Solution For Pressure
Measurement & Calibrationwww.pdk.co.kr
www.pcal.co.kr
www.pdkmall.co.kr

PDPG-A

Automated Dead-Weight Tester

Automated Dead-Weight Tester is much more convenient
than normal manual Dead-Weight Tester. PDPG-A
provides automated mass handling system with

Dead-Weight Tester is used asa generator of an accurately known pressure. It measurespressure as force per unit area. Therefore, Dead-Weight
Tester is the most accurate pressure calibrator.

precision parts and high-end technology for better,easier and accurate calibration.
To install the masses, a binary mass loading tray isplaced on the piston cap and a mass bell is installedover the tray. The mass set's main mass discs are hung

∙ Pressure ranges Oil 100 / 250 / 500 / 1000 / 2500 bar

from the mass bell. Binary masses are placed in∙ Automated Mass Handling Unit

descending sequence on the mass bell hanger and∙ 0.008% of uncertainty

on the tray.

∙ Wing-type special designed cylinder∙ Piston Cylinder Modular designed

To load a specific mass value, the mass handling system∙ Quick & Easy installation of Piston/Cylinder

raises the entire mass load above the piston upper∙ 9 LED for piston float-position display

end of stroke to the mass selection position. The mass

∙ Automatic-Intelligent piston rotation

is raised by two types of a pneumatically actuated lifter∙ Separated from the main unit and the pressure
regulator can be used for various purposes.

acting on a lifter shaft connected to the bell and binary∙ P/C Temperature accuracy- better than ±0.2 ℃

held in place by engaging three selector pins. When

∙ Small size for easy movement during calibration∙ Easy to assemble and disassemble

mass spindle. Each mass that is not to be loaded isthe mass selection is complete, the lifter moves down,
placing the lifter shaft, binary spindle, bell and all thereleased masses onto the piston.
PDPG-A01

Solution For Pressure
Measurement & Calibrationwww.pdk.co.kr
www.pcal.co.kr
www.pdkmall.co.kr

The PDPG-A mass handling system is designed and tested
to provide years of reliable, maintenance free mass
manipulation.

PistonCylinderControl of the mass handling system is integrated into
PDPG-A’s intelligent operation. In pressure entry mode,
when a target pressure command is entered from thePortion of theapplied force
when mounting

P/C Module

front panel or remotely, PDPG-A calculates the massrequired to achieve the target pressure. It then stops
piston rotation and loads the mass value by sending
a command to the PDPG-A. The true value of mass loaded
and exact pressure value achieved are reported andPiston - Cylinder

updated real time.
This type of automated mass handling system is thefastest mass loading system in the world.
Use standard pressure controllers to automate pressurecontrol and make fully automated piston gauge operationa reality.
Wing type P/C is the most optimized and modernizeddesign for piston-cylinder unit. A protrusion on the cylinder
face enables easy and firm installation to the mount.
Unique end shape of cylinder hole assures excellent
metrological characteristics.
PDK Cylinder

Normal Cylinder

In order to measure the accurate temperature of the piston-cylinder, precision platinum resistance temperature sensor
is equipped with uncertainty of 0.2 ℃. Incorrect measurementof the piston cylinder temperature about 1 ℃ gives pressure
error around 9 ppm. PDPG temperature sensor is locatedat the easy place to remove for calibration.
In order to monitor the float position of piston, non-contact
height sensor was developed. In total, 9 LEDs are attachedon the front panel of PDK's PDPG. Each LED will be lighting
at 1 mm interval according to piston movement. When green
LED is shining, it indicates “measurement available.”

ManualRotation
AutomaticRotation

LED(red, yellow,green)

In order to rotate piston, two methods are available.
The first one is to press the red button on the front panelof PDPG. The piston can be rotated only when you want to
PDK's patented cylinder (Korea, 10-0449151) is made oftungsten carbide. PDK's piston-cylinder shows highprecision and stability. The modular piston-cylinder unit
can be replaced by hands very easily and quickly without
special tool. It also as excellent structure which prevents

rotate. Second method is to press the green button.
When the piston is located in a suitable operation position,
the piston rotates automatically. The operation interval
covers ±3 mm from reference float line. If out of range,
piston stops automatically.

environmental contamination from outside.

