1. Introduction
The Selec PIC101A is a micro-controller based 4-digit process indicator designed for precise measurement and display of various industrial process parameters. This device accepts multiple input types and features two programmable setpoints with individual relays for control applications. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your PIC101A Digital Process Indicator.
2. Product Overview
The PIC101A is engineered for reliability and ease of use in industrial environments. Key features include:
- Display: A clear 4-digit, 7-segment digital display for process value indication.
- Control Keys: Three intuitive keys for digital setting and configuration.
- Input Versatility: Supports multiple input types including Voltage (0-10V DC) and Current (0-20mA & 4-20mA DC).
- Programmable Setpoints: Two independent setpoints with individual relay outputs for process control.
This image displays the front panel of the Selec PIC101A Digital Process Indicator. It features a black casing with the 'Selec' logo on the left and 'PIC101' on the right. The central element is a bright red 4-digit, 7-segment LED display, currently showing '101.0'. Below the display are three orange push-buttons: a square button on the left, a downward-pointing triangle in the middle, and an upward-pointing triangle on the right. These buttons are used for configuration and operation.
3. Specifications
| Parameter | Specification |
|---|---|
| Display | 4-digit, 7-segment digital display |
| Keys | 3 keys for digital setting |
| Input Type (PIC101A-VI-230) | Voltage: 0 - 10V DC; Current: 0 - 20mA & 4- 20mA DC |
| Sampling Time | 250 ms |
| Input Filter (FTC) | 0.2 to 9.9 sec |
| Resolution | Decimal point position selectable: 1/0.1/0.01/0.002 |
| Operating Temperature | 0°C to 50°C (32°F to 122°F) |
| Storage Temperature | -20°C to 75°C (-4°F to 167°F) |
| Humidity (non-condensing) | 95% RH |
| Supply Voltage | 230V AC ± 20%, 50/60 Hz |
| Power Consumption | 5VA max @230V AC |
| Indication Accuracy (PIC101A-VI-230) | ±0.5% of F.S., ±1 digit (F.S. = Full Scale) |
4. Setup and Installation
Proper installation is crucial for the accurate and safe operation of the PIC101A. Always ensure power is disconnected before beginning installation.
4.1 Safety Precautions
- Ensure all wiring is performed by qualified personnel.
- Verify correct voltage and current ratings before connecting power.
- Avoid installing the device in areas with excessive vibration, moisture, or extreme temperatures outside the specified operating range.
- Ensure adequate ventilation around the unit.
4.2 Mounting
The PIC101A is designed for panel mounting. Cut a suitable opening in the control panel according to the device's dimensions. Secure the unit using the provided mounting clamps.
4.3 Wiring
Refer to the wiring diagram provided with the product packaging for specific terminal connections. General wiring guidelines:
- Power Supply: Connect the 230V AC supply to the designated power terminals.
- Input Signal: Connect your process sensor (voltage or current output) to the appropriate input terminals. Ensure correct polarity for DC signals.
- Relay Outputs: Connect control circuitry to the relay output terminals. Note that these are potential-free contacts.
- Ensure all connections are tight and secure to prevent intermittent operation or damage.
5. Operating Instructions
Once installed and wired, the PIC101A is ready for operation. The device's functions are controlled via the three front panel keys.
5.1 Power On
Apply power to the unit. The display will illuminate and show the current process value after a brief self-test sequence.
5.2 Reading the Display
The 4-digit display shows the measured process value. The decimal point position can be configured as per the resolution setting.
5.3 Setting Parameters
The three keys (typically 'Set', 'Up', 'Down' or similar functions) are used to navigate menus and adjust parameters such as:
- Input Type: Select between voltage or current inputs.
- Scaling: Adjust the display range to match your sensor's output and desired engineering units.
- Decimal Point: Configure the position of the decimal point.
- Setpoints: Program the two independent setpoint values for relay activation.
- Hysteresis: Set the hysteresis for relay operation to prevent rapid switching.
- Input Filter: Adjust the filter time constant to stabilize readings in noisy environments.
Consult the detailed programming guide (usually supplied with the product) for specific menu structures and parameter adjustment procedures.
6. Maintenance
The Selec PIC101A is designed for minimal maintenance. Regular checks can help ensure its longevity and accurate performance.
6.1 Cleaning
Clean the front panel with a soft, damp cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the display or casing. Ensure no liquid enters the device.
6.2 Environmental Conditions
Ensure the operating environment remains within the specified temperature and humidity ranges. Excessive dust or corrosive atmospheres can affect performance over time.
6.3 Internal Components
The device contains no user-serviceable parts. Do not attempt to open or repair the unit, as this will void the warranty and may expose you to electrical hazards.
7. Troubleshooting
If you encounter issues with your PIC101A, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or off | No power supply; Incorrect wiring; Blown fuse (internal) | Check power connections and voltage. Verify wiring. If fuse is suspected, contact support. |
| Incorrect or fluctuating readings | Incorrect input type setting; Sensor malfunction; Loose input wiring; Electrical noise; Incorrect scaling | Verify input type setting. Check sensor operation. Inspect input wiring. Increase input filter (FTC) setting. Re-check scaling parameters. |
| Relay not activating | Setpoint not met; Incorrect setpoint value; Hysteresis setting too wide; Relay output wiring issue; Relay malfunction | Verify process value relative to setpoint. Check setpoint and hysteresis settings. Inspect relay output wiring. If relay is faulty, contact support. |
| Keys unresponsive | Temporary software glitch; Physical damage to keys | Cycle power to the unit. If problem persists, contact support. |
If the problem persists after attempting these solutions, please contact customer support for further assistance.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact your authorized Selec distributor or reseller. Ensure you have your product model number (PIC101A) and purchase details available when contacting support.
For additional resources and product information, you may visit the official Selec website or contact Instrukart Holdings, the seller, for assistance.
