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Fluke P3115-XXX Oil Hydraulic Deadweight Tester

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Fluke P3115-XXX
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Fluke P3115-XXX Oil Deadweight Tester - Angled
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Only available from authorised Fluke distributors, such as PASS Ltd. Terms and conditions apply.

Via the creation of hydraulic pressure using mineral oil and a high-quality screw press, the Fluke P3115-XXX Oil Hydraulic Deadweight Tester can be used to calibrate pressure sensing instruments such as transducers, transmitters, gauges and pressure switches. This instrument is available in four models, all optimised for accuracy and ease-of-use, but which vary in regards to their pressure ranges and measurement units. For further information regarding the differences between these models, please see the table below.

Product Code Product Name  Pressure Range
P3115-BAR Fluke P3115-BAR Oil Hydraulic Deadweight Tester - 1100 bar 20 to 1100 bar
P3115-KGCM2 Fluke P3115-KGCM2 Oil Hydraulic Deadweight Tester - 1100 kgf/cm2 20 to 1100 kgf/cm
P3115-PSI Fluke P3115-PSI Oil Hydraulic Deadweight Tester - 16k psi 200 to 16 000 psi
P3115-MPA Fluke P3115-MPA Oil Hydraulic Deadweight Tester - 110 MPa 2 to 110 MPa

For a quick introduction to these instruments, please see the following video.

Measuring Pressure with a Deadweight Tester

The integrated hand-pump can be used to prime the Fluke P3115-XXX Oil Hydraulic Deadweight Tester, as well as accommodate large volume requirements, whilst the high-quality screw press, as mentioned above, may be used with the mineral oil to create hydraulic pressure. It may also be used to make fine pressure adjustments.

During the calibration process, the user is able to view the oil level and quality via the clear, acrylic reservoir. Post-calibration the mineral oil can be quickly and easily drained via the built-in drain plug.

When hydraulic pressure is created the piston rises in the cylinder. In order to balance this upward force, accurately calibrated weight masses are added to the piston. Each of the weight masses is constructed from series 3, non-magnetic, austenitic, stainless steel and is marked with both the instrument’s serial number and the nominal pressure values relative to high- and low-pressure pistons. In order to determine the final pressure value, the relevant nominal values, marked on each of the weight masses added to the piston, are combined. For further information regarding this process, please see the video below.

P3100 Series Hydraulic Deadweight Tester - Video Demo

Weight masses may be stored in a robust case with a self-locking mechanism, ensuring that they can be safely and securely transported between worksites. The Fluke P3115-XXX Oil Hydraulic Deadweight Tester is also supplied with a removable lid, again ensuring that it can be easily transported.

Adding to this instrument’s practicality is its test-station design with O-rings and the inclusion of 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch NPT or BSP female adaptors; these features remove the need for PTFE tape and/or wrenches when attaching additional instruments. The Fluke P3115-XXX Oil Hydraulic Deadweight Tester’s adjustable feet and mounted spirit level also add to the ease, as well as the accuracy, with which this instrument can be set up.

Working to ensure this instrument’s precision is its piston and cylinder assembly with a floatation indicator, it has been manufactured in accordance with the highest standards; this means that it has certified accuracies traceable to international standard laboratories, such as the National Institute of Standards and Technology (NIST). The assembly has been designed to preserve the stability and durability of the Fluke P3115-XXX Oil Hydraulic Deadweight Tester, whilst limiting the effects of thermal coefficients and distortion.

In addition to this, the Fluke P3115-XXX Oil Hydraulic Deadweight Tester is supplied with a traceable certificate of accuracy and is calibrated to standard gravity (980.665cm/s²), giving the tester an overall standard accuracy of 0.015%. However, the Fluke P3115-XXX Oil Hydraulic Deadweight Tester can be calibrated to the user’s local gravity, thereby improving the instrument’s accuracy to 0.008% by accounting for the effect of this localised force on the weight masses.

The Fluke P3115-XXX Oil Hydraulic Deadweight Tester is ideal for calibrating pressure sensing instruments accurately and efficiently.

