1. 제품 오버view
The Jectse AR925 Digital Contact Tachometer is an instrument designed for precise measurement of rotating and linear rolling speeds. It utilizes advanced electro-optical technology to provide accurate readings across a wide range of applications. This device is equipped with a clear LCD display and features automatic storage of maximum, minimum, and last measured values for convenient data analysis.

Image 1.1: Jectse AR925 Digital Contact Tachometer in use, showing the display.
주요 특징:
- Utilizes MCU and electro-optical technology for efficient measurement of rotating and linear rolling speed.
- Wide measuring range of 0.5-19999 RPM with high resolution.
- Large LCD display for clear and easy-to-read measurements.
- Automatically stores the maximum (MAX), minimum (MIN), and last (LAST) measured values.
- Includes convertible accessories for various measurement applications.
2. 패키지 내용
포장을 풀 때 아래 나열된 모든 품목이 들어 있고 상태가 양호한지 확인하세요.
- 1 x Jectse AR925 Digital Contact Tachometer
- 1 x Linear Circular Probe
- 1 x Speed Column Probe
- 1 x Speed Large Cone Probe
- 1 x Speed Small Cone Probe
- 1 x 운반 가방
- 1 x 사용자 매뉴얼(이 문서)

Image 2.1: The tachometer and its various contact probes and carrying bag.
3. 장치 구성 요소
Familiarize yourself with the main components and controls of the AR925 Digital Contact Tachometer:

Image 3.1: Labeled diagram of the tachometer's front panel and contact head.
- Contact Rotate Head: The rotating shaft where different contact probes are attached for measurement.
- LCD 디스플레이: Shows measurement readings, units, and stored values.
- 메모리 버튼(MEM): Used to access stored MAX, MIN, and LAST values.
- Measure MAX/MIN Value Button: Toggles between displaying maximum and minimum recorded speeds.
- Switch/Null Button (ON/NULL): Powers the device on/off and can be used to clear readings or reset.
- 단위 버튼(UNIT): Changes the measurement unit (e.g., RPM, m/min, ft/min).
4. 사양
The following table outlines the technical specifications of the Jectse AR925 Digital Contact Tachometer:

Image 4.1: Visual representation of the tachometer's dimensions and key parameters.
| 매개변수 | 값 |
|---|---|
| 측정 범위 | 0.5-19999 RPM, 0.05-19999.9 m/min, 0.2-6560 Ft/min |
| 해상도 비율 | 0.1 RPM, 1 RPM, 0.01 m/min, 0.1 m/min, 1 Ft/min |
| Measure Error | ±(0.05%+1 digit) |
| Samp링 주파수 | 0.8초 |
| 측정 방법 | 연락하다 |
| 작동 온도 | 0~50도 |
| 보관 온도 | -20~70도 |
| 힘 | 3 * 1.5V AAA battery (Not included) |
| 무게 | 132g |
| 치수(길이 x 너비 x 높이) | 155mm x 55mm x 35mm(6.1 x 2.2 x 1.4인치) |
| 재료 | 아크릴로니트릴 부타디엔 스티렌(ABS) |
5. 배터리 설치
The AR925 Digital Contact Tachometer requires three (3) AAA batteries (not included) for operation. Follow these steps to install the batteries:
- 타코미터 뒷면에 있는 배터리함 덮개를 찾으세요.
- 배터리함 덮개를 아래쪽 또는 바깥쪽으로 밀어서 여세요.
- Insert three (3) AAA batteries, ensuring correct polarity (+ and -) as indicated inside the compartment.
- 배터리 칸 덮개를 제자리에 다시 밀어 넣어 딸깍 소리가 날 때까지 단단히 고정합니다.

이미지 5.1: View 배터리 칸이 열려 있는 모습으로, AAA 배터리를 넣는 위치를 보여줍니다.
6. 운영
This section details how to use your Jectse AR925 Digital Contact Tachometer for various measurements.
6.1 전원 켜기/끄기
- 장치의 전원을 켜려면 ON/NULL 단추.
- The device will automatically power off after approximately 30 seconds of inactivity to conserve battery life. There is no dedicated 'off' button.
6.2 Attaching Contact Probes
Select the appropriate contact head (Linear Circular, Speed Column, Speed Large Cone, or Speed Small Cone) based on the object to be measured. Gently push and twist the chosen probe onto the Contact Rotate Head until it is securely attached.

이미지 6.1: 이상view of the multi-sensor probes included with the tachometer.
6.3 측정하기
- Ensure the correct contact probe is attached.
- 를 누르세요 ON/NULL button to power on the tachometer.
- Gently press the rotating part of the contact probe against the center of the rotating shaft or surface of the object you wish to measure. Maintain steady contact.
- The LCD display will show the real-time measurement.
- To change the measurement unit (RPM, m/min, ft/min), press the 단위 단추.

Image 6.2: Step-by-step illustration of the contact measurement method.
6.4 Viewing Stored Values (MAX/MIN/LAST)
The tachometer automatically stores the maximum, minimum, and last measured values. To view 이것들:
- 측정을 마친 후, 버튼을 누르세요. 멤 단추.
- 를 누를 때마다 멤 button will cycle through the MAX, MIN, and LAST recorded values.
- The display will indicate which value is currently shown (e.g., "MAX", "MIN", "LAST").
Video 6.3: A demonstration of the Jectse Digital Contact Tachometer in operation, showcasing its features and measurement capabilities.
7. 유지관리
Proper maintenance ensures the longevity and accuracy of your tachometer.
- 청소: 부드럽고 마른 천으로 기기를 닦으세요. 연마성 세제나 용제를 사용하지 마세요.
- 저장: When not in use for extended periods, remove the batteries to prevent leakage. Store the tachometer and its accessories in the provided carrying bag in a cool, dry place, away from direct sunlight and extreme temperatures.
- 프로브 관리: Inspect contact probes regularly for wear or damage. Replace if necessary to maintain measurement accuracy. Avoid exposing rubber tips to high temperatures, as they may melt.
8. 문제 해결
타코미터에 문제가 발생하면 다음의 일반적인 문제 및 해결 방법을 참조하십시오.
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 장치의 전원이 켜지지 않습니다. | 배터리가 방전되었거나 잘못 설치되었습니다. | 배터리 극성을 확인하십시오. 새 AAA 배터리로 교체하십시오. |
| 부정확하거나 일관성이 없는 판독값. | Loose contact with the rotating object; damaged probe; low battery. | Ensure firm and stable contact. Inspect and replace the probe if damaged. Replace batteries. |
| Display shows '0' or no change during measurement. | No contact or insufficient rotation. | Verify the object is rotating. Ensure the probe is making proper contact with the rotating surface. |
| Rubber tips on probes melt or deform. | 고온에 노출. | Avoid using the tachometer on surfaces exceeding the probe's temperature resistance. Consider alternative measurement methods for high-temperature applications. |
9. 보증 및 지원
Jectse products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Jectse web사이트. 보증 청구에 대비해 구매 증빙 자료로 구매 영수증을 보관하세요.