Overview
The MT220 can measure pressure with outstanding accuracy, high resolution, minimal tempco, and excellent stability. It offers a wealth of functions for field calibration, including transmitter output measurement (DCV/DCA functions), 24 Volts DC output, percentage error readout, measurement data memory, and Ni-Cd battery operation. The D/A conversion output makes it simple to output data to a recorder or other equipment. And of course, data output through a GP-IB or RS-232 interface is also possible-including data output during operation on a 12 Volt DC power supply or Ni-Cd batteries.
 

• High accuracy: ±0.01%, with a maximum allowable input of 500kPa (130kPa range model).
• Measurement with DC Volts and DC Amps.
• 24 Volt DC output.
• Percentage reading.
• Error reading.
• Measurement data memory.
• D/A conversion output, comparator output, and external trigger input (Optional).
• GP-IB or RS-232 interfaces.
• 12 Volt DC power supply.
• Battery operation (optional).
• Std. Accessories: Connector for DC power supply, two rubber pads for rear foot, labels for indicating measurement object, one test lead, power cord and user's manual.

MT220 Series Datasheet (PDF)
(documents are in PDF format and will open in a new window)

High-Performance, and High-Efficiency Field Calibration

In electric power, gas, nuclear power, oil refineries, petrochemical and pharmaceutical plants, numerous sensors are used to measure such variables as pressure, temperature and flow rate, and to automate the process. These sensors must be calibrated periodically to maintain product quality. However, because there are typically so many pressure and differential pressure transmitters out in the field, the transmitters are usually calibrated in-situ. This calibration accounts for much of plant maintenance work. Efficiency is therefore crucial to maintain uptime of equipment and facilities.

The MY220 is a precision digital manometer for use with pressure/differential pressure transmitters and is designed to maximize the efficiency of field calibration work.
 

High Allowable Input Pressure

The maximum allowable input pressure is as high as 500kPa (such as in the 130kPa range model). Now you don't have to worry about sensor breakdown due to overrange pressure input.
 

Functions Tailored to Your Calibration Work

Calibration involves inputting the same pressure level to both a calibrator and a transmitter and comparing the transmitter output with a value measured by the calibrator. The MT220 comes with all the functions you need for such calibration work in the plant or field. Practical functions include measuring transmitter output (1 to 5V or 4 to 20mA), outputting 24 Volts DC for driving the transmitter, and indicating the transmitter output error as a percentage value. The MT220 even has a pressure range pre-adjusted to that of transmitters.
 

Full Support for Higher Accuracy of Pressure, and Differential Pressure Transmitters

The accuracy of pressure/differential pressure transmitters has continued to improve, from ±0.25% to ±0.1%, and now to ±0.075%. That means the accuracy and stability of the manometers used to calibrate these transmitters must keep pace.

The MT220 employs Yokogawa's original silicon resonant sensor, a high precision pressure sensing device. They have also set up an advanced calibration environment, including a tightly-controlled traceability system. As a result, their calibrators feature a basic accuracy as high as ±0.02%, and excellent stability. With the MT220, you can verify the performance of even the most accurate of pressure/differential pressure transmitters, i.e. ±0.075%.

Automation of Pressure Measurement

Yokogawa Traceability System for Ensuring Top Reliability of Pressure
measurement by customers

The company is committed to controlling and maintaining the accuracy of standards installed in the Standards Room of its Kofu plant.
 

Front Panel

• Pressure unit selector key
  Used to select from up to seven units; factory set to kPa. (The units other than kPa are extralegal measurement units prescribed by the Measurement Law).
• LCD for 5.5-digit readings (pressure measurement) and 4.5-digit readings (measurement with DCV and DCA functions); 4.5-digit and 3.5-digit readings, respectively, for MT220 Model 767305.
  The EL-backlight LCD presents a clear, sharp view even in dark places.
• Relative key
  Shows the deviation from a specified pressure measurement.
• Zero calibration key
  Adjusts the zero reading to the atmospheric pressure or vacuum.
• DCV/DCA function keys
  Turn on or off the DCV/DCA functions, or toggle between the functions.
• 24V DC output ON/OFF key and terminals
  Used as a power supply for operating a transmitter during field calibration work.
• Percent input readout keys
  ▫ Pressure: Can be displayed as a percentage with reference to your desired full scale set point. In addition you
  can define selected pressure readings as the upper and lower limits of a full scale.
  ▫ Volt and ampere DC: Can be displayed as a percentage by defining the 1 - 5V or 4 - 20mA range as the
  0 - 100% range.
• Error readout key (% ERROR function)
  Shows an error in the volt-DC or ampere-DC reading of a pressure measurement (transmitter output) as a percentage value.
• Readout digits selector key
  Turns off LSD of a pressure reading from the display to avoid difficulty in reading the value due to fluctuations in the LSD.
• Parameter setting key
  Sets the measurement conditions, communication interface, etc.
• Data storage keys
  Up to 2,000 data items can be stored in the internal memory.
• Pressure input connection
  You can choose from three choices of connector configuration. The same connection is found on the rear panel.
• DCV/DCA measurement terminals
  Greatly help reduce the field calibration work required for pressure/differential pressure transmitters. The current (A) terminal is protected by a built-in fuse against overrange input levels.

Rear Panel

Silicon-Resonant Sensor

Overall structural view of the Yokogawa original silicon resonant sensor*, a major factor in the high performance of the MT210/MT210F series.

Note*: Technology that has won the Ohkochi Grand Technology Prize and the Chairman's Award of the Japan Federation of Economic Organizations (Keidanren).

Major users of YOKOGAWA digital manometers

National standards institutions in Japan and abroad; institutions related to nuclear power generation; national and public research institutions; electric-power companies; automakers and their affiliates; electric appliance manufacturers; precision instrument manufacturers; semiconductor and electronic component mfg's; pharmaceutical mfg's; Heavy electrical machinery builders; oil refinery and petrochemical companies.