Extech RPM33 Tachometer
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Product Information
Full details
The Extech RPM33 is a versatile contact and laser photo tachometer for technicians and engineers needing precise measurements of rotational speed, surface speed, and length. Its key benefit is offering both contact and non-contact measurement modes with high resolution for accuracy. A potential caveat is the need for reflective tape for laser measurements on certain surfaces.
All features
| Model Part Number | RPM33 |
|---|---|
| Brand | Extech |
Extended Product Information
FAQs
What is the measurement range for RPM?
The Extech RPM33 can measure RPM from 5 to 99,999 RPM.
Can I measure surface speed directly?
Yes, using the contact wheel accessory, you can measure surface speed in feet per minute (FPM) or meters per minute (m/min).
How do I switch between laser and contact modes?
The device automatically detects the mode based on whether the contact probe is attached or if laser measurement is being used. For laser, ensure no contact probe is attached.
How many readings can the tachometer store?
It can store up to 10 sets of readings, each containing the measurement, maximum, minimum, and average values.
What is the warranty period for the Extech RPM33?
The product comes with a 1-year warranty from the date of purchase.
Do I need special accessories for laser measurements?
For best results on non-reflective surfaces, you will need to apply the included reflective tape to the object being measured.
Troubleshooting
Device not turning on
Ensure the LR44 battery is correctly installed and has sufficient charge. Check battery contacts for corrosion.
Inaccurate RPM readings (laser mode)
Verify that reflective tape is applied to the rotating object and is within the laser's line of sight. Ensure the distance is appropriate (within 500mm) and the surface is not excessively glossy or transparent.
Inaccurate RPM readings (contact mode)
Confirm the contact wheel is securely attached and making firm contact with the rotating surface. Check that the wheel is clean and free from debris.
Display is dim or unreadable
Check the battery level and replace if necessary. Ensure the backlight is activated. Clean the LCD screen with a soft cloth.
Pros and Cons
Pros
- Offers both contact and non-contact measurement methods.
- High accuracy due to microprocessor and quartz crystal oscillator.
- Stores multiple data sets for analysis.
- Backlit display enhances readability.
- Includes essential accessories for immediate use.
Cons
- Requires reflective tape for accurate laser measurements on some surfaces.
- Limited to 10 data sets for storage.
- Battery type (LR44) may require frequent replacement depending on usage.
Setup, Compatibility & Care
Setup:
- Insert the LR44 battery into the designated compartment.
- For laser measurements, ensure the target surface is clean. Apply the provided reflective tape to the rotating object if the surface is non-reflective or dark.
- For contact measurements, attach the contact wheel to the appropriate probe.
Compatibility:
The tachometer is designed for general industrial and maintenance use. It is compatible with rotating objects for RPM measurement and linear surfaces for speed and length calculations. Ensure the object's surface is suitable for either contact or laser measurement methods.
Care:
- Keep the device clean by wiping it with a dry or slightly damp cloth. Avoid abrasive cleaners.
- Store the tachometer in its soft case when not in use to protect it from dust and damage.
- Remove the battery if the device will not be used for an extended period.
- Clean the laser lens and contact wheel regularly for optimal performance.