize resistance. This is accomplished
by simply repositioning the two-position shuttle valve. With the shuttle valve
in the high-pressure position, increasing pressure even when near the 10,000 psi
upper limit can be accomplished quickly and easily. Final, precise adjustment is
accomplished through the use of an integral vernier-adjustment knob.
The 1305D is
provided with two-piston cylinder assemblies. A low-pressure piston for pressure
ranges from 15 to 2000 psi and a high-pressure unit for pressures from 75 to
10,000 psi. The high-pressure piston has an area of 1-80th of a square inch
while the low pressure piston has an area of 1/16th of a square inch. Weights
are provided for pressure increments of 5, 10, 20, 25, 40, 50, 100, 200 and 500
psi (depending on piston in use). An optional 1 psi incremental weight is also
available. Ashcroft 1305D testers can be used anywhere within their operational
range without any change in accuracy. The same weights are used with both piston
and cylinder assemblies.
Ashcroft 1305 units
are available for psi, bar, kg/cm2 and kPa ranges. Each unit comes complete with
a hand jack set (for removal of pointers on gauges being calibrated), spare
O-rings and all tools, accessories and fittings required for normal
Please "click" on the "Product Specs" icon at the top of the page
for complete information on the Ashcroft 1305D Series Deadweight Testers.