Fully Automatic Pressure Calibrator Technical Requirements

The fully automatic pressure calibration system should comply with the following calibration procedures:

1) JJG882-2004 Pressure Transmitter Verification Procedure

2) JJG544-2011 Pressure Controller Verification Procedure

3) JJG52-2013 General Pressure Gauge, Pressure-Vacuum Gauge, and Vacuum Gauge Verification Regulations

4) JJG49-2013 Precision Pressure and Vacuum Gauges for Elastic Elements Calibration Procedure

5) JJG875-2005规程 for Digital Pressure Gauges Calibration

Full-Automatic Pressure Calibration Specific Technical Solution

1. Working Conditions:

 ◆ Ambient Temperature: (20±1)°C

 ◆ Relative Humidity: Constant Room with Relative Humidity Below 80%

 ◆ Frequency: 50 Hz

 ◆ Power Voltage: AC 220V

2. Technical Specifications

  ◆Working Medium: Non-corrosive, non-polluting air; no external high-pressure gas source required for calibration

 ◆ Pressure module range available: (-100～2500) kPa. Currently, when submitting for inspection, it is only necessary to send the measurement standard to the authorized metrology testing institution for calibration, without the need to move the entire platform. However, the "Procedure for Calibration of Automatic Standard Pressure Generators" was approved by the end of 2015, and once promulgated, whether it is an internal or external pressure module, all fully automatic pressure calibrators must send the entire unit to the authorized metrology testing institution for calibration, as control functions like overshoot and stability also need to be calibrated.

 ◆ Customizable verification range: any value between (-100～2500) kPa, vacuum can reach below -100 kPa.

 ◆ The internal pipelines have a larger diameter and are equipped with a gas-liquid separator, so they are not prone to being contaminated with water or oil from the calibration tape.

  ◆ Unit of Measure: kPa.

 ◆ Pressure Display Resolution: Touchscreen - 5 digits, Computer Interface - 5 digits.

 ◆ Pressure Accuracy Grade: 0.05 grade; 0.02 grade

 ◆ Current Accuracy Class: 0.02

 ◆ Stable Accuracy: ±5 characters or less

 ◆ Standard Check Points: At 0%, 25%, 50%, 75%, and 100% of the range, with automatic return. The computer connection allows for arbitrary settings.

 ◆ Custom Inspection Points: Any.

 ◆ Automatic voltage stabilization time at inspection point: 20 seconds, adjustable between (10-240) seconds.

 ◆ Transmitter automatic calibration duration (9 points stable voltage): Approximately 5 minutes.

 ◆ Pressure switch calibration time: approximately 2 minutes.

  ◆ Safety Protection: Overvoltage, overcurrent, sensor failure, etc. protection.

 ◆ Current Input: 2 channels, (0～22) mA.

 ◆ Switch Input: 2-wire dry contacts, capable of detecting contact resistance.

 ◆ Loop Power: 24VDC/30mA; if incorrectly connected to a standard meter, it will not damage the meter under test.

 ◆ Pressure Fitting: M20x1.5 internal threaded quick connector.

 ◆ Current/voltage interface: Standard banana plug with a diameter of φ6.

 ◆ Outfall: Inner Diameter: φ6mm.

 ◆ Weight: 19kg (pneumatic), 26kg (hydraulic).

  ◆ Dimensions: 290(H) * 574(W) * 316(D) mm

Automatic Calibration Software: Optional.