Overview

The HNPMD-500 fully-automatic density relay calibrator is an improved version of the HNPMD-400. The precision of the sensor is further increased, and the integration of the mainboard A/D circuit is better, ensuring that the measurement precision can reach Grade 0.1 after calibration. Therefore, it can be used as a reference instrument.

The optimization of the measurement mode realizes “zero manual intervention” during the entire process, completely avoiding errors caused by manual observations in the previous calibration processes.

The 5.6-inch 800×480TFT industrial touch screen and the stainless steel panel complement each other. The instrument is highly operative and extremely easy to use. The calibration process is supervised by the single-chip microcomputer. The staff only needs to connect the pipeline, gas circuit and electric circuit correctly. The calibration results can be printed by its thermal printer in an easy-to-understand comparison format, so that the results are clear at a glance.

Main Features

• High degree of mechanical & electrical integration, advanced technology and reliable performance

• Able to simultaneously test two groups of alarm signals, two groups of blocking signals and one group of overpressure signals

• Dynamic compensation of pressure and temperature, and automatic conversion to the measured value at 20°C

• With multiple types of transition joints, adapt to the density relays of various GIS switches

• Built-in high-precision pressure controller and pressure transmitter to accurately detect the pressure

• With built-in steel cylinder, easy to use and reliable

• Less gas consumption during calibration: when the steel cylinder supplied is filled with the gas to reach the pressure 1MPa, about 90 tests can be carried out

• The calibrator can also calibrate the precision of the pressure meter or density meter

• Lithium battery-powered to achieve continuous operation for 8 hours or more

Technical Parameters