1. Introducció
The Tenmars TM-402 is a versatile air velocity meter designed for precise measurement of air speed, temperature, and air flow. It is part of the TM-41X series, known for its accuracy and ease of use. Equipped with a 30mm vane, it is ideal for spot measurements at air outlets and for reliably checking air conditions. This manual provides detailed instructions for the setup, operation, and maintenance of your TM-402 meter.
2. Característiques clau
- 30mm 6-plastic vane for accurate readings.
- Sensitive light air response starting from 0.4 m/s.
- Air flow calculation function.
- Max/Min/Avg measurement modes and data hold function.
- Memory capacity for up to 99 records.
- Memory recall function for reviewemmagatzemar dades.
- Backlight function for improved visibility in low-light conditions.
- Measures air velocity, air flow, and temperature.
3. Especificacions
Especificacions generals
- Visualització: 42mm(W) x 33mm(L) Monochrome LCD with backlight
- Bateria: 9V (NEDA 1604, IEC 6F22 or JIS 006P)
- Durada de la bateria: Aproximadament 100 hores d'ús continuat
- Shutoff Rate Power: 3uA
- Operate Maximum Power: 25 mA
- Instrument Dimensions: 130 (L) x 56 (A) x 38 (Al) mm
- Instrument Weight: Aproximadament 160 g
- Dimensions de la sonda: 195 (L) x 47 (A) x 30 (Al) mm
- Longitud del cable: 95 cm
- Pes de la sonda: Aproximadament 100 g
Figure 1: Dimensions of the TM-402 meter.
Especificacions elèctriques
| Unitat | Interval | Resolució | Precisió |
|---|---|---|---|
| m/s | 0.4~20 | 0.1 | ±2%+0.2 |
| Km/hr (Kph) | 1.5~72 | 0.1 | ±2%+0.8 |
| mph | 0.9~44 | 0.1 | ±2%+0.4 |
| Knots (kts) | 0.8~38 | 0.1 | ±2%+0.4 |
| ft/min (fpm) | 79~4000 | 1 | ±2%+40 |
| Beaufort | 1~8 | 1 | -- |
| Unitat | Interval | Resolució | Precisió |
|---|---|---|---|
| CMM | 0~9999 | 1 | -- |
| CFM | 0~9999 | 1 | -- |
| Unitat | Interval | Resolució | Precisió |
|---|---|---|---|
| °C | -20~60 | 0.1 | ± 1 ℃ |
| °F | -4~140 | 0.1 | ± 1.8 ℉ |
4. Configuració
4.1 Instal·lació de la bateria
- Localitzeu la tapa del compartiment de la bateria a la part posterior de la unitat principal.
- Feu lliscar o desenganxeu la tapa per obrir el compartiment.
- Insert a new 9V battery (NEDA 1604, IEC 6F22, or JIS 006P) ensuring correct polarity.
- Torneu a col·locar la tapa del compartiment de la bateria fins que sentiu un clic i quedi ben fixada al seu lloc.
Figura 2: Compartiment de la bateria a la part posterior del mesurador.
4.2 Connexió de la sonda
- Connect the cable from the vane probe to the designated sensor input port on the top of the main meter unit.
- Ensure the connection is firm to prevent intermittent readings.
Figure 3: Tenmars TM-402 meter with the vane probe connected.
5. Instruccions de funcionament
Figure 4: Front panel and button layout of the TM-402 meter.
5.1 Encès/Apagat
- Premeu el botó SET botó per encendre el mesurador.
- Manteniu premut el botó SET button for a few seconds to turn the meter OFF.
5.2 Prendre mesures
- Ensure the probe is securely connected to the main unit.
- Hold the vane probe in the airflow you wish to measure, ensuring the airflow passes through the vane blades.
- The current air velocity and temperature will be displayed on the LCD screen.
Figura 5: Example of the TM-402 being used to measure airflow.
5.3 Selecció d'unitats
- Premeu el botó UNITAT button to cycle through available measurement units for air velocity (m/s, Km/hr, mph, Knots, ft/min, Beaufort) and temperature (°C, °F).
5.4 Retenció de dades
- Premeu el botó MANTENIM botó per congelar la lectura actual a la pantalla.
- Premeu MANTENIM again to release and resume live measurements.
5.5 Max/Min/Avg Measurements
- Premeu el botó MAX/MIN button to display the maximum, minimum, or average recorded values since the meter was powered on or the function was reset.
- Cycle through MAX, MIN, and AVG by pressing the button repeatedly.
5.6 Data Recording and Recall
- To record a reading, press the REC button. The meter can store up to 99 records.
- Per recuperar les dades emmagatzemades, premeu la tecla ESC/REC button. Follow on-screen prompts to navigate through stored records.
5.7 Funció de retroiluminació
- The backlight function illuminates the LCD for better viewing in dark environments. Refer to the device's specific button for backlight activation, often integrated with another button or automatic.
6. Manteniment
- Neteja: Wipe the meter and probe with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Substitució de la bateria: Replace the 9V battery when the low battery indicator appears on the display to ensure accurate readings and proper operation.
- Emmagatzematge: When not in use for extended periods, remove the battery to prevent leakage. Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Vane Care: Handle the vane probe carefully. Avoid dropping it or exposing it to excessive force, as this can damage the delicate blades and affect measurement accuracy.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El mesurador no s'encén. | Bateria morta o instal·lada incorrectament. | Comproveu la polaritat de la pila o substituïu-la per una pila nova de 9 V. |
| Lectures inexactes. | Damaged vane, obstructed airflow, or low battery. | Inspect vane for damage, ensure clear airflow, replace battery if low. |
| La pantalla és tènue o il·legible. | Bateria baixa o retroiluminació apagada. | Replace battery. Activate backlight function. |
| Probe not responding. | Loose connection or damaged cable/vane. | Ensure probe cable is firmly connected. Inspect cable and vane for visible damage. |
8. Consells d'usuari
- For the most accurate air velocity readings, ensure the vane is positioned directly in the path of the airflow and is not obstructed.
- When measuring air flow (CMM/CFM), accurately input the duct or vent area into the meter's settings if required, as this directly impacts the calculation.
- Utilize the Max/Min/Avg functions to capture fluctuations in airflow or temperature over time, which can be useful for diagnostics.
- The backlight feature is particularly useful in dimly lit areas like HVAC ducts or crawl spaces.
9. Garantia i Suport
The Tenmars TM-402 Air Velocity Meter comes with a 1-year warranty from the date of purchase, covering manufacturing defects. For technical support, warranty claims, or any inquiries, please contact our support team:
- Correu electrònic: 1962233699@qq.com
- WhatsApp: +8613807408738
Please provide your model number (TM-402) and a detailed description of the issue when contacting support.
