CALIBRATION AND MAINTENANCE

UM344-2

6.1.1 Equipment Required

ŸMoore XTC Communicator (MXC) - refer to Section 2 of this User's Manual

ŸLaboratory grade digital multimeter (DMM); for calibrating the 4 to 20 mA output signal Voltmeter Section ............. Accuracy +/-0.01% of reading

Resolution 1.0 mV

Input impedance 10 MΩ

Ammeter Section .............. Accuracy +/-0.1% of reading

Resolution +/-1 μA

Shunt resistance 10Ω or less

Ÿ24 Vdc power supply; for bench calibration

ŸResistor 250Ω +/-1%, carbon, 1/4 watt; for bench calibration

ŸLaboratory grade precision microammeter with a resolution of +/-0.001 μA; used to calibrate Current Source.

ŸPrecision adjustable millivolt source, range to 110 mV. Used to check and calibrate mV/thermocouple inputs.

ŸDigital voltmeter to monitor the millivolt source with a resolution of +/- 0.001 mV for ranges up to 110 mV.

ŸPrecision resistance decade box; 5-dial type with largest dial providing 100 ohm steps. Accuracy to be +/-0.02 ohms. Used to simulate RTD/Ohm type input resistance.

ŸThermocouple reference tables providing millivolts vs. temperature data. Use to check accuracy of indicated temperature.

ŸRTD reference tables providing ohms vs. temperature data. Used to check accuracy of indicated temperature.

6.1.2 Transmitter Analog Output (DAC) Calibration

Perform the steps in the appropriate Section according to the transmitter's normal operating mode: analog operation, Section 6.1.2.1; digital operation, Section 6.1.2.2.

IMPORTANT

Calibration of the Digital-to-Analog Converter (DAC) is not normally required and should be performed only after all other options have been exhausted.

6.1.2.1 Transmitter Normally Configured for Analog Mode

If the transmitter is field mounted and conditions permit, calibration can be performed at the site as described in steps 2 through 18. If a bench calibration is desired, perform steps 1 through 18.

1.Bench Calibration only: Disconnect the transmitter from the process by performing the steps in Section 6.5.

6-2

September 1995

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Siemens UM344-2 user manual Equipment Required, Transmitter Analog Output DAC Calibration
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UM344-2 specifications

The Siemens UM344-2 is a cutting-edge industrial controller designed to meet the demands of modern automation and control systems. This powerful device is specifically developed for use in various applications, including manufacturing, process control, and machinery integration. The UM344-2 stands out for its versatility and robust performance in harsh industrial environments.

One of the main features of the Siemens UM344-2 is its high processing speed, which allows for real-time data processing and decision-making. The controller utilizes advanced microprocessor technology, ensuring quick response times and efficient operation. Its architecture supports multitasking, enabling it to manage multiple processes simultaneously without compromising performance.

The UM344-2 features a modular design, which provides flexibility in configuration and scalability. Users can easily add or remove modules to tailor the system to specific application requirements. This adaptability is beneficial for businesses that need to scale their operations or adjust to changing production demands. The controller is compatible with a variety of I/O modules, allowing for seamless integration with other equipment and systems.

In terms of connectivity, the Siemens UM344-2 supports various communication protocols, including Profibus, Profinet, and Ethernet. This versatility ensures smooth data exchange between the controller and other devices in the automation ecosystem, facilitating comprehensive monitoring and control. The inclusion of these communication standards enhances interoperability and allows for the integration of legacy systems with newer technology.

The Siemens UM344-2 is equipped with advanced diagnostic tools, which enable users to monitor system performance and detect potential issues in real-time. This feature reduces downtime and maintenance costs by allowing for proactive management of the system. The controller also supports remote access capabilities, enabling technicians to troubleshoot and configure systems from off-site locations.

Safety is a critical consideration in industrial environments, and the UM344-2 is designed with this in mind. It incorporates safety-certified features, ensuring compliance with international safety standards. Users can implement safety functions directly within the controller, streamlining system design and reducing the need for external safety components.

Overall, the Siemens UM344-2 exemplifies the fusion of technology and practical application, making it an essential component for businesses looking to enhance their automation processes. With its high performance, flexibility, and focus on safety, the UM344-2 is a reliable choice for industries aiming for efficiency and innovation in their operations.
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