Shanghai Xinzhuang Instrument Co., Ltd. is committed to a business philosophy centered around technological innovation and advancement. The company continues to contribute to the progress of human society through strategic innovations and the development of cutting-edge products. As an integrated enterprise that combines R&D, manufacturing, and sales, we take pride in delivering high-quality instruments and exceptional customer service. We welcome inquiries from all customers.
**Instrument Installation**
1. **Working Environment**:
Electronic balances are precision instruments, so it's crucial to choose an appropriate installation location. Ensure the platform is stable and flat to prevent vibrations. Avoid direct sunlight, heat sources, and humid environments. Also, avoid placing the balance in areas with strong air currents.
2. **Installation of the Balance**:
Always follow the manufacturer’s manual for proper installation procedures.
**Using the Balance**
1. **Level Adjustment**:
Before turning on the balance, check the bubble level at the back of the device. If it’s not centered, adjust the leveling screws—raise the left side and lower the right side until the bubble is in the center.
2. **Preheating**:
After initial power-on or after a long period of inactivity, allow at least 30 minutes for the balance to warm up. Avoid frequent power cycling during normal use to maintain accuracy.
3. **Weighing Process**:
- Press the ON/OFF button to activate the display.
- Wait for the self-test to complete. When the display shows zero, the balance is ready for use.
- Place weighing paper on the pan and press the TARE button to tare the weight. Once the display reads zero, you can add your sample for measurement.
- After weighing, turn off the display using the ON/OFF button.
**Important Notes**
1. **Understanding the Display Status**:
- "O" in the upper right corner means the display is off.
- "O" in the lower left corner indicates the balance is in standby mode and ready for use.
- A diamond logo in the upper left corner means the microprocessor is performing a function and cannot accept new tasks.
2. **Avoid Moving the Balance**:
The balance is calibrated at the factory, so moving it may affect accuracy. If moved, recalibration is necessary.
3. **Never Weigh Directly Without Weighing Paper**:
Always use weighing paper to prevent contamination. Clean the balance after each use to ensure accuracy and avoid affecting others.
**Troubleshooting Common Issues**
1. **Inaccurate Readings**:
Check if internal code values are stable, whether there is friction in the sensor parts, and if the power supply is consistent. Verify that the four legs of the weighing pan have even weight distribution. Further analysis or calibration may be required.
2. **Balance Won’t Return to Zero After Weight Removal**:
Check the sensor output signal against standard ranges. Adjust the sensor’s adjustable resistor if needed. If the issue persists, inspect the sensor for damage. If the sensor is functioning properly, the problem may lie in the amplifier or A/D conversion circuits.
3. **Failure to Start**:
First, check the fuse, power switch, power cable, and voltage settings. Verify the AC input and output of the transformer. If the device has a battery, try using AC power instead. Then check the rectifier, voltage regulator, and display driver circuits. If no issues are found, test the processor and auxiliary circuits for damage.
4. **Display Shows Garbled Text**:
Replace the original display board with a known good one. If the display works normally, the issue is likely with the display circuit. If not, check the drive circuit. Finally, verify that the processor’s output pins are within the expected range.
5. **Button Not Working**:
Replace the button with a new one to test. If the new button functions properly, the issue is likely due to poor contact. Check for open circuits or soldering issues between the button and the CPU. Also, inspect the button holder for any contact problems.
6. **Cannot Return to Zero After Full Load**:
This often occurs due to changes in the small signal input range. Follow the same steps as for the zero-return issue—first check the power supply and A/D circuit, then test the sensor output.
7. **Pointer Jumps When Turned On**:
If the distance between the knife edge and the knife pad is uneven, loosen the screw on the left arm of the horizontal bracket. Use your hand to adjust the height of the small pillar until the pointer stabilizes.
**Recommended Balance Models**
Popular brands include Swiss METTLER TOLEDO, German Sartorius, American Ohaus, and Japanese Shimadzu. Many models are produced domestically in China, while others are imported.
- **METTLER TOLEDO**: AL and PL series are made in China; AB and XP series are imported. Common models: AL104, AL204, XP105DU, XS205DU, AB135-S/F.
- **Sartorius**: Most models are imported. Popular ones: BT25S, BSA124S-CW, BSA224S, BSA124S, BSA224S.
- **Ohaus**: Known for quality and affordability, with key models like CP214 and CP114.
- **Chinese Brands**: FA1004, FA2004, and other widely used models.
We recommend visiting Shanghai Xinzhuang Instrument Co., Ltd. for expert guidance and support. Our team is here to help you choose the right equipment and provide reliable service. Welcome!
Dish Garden
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