Pressure Calibrator CA700 YOKOGAWA

Pressure Calibrator CA700 YOKOGAWA

The new Yokogawa CA700 Portable Pressure Calibrator is equipped with a silicon resonant sensor that uses Yokogawa proprietary DPHARP technology. The CA700 can measure pressures with an accuracy that is within ±0.01% of rdg*, making it one of the most accurate portable pressure calibrators on the market. This highly accurate portable pressure calibrator features a variety of functions that includes a wide selection of measuring ranges, as found/as left data storage, and memory capacity to store calibration procedures. The Yokogawa CA700 provides an accurate and efficient calibration and verification tool for pressure/differential pressure transmitters and other types of field devices for commissioning or regular inspection.

What is Pressure Calibrator

Pressure calibrators come in a wide variety. A pressure calibrator is simply a pressure measuring device capable of verifying (or calibrating) the pressure reading of another pressure measuring device. These devices might also be called pressure standards. The pressure calibrator must be more accurate than the device being calibrated. Traditionally, the calibration ratio is 4:1. This means that the pressure calibrator is 4 times more accurate than the device it is calibrating.

A pressure calibrator can also have secondary features that facilitate the calibration. For example, a pressure calibrator may have the capability to measure the output from the device under test (DUT). It might also have an internal pump capable of generating pressures used in the calibration, or it could have a precision regulator that can control a supply pressure and maintain a precise pressure output. Pressure Calibrator is a widely used term that can mean a lot of different things to a lot of different people.

Applications

1- Field Calibration of Differential Pressure and Pressure Transmitters

Calibration of pressure transmitters is required to accurately measure the input and output values and to calculate the error rate.
The CA700 ensures reliable calibration with its function to accurately measure the input and output values of pressure and current.
Additionally, its embedded calibration procedures enable users to perform certain calibration following the prescribed procedure.

2-Pressure Switch Test

A pressure switch test measures the pressure at the time when the contact opens and closes and the resistance at the time when the dead band contact closes.
A test procedure is embedded to enable users to carry out a test following the prescribed procedure.

3-Check and I/O Adjustment of an Electro-pneumatic Converter

Input and output adjustment of an electro-pneumatic converter is carried out by applying rising and falling currents of 0, 25, 50, 75, and 100% of the span.
A reliable test can be carried out with the CA700 that has a 4-20 mA step function for signal generation and a capability to accurately measure the generated pressure.

4-20 mA SIMULATE (Two-wire Transmitter Simulator)

The CA700 can also be used as a transmitter simulator to carry out a loop test. It can absorb (SINK) the set current from an external voltage generating device (e.g., a distributor system or PLC) of instrumentation equipment.
4-20mA current can be sourced with an accuracy of 0.015% of the reading.

5-Two-wire Transmitter Loop Check

DC mA signals can be measured by supplying power to the transmitter from a 24 V DC power supply.
DC mA signal measurement and zero-point check can be performed with an accuracy of 0.015% of the reading.
A 250-ohm resistor for HART and BRAIN communication is included in this calibrator so there is no need to attach an external resistor when connecting to a handy terminal.

6-Input Command Check and Adjustment of Recorders and Controllers

Instrumentation loop test and operation/command check can be performed by sourcing DC 1-5 V / 4-20 mA instrumentation signals with an accuracy of 0.015% of the reading. Furthermore, two patterns of linear sweep and step sweep can be selected (the sweep time can be specified from 15, 30, 45, and 60 sec).

Features

High Accuracy and Long Stability

• Achieves the highest accuracy in the portable class
• Basic accuracy:
  • Pressure (measurement) / 0.01% rdg.
  • Current/voltage (source/measurement) / 0.015% rdg.

Rangeability

• Achieves the highest resolution and widest range in the portable class
• 001 kPa (200.000 kPa range)

User Support

• Strong support for field calibration and maintenance work
• Calibration procedures of pressure transmitters and pressure switches are embedded.
• “As Found” , “As Left” data and error rate (%) can be recorded.

Field Use

• IP54 dustproof and waterproof robust case enables use in harsh environments.

Accessories

• Three high-performance hand pump models for different pressure ranges are available.

Data Sheet