Hydraulic Deadweight Tester Performance with Digital Measurement Convenience E-DWT-H is an electronic calibrator designed to replace mechanical, piston-cylinder and weight based deadweight testers. It's a lighter weight, easier-to-use deadweight tester alternative that is at home in the lab or instrument shop, as well as in the field performing in-situ calibrations and tests.
E-DWT-H offers precision, low measurement uncertainty and the stability over time of a conventional deadweight tester without the inconveniences associated with the piston-cylinders, weights, hand pumps, and interconnecting plumbing.
Pressure - Calibrators (Electronic Deadweight Tester)
• No weights to load and unload or regularly send out for calibration
• No need to know and correct for local gravity or ambient temperature
• No piston-cylinder changes; switch Q-RPT ranges in seconds
• Not sensitive to level or vibration
• Able to set and read any pressure value exactly, no minimum increment limited by smallest available masses
• Operates in any unit of measure while deadweight tester is typically limited to the pressure unitstamped on the mass
• Perfect for applications that require setting a nominal pressure precisely on the device under test and measuring it, such as analog gauge calibration
• On-board, AutoTest calibration routines and data acquisition
• Interfaceable with a PC or laptop to allow for automated data acquisition
• Two year calibration interval supported at measurement uncertainty of ±0.025% of reading.
• Easily recalibrated without crossfloating. Automated calibration of E-DWT-H is possible using COMPASS® for Pressure software.
Q-RPT (quartz reference pressure transducer) 
module advantages:
In addition to outstanding metrological characteristics,
Q-RPT modules offer the advantages of:
• Negligible warm-up time
• Quartz element isolated from test medium
• Minimal sensitivity to orientation
AutoTest™ lets E-DWT operators quickly define test points and adjust all of the range-dependent settings with a single function.
The resolution and stability test used by the RPM4-E-DWT are set according to the range of the device under test. The upper limit setting is also set and provides range-based warnings and overpressure protection. While running AutoTests, the operator is prompted to set each sequential test point and test data is stored in the RPM4-E-DWT for recall or download. Typical test setup is quick and easy, but more complex tests can also be stored and reused.
E-DWT-H can be configure to provide uncertainty of ± 0.02% of reading from 1% to 100% of full scale range. Low torque variable volume allows for pressure generation up to 200 MPa (30,000 psi) with V minimal physical effort. AutoRange feature optimizes measurement, control and safety features for the specific range of the instrument being calibrated E-DWT-H includes everything to set, adjust and read pressure in one compact, transportable package and the rechargeable battery pack option provides for eight hours of field operation.
E-DWT-H includes flash memory for simple and free embedded software upgrades.
E-DWT-H Dual Q-RPTs E-DWT-H Single Q-RPT
A modern alternative to the traditional deadweight tester
