The Clamp-On Harmonic Meter Model F25 is a portable, battery operated power quality instrument. The Model F25 performs current and voltage measurement in True RMS as well as current and voltage in DC, and immediate readings of Total Harmonic Distortion (%THD), Individual harmonic orders through the 25th, Distortion Factor (%DF), Crest Factor (CF) and Peak of distorted currents and complex voltages. Displays Min, Max, and Average measurement values allowing recording for over 24 hours with an internal clock logging record time. Frequency (Hz) can be measured through either the current or the voltage. The slim clamp-on style makes it easy to work around crowded breaker panels and transformers.
 

• Designed for traditional and nonlinear loads.
• Simple clamp-on operation with power quality features.
• Accurate TRMS amps or volts (AC or AC + DC).
• Accurate DC measurements ( A or V).
• Recording mode stores: min, max, avg, max & peak.
• Direct reading of %THD, %DF, CF and Peak (+ or -).
• Display individual harmonic orders DC to 25th in A or V.
• Smooth function for stable readings.
• Auto or manual ranging.
• Peak measurements (AC or DC)(+ or -).
• K factor for proper transformer sizing.
• Percent ripple for DC.
• Transformer Harmonic Derating Factor (THDF).
• Frequency measurements in A or V.
• Auto-off feature.
• 31-segment analog bargraph.
• Low battery indicator.
• Battery voltage level check.
• Rugged Lexan construction.
• Audible control/warning indications.
• Built to UL, CSA, GS, VDE and IEC 1010 safety standards.
• Triple display.

• True RMS and DC voltage and current measurements.
• Determine levels of voltage and current distortion.
• Identify harmonic distortion patterns and sources of voltage harmonics.
• Locate sources of harmonic current.
• Measure individual harmonics.
• Identify nonlinear loads.
• Prevent overheating in electrical distribution equipment, false circuit breaker tripping.
• Power factor correction capacitor failure.
• Locate overloaded neutral wires.
• Derate transformers and generators to prevent overheating.
• Measure crest factor to evaluate harmonic content and determine CBEMA derating factor.

Model F25 Datasheet  PDF (167kb)