1. Introducció
The CEM DT-128M is a digital pinless moisture meter designed for quickly indicating the moisture content in various materials, particularly wood, gypsum, and cement. This non-invasive device utilizes a capacitive sensor to measure moisture without causing damage to the surface. It features a clear white backlit LCD display, MAX/MIN functions, data hold, and programmable alarms for efficient and accurate moisture assessment.

Figura 1: Frontal view of the CEM DT-128M Digital Pinless Moisture Meter.
2. Informació de seguretat
Si us plau, llegiu i comprengui totes les instruccions de seguretat abans de fer servir el dispositiu. Si no segueix aquestes instruccions, es poden produir descàrregues elèctriques, incendis o lesions greus.
- No intenteu obrir ni modificar el dispositiu. No hi ha peces a l'interior que l'usuari pugui reparar.
- Mantingueu el dispositiu allunyat de l'aigua i altres líquids.
- No utilitzeu el dispositiu en entorns amb gasos, vapors o pols explosius.
- Assegureu-vos que les piles estiguin inserides correctament d'acord amb les marques de polaritat.
- Traieu les piles si no feu servir el dispositiu durant un període prolongat per evitar fuites.
- Desfeu-vos de les piles i del dispositiu d'acord amb la normativa local.
3. Producte acabatview i Components
The DT-128M features an ergonomic design for comfortable handling and a clear display for easy reading.

Figure 2: CEM DT-128M showing control buttons (UP, SET, DOWN, MEAS) and display.
Components clau:
- Capacitive Sensor: Located at the top of the device, used for non-invasive moisture detection.
- Pantalla LCD: White backlit screen showing moisture readings, MAX/MIN values, HOLD indicator, and battery status.
- Botó d'encesa: Per encendre o apagar el dispositiu.
- Botó SET: For entering settings or confirming selections.
- Botó MEAS: To initiate a measurement or exit a menu.
- Botons UP/DOWN: Per navegar pels menús o ajustar la configuració.
4. Configuració
Instal·lació de la bateria:
- Localitzeu la tapa del compartiment de la bateria a la part posterior del dispositiu.
- Feu lliscar o desenganxeu la tapa per obrir-la.
- Introduïu tres (3) piles AAA, assegurant-vos de la polaritat correcta (+/-) tal com s'indica a l'interior del compartiment.
- Col·loqueu la coberta del compartiment de la bateria amb seguretat.
5. Funcionament
Encès/apagat:
- Press the Power button (usually marked with a power symbol) to turn the device on.
- Press and hold the Power button for a few seconds to turn the device off. The device also features an Auto Power Off function to conserve battery life.
Prendre mesures:
- Enceneu el dispositiu.
- Place the capacitive sensor flat against the surface of the material you wish to measure. Ensure full contact for accurate readings.
- The moisture content will be displayed on the LCD screen. The measurement depth is approximately 20-40mm.

Figure 3: The DT-128M in use, measuring moisture on a wall surface.
Funció HOLD:
- During measurement, press the 'HOLD' button (if available, or 'SET' on some models) to freeze the current reading on the display.
- Press 'HOLD' again to release the reading and resume live measurement.
MAX/MIN Display Function:
- The device can display the maximum (MAX) and minimum (MIN) moisture readings recorded during a measurement session.
- Refer to the specific button layout (Figure 2) and the device's on-screen prompts to access and clear MAX/MIN values.
Alarmes programables:
The DT-128M allows for programmable moisture and humidity alarms. When the measured moisture content exceeds the set alarm threshold, the device will provide an alert.
- Press the 'SET' button to enter the alarm setting mode.
- Use the 'UP' and 'DOWN' buttons to adjust the desired alarm threshold.
- Press 'SET' again to confirm and save the setting.
- Press 'MEAS' to exit the setting mode.
Moisture Table of Comparison:
Use the following table as a general guide for interpreting moisture readings for common construction materials. Note that these are indicative values and can vary based on specific material composition and environmental conditions.
| Material de construcció | Display Reading (Digits) | Estat d'humitat |
|---|---|---|
| Guix | <30 digits | Seca |
| 30 - 60 dígits | En risc | |
| > 60 dígits | Humit | |
| Ciment | <25 digits | Seca |
| 25 - 50 dígits | En risc | |
| 50 - 75 dígits | Humit | |
| > 75 dígits | All Wet |
6. Especificacions
| Característica | Especificació |
|---|---|
| Interval de mesura | 0.0 100.0% ~ |
| Profunditat de penetració | 20 ~ 40 mm |
| Resolució | 0.1 |
| Mostra | LCD retroil·luminat blanc |
| Tipus de sensor | Capacitiva |
| Bateria | Three (3) AAA Batteries |
| Dimensions (AxAxP) | 242 mm x 63 mm x 30 mm |
| Pes | 226 g |
| Categoria de subministraments de bricolatge | Elèctric |
| Aplicació | Material de construcció |
| Garantia | 1 any |
7. Manteniment
- Neteja: Netegeu el dispositiu amb un drap sec i suau. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: Store the device in a cool, dry place when not in use. Remove batteries if storing for extended periods.
- Substitució de la bateria: Canvieu les piles quan aparegui l'indicador de bateria baixa a la pantalla.
8. Solució De Problemes
- El dispositiu no s'encén: Comproveu la instal·lació de les piles i assegureu-vos que no estiguin esgotades. Substituïu-les si cal.
- Lectures inexactes: Ensure the sensor is in full contact with the surface. Avoid measuring over metal objects or highly conductive materials. Calibrate if a calibration function is available (refer to advanced settings if applicable).
- La pantalla és tènue o parpelleja: Pot ser que les piles estiguin baixes. Substitueix-les.
9. Consells d'usuari
- For consistent readings, always measure the same spot multiple times.
- Be aware that surface moisture (e.g., condensation) can affect readings. Ensure the surface is dry before measurement.
- When measuring different materials, understand that the displayed 'digits' are relative. Always refer to the moisture comparison table for context.
- The pinless design is excellent for finished surfaces where you don't want to leave marks.
10. Garantia i Suport
The CEM DT-128M Digital Pinless Wood Moisture Meter comes with a 1-year warranty from the date of purchase, covering manufacturing defects. For technical support, warranty claims, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.





