Extech Current Dataloggers

Extech Current Dataloggers

Current Dataloggers (or Data Logger, Data Recorder, Data Acquisition) refers to electronics designed to capture current signals over time for study and review later.

Benefits of Dataloggers/Data Recorders

• Quiet, unattended 24/7 operation
• Simple to setup and operate. Many portable models available
• Wide variety of measurement types and measurement speeds possible
• Help troubleshoot and identify problems in many fields
• Steady declining cost

Parts of a Current Datalogger/Data Recorder

• Included or accessory current clamps
• A/D or analog to digital converter and signal conditioning electronics
• Non-volatile storage memory for the collected data and a method to specify the storage rate and on some models the scan interval
• PC Communications or other method to move the data to a computer and to configure the unit
• Optionally a local display and keypad. Not always needed, so “blind” units are a cost saving

Considerations when purchasing a current datalogger

• Single or three phase current
• Max current and conductor size
• Logging duration and interval
• Sampling rate (some units may sample at one rate but log at a slower rate until a programmed alarm is tripped, for example)
• CAT rating for safety
• Neutral and ground current monitoring
• Intermittent problem detection
• Harmonic current monitoring
• Measure voltage also