1. Introduction
The CAS PR-II Bench 30kg Digital Price Computing Weighing Scale is designed for accurate and efficient weighing and price calculation in retail environments. It features a dual LED display for clear visibility by both operator and customer, a durable stainless steel pan, and a rechargeable battery for portable use. This manual provides essential information for the proper setup, operation, and maintenance of your weighing scale.
2. Safety Information
- Place the scale on a stable, level, and vibration-free surface to ensure accurate readings.
- Avoid exposing the scale to direct sunlight, extreme temperatures, high humidity, or dust.
- Do not immerse the scale in water or use abrasive cleaners. Use a soft, damp cloth for cleaning.
- Ensure the power adapter is correctly connected to a suitable power outlet.
- Do not overload the scale beyond its maximum capacity of 30kg.
- Keep out of reach of children.
3. Package Contents
Verify that all items are present in the package:
- CAS PR-II Bench 30kg Digital Price Computing Weighing Scale Unit
- Stainless Steel Weighing Pan (330x235mm)
- AC Power Adapter
- User Manual
4. Product Overview
Familiarize yourself with the main components of your CAS PR-II weighing scale.

Figure 4.1: Top view of the CAS PR-II Bench Scale, highlighting the dual LED display and keypad with Direct PLU buttons.

Figure 4.2: Bottom view of the CAS PR-II Bench Scale, showing the power supply input, ON/OFF switch, battery compartment, RS-232S port, and USB port.
Key Components:
- Weighing Pan: Stainless steel platform for placing items to be weighed.
- Dual LED Display: Shows Weight, Unit Price, and Total Price for both operator and customer.
- Keypad: Numeric keys for price entry, function keys (Tare, Zero, PLU, etc.).
- ON/OFF Switch: Located on the underside of the scale.
- Power Input: For connecting the AC adapter.
- Battery Compartment: Houses the rechargeable 6V/4Ah battery.
- USB Port (Optional): For communication and power.
- RS-232S Port (Optional): For serial communication.
5. Setup
- Unpack the Scale: Carefully remove all components from the packaging.
- Position the Scale: Place the scale on a firm, level, and stable surface. Ensure there are no obstructions or vibrations that could affect accuracy.
- Install Weighing Pan: Gently place the stainless steel weighing pan onto the scale platform.
- Connect Power:
- Connect the AC power adapter to the power input port on the scale (refer to Figure 4.2).
- Plug the adapter into a suitable electrical outlet. The internal rechargeable battery will begin charging. Allow sufficient time for the battery to fully charge before initial wireless use (typically 12 hours).
- Power On: Locate the ON/OFF switch on the underside of the scale (refer to Figure 4.2) and switch it to the 'ON' position. The display will illuminate.
6. Operating Instructions
6.1 Basic Weighing
- Ensure the scale is powered on and the display shows '0.000' (or similar zero indication). If not, press the 'ZERO' key.
- Place the item to be weighed directly onto the center of the stainless steel pan.
- Read the weight displayed in the 'WEIGHT' section of the LED display.
6.2 Tare Function
The Tare function allows you to subtract the weight of a container, so only the net weight of the contents is measured.
- Place the empty container onto the weighing pan. The display will show its weight.
- Press the 'TARE' key. The display will reset to '0.000', indicating the container's weight has been tared out.
- Place the items into the container. The display will now show only the net weight of the items.
- To clear the tare, remove the container and press the 'TARE' key again.
6.3 Price Computing
This function calculates the total price based on the weighed item and its unit price.
- Weigh the item as described in '6.1 Basic Weighing'. The weight will be displayed.
- Using the numeric keypad, enter the unit price (e.g., price per kg). The unit price will appear in the 'UNIT PRICE' section of the display.
- The 'TOTAL PRICE' section of the display will automatically calculate and show the total cost (Weight × Unit Price).
6.4 Direct PLU Memory Functions (M1-M7)
The scale features up to 7 Direct PLU (Price Look-Up) memory functions to store frequently used unit prices.

Figure 6.1: Keypad detail showing M1-M7 PLU buttons.
To Store a Unit Price:
- Enter the desired unit price using the numeric keypad.
- Press the 'Fn' (Function) key, then press the desired 'M' key (M1-M7) to save the price.
To Recall a Stored Unit Price:
- With an item on the scale, simply press the desired 'M' key (M1-M7). The stored unit price will be recalled, and the total price will be calculated.
7. Maintenance
7.1 Cleaning
- Always turn off and unplug the scale before cleaning.
- Wipe the stainless steel pan and the scale body with a soft, damp cloth. A mild detergent can be used if necessary, followed by wiping with a clean, damp cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the scale's finish and components.
- Ensure no liquid enters the display, keypad, or internal components.
7.2 Battery Care
- Recharge the battery regularly, especially if the scale will not be used for an extended period.
- Avoid completely draining the battery, as this can reduce its lifespan.
- If the scale is stored for a long time, charge it every 3 months to maintain battery health.
8. Troubleshooting
If you encounter issues with your scale, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Scale does not turn on | No power, discharged battery, faulty power adapter. | Check power connection. Charge the battery. Ensure ON/OFF switch is in 'ON' position. |
| Inaccurate readings | Unstable surface, scale not zeroed, overload, environmental factors. | Place on a stable, level surface. Press 'ZERO'. Do not exceed 30kg. Avoid drafts or vibrations. |
| Display shows 'Err' or error code | Overload, internal error. | Remove weight from pan. Turn off and restart the scale. If error persists, contact support. |
| Battery not charging | Faulty adapter, loose connection, battery issue. | Check adapter connection. Ensure adapter is working. Contact support if battery does not charge. |
If the problem persists after attempting these solutions, please contact customer support.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | CAS |
| Model | PR-II Bench 30 |
| Weight Limit | 30 Kilograms |
| Readout Accuracy | 0.5g (1/2g) |
| Pan Dimensions | 330x235mm |
| Display Type | Dual LED Display (Weight, Unit Price, Total Price) |
| Power Source | Rechargeable Battery (6V/4Ah) + AC Adapter |
| Battery Backup | 40–60 hours (depending on usage) |
| Price Computing | Yes (Weight × Unit Price = Total Price) |
| Material | Acrylonitrile Butadiene Styrene, Stainless Steel |
| Item Weight | 3.5 Kilograms |
| Product Dimensions (LxWxH) | 19.4 x 33 x 10.1 Centimeters |
| Recommended Uses | Retail Shops, Grocery Shops, Vegetable Stalls, Kirana Stores, Markets |
10. Warranty Information
This CAS PR-II Bench 30kg Digital Price Computing Weighing Scale is covered by a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms, conditions, and duration. Keep your purchase receipt as proof of purchase for any warranty claims.
11. Support & Contact
For technical assistance, service, or inquiries regarding your CAS PR-II Bench 30kg Digital Price Computing Weighing Scale, please contact:
- Manufacturer: Cas Weighing India Pvt Ltd
- Contact Number: +919212559707