Fluke P3115-XXX Oil Hydraulic Deadweight Tester Key Features

  • Create hydraulic pressure to calibrate pressure sensing instruments
  • Calibrate instruments such as transducers, transmitters, gauges and pressure switches
  • Available in four models with varying pressure ranges and measurement units
  • Integrated hand-pump for priming the system and accommodating large volume requirements
  • High-quality screw press for creating pressure and making minor pressure adjustments
  • Clear, acrylic reservoir
  • Integrated drain plug
  • When hydraulic pressure is created the piston rises in the cylinder
  • Accurately calibrated weight masses are added to the piston to balance the upward force
  • Weight masses are constructed from series 3, non-magnetic, austenitic, stainless steel
  • Weight masses are marked with the instrument’s serial number and nominal pressure values relative to high- and low-pressure pistons
  • The final pressure value is determined by adding together the relevant nominal pressure values on each of the weight masses placed on the piston
  • Weight masses may be stored in a robust weight box with a self-locking mechanism
  • Removable lid
  • Test-station design with O-rings
  • Supplied 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch NPT or BSP female adaptors
  • PTFE tape and/or wrenches are not required to attach additional instruments
  • Adjustable feet
  • Mounted spirit level
  • Piston and cylinder assembly includes a floatation indicator
  • Piston and cylinder assembly has been manufactured in accordance with the highest standards and features certified accuracies traceable to international standard laboratories (NIST)
  • Piston and cylinder assembly preserves the stability and durability of the tester whilst limiting the effects of thermal coefficients and distortion
  • Supplied with a traceable certificate of accuracy
  • Calibrated to standard gravity (980.665cm/s²)
  • Standard accuracy of 0.015%
  • Can be calibrated to the user’s local gravity
  • Accuracy may be improved to 0.008%
  • Ideal for calibrating pressure sensing instruments accurately and efficiently

What’s Included?

  • Your Choice of Fluke P3115-XXX Oil Hydraulic Deadweight Tester
  • Traceable Certificate of Accuracy
  • Weight Masses
  • Removable Lid
  • 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch NPT or BSP female adaptors
  • Spare Seals
  • Operating Fluid (where applicable)

Fluke P3115-XXX Oil Hydraulic Deadweight Tester Technical Specifications 

Accuracy  ±0.015% of reading (±0.008% optional)
*Accuracy based on % of reading from 10% to 100% of the piston range when used in accordance with the corrections found on the calibration certificate. Below 10% ± (accuracy class) x 10% of the piston range.
Materials of Construction
Standard weight material Series 3 non-magnetic austenitic stainless steel
Weight density 7.8 g/cm³
Optional fractional weights Solution heat treated aluminum
Weight density 2.7 g/cm³
Piston material Tungsten carbide with nickel binder
Density- 15.0 g/cm³
Cylinder material Hardened martensitic steel
Tungsten carbide 
Thermal coefficients of expansion Oil piston/cylinder 16.5 ppm/°C
General Specifications 
Test port adaptors 1/8, 1/4, 3/8 and ½ NPT or BSP
Instrument weight 36 lbs (16 kg)
Instrument size 17.5 W x 12 D x 8.5 H
Mass set weight (typical) 80 lbs (36 kg)
Reservoir volume 150 cc
Screw press displacement 5.5 cc
Pump displacement 4.7 cc per stroke
O-ring seal materials Buna N as standard, Viton and EPDM available
Weight Increments
Minimum Standard Weight Increments Up to 500 psi (35 bar): 1 psi (0.1 bar)
500 to 5000 psi (35 to 350 bar): 10 psi (1 bar)
5000 to 20,000 psi (350 to 1400 bar): 20 psi (2 bar)
Model P3112: 1 psi (0.1 bar)
Optional Fractional Weights Up to 500 psi (35 bar): 0.1 psi (0.01 bar)
500 to 5000 psi (35 to 350 bar): 1 psi (0.1 bar)
5000 to 20,000 psi (350 to 1400 bar): 2 psi (0.2 bar)
Operating Fluid
Mineral oil Shell spindle oil 22, our reference 55-655, viscosity 40 cs@ 20°C
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Additional Information
SKU Fluke P3115-XXX
Manufacturer Part Code 4185090
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