Circutor CVM-MINI SERIES

hamza özışıkApr 20, 2025

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Summary

1 BASIC INSTRUCTIONS

1.1 Checks on receipt

Procedure for verifying the equipment upon delivery to ensure it matches specifications and is undamaged.

1.2 Main features

Overview of the CVM-MINI's capabilities as a programmable measuring instrument for industrial systems.

1.3 Electrical parameters

Details the over 100 electrical parameters the CVM-MINI can display and communicate.

1.4 Other features

Highlights key features like compact size, TRMS measurement, energy counting, and RS485 communication.

1.5 Available models

Lists the different CVM-MINI models available with their respective codes and references.

2 INSTALLATION AND START-UP

2.1 Installation

Considers essential features before powering the equipment, ensuring proper installation.

2.1.1 Power supply voltage

Specifies the voltage requirements, tolerance, and consumption for the CVM-MINI power supply.

2.1.2 Maximum voltage in the voltage measurement circuit

Details the maximum permissible voltage for phase-neutral and phase-phase measurements.

2.1.3 Maximum permanent current in the current circuit

States the maximum continuous current ratings for IN/1A and IN/5A scales.

2.1.4 Transistor output features

Describes the specifications for the NPN transistor output, including voltage and current limits.

2.1.5 Temperature probe features

Provides details on the built-in temperature sensor accuracy, range, and its relation to ambient temperature.

2.1.6 Operating conditions

Defines the environmental parameters: operating temperature, relative humidity, and altitude.

2.1.7 Safety

Outlines safety standards (Category III, Class II) and protection against electric shock.

2.2 Start-up

Guidance on mounting the equipment and general notes before powering on.

2.2.1 Description of terminals

Detailed list of terminal functions for current inputs, voltage measurements, power supply, and communication.

2.2.2 Connection diagrams

Illustrations showing different connection configurations for voltage and current transformers.

3 OPERATING MODE

3.1 Keypad

Details the function of each of the seven silicon buttons on the keypad for operation and setup.

3.2 Default settings

Explains that factory default settings for display, communication, and measurement often require user configuration.

3.2.1 Default display

Illustrates the default screens showing various electrical parameters like voltage, current, and power.

4 SETTING SET-UP

LED Indicators

Explains the meaning of the CPU and COMM LEDs for indicating operational status and communication.

4.1 Measurement Set-up

Details how to access and modify measurement parameters like voltage, current ratios, and energy meters.

4.1.1 Transformation Ratios

Menu for changing voltage and current transformer ratios for primary and secondary values.

4.1.1.1 Voltage primary value

Procedure to set the primary voltage value for the voltage transformer.

4.1.1.2 Voltage secondary value

Procedure to set the secondary voltage value for the voltage transformer.

4.1.1.3 Current primary value

Procedure to set the primary current value for the current transformer.

4.1.1.4 Current secondary value

Procedure to select the current secondary scale, either IN/1A or IN/5A.

4.1.2 Measurement in 2 or 4 quadrants

Explains how to configure the analyzer for measuring power consumption only (2 quadrants) or consumption/generation (4 quadrants).

4.1.3 Power demand meter parameterisation

Configuration options for the power demand meter, including the integrated parameter and integration period.

4.1.3.1 Integrated parameter

Selection of the parameter (e.g., Active Power, Current) to be integrated for Maximum Demand calculation.

4.1.3.2 Integration period

Setting the time duration, from 1 to 60 minutes, for the power demand meter's integration period.

4.1.3.3 Clearing power demand meter value

Option to clear or save the maximum demand value recorded by the power demand meter.

4.1.4 Display and backlight

Configuration settings for the display, including screen selection and backlight.

4.1.4.1 Selection of screens to be displayed

Allows users to select which screens are displayed by default or create a personalized display.

4.1.4.2 Selection of start page

Procedure to choose the preferred screen that appears upon startup.

4.1.4.3 Backlight (Backlit display)

Setting the duration for which the backlight remains on after the last keypad use.

4.1.5 Clearing energy meter values

Option to clear the values of the consumed or imported energy meters (kWh).

4.1.6 Setting THd or d

Configuration for harmonic distortion measurements, choosing between effective (RMS) or fundamental values.

4.1.7 Digital output for the transistor (2)

Configuration of the digital transistor outputs for energy impulses or alarm conditions.

4.1.7.1 Impulse per n KW·h or Kvar-h consumed or generated

Setting energy meter codes to generate impulses for consumed or generated energy.

4.1.7.2 Alarm condition

Associating parameters with digital outputs for alarm conditions, including limits and delays.

4.2 Communication Set-up

Guides on connecting the CVM-MINI to computers or PLCs via RS-485 for automated control systems.

4.2.1 Default settings

Option to automatically select predefined communication parameters or use non-standard settings.

4.2.2 Peripheral number

Procedure to set the unique address (0-255) for each CVM-MINI instrument on the RS-485 bus.

4.2.3 Transmission speed

Selection of the RS485 communication baud rate from available options (1,200 to 19,200 bps).

4.2.4 Parity

Setting the parity type (even or odd) for data transmission error checking.

4.2.5 Data bits

Selection of the number of data bits for serial communication, either 7 or 8.

4.2.6 Stop bits

Selection of the number of stop bits for serial communication, either 1 or 2.

4.2.7 Protection of data Set-up using password

Enabling password protection for Measurement Set-up parameters to prevent unauthorized changes.

6 MODBUS RTU PROTOCOL

6.1 MODBUS memory map

Provides a detailed map of Modbus registers for reading electrical parameters, including instant and maximum values.

6.2 RS485 Connection diagram

Diagram illustrating the physical connection of the CVM-MINI via RS-485 to a PC, potentially through a converter.