• Dot matrix LCD (320x240 dots) display
• Accuracy of 0.01 reading on pressure measurement
• 0.015 reading on Current/Voltage source/measurement

Strong support for field calibration and maintenance work

Calibration procedures for differential pressure and pressure transmitters are embedded, so routinely used as 50-percent step, up-and-down, 5-point calibration and 25-percent step, up-and-down, as well as 9-point calibration can be performed right out of the box. Calibration operation can be sped up by following the navigation instructions, resulting in increased efficiency of field work. Measurement data is automatically recorded to the calibrator so it can be saved to a USB memory stick or transferred to a PC as text data using a USB cable. Input and output values, error rate, date and time, and pass or fail can be displayed on a PC monitor.

IP54 waterproof and dustproof robust case

Calibration of pressure transmitters is usually carried out in harsh environ- ments where there are many pipes and handrails or in wet areas. The CA700 has a robust case designed according to the IP54 waterproof and dustproof standards. A shoulder strap can be attached to the calibrator to make it easy to carry around in the field. In addition, an easy-to-read LCD and tilt stand suitable for outdoor work exposed to direct sunlight extend the range of use of this calibrator from indoor bench use to outdoor field use.

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.

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.

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.

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.

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.

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).