1. Product Overview
The Kethvoz 856A is a professional HVAC anemometer designed for accurate measurement of wind speed, air volume (CFM/CMM), and temperature. It features USB data storage and PC connectivity for real-time monitoring and data analysis, making it suitable for various applications including AC system diagnostics, ductwork analysis, and dust collection systems.
Key Features:
- Multiple Measurement Modes: Supports Max, Min, (2/3)Max, Average, and Real-time measurements.
- Switchable Units: 5 wind speed units (m/s, km/h, ft/min, knots, Mph) and 2 temperature units (Celsius & Fahrenheit).
- Wide Measurement Range: Wind speed from 0.3 to 45 m/s, temperature from 32°F to 113°F, and air volume from 0 to 999900 CMM/CFM.
- Split Design Probe: Allows for flexible positioning and easy readings in various environments. The wind vane sensor can extend up to 2 meters.
- USB Data Transfer: Connects to a PC for data retention, storage (up to 600 sets), and deletion functions.
- User-Friendly Design: Compact, lightweight, with a large backlit LCD display for clear readings in low light conditions. Includes data hold, low battery indicator, and automatic shut-off.
2. Package Contents
Verify that all items are present and in good condition upon unpacking.
- Kethvoz KE-856A Anemometer Main Unit
- Remote Vane Sensor Probe with coiled cable
- USB Data Cable
- Software CD
- 9V Battery
- Small Screwdriver
- Hard Carrying Case
- User Manual
Figure 2.1: Complete package contents of the Kethvoz 856A Anemometer.
3. Setup Instructions
3.1 Battery Installation
- Locate the battery compartment on the back of the main unit.
- Use the provided screwdriver to open the battery compartment cover.
- Insert the 9V battery, ensuring correct polarity.
- Replace the battery compartment cover and secure it with the screw.
3.2 Connecting the Vane Sensor
- Connect the coiled cable from the vane sensor probe to the designated port on the top side of the main anemometer unit.
- Ensure the connection is secure.
Figure 3.1: Kethvoz 856A Anemometer main unit and connected vane sensor.
3.3 Extending the Vane Sensor Probe
The vane sensor probe features an extendable design for reaching measurement points in ducts or elevated areas.
- Gently pull the vane sensor head away from the handle to extend the probe.
- The probe can extend up to 2 meters.
- To retract, gently push the vane sensor head back towards the handle.
Figure 3.2: Extendable vane sensor probe for flexible measurements.
3.4 PC Software Installation (Optional)
To utilize data logging and real-time monitoring features, install the provided PC software.
- Insert the software CD into your computer's CD-ROM drive.
- Follow the on-screen instructions to install the customized PC software.
- Connect the anemometer to your PC using the supplied USB cable. The USB port is located on the side of the main unit.
Figure 3.3: Anemometer connected to PC for data transfer and monitoring.
Video 3.1: Unboxing, setup, and basic operation of the Kethvoz 856A Anemometer, including connecting the probe and powering on the device.
4. Operating Instructions
4.1 Power On/Off
Press the POWER button (center button) to turn the device on or off.
4.2 Changing Measurement Units
- Wind Speed Units: Press the UNIT button (button 5) to cycle through m/s, km/h, ft/min, knots, and Mph.
- Temperature Units: Press the °F/°C button (button 6) to switch between Celsius and Fahrenheit.
4.3 Selecting Measurement Modes
The anemometer supports various measurement modes for wind speed and air volume.
- VEL/FLOW Button (Button 1): Toggles between wind velocity and air volume (CFM/CMM) measurement displays.
- MAX/MIN Button (Button 2): Cycles through Maximum, Minimum, (2/3)Max, and Average readings.
- HOLD Button (Button 4): Freezes the current reading on the display. Press again to release.
Figure 4.1: Anemometer display showing different measurement modes.
4.4 Air Volume (CFM/CMM) Measurement
To measure air volume, you need to input the cross-sectional area of the duct or opening.
- Press the VEL/FLOW button until the display shows air volume (CFM or CMM).
- Press the SAMPLE AREA button (button 3) to enter the cross-sectional area. Use the arrow keys to adjust the values and ENTER to confirm.
- Position the vane sensor in the airflow. The device will calculate and display the air volume.
Figure 4.2: Air volume measurement display (CMM/CFM).
4.5 Data Logging and PC Connection
The anemometer can store up to 600 sets of data and connect to a PC for real-time monitoring and export.
- Recording Data: Press the REC button (button 9) to start recording data. Press again to stop.
- Viewing Stored Data: Use the READ button (button 8) and arrow keys to browse through recorded data.
- PC Connection: Connect the device to your PC using the USB cable. Launch the installed software to view real-time data, analyze trends, and export logs.
4.6 Backlight and Auto Shut-off
- Backlight: Press the LIGHT button (button 7) to turn the display backlight on or off.
- Auto Shut-off: The device features an automatic shut-off function to conserve battery power after a period of inactivity. This feature can typically be disabled or adjusted via the settings menu (refer to the detailed manual on the CD for advanced settings).
5. Maintenance
5.1 Cleaning
Wipe the device and vane sensor with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the device openings.
5.2 Storage
When not in use for extended periods, remove the battery to prevent leakage. Store the anemometer in its protective carrying case in a cool, dry place away from direct sunlight and extreme temperatures.
5.3 Battery Replacement
When the low battery indicator appears on the display, replace the 9V battery as described in Section 3.1.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead battery; Incorrect battery installation | Replace battery; Check battery polarity |
| Inaccurate readings | Vane sensor obstructed or damaged; Incorrect unit selected; Environmental factors | Clear obstruction, inspect sensor for damage; Verify correct units (m/s, CFM, etc.); Ensure stable measurement conditions |
| PC connection issues | USB cable not properly connected; Software not installed or running; Driver issues | Ensure USB cable is securely connected to both device and PC; Install PC software from CD; Consult software manual for driver installation |
| Display is dim or unreadable | Backlight off; Low battery | Press the LIGHT button to activate backlight; Replace battery |
7. Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Kethvoz |
| Model Number | KE-856A |
| Wind Speed Range | 0.3 ~ 45 m/s |
| Wind Speed Resolution | 0.001 |
| Wind Speed Accuracy | ±3% + 0.1 digit |
| Temperature Range | 32°F ~ 113°F (0°C ~ 45°C) |
| Temperature Accuracy | ±1.8°F (±1°C) |
| Air Volume Range (CMM/CFM) | 0 ~ 999900 CMM/CFM |
| Data Storage | Up to 600 sets |
| Connectivity | USB for PC connection |
| Power Source | 9V Battery |
| Material | Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC) |
| Item Dimensions (L x W x H) | 8.27 x 11.02 x 2.76 inches |
| Item Weight | 1.76 pounds (800 Grams) |
8. Warranty Information
Kethvoz products are manufactured to high quality standards. For specific warranty details, including coverage period and terms, please refer to the warranty card included in your product packaging or contact Kethvoz customer support. Keep your purchase receipt as proof of purchase for any warranty claims.
9. Customer Support
If you encounter any issues or have questions regarding your Kethvoz 856A Anemometer, please refer to the troubleshooting section first. For further assistance, technical support, or service inquiries, please contact Kethvoz customer service through the contact information provided on the product packaging or the official Kethvoz website.
