AS ONE RM-2000 Non-Contact Tachometer

Overview

The AS ONE RM-2000 Non-Contact Tachometer is a precision optical instrument engineered for reliable, repeatable rotational speed measurement without mechanical coupling or physical contact with the rotating surface. It operates on the principle of reflective photoelectric sensing: an integrated LED emits modulated infrared light toward a target surface marked with standard reflective tape; the photodetector captures periodic intensity variations caused by tape passage, and the internal microprocessor calculates rotational frequency based on time-of-flight and pulse interval analysis. Designed for laboratory, production line, and field service environments, the RM-2000 delivers high reproducibility across a broad dynamic range—from low-speed conveyors and ventilation fans to high-speed spindles and centrifuge rotors—while maintaining traceable accuracy compliant with JIS C 1202 and IEC 60068-2 environmental test standards for portable instrumentation.

Key Features

• Wide measurement range: 6.0 to 99,999.9 rpm with 0.1 rpm resolution, supporting both slow-turning industrial components and rapidly rotating precision machinery.
• High-accuracy optical sensing with stated uncertainty of ±(0.01% of reading + 1 digit), verified under controlled calibration conditions per ISO/IEC 17025-accredited procedures.
• Adjustable sampling interval (1.0–10.0 seconds) enables optimization for transient monitoring or stable averaging—critical for validating steady-state operation in QC audits.
• Compact, handheld form factor (58 × 28 × 122 mm; ~140 g) with ergonomic grip and low-power LED optics, facilitating extended use in confined spaces or elevated work platforms.
• Automatic range selection eliminates manual scale switching, reducing operator error and accelerating measurement cycles during multi-point inspections.
• Robust 6-digit LCD display with high-contrast segment rendering ensures legibility under variable ambient lighting, including fluorescent-lit cleanrooms and outdoor daylight conditions.

Sample Compatibility & Compliance

The RM-2000 requires application of standardized reflective tape (supplied: 10 pieces, 12 mm × 50 mm, 3M Scotchcal™-compatible adhesive) to the rotating surface. Tape reflectivity must meet ASTM E284-22 minimum specular reflectance criteria (>75% at 850 nm) to ensure signal-to-noise ratio >40 dB across the full operating distance (50–300 mm). The device complies with EMC Directive 2014/30/EU (EN 61326-1:2013) and Low Voltage Directive 2014/35/EU (EN 61010-1:2010), making it suitable for use in regulated manufacturing facilities operating under ISO 9001:2015 and ISO 13485 quality management systems. Battery-powered operation supports intrinsically safe deployment in Class I, Division 2 hazardous locations where mains-powered instruments are prohibited.

Software & Data Management

While the RM-2000 operates as a standalone field instrument with no embedded data logging or PC interface, its measurement protocol is fully compatible with external digital recording workflows. Users may manually record values into LIMS or MES systems using standardized templates aligned with ASTM E29-22 (Standard Practice for Using Significant Digits in Test Data). For automated traceability, the device’s consistent output format (6-digit numeric display with decimal point positioning) supports OCR-based capture via mobile applications validated per FDA 21 CFR Part 11 Annex 11 requirements. Calibration records—including date, technician ID, reference standard (e.g., Fluke 5520A calibrator), and deviation logs—are retained per GLP/GMP documentation protocols.

Applications

• Verification of motor and pump rotational speeds during preventive maintenance in pharmaceutical water systems (USP ).
• Validation of centrifuge rotor RPM prior to sterile filtration runs in bioprocessing suites.
• Speed profiling of HVAC fan arrays during commissioning per ASHRAE Guideline 1-2021.
• Calibration cross-check of encoder-based feedback loops in CNC machine tools.
• Field verification of turbine generator shaft rotation in distributed energy installations.
• Educational lab use for kinematics and dynamics experiments requiring non-intrusive velocity acquisition.

FAQ

What type of reflective tape is required?
Standard high-reflectivity vinyl tape (e.g., AS ONE Ref. #1-6393-02 or 3M 7610) with ≥75% reflectance at 850 nm is mandatory; matte or metallic surfaces without tape yield unreliable readings.
Can the RM-2000 measure through transparent barriers?
No—glass, acrylic, or polycarbonate shields attenuate the optical path and introduce phase shift errors; direct line-of-sight to the taped surface is required.
Is battery life specified under continuous operation?
With alkaline AA cells, typical operational endurance exceeds 20 hours at 2-second sampling intervals and 25°C ambient temperature; low-battery indication appears 30 minutes prior to cutoff.
Does the unit support analog output or Bluetooth connectivity?
No—the RM-2000 is a self-contained optical tachometer with no communication interfaces; it is designed exclusively for visual readout and manual data entry workflows.
How often should calibration be performed?
Annual calibration is recommended for routine QA use; however, facilities subject to FDA or ISO 17025 accreditation must perform calibration before each critical batch run or per internal SOP-defined intervals (typically every 3–6 months).