PDPG-A02

Solution For Pressure
Measurement & Calibrationwww.pdk.co.kr
www.pcal.co.kr
www.pdkmall.co.kr

Pressure generator / controller is separated with PDPG. Then if valve is mounted on connection, Pressure generator /controller can be Comparator or Comparison Tester therefore it can saving the additional cost.
For Hydraulic, pressure generator / controller consists of pump priming pump and a precision spindle pump. O-ring
designed for high-pressure structure of almost no internal leakage, a torque of the lowest among the same class andduring long-term use, it will needs less power in high pressure up to more than 2000 bar. Available installed pressure
generator / controller which is special designed by PDK.

Manual hydraulic pressure
Generator / Controller

OPS-J for Oil

Manual hydraulic pressure
Generator / Controller

OPS-H for Oil

Generator / Controller

OPS-2 for Oil

MPC-70 for Gas

For Dead-weight tester, Comparator
and Comparison Tester· Pressure control range:
up to 2000 bar· Lever type priming pump:up to 400 barFor pressure generation and adjustment
systems that required very precisepressure regulation quick & easy
to use.

For Dead-weight tester, Comparator
and Comparison Tester· Pressure control range:
up to 2000 bar· Pneumatic pump priming:
up to 1000 bar
For pressure generation and adjustment
systems that required very precisepressure regulation quick & easy
to use.

For Dead-weight tester, Comparator
and Comparison Tester· Pressure control range:
up to 3000 bar· Pneumatic pump priming:
up to 2000 bar
For pressure generation and adjustment
systems that required very precisepressure regulation joystick pressurecontrol

For Dead-weight tester, Comparator
and Comparison Tester (Precision control)· Pressure control range:
vacuum to 70 bar
For pressure generation and adjustment
systems that required very precisepressure regulation quick & easy
to use.

Manual pneumaticpressure Controller

PDPG-A terminal is remote control unit for automated Dead-Weight Tester.
When user set target pressure on PDPG-A Terminal, it calculates the mass required to achieve the target pressure andthe true value of mass loaded and exact pressure value achieved are reported and updated real time.
PDPG-A equipped environment temperature sensor, humidity sensor and atmosphere senor for buoyancy correction
about current loaded mass by automatic air density. It also can measures the piston cylinder temperature for automatic
calculation about coefficient of expansion for each temperature value then shows real-time current defined reference
pressure with various pressure units. PDPG-A terminal shows piston location (Height) and current loaded mass information
for help to get pressure calibration data intuitionally.

PDPG-A03

Solution For Pressure
Measurement & Calibrationwww.pdk.co.kr
www.pcal.co.kr
www.pdkmall.co.kr

Specification
Maximum Pressure
Measurement uncertainty
Piston cylinder material
Mass changing time
Drive air supply
Units
Size
Mass material
Mass set
Test port
Media

Oil – up to 2500 bar
0.008 % of reading
Tungsten carbide<10 sec>5 bar 'shop air'bar, MPa, kPa, kgf/cm2, psi and etc.
420 W x 350 D x 500 H
Stainless SteelOil - Total 50 kg (Standard)
Oil - 9/16" UNF Cone & Thread (AE F250C, HIP HF4)
Oil (Sebacate Oil recommended)

Workable temperature /Storage temperature

10 °C ~ 35 °C / -20 °C ~ 70 °C

Workable Humidity /Storage Humidity
Power Requirements

20 %RH ~ 75 %RH / 0 %RH ~ 90 %RH
220 Vac, 50/60 Hz

Oil pressure P/C and pressure range
Min pressure

Max Pressure

Min increasement
pressure(Automated)

2 bar / kg

2 bar

100 bar

200 mbar

5 bar / kg

5 bar

250 bar

500 mbar

10 bar / kg

10 bar500 bar

1 bar

20 bar / kg

20 bar1000 bar

2 bar

50 bar / kg

50 bar2500 bar

5 bar

Pressure

PistonOrder Information
Model / Description

PDPG-A - PISTON

Oil Automated Dead-Weight Tester** User must supplied local acceleration of gravity when order.

Option· Pressure generator / controller

Accessories
OPS-J (Oil Standard)
OPS-2OPS-H
MPC-70 (Gas)· Trim Mass F1 grade (10 mg to 50 g, 1-2-2-5 Series)· Multi test port
· KOLAS Certificated calibration report· Main unit and mass set withautomated mass handling unit
· Terminal 11" Touch panel· Piston/Cylinder· Pressure controller· Fitting adaptor set· Sebacate oil· Power cable