1. Introduction
The Circutor DHC-96 mVdc Digital Voltmeter Shunt (Model M22348.) is a sophisticated digital instrument panel designed for precise monitoring, regulation, and control of electrical variants and process signals. This device is capable of displaying measured electrical values or proportional values of process signals, making it suitable for a wide range of industrial and climate solar installations.
Key features include:
- High accuracy in measurement.
- Programmable measurement input.
- Integrated relay output for control and alarm functions.
- Universal power supply compatibility (80-270 Vca/cc and 16-36 VCC).
- Frontal IP 54 protection for enhanced durability.
- Galvanic insulation between external circuits.
- Self-configurable decimal point.
- Designed for panel installation (96 x 49 mm).
Figure 1: Front view of the Circutor DHC-96 mVdc Digital Voltmeter Shunt, showing its digital display and control buttons.
2. Setup and Installation
Proper installation is crucial for the optimal performance and longevity of your DHC-96 device. Ensure all power sources are disconnected before proceeding with installation.
2.1 Panel Mounting
- Prepare a panel cutout with dimensions of 96 x 49 mm.
- Insert the DHC-96 unit into the cutout from the front.
- Secure the unit using the provided mounting clips or brackets from the rear of the panel. Ensure a snug fit to maintain the IP 54 frontal protection rating.
2.2 Power Supply Connection
The DHC-96 supports a universal power supply. Connect the power source to the designated terminals on the rear of the unit.
- For AC/DC power, connect to 80-270 Vca/cc terminals.
- For DC power, connect to 16-36 VCC terminals.
- Ensure correct polarity for DC connections.
2.3 Measurement Input Connection
Connect the signal source to the programmable measurement input terminals. Refer to the wiring diagram provided with your specific model for detailed connection points.
- For voltage measurements, connect the voltage source.
- For current measurements, connect through a shunt or current transformer as appropriate for your application.
- Ensure galvanic insulation between external circuits is maintained.
2.4 Relay Output Connection
The DHC-96 features two output relays for control and alarm functions. Connect these relays to your external control systems or alarm indicators as required.
- Identify the relay output terminals.
- Wire the relays according to your application's control logic.
- Configure alarm delays and interlocking settings via the device's menu.
3. Operating Instructions
Once installed and powered, the DHC-96 is ready for operation. The front panel features a digital display and control buttons for configuration and monitoring.
3.1 Display Overview
The digital display shows the measured electrical variant (e.g., voltage, current, frequency) or the proportional value of a process signal. The unit automatically adjusts the display based on the configured measurement type.
- DC Systems: Capable of measuring voltage, current, frequency, and other industrial process variables.
- AC Models: Perform measurements in True Effective Value (TRMS).
- Decimal Point: The decimal point is self-configurable to suit your measurement precision requirements.
3.2 Button Functions
The front panel buttons allow for navigation through menus, parameter configuration, and display adjustments. Specific button functions may vary slightly depending on the firmware version.
- Left/Right Arrows (< / >): Typically used for navigating through menu options or adjusting values.
- Up/Down Arrows (∧ / ∨): Used for increasing/decreasing values or selecting options.
- Menu/Enter Button: Used to access the main menu, confirm selections, or save settings.
- Escape/Back Button: Used to exit a menu or cancel an operation.
3.3 Configuration and Programming
The DHC-96 allows for programming various parameters to suit specific application needs. This includes setting the measurement input type, configuring alarm thresholds, and defining relay behaviors.
- Access the configuration menu by pressing the Menu/Enter button.
- Navigate through the menu options using the arrow buttons.
- Select the desired parameter to modify and adjust its value.
- Save changes before exiting the menu.
- Refer to the detailed programming guide (if available separately) for advanced configurations.
4. Maintenance
The DHC-96 is designed for reliable operation with minimal maintenance. Regular inspection and cleaning will help ensure its continued performance.
- Cleaning: Periodically clean the front panel with a soft, damp cloth. Do not use abrasive cleaners or solvents, as they may damage the display or casing.
- Inspection: Regularly inspect the wiring connections for any signs of wear, corrosion, or looseness. Ensure the unit is securely mounted in its panel cutout.
- Environment: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent damage. The IP 54 frontal protection helps against dust and splashing water, but the unit is not designed for immersion.
- No User-Serviceable Parts: The DHC-96 contains no user-serviceable parts. Do not attempt to open the casing, as this will void the warranty and may expose you to electrical hazards.
5. Troubleshooting
If you encounter issues with your DHC-96, refer to the following common troubleshooting steps. For problems not listed here, contact Circutor technical support.
- No Display/Power:
- Check the power supply connections to ensure they are secure and correctly wired.
- Verify that the power source voltage is within the specified range (80-270 Vca/cc or 16-36 VCC).
- Check for any tripped circuit breakers or blown fuses in the power circuit.
- Incorrect Readings:
- Ensure the measurement input is correctly connected and the signal source is active.
- Verify that the device's measurement input type is correctly configured in the settings to match your application (e.g., voltage, current, process signal).
- Check for any external interference or noise affecting the signal.
- Confirm the decimal point setting is appropriate for the expected values.
- Relay Not Activating:
- Check the relay output wiring for proper connection to the external control system.
- Verify the alarm thresholds and relay logic are correctly configured in the device's settings.
- Ensure the measured value has exceeded or fallen below the set alarm threshold.
- Check for any configured alarm delays or interlocking conditions that might prevent immediate activation.
6. Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Circutor |
| Part Number | M22348. |
| Item Model Number | M22348. |
| Product Dimensions | 3.01 x 1.93 x 3.78 inches |
| Item Weight | 7 ounces |
| Color | Black |
| Style | Cir |
| Power Source | Electric |
| Item Package Quantity | 1 |
| Batteries Required? | No |
| ASIN | B08WL8FMDB |
| Date First Available | August 15, 2023 |
7. Warranty and Support
For detailed warranty information, please refer to the warranty card included with your product or visit the official Circutor website. Warranty terms and conditions may vary by region and product.
For technical support, service, or inquiries regarding your DHC-96 mVdc Digital Voltmeter Shunt, please contact Circutor customer service or your authorized dealer. Provide your product model number (M22348.) and serial number (if applicable) when seeking support.
You can find more information and contact details on the official Circutor website: www.circutor.com
