IWKA PG02 VKR TEL-Z Self-Sufficient Measuring System

The IWKA PG02 VKR TEL-Z is a self-contained, portable test case designed for the calibration, verification, and testing of pressure measuring instruments and systems. Manufactured by IWKA (now part of the Kistler Group), this rugged test case integrates a pressure generator, precision reference gauges, and all necessary fittings to allow on-site testing of pressure gauges, pressure switches, pressure transmitters, and complete pressure measurement loops. The PG02 is specifically designed for field service engineers, calibration laboratories, and maintenance departments in industries such as oil and gas, chemical processing, power generation, and water treatment. The "VKR TEL-Z" designation indicates a specific configuration with particular pressure ranges and connection types (typically for up to 700 bar / 10,000 psi).

Technical Specifications

The IWKA PG02 VKR TEL-Z typically includes a hand-operated spindle pump for generating pressure. The pressure range is model-dependent; common ranges include 0 to 700 bar (0 to 10,000 psi) or 0 to 1000 bar (0 to 15,000 psi). The system uses mineral oil as the pressure medium (compatible with most industrial fluids). The test case includes a high-precision reference pressure gauge (accuracy class 0.1% or better) calibrated to national standards. It also provides one or two test ports (typically G 1/2 or 1/4 NPT female threads) for connecting the device under test. A fine adjustment valve allows precise pressure setting. The case itself is a robust, IP67-rated carrying case with a hinged lid, foam inserts, and space for hoses, adapters, and the reference gauge. Dimensions are approximately 500 mm × 400 mm × 200 mm, weight around 15-20 kg depending on configuration. Operating temperature range: -10°C to +50°C.

Key Features

• Self-sufficient portable test case with integrated pressure generator

• No external power required (manual hand pump)

• High-precision reference gauge (accuracy 0.1% FS or better)

• Wide pressure range up to 700 bar (10,000 psi) or higher

• Fine adjustment valve for precise pressure setting

• Multiple test ports for parallel connections

• Rugged carrying case with foam insert for safe transport

• Suitable for shop and field use

• Can be used with oil or water as test medium (depending on seal materials)

• Includes all necessary fittings and seals

Applications

The IWKA PG02 VKR TEL-Z is used for on-site calibration and testing of pressure instrumentation in industries such as oil refineries (calibration of pressure transmitters on pipelines), chemical plants (testing safety pressure switches), power generation (verifying boiler pressure gauges), water treatment (checking pump discharge pressure sensors), hydraulic systems (testing press and cylinder pressure gauges), and calibration laboratories (as a secondary standard). The portable design allows the test case to be taken directly to the instrument location, eliminating the need to remove gauges for bench testing, which saves time and reduces process downtime. The manual pump eliminates the need for compressed air or electrical power, making it ideal for remote locations or hazardous areas where electrical equipment is restricted.

Operation

To use the PG02, the technician first connects the device under test (DUT) to one of the test ports using the appropriate adapter. The reference gauge is already mounted in the case. The system is then filled with the appropriate test fluid (usually mineral oil). By operating the hand pump, pressure is generated. The fine adjustment valve allows precise pressure setting. The technician compares the reading on the DUT with the reference gauge reading. For calibration, multiple pressure points are tested. The case includes a release valve to safely vent pressure after testing. All connections should be checked for leaks before pressurizing. The system includes overpressure protection (a relief valve) to prevent damage if the pressure exceeds the rated range.

Maintenance and Calibration

The reference gauge must be periodically recalibrated by an accredited laboratory, typically every 12 months. The test case itself requires minimal maintenance: keep the pump seals lubricated, clean the test ports after use, and drain any residual fluid if storing for extended periods. The release valve and fine adjustment valve may require occasional cleaning if they become contaminated. The O-rings and seals in the pump should be inspected annually and replaced if cracked or hardened. IWKA (now Kistler) provides service kits with replacement seals and parts. The case should be stored in a dry environment to prevent corrosion. The oil should be replaced if contaminated with water or particulates.

Conclusion

The IWKA PG02 VKR TEL-Z self-sufficient measuring system offers a reliable, portable solution for pressure instrument calibration and testing in field and workshop environments. Its robust design, manual pressure generation, and high-accuracy reference gauge make it a valuable tool for maintenance teams requiring on-site verification of pressure measurement systems. The self-contained nature ensures that no external power or gas bottles are needed, reducing setup time and increasing operational flexibility.