461830 - Tachometer Extech - Free user manual and instructions
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| Product Type | Tachometer |
| Brand | Extech |
| Model | 461830 |
| Measurement Type | Contact and Non-Contact |
| Measurement Range (RPM) | 0.1 to 99,999 RPM |
| Resolution | 0.1 RPM (0.1-999.9 RPM); 1 RPM (≥1000 RPM) |
| Accuracy | ±0.05% + 1 digit |
| Display | LCD, 5-digit |
| Backlight | Yes |
| Laser | Class II, <1 mW |
| Sampling Rate | 1 second |
| Memory | Max/Min/Last value |
| Auto Power Off | Yes, after 15 minutes |
| Power Supply | 9V battery (included) |
| Battery Life | Approximately 40 hours |
| Dimensions | 180 x 72 x 32 mm |
| Weight | 200 g (with battery) |
| Operating Temperature | 0 to 50°C (32 to 122°F) |
| Storage Temperature | -10 to 60°C (14 to 140°F) |
| Accessories | Cone tip, funnel tip, reflective tape, carrying case, manual |
Frequently Asked Questions - 461830 Extech
How do I measure RPM with the Extech 461830?
For non-contact measurement, apply reflective tape to the rotating object, aim the laser, and press the measure button. For contact measurement, attach the appropriate tip (cone or funnel) to the sensor and press against the rotating shaft. The RPM will be displayed on the LCD.
What is the maximum RPM I can measure?
The Extech 461830 can measure up to 99,999 RPM in non-contact mode and typically up to 20,000 RPM in contact mode with the standard tips.
How do I replace the battery?
Turn off the meter. Slide off the battery compartment cover located on the back. Replace the old 9V battery with a new one, observing polarity. Reattach the cover. Battery replacement is recommended when the battery icon appears.
Can I measure linear speed?
Yes, the Extech 461830 can measure linear speed in m/min or ft/min using the contact tip. Place the tip against a moving surface and the speed will be displayed.
Does the tachometer have a backlight?
Yes, the backlight can be turned on by pressing the backlight button. It helps in reading the display in low-light conditions.
What does the laser pointer do?
The laser pointer is used for targeting in non-contact mode. It indicates the spot where the measurement is being taken. Ensure the reflective tape is within the laser spot.
Is the laser safe for eyes?
The laser is Class II, safe for normal use. However, do not stare directly into the beam or point it at eyes. Avoid prolonged exposure.
How do I switch between contact and non-contact mode?
The Extech 461830 automatically detects the mode. When the contact sensor is plugged in, it switches to contact mode. Remove the sensor to use non-contact mode. The display indicates the active mode.
What is the accuracy of the tachometer?
The accuracy is ±0.05% + 1 digit for both contact and non-contact measurements. This ensures reliable and precise readings.
Where can I download the manual?
The manual is available for free download on notice-facile.com in the product page for Extech 461830. You can also find it on the Extech official website or other manual repositories.
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USER MANUAL 461830 Extech
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Product information
Brand : Extech
Model : 461830
Category : Tachometer