1. Introduktion
This manual provides detailed instructions for the safe and effective use of the Walfront PM6508 Digital Temperature Humidity Meter. This device is designed for high-precision measurement of ambient temperature and relative humidity, offering features such as data hold, backlight display, and wet bulb/dew point temperature calculations. It is suitable for various applications including home, office, industrial settings, and environmental monitoring.
2. Sikkerhedsoplysninger
Please read and understand all safety warnings and operating instructions before using this instrument. Failure to follow these instructions may result in electric shock, fire, or injury.
- Do not operate the meter if it appears damaged or if the battery cover is not properly closed.
- Avoid exposing the meter to extreme temperatures, direct sunlight, or high humidity for prolonged periods.
- Do not attempt to repair or modify the meter. Refer all servicing to qualified personnel.
- Fjern batterierne, hvis måleren ikke bruges i længere tid, for at forhindre lækage.
- Keep the sensor area clean and free from obstructions to ensure accurate readings.
3. Produktet er slutview
The Walfront PM6508 is a compact and portable digital meter designed for accurate environmental measurements. It features an easy-to-read LCD display with backlight and intuitive button controls.

Figur 3.1: Front view of the Walfront PM6508 meter with key components labeled. This includes the temperature and humidity sensor at the top, the HD display, various control buttons (Power, Max/Min, Data Hold, Data Storage, Unit Switch, Backlight), and an anti-fall protective sleeve.
3.1 Nøglefunktioner
- Høj præcision sensor: Provides accurate temperature and humidity readings.
- LCD-skærm med baggrundsbelysning: Sikrer klar læsbarhed under forskellige lysforhold.
- Datahold funktion: Fryser den aktuelle aflæsning på displayet.
- Datalagring: Gemmer op til 100 grupper af måledata.
- Wet Bulb & Dew Point Temperature: Calculates and displays these critical environmental parameters.
- Enhedsskift: Skift nemt mellem Celsius (°C) og Fahrenheit (°F).
- Automatisk nedlukning: Sparer batterilevetid.
- Lavstrømsindikator: Giver besked når batterierne skal udskiftes.
3.2 Pakkens indhold

Figur 3.2: The Walfront PM6508 meter shown alongside its portable storage bag, indicating typical package contents.
- Walfront PM6508 Digital Temperature Humidity Meter
- Bærbar opbevaringstaske
- Brugermanual
4. Opsætning
4.1 Batteriinstallation
The PM6508 meter requires 4 x 1.5V AAA batteries (not included) for operation.
- Find batteridækslet på bagsiden af måleren.
- Skub batteridækslet nedad for at åbne det.
- Isæt fire AAA-batterier, og sørg for at polerne (+ og -) vender korrekt som angivet i batterirummet.
- Sæt batteridækslet på igen ved at skubbe det tilbage på plads, indtil det klikker sikkert.

Figur 4.1: Bag view of the meter showing the open battery compartment for AAA battery installation.
5. Betjeningsvejledning
5.1 Tænd/sluk
- Tryk på green power button (
) to turn the meter on. - Tryk og hold på gray power button (
) for approximately 2 seconds to turn the meter off. The meter also features an automatic shut-down function to conserve battery life.
5.2 Udførelse af målinger
Once powered on, the meter will immediately begin displaying real-time temperature and humidity readings on the LCD screen. Ensure the sensor at the top of the device is exposed to the environment you wish to measure.

