1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the Rice Lake 720i Universal Indicator. The 720i is a programmable weight indicator/controller designed for industrial applications requiring batch formulation, inventory management, and traceability. It features a robust NEMA Type 4X/IP66 stainless steel enclosure and a user-friendly operator keypad.
Please read this manual thoroughly before operating the device to ensure proper function and safety.
2. Safety Information
Always observe the following safety precautions:
- Ensure the power supply (85-260VAC) matches the device requirements.
- Do not open the enclosure unless instructed by qualified personnel.
- Protect the device from extreme temperatures and moisture beyond its NEMA Type 4X/IP66 rating.
- Disconnect power before performing any maintenance or installation procedures.
3. Product Overview and Components
The Rice Lake 720i Universal Indicator is housed in a durable stainless steel enclosure, designed for harsh industrial environments. Key features include:
- Display: 5.3 in x 1.5 in LCD display for clear data visualization.
- Keypad: 22-key membrane panel with tactile feedback for precise input.
- Connectivity: Two full duplex serial ports for peripheral equipment integration.
- Internal Channels: Eight channels on the CPU board for versatile applications.
- Enclosure: NEMA Type 4X/IP66 rated stainless steel for protection against dust and water.
4. Setup and Installation
4.1 Unpacking
Carefully remove the 720i 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 indicator can be mounted in universal or panel-mount enclosure styles. Ensure the mounting surface is stable and capable of supporting the device's weight (approximately 9.5 pounds). Refer to the specific mounting kit instructions for detailed steps.
4.3 Electrical Connections
- Power Supply: Connect the indicator to an 85-260VAC power source. Ensure proper grounding.
- Load Cell Connections: Connect load cells to the appropriate terminals. The 720i supports eight channels on its CPU board.
- Serial Ports: Utilize the two full duplex serial ports for connecting peripheral devices such as printers, remote displays, or computers.
Caution: All electrical connections should be performed by a qualified technician to prevent damage to the unit or personal injury.
5. Operating Instructions
The 720i indicator features a 22-key membrane keypad for operation. The LCD display provides real-time data and operator prompts.
5.1 Basic Weighing
- Power On: Turn on the indicator. The display will show a self-test sequence, then the current weight.
- Zeroing: Press the ZERO button to set the display to zero when the scale is empty.
- Taring: Place an empty container on the scale. Press the TARA button to subtract the container's weight. The display will show zero.
- Weighing: Place the item to be weighed on the scale. The display will show the net weight.
5.2 Batching Operations
The 720i supports configurable batch engine or ProAction software for batching. Refer to the software manual for detailed programming instructions.
- Use the numeric keypad (0-9) and C (Clear) button for data entry.
- Follow on-screen prompts for entering batch parameters, such as "ENTER TRUCK ID" or "ACCEPT".
- The MENU button provides access to advanced settings and batch configurations.
5.3 Unit Switching
Press the UNID button to cycle through available weight units (e.g., pounds (lb), kilograms (kg), Newtons (N)).
6. Maintenance
6.1 Cleaning
The stainless steel enclosure can be cleaned with a damp cloth and mild detergent. Avoid abrasive cleaners or solvents that could damage the display or keypad membrane.
6.2 Calibration
Periodic calibration is essential for maintaining accuracy. Refer to the technical service manual or contact authorized service personnel for calibration procedures.
6.3 Inspection
Regularly inspect all cables and connections for wear or damage. Ensure the enclosure seals are intact to maintain the NEMA Type 4X/IP66 rating.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Indicator does not power on. | No power supply or faulty connection. | Check power cable and source. Ensure correct voltage (85-260VAC). |
| Inaccurate weight readings. | Needs calibration, damaged load cell, or unstable environment. | Perform calibration. Inspect load cells and connections. Ensure stable operating conditions. |
| Keypad not responding. | Keypad membrane damage or internal fault. | Clean keypad surface. If problem persists, contact technical support. |
| Display shows error message. | System error or overload. | Refer to the specific error code in the technical manual. Remove any overload. |
For issues not listed here, please contact Rice Lake technical support.
8. Specifications
- Model: 720i
- Part Number: 115448
- Enclosure: NEMA Type 4X/IP66, Stainless Steel
- Display: 5.3 in x 1.5 in LCD
- Keypad: 22-key membrane panel, tactile feel
- Serial Ports: 2 Full Duplex
- CPU Board Channels: 8
- Power Input: 85-260VAC
- Product Dimensions: 10.5 x 5.25 x 9.66 inches
- Item Weight: 9.5 Pounds
- Compliance: ROHS Compliant, NTEP
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or visit the official Rice Lake website. Technical support can be reached through the contact information available on the Rice Lake website.
Rice Lake Weighing Systems
www.ricelake.com
