1. Entwodiksyon
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. Enfòmasyon sou Sekirite
Please read all safety warnings and instructions carefully before using this product. Failure to follow these instructions may result in injury or damage to the device.
- Sekirite lazè: 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.
- Manyen batri: 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.
- Kondisyon anviwònman: Do not expose the device to extreme temperatures, humidity, or direct sunlight. Avoid dropping the device or subjecting it to strong impacts.
- Antretyen: Pa eseye demonte oswa modifye aparèy la. Konfye tout antretyen bay pèsonèl kalifye.
3. Pwodwi Features
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. Enstalasyon
4.1 Enstalasyon batri
- Locate the battery compartment cover on the rear of the tachometer.
- Glise oswa deklipe kouvèti a pou ouvri konpatiman an.
- Mete 4 pil AA yo nan plas yo, epi asire w polarite a kòrèk (+/-) jan yo endike anndan konpatiman an.
- Ranplase kouvèti lòj batri a byen.
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. Operasyon Enstriksyon
5.1 Limen/Etenyen
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 Pran yon mezi
- 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 Fonksyon memwa
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. Antretyen
6.1 Netwayaj
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 Depo
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.
NAN. Depanaj
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Aparèy pa limen. | Pil ki mouri oswa ki mal enstale. | Tcheke polarite pil yo. Ranplase yo ak nouvo pil AA. |
| Lekti ki pa egzak oswa ki pa estab. | 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. |
| Lazè a pa vizib. | Device not powered on; laser malfunction. | Ensure device is on and measurement button is pressed. If still not visible, contact support. |
| Endikatè batri ki ba limen. | Batri yo ba. | Ranplase tout 4 pil AA. |
8. Espesifikasyon
| Paramèt | Valè |
|---|---|
| Mak | DigiTech |
| Nimewo Modèl | QM1448 |
| Tès Range | 2.5 a 99,999 RPM |
| Presizyon | ± 0.05% |
| Samptan Ling | 0.5 seconds (over 120 RPM) |
| Detekte Distans | 50mm a 500mm |
| Ekspozisyon | LCD 5 chif |
| Pwovizyon pou pouvwa | 4 x pil AA (enkli) |
| Pwa atik | 2 kg |
| ASIN | B077XSGJVC |
| Dat Premye Disponib | 2 desanm 2017 |
9. Garanti ak sipò
Pou enfòmasyon sou garanti a ak sipò teknik, tanpri gade dokiman yo te bay lè w te achte a oswa kontakte machann ou an. Kenbe resi acha w la kòm prèv acha.





