1. Introduction
This user manual provides detailed instructions for the installation, operation, and maintenance of the Rice Lake 720i-A2 Programmable Indicator. The 720i-A2 is a versatile weight indicator and controller designed for industrial applications, capable of automating systems, managing inventory, and capturing precise weight data. Please read this manual thoroughly before operating the device to ensure safe and efficient use.
2. Product Overview and Features
The Rice Lake 720i-A2 is a robust programmable indicator built for demanding industrial environments. It features a comprehensive operator keypad and an LCD display for clear data presentation and user interaction.
Figure 1: Rice Lake 720i-A2 Programmable Indicator
This image displays the front panel of the Rice Lake 720i-A2 indicator. The large LCD screen shows '720i' prominently, along with 'ENTER TRUCK ID-1234' and 'ACCEPT-1234'. Below the screen is a keypad with numerical buttons (0-9), function keys (F1-F4), and dedicated buttons for 'ZERO', 'TARA', 'MENU', 'UNID.' (Units), 'IMP/L' (Print/Label), and 'BAL' (Balance). The unit is housed in a stainless steel enclosure, indicating its durability for industrial use. Connection points are visible at the bottom of the unit.
Key Features:
- NEMA Type 4X/IP66 rated stainless steel enclosure for harsh environments.
- 5.3 inch x 1.5 inch LCD Display for clear readability.
- Two full duplex serial ports for enhanced connectivity.
- Eight channels on the CPU board for versatile system integration.
- 22-key membrane panel with tactile feedback for reliable operation.
- Programmable soft keys and operator prompts for customized control.
- Supports configurable batch engine or ProAction software for programming.
- Local remote capability allows multiple indicators to display the same data.
3. Safety Information
Always observe the following safety precautions to prevent injury and ensure proper operation of the 720i-A2 indicator:
- Ensure the power supply matches the specified voltage (115V-AC).
- Do not open the enclosure unless instructed by qualified personnel.
- Disconnect power before performing any maintenance or installation procedures.
- Avoid exposing the unit to extreme temperatures or corrosive substances beyond its NEMA 4X/IP66 rating.
- Only use approved accessories and replacement parts.
4. Setup and Installation
4.1 Unpacking
Carefully remove the indicator from its packaging. Inspect for any signs of damage during transit. Retain all packaging materials for future transport or storage.
4.2 Mounting
The 720i-A2 can be mounted in universal or panel-mount configurations. Ensure the mounting surface is stable and capable of supporting the unit's weight (approximately 9.5 lbs). Refer to the detailed mounting instructions provided in the separate installation guide for specific dimensions and procedures.
4.3 Electrical Connections
Connect the indicator to a 115V-AC power source. Ensure all connections are secure and comply with local electrical codes. The unit features two full duplex serial ports for connecting to peripheral equipment such as printers, computers, or other indicators. Consult the wiring diagrams in the full technical manual for detailed connection instructions for load cells and other devices.
5. Operating Instructions
5.1 Power On/Off
To power on the unit, connect it to the 115V-AC power supply. The LCD will illuminate, and the system will perform a self-test. To power off, disconnect the power supply.
5.2 Basic Weighing Operations
- Zeroing: Press the ZERO button to set the display to zero when the scale is empty.
- Taring: Place an empty container on the scale and press the TARA button. The display will show zero, allowing you to weigh the net contents.
- Unit Selection: Use the UNID. button to cycle through available weight units (e.g., pounds, kilograms).
5.3 Advanced Functions
The 720i-A2 supports advanced functions such as batch formulation, inventory management, and data collection. These functions are accessed and configured via the MENU button and programmable soft keys (F1-F4). Detailed programming and operational procedures for these advanced features are covered in the comprehensive programming manual and ProAction software documentation.
- Batching: Configure batch recipes and control material flow using the configurable batch engine.
- Data Management: Capture and store weight data, truck IDs, and other relevant information.
- Networking: Utilize the serial ports for integration into larger control systems or for local remote display capabilities.
6. Maintenance
6.1 Cleaning
Clean the exterior of the indicator with a soft, damp cloth. For stubborn dirt, use a mild, non-abrasive detergent. Do not use harsh chemicals or abrasive materials, as they may damage the stainless steel enclosure or the display.
6.2 Calibration
Periodic calibration may be required to maintain accuracy. Calibration procedures should only be performed by qualified service technicians. Refer to the service manual for detailed calibration instructions.
7. Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact Rice Lake technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Indicator does not power on | No power supply; incorrect voltage; faulty power cable | Check power connection; verify voltage (115V-AC); replace power cable if damaged. |
| Inaccurate weight readings | Scale not zeroed; calibration required; damaged load cell | Press ZERO button; perform calibration (contact service); inspect load cell connections. |
| Display shows error message | System fault; overload condition | Refer to the full technical manual for error code definitions; remove excess load from scale. |
8. Specifications
| Specification | Value |
|---|---|
| Model | 720i-A2 |
| Product Dimensions | 10.5 x 5.25 x 9.66 inches |
| Item Weight | 9.5 Pounds |
| Manufacturer | Rice Lake |
| Voltage | 115 Volts AC |
| Display Type | LCD |
| Enclosure Rating | NEMA Type 4X/IP66, Stainless Steel |
| Serial Ports | 2 Full Duplex |
9. Warranty and Support
The Rice Lake 720i-A2 Programmable Indicator is covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Rice Lake website.
For technical support, service, or to order replacement parts, please contact Rice Lake customer service or an authorized Rice Lake dealer. Contact information can typically be found on the manufacturer's website or in your product documentation.
