1. Introduction
This manual provides detailed instructions for the Pomya Current Signal Generator (Model Pomyawc7sje90r3). This device is designed to generate precise 0-20mA, 4-20mA, and 0-22mA analog output signals, making it suitable for various industrial applications such as valve adjustment, frequency control, PLC debugging, panel meter calibration, and LED testing. It features a 4-digit display for intuitive control and robust electrical protection for reliable operation.
2. Product Overview
The Pomya Current Signal Generator is a compact and lightweight tool equipped with a bright 4-digit display and three tactile buttons for easy operation. The device's design prioritizes ease of installation and use in industrial environments.
Figure 2.1: Front view of the Pomya Current Signal Generator. This image shows the front panel of the signal generator, featuring the 4-digit LED display and three control buttons labeled '+', '-', and 'OK'. The model number 'ZYX-HOD-1AO-020MA-K' is visible below the display.
Figure 2.2: Front and back view of the Pomya Current Signal Generator. This image displays both the front and rear of the signal generator. The front shows the display and control buttons, while the back reveals the removable green terminal block with clearly marked connections for V+, V-, OUT+, and OUT-.
3. Specifications
| Feature | Description |
|---|---|
| Sampling Channel | 1 analog output channel (0-20mA, 4-20mA, 0-22mA signals) |
| Power Supply | 15-28V DC with anti-reverse connection design |
| Product Accuracy | 0.01mA adjustment accuracy, 0.01mA display accuracy |
| Display Interface | 4-digit digital tube (high brightness), switchable among actual current, percentage, and Hz |
| Adjustment | 3 durable touch buttons for output values and parameter settings |
| Working Temperature | -10 to 60°C |
| Working Humidity | Less than 80% |
| Item Weight | 56 g |
| Parcel Dimensions | 8 x 6 x 5 cm |
| Model Number | Pomyawc7sje90r3 |
| Measurement Accuracy | +/-0.5% |
4. Setup
Proper connection of the current signal generator is crucial for safe and accurate operation. The device operates on a 15-28V DC power supply and includes anti-reverse connection protection. Refer to the wiring diagram below for correct power and signal connections.
Figure 4.1: Wiring Diagram for Pomya Current Signal Generator. This diagram illustrates two connection methods: Three-Wire and Four-Wire. The Three-Wire method shows V+, V-, OUT+, and OUT- connections, with a note indicating a common ground for V- and OUT-. The Four-Wire method demonstrates connecting the generator to a frequency converter, servo, or flowing valve, using a sampling resistor in the circuit. Ensure V+ is connected to the positive power supply, V- to the negative power supply, OUT+ to the signal positive, and OUT- to the signal negative.
Connection Terminals:
- V+: Power Supply Positive
- V-: Power Supply Negative
- OUT+: Signal Positive
- OUT-: Signal Negative
5. Operating Instructions
The generator features a 4-digit display and three buttons for adjusting output values and setting parameters. The display can switch between actual current (mA), percentage (%), and frequency (Hz) readings.
- Power On/Off: Connect the device to a 15-28V DC power supply. The display will illuminate. Disconnect power to turn off.
- Adjusting Output: Use the '+' and '-' buttons to increase or decrease the output current value. The adjustment accuracy is 0.01mA.
- Setting Parameters/Switching Display Modes: Press the 'OK' button to cycle through display modes (mA, %, Hz) or to enter parameter setting menus (refer to the full product manual for advanced parameter settings).
- Output Range: The device supports 0-20mA, 4-20mA, and 0-22mA output ranges.
6. Maintenance
To ensure continued accuracy and longevity of your Pomya Current Signal Generator, follow these maintenance guidelines:
- Calibration: The device includes a current and voltage display calibration potentiometer. This allows users to calibrate the display value to match the full-scale value of the controlled equipment, maintaining measurement accuracy over time. Refer to the calibration section in the full product manual for detailed steps.
- Cleaning: Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the generator in a dry environment within the recommended temperature range of -10 to 60°C when not in use.
7. Troubleshooting
This section provides solutions to common issues you might encounter with your current signal generator.
- No Display/Power: Ensure the 15-28V DC power supply is correctly connected and functional. Check for proper polarity; the device has anti-reverse connection protection, but incorrect wiring should still be avoided.
- Incorrect Output: Verify all wiring connections according to the diagram in Section 4. If the output seems inaccurate, perform a calibration using the built-in potentiometer as described in the Maintenance section.
- Unstable Signal: Ensure the power supply is stable and within the specified voltage range. Check for any loose connections.
- Device Not Responding: Disconnect and reconnect the power supply. If the issue persists, contact customer support.
8. Warranty and Support
This Pomya Current Signal Generator is covered by a standard manufacturer's warranty. For warranty claims, technical support, or service inquiries, please contact your retailer or visit the official Pomya website. Please have your model number (Pomyawc7sje90r3) and purchase information ready when contacting support.