1. Ọja Ipariview
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.
Awọn ẹya pataki:
- 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. Package Awọn akoonu
Nigbati o ba ṣii, jọwọ rii daju pe gbogbo awọn nkan ti o wa ni isalẹ wa ati ni ipo to dara:
- 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 Apo gbigbe
- 1 x Itọsọna olumulo (iwe yii)

Image 2.1: The tachometer and its various contact probes and carrying bag.
3. Device irinše
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.
- Ifihan LCD: Shows measurement readings, units, and stored values.
- Memory Button (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.
- Unit Button (UNIT): Changes the measurement unit (e.g., RPM, m/min, ft/min).
4. Awọn pato
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.
| Paramita | Iye |
|---|---|
| Iwọn Iwọn | 0.5-19999 RPM, 0.05-19999.9 m/min, 0.2-6560 Ft/min |
| Ipin ipinnu | 0.1 RPM, 1 RPM, 0.01 m/min, 0.1 m/min, 1 Ft/min |
| Measure Error | ±(0.05%+1 digit) |
| SampIgbohunsafẹfẹ ling | 0.8 iṣẹju-aaya |
| Ọna wiwọn | Olubasọrọ |
| Awọn iwọn otutu ṣiṣẹ | 0 ~ 50°C |
| Ibi ipamọ otutu | -20 ~ 70°C |
| Agbara | 3 * 1.5V AAA battery (Not included) |
| Iwọn | 132g |
| Awọn iwọn (L x W x H) | 155mm x 55mm x 35mm (6.1 x 2.2 x 1.4 inches) |
| Ohun elo | Acrylonitrile Butadiene Styrene (ABS) |
5. Fifi sori batiri
The AR925 Digital Contact Tachometer requires three (3) AAA batteries (not included) for operation. Follow these steps to install the batteries:
- Locate the battery compartment cover on the back of the tachometer.
- Gbe ideri batiri naa pada si isalẹ tabi ita lati ṣii.
- Insert three (3) AAA batteries, ensuring correct polarity (+ and -) as indicated inside the compartment.
- Rọpo ideri iyẹwu batiri nipa gbigbe pada si aaye titi yoo fi tẹ ni aabo.

Aworan 5.1: View of the open battery compartment, showing where to insert AAA batteries.
6. Isẹ
This section details how to use your Jectse AR925 Digital Contact Tachometer for various measurements.
6.1 Titan / Pa a
- Lati fi agbara sori ẹrọ, tẹ bọtini naa ON/NULL bọtini.
- 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.

Aworan 6.1: Pariview of the multi-sensor probes included with the tachometer.
6.3 Gbigba Awọn wiwọn
- Ensure the correct contact probe is attached.
- Tẹ awọn 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 UNIT bọtini.

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 these:
- Lẹhin ti o mu wiwọn kan, tẹ bọtini naa MEM bọtini.
- Kọọkan titẹ ti awọn MEM 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. Itọju
Proper maintenance ensures the longevity and accuracy of your tachometer.
- Ninu: Mu ẹrọ naa nu pẹlu asọ ti o gbẹ. Ma ṣe lo abrasive ose tabi epo.
- Ibi ipamọ: 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.
- Itọju Iwadii: 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. Laasigbotitusita
Tí o bá ní ìṣòro pẹ̀lú tachometer rẹ, wo àwọn ìṣòro àti ìdáhùn tó wọ́pọ̀ wọ̀nyí:
| Isoro | Owun to le Fa | Ojutu |
|---|---|---|
| Ẹrọ naa ko ṣiṣẹ. | Awọn batiri ti o ku tabi ti ko tọ ti fi sori ẹrọ. | Ṣayẹwo polarity batiri. Rọpo pẹlu awọn batiri AAA tuntun. |
| Awọn kika aipe tabi aisedede. | 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. | Ifihan si awọn iwọn otutu giga. | Avoid using the tachometer on surfaces exceeding the probe's temperature resistance. Consider alternative measurement methods for high-temperature applications. |
9. Atilẹyin ọja ati Support
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 webojula. Tọju iwe-ẹri rira rẹ bi ẹri rira fun eyikeyi awọn ibeere atilẹyin ọja.