まぐれ 378 PQ 電力品質スクリーニング機能付き FC 非接触 True-RMS クランプメーター

Troubleshooting of industrial control, motors and inverter power distribution, plus harmonic screening and three-phase testing. It shares identical hardware with the 377 FC, while the 378 FC exclusively features PQ power quality indication.

Core Technology: FieldSense™ Electric Field Sensing Technology. No physical contact between the clamp jaw and live conductors. Simply connect a ground lead to measure voltage and current simultaneously, greatly reducing electric shock risks.

主な仕様

安全性評価: CAT III 1000 V / CAT IV 600 V

Clamp Jaw AC Current: 0～999.9 A, 解決 0.1 あ; 正確さ 2% ±5 digits (45–66 Hz)

iFlex Flexible Probe (Standard i2500-18, 1.8 メートル): AC 0～2500 A, ideal for busbars, compact switchgear and large cables

DC Voltage: 0～1000 V; AC Voltage: 0～1000 V (direct probe measurement); FieldSense non-contact voltage up to 1000 V

周波数範囲: 5 Hz～500 Hz, インバーター対応, variable-speed motors and UPS systems

抵抗: 60 kΩ; Capacitance: 1000 μF; Continuity beep; Inrush startup current capture, MIN/MAX/Average value recording

True-RMS (TRMS) 測定, designed for non-linear loads such as inverters, servo drives and switching power supplies

Jaw Opening: 34 mm; 正味重量: 463 g; 電源: 2×AA batteries, battery life 200 時間

Wireless Connectivity: まぐれ Connect Bluetooth. Save data, perform automatic three-phase calculations, phase sequence verification and cloud storage via mobile APP

Exclusive Functions (Difference from 377 FC)

✅ PQ Power Quality Indicator: Automatically detects voltage, current and power factor anomalies under FieldSense mode. Quickly identify whether the fault originates from upstream grid supply or downstream motor/inverter loads (early warning for harmonics, three-phase imbalance and poor power factor)

✅ Automatic Three-Phase Test: Complete three-phase measurement in 3 ステップ. The APP automatically calculates line-to-ground, line-to-line voltages, phase sequence and unbalance without manual recording and calculation

✅ Inrush Startup Current: Capture the closing surge current of motors and compressors to diagnose mechanical jamming and faulty starting circuits

標準付属品

まぐれ 378 FC Clamp Meter Main Unit

i2500-18 iFlex Flexible Current Probe (1.8 メートル)

TL224 Test Leads, TP175 TwistGuard Test Probes, AC285 Grounding Clip (required for FieldSense function)

TPAK Magnetic Hanging Kit, Hard Carrying Case, ユーザーマニュアル

モデルの比較 & セレクションガイド

377 FC: Equipped with FieldSense, without PQ power quality screening, focused on safe and fast voltage & current measurement

378 FC: With PQ harmonic & energy efficiency screening, the top choice for maintenance of inverters, air compressors and fans

376 FC: Traditional clamp meter, no FieldSense non-contact voltage function, voltage measurement only via test probes

注文番号: 5111812 (FLUKE-378 FC)

代表的な用途 (オートメーション / 空調設備 / Low-Voltage Assemblies)

Harmonic and three-phase current imbalance screening for inverter and servo drive outputs

Measurement of startup current and locked-rotor diagnosis for three-phase motors, エアコンプレッサー, water pumps and fans

High-current testing on low-voltage switchgear, busbars and large cables (2500 A via iFlex probe)

予知保全, power quality pre-screening and fault location (grid side vs equipment side)

Commissioning and phase sequence verification for star-delta and soft-start circuits

制限事項 & 注意事項

FieldSense mode requires reliable grounding. Poor grounding will cause inaccurate voltage readings; only works on single-phase conductors
The PQ function is only a screening indicator, providing pass/alarm alerts only. It cannot replace professional power quality analyzers (Fluke 43B / 437-Ⅱ) for detailed THD harmonic reports
The iFlex flexible probe has a higher minimum measuring current and is not suitable for measuring tens of milliamps small currents
FieldSense cannot be used for DC voltage measurement

アップグレード & 代替オプション

Brand Upgrade: Fluke 43B / 437-II Power Quality Analyzer (for detailed harmonic analysis and waveform recording)

国内相当: High-end clamp meters with flexible probes, Bluetooth and harmonic screening (注記: no FieldSense non-contact voltage function)

スペアパーツ: Separate i2500-18 probe, TP175 test probes, AC285 grounding clip

Fluke 378FC / 377FC / 376FC Note

For detailed harmonic reports, fine harmonic waveform recording and transient disturbance testing, you need professional instruments such as the Fluke 43B / 437-Ⅱ.

If you frequently maintain inverters, three-phase motors and water chillers, and require safe non-contact measurement plus fast power quality troubleshooting, choose the 378 FC. If you only need non-contact measurement without PQ screening, を選択します 377 FC.

FC = Fluke Connect Bluetooth wireless for mobile APP data logging; non-FC models are wired-only versions.

全モデルリスト (Fluke Clamp Meters)

Industrial High-End Series (370 シリーズ, TRMS AC/DC + iFlex high-current)

Non-Contact Voltage Models (FieldSense for safer cabinet testing)

377 FC: Non-contact voltage & current measurement, no PQ harmonic screening

378 FC (あなたのモデル): 377 FC plus PQ power quality harmonic screening, preferred for inverters & モーター

Standard Wireless Models (No Non-Contact Voltage)

374 FC: 600 A AC/DC, supports iFlex (flexible probe not included)

375 FC: Built-in VFD low-pass filter for more accurate inverter measurement (no iFlex included)

376 FC: 1000 A AC/DC, standard with i2500 iFlex probe, 最大 2500 そしてAC

Remote Detachable Display

381: Separable display for one-person operation in high-altitude and tight spaces, standard with iFlex

Industry-Specific Models
HVAC Special: 902 FC

For refrigeration, fans and heat pumps, with temperature measurement, CAT IV 300 V rating

PV New Energy Special: 393 FC

CAT III 1500 V DC rating, designed for PV string DC testing

Leakage Current Meters (Ground Leakage & Neutral Harmonic Current)

368 / 369 FC: Large jaw micro-amp leakage clamp meters, used for equipment earth leakage and neutral line current testing

Detachable Jaw for Tight Wiring Harnesses: 365

Separate jaw via flexible cable to access dense wiring; 200 A AC/DC true-RMS

General Economy Models (Daily Electrician Inspection)
Ultra-Thin Blade Jaw (narrow wiring): 301A/301C (交流のみ), 301D/301E (AC+DC)
High Current for Automotive & パワーシステム: 317, 319 (1000 A AC/DC TRMS)
Heavy-Duty High-Current Industrial Models: 353, 355 (2000 あ, for transformers and busbars)
Complete Full Model List