1. Introducere
This manual provides comprehensive instructions for the safe and effective operation of your DigiTech Handheld Digital Tachometer, model DT-48. This device is designed for non-contact measurement of rotational speed (RPM) and total revolutions, offering high accuracy and ease of use for various applications.

Figure 1: DigiTech Handheld Digital Tachometer DT-48. This image displays the front of the tachometer, highlighting its five-digit LCD screen, the 'RPM/TOT' button for mode selection, and the 'MEM' button for memory functions. A laser warning symbol is visible at the top, indicating the laser emission point.
2. Informații de siguranță
Vă rugăm să citiți cu atenție toate avertismentele și instrucțiunile de siguranță înainte de a utiliza acest produs. Nerespectarea acestor instrucțiuni poate duce la vătămări corporale sau la deteriorarea dispozitivului.
- Siguranța laserului: This device emits a Class II laser. Do not stare directly into the laser beam or direct it at other people's eyes. Avoid prolonged exposure.
- Manevrarea bateriei: Use only the specified battery type (4 AA batteries). Do not mix old and new batteries, or different types of batteries. Dispose of batteries according to local regulations.
- Conditii de mediu: Do not expose the device to extreme temperatures, humidity, or direct sunlight. Avoid dropping the device or subjecting it to strong impacts.
- Întreţinere: Nu încercați să dezasamblați sau să modificați dispozitivul. Apelați la personal calificat pentru orice intervenție de service.
3. Caracteristicile produsului
The DigiTech DT-48 Handheld Digital Tachometer offers the following key features:
- Large, five-digit LCD screen for clear display of measurements.
- Ability to measure actual Revolutions Per Minute (RPM) or total revolutions.
- Equipped with a laser pointer for accurate targeting of the measurement point.
- Low-battery indicator to alert users when battery replacement is needed.
- Automatic storage of the last measurement, along with maximum and minimum readings.
- Comes with a protective carrying case for portability and storage.
4. Configurare
4.1 Instalarea bateriei
- Locate the battery compartment cover on the rear of the tachometer.
- Glisați sau desfaceți capacul pentru a deschide compartimentul.
- Introduceți 4 baterii AA, asigurându-vă că polaritatea este corectă (+/-), așa cum este indicată în interiorul compartimentului.
- Puneți bine capacul compartimentului bateriei.
4.2 Preparing the Target Surface
For accurate non-contact measurement, a reflective target must be applied to the rotating object. If the object's surface is already reflective, no additional target may be needed. Otherwise, attach a small piece of reflective tape (not included) to the rotating part where the laser beam will be directed.
5. Instrucțiuni de utilizare
5.1 Pornire/Oprire
Press the power button (usually located on the side or front) to turn the tachometer on. The LCD display will illuminate. Press and hold the power button again to turn the device off.
5.2 Selecting Measurement Mode (RPM / Total Revolutions)
The tachometer can measure either Revolutions Per Minute (RPM) or Total Revolutions. Press the 'RPM/TOT' button to toggle between these two modes. The selected mode will be indicated on the LCD display.
5.3 Luarea unei măsurători
- Ensure the tachometer is powered on and the desired measurement mode is selected.
- Point the laser beam at the reflective target on the rotating object. Maintain a detecting distance between 50mm and 500mm.
- Press and hold the measurement trigger button (often located on the side or front). The laser will activate, and the display will show the real-time measurement.
- Release the measurement trigger button to hold the last reading on the display.
5.4 Funcția de memorie
The tachometer automatically stores the last measurement, as well as the maximum and minimum measurements recorded during a measurement session.
- Press the 'MEM' button to cycle through the stored values: Last Reading, Maximum Reading, and Minimum Reading.
- To clear the memory, refer to the specific instructions in the device's full manual if available, or typically, turning the device off and on will clear the session memory.
6. Întreținere
6.1 Curățare
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water. Keep the laser emission and reception lenses clean for accurate readings.
6.2 Depozitare
When not in use for extended periods, remove the batteries to prevent leakage. Store the tachometer in its carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Depanare
| Problemă | Cauza posibila | Soluţie |
|---|---|---|
| Dispozitivul nu pornește. | Baterii descărcate sau instalate incorect. | Verificați polaritatea bateriilor. Înlocuiți-le cu baterii AA noi. |
| Citiri inexacte sau instabile. | Incorrect detecting distance; dirty lens; insufficient reflective target; ambient light interference. | Ensure distance is within 50mm-500mm. Clean the lens. Ensure reflective tape is properly applied and sufficient. Reduce strong ambient light if possible. |
| Laserul nu este vizibil. | Device not powered on; laser malfunction. | Ensure device is on and measurement button is pressed. If still not visible, contact support. |
| Indicatorul bateriei descărcate este aprins. | Bateriile sunt slabe. | Înlocuiți toate cele 4 baterii AA. |
8. Specificații
| Parametru | Valoare |
|---|---|
| Marca | DigiTech |
| Numărul de model | QM1448 |
| Interval de testare | 2.5 până la 99,999 rpm |
| Precizie | ±0.05% |
| SampLing Time | 0.5 seconds (over 120 RPM) |
| Detectarea distanței | 50 mm până la 500 mm |
| Afişa | LCD cu 5 cifre |
| Alimentare electrică | 4 x baterii AA (incluse) |
| Greutatea articolului | 2 kg |
| ASIN | B077XSGJVC |
| Data primului disponibil | 2 decembrie 2017 |
9. Garanție și asistență
Pentru informații despre garanție și asistență tehnică, vă rugăm să consultați documentația furnizată în momentul achiziției sau să contactați distribuitorul. Păstrați bonul fiscal ca dovadă a achiziției.





