Pressure Controller MC300

Output Division and Auto- Step Output

The MC300 allows the set pressure to be divided into a desired number of output steps (n/m). By setting the target pressure to the full scale of the device under test and specifying the number of steps, users can perform smooth step-up and step-down operations at the touch of a button. The auto-step function automatically executes each step at preset intervals, enabling efficient and repeatable testing.

Example of auto step when start step n = 1, number of division m = 4

Sweep Output and Repeat Function

The MC300 delivers smooth, continuous linear pressure output from zero to full scale through precise needlevalve control. The sweep output function automates this process, making it ideal for applications such as pressure switch actuation verification, meter testing, and clog detection. When combined with the repeat function, the sweep or auto-step output can be executed continuously, providing greater flexibility and efficiency in automated testing.

Negative Pressure Output without Vacuum Pump

The MC300 generates negative pressure down to ‒1.2% of its full range without requiring an external negative pressure source such as a vacuum pump. This capability (unavailable in many conventional pressure controllers) simplifies system setup and makes the MC300 ideal for applications such as precise zero-point adjustment and compliance testing under slight negative pressure conditions.

Sweep Output from ‒2.4 kPa to 10 kPa (200 kPa Range Model)

Pressure Output Status Monitoring

Pressure values measured by the built-in sensor are displayed on the screen and available via analog output, allowing both pressure transitions during control and setpoint stability to be easily monitored. Comparator output and on-screen indicators provide additional confirmation, with the display changing from white to green when the pressure reaches the specified range for instant visual verification.

Blood Pressure Monitor Testing

Blood pressure monitors require accurate pressure measurement and control up to 40 kPa (300 mmHg) to ensure compliance with medical standards. With a pressure range up to 200 kPa, the MC300 provides ample margin while delivering the accuracy and resolution required to support both development and production testing of blood pressure monitors and medical devices with integrated blood pressure measurement functions. The MC300 is also capable of generating negative pressure without the use of a vacuum pump, allowing functional testing under negative pressure conditions specified by applicable standards using a single instrument. For applications requiring enhanced measurement confidence, the MT300 Digital Manometer (Gauge Pressure model) can be used alongside the MC300 to monitor pressure directly at the device under test.

Leak/Airtightness Testing of Enclosures

Leak (airtightness) testing is commonly used to evaluate the waterproof and dustproof performance of enclosures using the pressure change method. In this approach, the test object is pressurized to a specified starting pressure and, after a defined stabilization period, the pressure change is measured to confirm compliance with allowable leakage limits.
Accurate leak measurement depends on maintaining a stable and repeatable starting pressure. The MC300 delivers smooth, highly repeatable pressurization to the target pressure, reducing measurement variation and ensuring consistent, reliable test results. This makes it well suited for both development testing and high-throughput inspections, including mass production and shipping verification. MT300 Digital Manometer monitoring also available for additional confidence.

Submersible Water Level Meter Testing

During development and testing of water level meters creating actual water levels, for example, of 20 meters is challenging. Instead, a pressure controller applies equivalent air pressure to simulate an underwater environment.
The MC300 provides rapid pressurization to target pressure with minimal overshoot and extremely low hysteresis, delivering stable, high-quality pressure control for submersible water level meter development and verification. It also ensures precise control during both pressurization and depressurization, helping to prevent overpressure and hysteresis effects.

Pressure Transmitter Calibration

Pressure transmitters used in industrial plants require regular calibration to maintain measurement accuracy and process integrity.
The MC300 Pressure Controller provides precise, stable pressure generation required for accurate transmitter calibration. Its auto-step function enables automated multi-point pressure increase and decrease testing with minimal hysteresis and high accuracy, improving repeatability and reducing operator workload.
When used together with the MT300 Digital Manometer, the MC300 enables highly accurate comparison calibration with full automation. In addition, the MT300 can be equipped with a 24 V power supply and voltage/current measurement functions, eliminating the need for external power supplies or multimeters and enabling a more compact, efficient calibration setup.

Silicon Resonant Sensor

Stable pressure control depends on a high-precision pressure sensor to monitor output pressure for feedback.
The silicon resonant sensor installed in the MC300 possesses excellent characteristics that meet the requirements for accurate measurement, including stability, repeatability, sensitivity, and temperature characteristics.

High sensitivity, high resolution, and superior long-term stability
The vibrator is placed in a vacuum, which reduces dissipation of vibration energy. This, combined with the excellent elastic properties of single-crystal silicon, results in a high Q value.

Extremely low temperature dependence
Two vibrators are used, and the pressure is calculated using a differential method, which calculates the difference between the two natural frequencies, thereby canceling out the effects of external factors such as ambient temperature. Furthermore, because the vibrator is placed in a vacuum, it is not affected by ambient temperature or humidity.

Each vibrator, fabricated using semiconductor process technology on a silicon wafer, is driven by a permanent magnet. When pressure is applied to the silicon diaphragm, the vibrator deforms, causing its resonant frequency to change.

Precise Needle Valve Control

The MC300 uses a needle valve servo mechanism in its pressure control section, adjusting airflow through the needle position to regulate output pressure. Unlike solenoid valve systems that rely on rapid open/close operations, the needle valve enables continuous, smooth movement. This design delivers stable pressurization and depressurization with minimal wear, ensuring long-term reliable operation

General specifications

• Display: 4.3-inch TFT color LCD
• Warm-up time: Within 5 minutes
• Operating temperature and humidity range:
• 5 to 40°C, 20 to 80% RH (non-condensing)
• Operating altitude range: 2000m or less
• Storage temperature range: -20 to 60°C (non-condensing)
• Power supply: 100 to 120V AC / 200 to 240V AC, 50/60Hz (rated)
• External dimensions: Approximately 213 mm (W) x 132 mm (H) x 400 mm (D) (excluding protrusions)
• Weight: Approximately 7.5 kg

Main pressure output specifications

• Accuracy: ±0.05% of full scale
• Relative Accuracy*1: ±0.04% of full scale
  *1 Relative value relative to Yokogawa's industrial measuring instruments
• Minimum Setting Resolution:
  -G01 (10kPa gauge pressure model): 0.001kPa
  -G03 (200kPa gauge pressure model): 0.01kPa
• Guaranteed Accuracy Range:
  -G01 (10kPa gauge pressure model): 0 to 10kPa
  -G03 (200kPa gauge pressure model): 0 to 200kPa
• Output Setting Range:
  -G01 (10kPa gauge pressure model): -0.12 kPa to 12 kPa
  -G03 (200 kPa gauge pressure model): -2.4 kPa to 240 kPa
• When -U2 is selected:
  Pa, hPa, kPa, MPa, mbar, bar, atm, mmHg,inHg gf/cm2, kgf/cm2, Torr, psi, mmH2O@4°C,mmH2O@20°C, ftH2O@4°C, ftH2O@20°C, inH2O@4°C,inH2O@20°C
• Supply pressure source:
  Dry air, temperature 5 to 40°C, minimal temperature fluctuation, use a pressure reducing valve with a filter, and input a stable supply pressure.