Fluke 6531、6532 E-DWT 电子自重测试套件

A powerful, complete hydraulic pressure calibration system to cover a wide workload

Fluke Calibration improved the hydraulic pressure calibration process with theintroduction of E-DWT-H electronic deadweight tester. E-DWT-H is an electronic calibrator designed to deliver traditional hydraulic deadweight tester performance with digital measurement features and convenience. Some improvements offered by E-DWT-Hinclude:

•No weights to load and unload, transport or send out for calibration

•Provides real-time pressureindication with no need to know and correct for local gravity or ambient temperature

•No piston-cylinder changes

•No significant sensitivity to level or vibration

•Able to set and read any pressure value exactly, no minimumincrement limited by smallest available masses; perfect for applications that require setting a nominal pressure precisely on the device under test and measuring it, such as analog gauge calibration

•Operatesin any unit of measure, switching easily from one unit to the next

The E-DWT-H is at homein metrology and calibration labs, on the production floor orin the field. It can operate with a wide selection of test mediums,including Sebacate calibration fluid, mineral oil, water and other liquids. ± 0.02% of reading total one-year measurement uncertainty rivals the best laboratory deadweight testers.

The E-DWT-H is usedin the lab orinstrument shop or can be takeninto the field for performingin-situ calibrations and tests. This hydraulic pressure calibration system combines a high performance electronic reference pressure monitor and manually operated pressure generation and control hardwarein a single, compact and rugged package. E-DWT-H offers the ease of use and precision of continuous, real time electronic pressure measurement with the simple and direct pressure control of high quality manual pressure hardware. E-DWT is named “electronic deadweight tester” because it isintended as a lightweight and easy to use, modern alternative to conventional piston-cylinder and weight based deadweight testers.

The E-DWT’s electronic reference pressure monitor is a special version of RPM4, designated RPM4-E-DWT. RPM4-E-DWT can be configured with one or two high precision quartz reference pressure transducers (Q-RPTs) with ranges from 7MPa (1 000psi) to 200MPa (30 000psi).

The RPM4-E-DWT is controlled locally by the operator using its front panel display, keypad and optional foot pedal or remotely by a computer using ASCII character command strings over its RS-232interface.

RPM4-E-DWT uses an AutoRange feature to automatically select the most appropriate Q-RPT and to optimize the E-DWT-H setup to cover the desired range of operation. When two Q-RPTs areincluded, a half-turn valve isolates and protects the Lo Q-RPT from high pressure when the Hi Q-RPT isin use. Visual and audibleindicators assist the operatorin setting the shut off valve correctly.

The E-DWT-Hincludes the hardware necessary to fill and prime the system under test and generate and precisely adjust pressure up to 200MPa (30 000psi).

The E-DWT-H can be powered with an optional battery/charger pack for usein locations where AC power is not readily available.

High performance calibration made simple

Fluke Calibration electronic deadweight tester kits feature E-DWT-H configurations combined with the accessories needed for a complete calibration system. Model 6531 options feature E-DWT-H configurations with a single quartz reference pressure transducer (Q-RPT) to offer percent of reading performance from 10% to 100% of device full scale. Model 6532 options feature an additional Q-RPT to maximize workload coverage, with percent of reading performance from 1% to 100% of device full scale. Anincluded vacuum fill kit allows the E-DWT to be filled with your choice of compatible fluid, while eliminating problematic air pockets from the test circuit. Alsoincluded is a test station adapter to mount just about any pressure device to be tested without using PTFE tape or wrenches. 6531 and 6532 kits provide all you need to perform high level hydraulic pressure calibration right out of the box.

• Pressure ranges available to 200MPa (30,000psi)

• ±0.02% of reading total one-year accuracy, 0.025% for two years

• Low torque variable volume allows for pressure generation and control up to 200MPa (30,000psi) with minimal physical effort

• Built-in priming system to fill system with test fluid and purge unwanted air to assure smooth operation

• Unique test port design eliminates the need for PTFE tape or wrenches. Adaptersincluded for 1/8in, 1/4in, 3/8in and 1/2in NPT, 1/8in, 1/4in, 3/8in and 1/2in BSP, M20 x 1.5 and M14 x 1.5

• Compatible with a wide range of liquids,including water. Vacuum fill kitincluded to fill the E-DWT with any compatible test medium

• AutoTest™, AutoRange, ready/not readyindicator, onboard data capture and storage, overpressure alarm, RS-232 remoteinterface and other advanced features to simplify testing, improve safety and prevent calibration errors and damage to equipment

• Optional foot switch accessory allows hands-free data collection when running AutoTests

• Rechargeable battery pack and transport case options for field operation

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