Figur 5.1: The meter in use, displaying temperature and humidity readings on its LCD screen.
5.3 Enhedsskift (°C/°F)
To switch between Celsius (°C) and Fahrenheit (°F) temperature units:
- Tryk på °C/°F knap (
) located on the keypad. The display will update to show readings in the selected unit.
5.4 Baggrundsbelysningsfunktion
To activate or deactivate the display backlight:
- Tryk på baggrundsbelysningsknap (
) to toggle the backlight on or off. This is useful for reading in low-light conditions.
5.5 Data Hold (H)
Sådan fryser du de aktuelle aflæsninger på displayet:
- Tryk på H knap (
). The "H" icon will appear on the display, indicating that the data is held. - Tryk på H knap again to release the data hold and resume real-time measurements.
5.6 Maximum/Minimum (MIN/MAX) Measurement
Til view the maximum or minimum recorded values:
- Tryk på MIN/MAX knap (
) once to display the maximum temperature and humidity recorded since the meter was powered on or the function was reset. - Tryk på MIN/MAX knap again to display the minimum temperature and humidity.
- Tryk på MIN/MAX knap a third time to exit the MIN/MAX mode and return to real-time readings.
5.7 Data Storage (MEM) and Retrieval (READ)
The meter can store up to 100 groups of measurement data.
- To Store Data: Tryk på MEM-knap (
) to save the current temperature and humidity readings. The display will briefly show a memory location number. - To Retrieve Data: Tryk på READ knap (
) to enter data retrieval mode. Use the MEM-knap to scroll through stored data records. - To Exit Retrieval: Tryk på READ knap again to exit data retrieval mode.
5.8 Wet Bulb (WB) and Dew Point (DP) Temperature
To display Wet Bulb or Dew Point temperatures:
- Tryk på DP/WB button (
) once to display the Dew Point temperature. - Tryk på DP/WB button again to display the Wet Bulb temperature.
- Tryk på DP/WB button a third time to return to standard temperature and humidity display.
6. Vedligeholdelse
6.1 Rengøring
- Tør målerens c afasing med en blød, damp klæde. Brug ikke slibende rengøringsmidler eller opløsningsmidler.
- Keep the sensor area clean and free from dust or debris to ensure accurate readings. Do not insert any objects into the sensor opening.
6.2 Opbevaring
- Når enheden ikke er i brug i længere perioder, skal batterierne fjernes for at forhindre lækage og beskadigelse af den.
- Opbevar måleren et køligt, tørt sted, væk fra direkte sollys og ekstreme temperaturer.
- Utilize the provided portable storage bag for protection during storage and transport.
7. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Måleren tænder ikke. |
|
|
| Upræcise aflæsninger. |
|
|
| Skærmen er svag eller flimrer. |
|
|
| Cannot store or retrieve data. |
|
|
8. Specifikationer
The following table outlines the technical specifications for the Walfront PM6508 Digital Temperature Humidity Meter.


Figur 8.1: Detailed technical specifications including ranges, resolution, and precision for temperature, humidity, wet bulb, and dew point measurements, along with general parameters.
| Parameter | Værdi |
|---|---|
| Model | PM6508 |
| Omgivende temperaturområde | -20 til 60 °C (-4 til 140 °F) |
| Præcision af omgivende temperatur | ±1.5 °C (-20 to 0 °C, 45 to 60 °C), ±0.5 °C (0 to 45 °C) |
| Relativ luftfugtighedsområde | 0% - 100% RF |
| Relative Humidity Precision | ±4.0% (0-20%, 80-100%), ±3.0% (20-80%) |
| Vådpære temperaturområde | -20 til 60 °C (4 til 140 °F) |
| Wet Bulb Temperature Precision | ±1.5 °C (-20 to 0 °C, 45 to 60 °C), ±0.5 °C (0 to 45 °C) |
| Dugpunktstemperaturområde | -50 til 60 °C (-58 til 140 °F) |
| Dew Point Temperature Precision | ±1.5 °C (-50 to 0 °C, 45 to 60 °C), ±0.5 °C (0 to 45 °C) |
| Opløsning | 0.1 °C / °F / %RH |
| Datalagring | 100 grupper |
| Strømforsyning | 4 x 1.5V AAA-batterier (medfølger ikke) |
| Dimensioner (L x B x H) | 180 x 60 x 29 mm (7.1 x 2.4 x 1.1 tommer) |
| Vægt | 254 g (9 oz) |
| Driftsfugtighed | 0% - 100% (non-condensing) |
9. Ansøgninger
The Walfront PM6508 is suitable for a wide range of applications requiring accurate temperature and humidity monitoring.

Figur 9.1: Examples of environments where the PM6508 meter can be effectively used for temperature and humidity monitoring.
- Residential and Office Environments: Monitoring indoor climate for comfort and health.
- Industriel produktion: Ensuring optimal conditions for manufacturing processes.
- Warehousing and Storage: Protecting goods sensitive to temperature and humidity, such as in wine cellars or general storage.
- Landbrug: Monitoring conditions in planting sheds, greenhouses, and aquaculture.
- Research and Development Laboratories: Maintaining precise environmental controls for experiments.
- VVS-systemer: Assisting in the evaluation and maintenance of heating, ventilation, and air conditioning systems.
10. Garanti og support
Walfront products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official Walfront webwebsted. Gem venligst din købsbevis til garantikrav.