Question 1

How do I choose the right flow meter for my application?

Accepted Answer

When choosing a flow meter, consider the following key factors:

1. **Measured Medium**: Determine if measuring gas or liquid, and the physical properties (viscosity, temperature, pressure, etc.)
2. **Flow Range**: Select appropriate range based on actual process flow, with recommended actual flow in 30%-80% of the range
3. **Accuracy Requirements**: Choose sensor grade according to process control precision requirements
4. **Installation Conditions**: Consider pipe diameter, straight pipe section length, installation space, etc.
5. **Environmental Factors**: Temperature, humidity, vibration, explosion-proof requirements, etc.

If you have questions, contact our technical team for selection recommendations.

Question 2

What are the installation requirements for flow meters?

Accepted Answer

Flow meter installation requirements are as follows:

**Basic Requirements:**
1. **Straight Pipe Section**: At least 10 pipe diameters upstream, 5 diameters downstream
2. **Location Selection**: Avoid interference sources like valves, elbows, pumps; install on straight pipe section
3. **Direction Requirements**: Install according to installation direction indicated in product manual
4. **Sealing**: Use appropriate sealing materials to ensure no leakage

**Special Environments:**
- **Explosion-proof Areas**: Must use explosion-proof products, install according to Ex certification requirements
- **High Temperature**: Choose high-temperature resistant products, pay attention to heat dissipation
- **Vibration**: Take vibration reduction measures

**Post-installation Checks:**
1. Check wiring correctness
2. Perform zero calibration
3. Test communication connection
4. Record installation parameters

Question 3

How often should flow meters be calibrated?

Accepted Answer

Calibration cycle depends on usage environment and accuracy requirements:

**General Recommendations:**
- **Standard Applications**: Every 6-12 months
- **High Precision Requirements**: Every 3-6 months
- **Critical Processes**: Every 1-3 months

**Factors Affecting Calibration Cycle:**
1. **Usage Frequency**: Frequent use requires more frequent calibration
2. **Environmental Changes**: Large temperature and pressure changes require increased calibration frequency
3. **Accuracy Drift**: Advance calibration when abnormal measurement value fluctuations are detected
4. **Regulatory Requirements**: Some industries have mandatory calibration cycle requirements

**Calibration Methods:**
- Self-calibration: On-site calibration using standard flow device
- Return to Manufacturer: Send product back to original factory for accuracy calibration
- Third-party Calibration: Entrust qualified metrology institutions for calibration

Question 4

How to troubleshoot when flow meter shows abnormal readings?

Accepted Answer

When flow meter shows abnormal readings, follow these troubleshooting steps:

**Step 1: Check Installation**
1. Confirm sensor installation direction is correct
2. Check if wiring terminals are loose
3. Verify sealing is good, no leakage
4. Check if straight pipe section length meets requirements

**Step 2: Check Environment**
1. Check if power supply voltage is stable
2. Confirm ambient temperature is within product working range
3. Check for strong electromagnetic interference sources
4. Verify if there are bubbles or impurities in the pipe

**Step 3: Check Parameters**
1. Check if range setting is reasonable
2. Confirm filter parameter settings are correct
3. Verify unit settings (Nm³/h vs m³/h)

**Step 4: Check Communication**
1. Check if communication cable is well connected
2. Verify communication protocol settings are consistent
3. Use host software to read raw data

**Still Unresolved:**
If the above steps cannot solve the problem, contact technical support and provide the following information:
- Product model and serial number
- Phenomenon description
- Abnormal reading data
- On-site environment parameters

Question 5

What is the product warranty period? What does it cover?

Accepted Answer

We provide comprehensive warranty and after-sales service:

**Standard Warranty Period:**
- **Hardware Warranty**: 24 months from purchase date
- **Software Warranty**: 12 months free upgrades

**Warranty Coverage:**
✅ **Product Defects**: Free repair or replacement for material and workmanship defects
✅ **Performance Issues**: Free resolution for non-compliant performance under normal use
✅ **Software Upgrades**: Firmware upgrades free (excluding new features)

**Warranty Exclusions:**
❌ Damage caused by misuse
❌ Natural wear and aging
❌ Unauthorized disassembly, modification or repair
❌ Use beyond specifications
❌ Force majeure such as natural disasters

**After-sales Service:**
1. **7×24 Hotline**: 400-XXX-XXXX
2. **Technical Support**: support@zhanwang.com
3. **Quick Response**: Response within 2 hours on working days
4. **On-site Service**: On-site technical support according to contract
5. **Training Service**: Provide operation and maintenance training

**Warranty Claim Process:**
1. Provide purchase proof
2. Fill fault report form
3. Send back to factory or wait for on-site service
4. Repair completed and returned

Question 6

How to order products? What is the delivery cycle?

Accepted Answer

Ordering and delivery information are as follows:

**Ordering Methods:**
1. **Online Inquiry**: Submit inquiry form on website, reply within 24 hours
2. **Email Ordering**: Send detailed requirements to sales@zhanwang.com
3. **Phone Ordering**: Call 400-XXX-XXXX to contact sales representative
4. **Offline Communication**: Schedule sales manager for on-site discussion

**Order Information Required:**
- Product model and quantity
- Application scenarios and technical requirements
- Installation location and conditions
- Special customization requirements (if applicable)
- Matching instruments and accessories list

**Standard Delivery Cycle:**
- **Standard Products**: 7-10 working days
- **Custom Products**: 15-25 working days
- **Large Orders**: Negotiated according to production schedule
- **Urgent Orders**: Expedited service available, subject to capacity confirmation

**Logistics Information:**
- Standard parts SF Express
- Large equipment dedicated truck logistics
- Provide real-time logistics tracking
- Can specify delivery time and contact person
- Basic packaging included, special packaging requires additional cost
**Payment Methods:**
- Bank transfer
- Bank drafts (corporate customers)
- Online payment
- Monthly settlement (long-term cooperative customers)

Technical Support

FAQ

Product Selection

Installation Guide

Calibration and Maintenance

Troubleshooting

Warranty and After-sales

Ordering and Delivery

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TMF100 Thermal Mass Flow Meter User Manual

TSW200 Thermal Flow Switch Datasheet

HTS300 High Temperature Flow Sensor Datasheet

CE Certificates Collection

Explosion Proof Certificate

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