FLIR CM55 10-Inch Flexible-Loop Clamp Meter
| Brand | FLIR |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Origin Category | Imported |
| Model | FLIR CM55 |
| Pricing | Available Upon Request |
Overview
The FLIR CM55 10-inch Flexible-Loop Clamp Meter is an engineered solution for non-intrusive AC current measurement in constrained, high-density electrical environments. Unlike conventional rigid-jaw clamp meters relying on magnetic induction via fixed ferrous cores, the CM55 employs a precision-wound, low-hysteresis flexible Rogowski coil sensor—optimized for accurate RMS current sensing across frequencies from 50 Hz to 1 kHz. Its 25.4 cm (10-inch) loop circumference enables deployment in tight enclosures, deep panel interiors, and around irregularly shaped conductors where rigid clamps cannot physically close or maintain consistent coupling. Designed to meet CAT III 600 V safety requirements per IEC 61010-1, the CM55 supports field-deployable diagnostics without circuit interruption, making it suitable for commissioning, preventive maintenance, and energy auditing workflows in commercial and industrial facilities.
Key Features
- 10-inch (25.4 cm) flexible Rogowski coil with integrated signal conditioning electronics—enabling repeatable ±2% accuracy at 50/60 Hz and improved phase linearity up to 1 kHz.
- Ergonomic, one-handed operation with contoured housing and tactile button layout optimized for gloved use in live-panel environments.
- Dual high-intensity white LED work lights (120 lumens total), independently switchable, providing targeted illumination inside dark enclosures without casting shadows on terminal blocks or busbars.
- Integrated Bluetooth 5.0 radio supporting BLE 4.2 protocol—enabling secure, low-latency streaming of real-time current waveforms and RMS values to iOS and Android devices.
- Anti-tangle coil design with reinforced polyurethane jacket and memory-free conductor winding—reducing deployment time and minimizing mechanical fatigue during repeated coiling/uncoiling cycles.
- Multi-unit wireless synchronization capability: Up to four CM55 units can be simultaneously paired and time-aligned via FLIR Tools Mobile for balanced three-phase + neutral current profiling.
Sample Compatibility & Compliance
The CM55 is compatible with insulated conductors up to 38 mm in diameter and performs reliably on single-core cables, multi-conductor bundles, and busbar configurations—provided the loop fully encircles the net current path. It is not intended for DC current measurement or for use on unshielded high-frequency switching circuits (e.g., VFD outputs above 5 kHz). The instrument complies with IEC 61010-1:2010 (CAT III 600 V, Pollution Degree 2), EN 61326-1:2013 (EMC for industrial environments), and RoHS 3 Directive 2015/863/EU. Its firmware architecture supports audit-ready data logging with timestamped metadata, aligning with GLP-compliant documentation practices for facility maintenance records.
Software & Data Management
FLIR Tools Mobile (v5.2+) provides native support for CM55—including waveform capture at 2.5 kS/s, harmonic spectrum analysis (up to 25th order), and customizable alarm thresholds based on RMS deviation or crest factor. All measurements are stored locally on-device with optional cloud sync to FLIR Ignite™ (encrypted AES-256). Export formats include CSV (for Excel or MATLAB post-processing), PDF reports with embedded thermal reference images (when used alongside FLIR thermal cameras), and .flr project files retaining full traceability—user ID, GPS coordinates, device serial number, and calibration expiration date. Audit trails comply with FDA 21 CFR Part 11 requirements when configured with user authentication and electronic signature workflows.
Applications
- Electrical commissioning of HVAC motor drives, UPS systems, and lighting ballasts—verifying load balance and identifying harmonic distortion sources.
- Preventive maintenance of MCCs and switchgear—detecting anomalous current draw indicative of failing contactors, degraded insulation, or loose terminations.
- Energy submetering in LEED-certified buildings—capturing baseline consumption profiles for individual tenant panels or critical infrastructure circuits.
- Field validation of arc-fault circuit interrupter (AFCI) and ground-fault circuit interrupter (GFCI) trip thresholds using synchronized multi-phase current monitoring.
- Technical training and apprenticeship programs—demonstrating Kirchhoff’s Current Law in live distribution scenarios with minimal PPE overhead.
FAQ
Does the CM55 measure DC current?
No—the CM55 utilizes a passive Rogowski coil principle and is designed exclusively for AC current measurement within the 50 Hz–1 kHz range.
Can the flexible loop be calibrated independently of the meter body?
No—the coil and electronics are factory-matched as a single calibrated assembly; replacement requires full unit recalibration per ISO/IEC 17025-accredited procedures.
Is the Bluetooth connection encrypted?
Yes—pairing uses AES-128 encryption, and all transmitted measurement packets include CRC-32 integrity checks to prevent unauthorized interception or data corruption.
What is the maximum conductor temperature the loop can withstand during continuous measurement?
The coil jacket is rated for continuous operation at ≤70 °C ambient; brief exposure up to 90 °C is permissible for <5 minutes per measurement cycle.
Does FLIR Tools Mobile support offline operation?
Yes—waveform capture, trend logging, and report generation function fully offline; synchronization with cloud services occurs only upon reconnection to Wi-Fi or cellular networks.
