The Simple Logger® II Model L261 is a one channel recording device powered by two alkaline batteries. Line tracking is performed such that 64 samples over one line cycle are taken. Frequency tracking is performed over the range of ±2Hz around the nominal line frequency 50 or 60Hz. Harmonic measurements are calculated from these 64 samples. Harmonics are only available from the Simple Logger® II Control Panel within the free DataView® software included with the unit. The Simple Logger® II records TRMS at a rate of up to eight times per second. The measurement process is performed no more than eight times per second. TRMS calculations are performed on a single line cycle. This means that the inputs are ignored between measurement intervals.
The main advantage of the logger is its ability to perform a variety of recording tasks with easy and intuitive setup from a computer using DataView® software.

Specifications

Channels - One
Input - 4mm safety banana jacks
Ranges (2) - 5 to 600VAC/AC+DC
Accuracy (50/60Hz) - 5 to 50V ±(0.5% Rdg +1V)
50 to 600V (0.5% Rdg +0.5V)
Resolution - 0.1VAC/AC+DC
Maximum Input Voltage - 1.2 x 600Vrms or 720Vrms
Input Impedance - 40MΩ
Sample Rate - 64 samples / cycle
Storage Rate - Programmable from 125ms to 1 per day
Storage Modes - Start/Stop, FIFO, extended mode (XRM) and Alarm
Recording Length - 15 minutes to 6 weeks, programmable using DataView
Memory - 240,000 measurements (512KB). Recorded data is stored in non-volatile memory and will be retained even if battery is low or removed.
Communication - USB 2.0 optically isolated
Power Source - 2x1.5V AA (LR6) alkaline batteries
Battery Life - 100 hours to >45 days (depending of sample rate/recording length)

Parameter Name	Parameter Value
Type	event
Measured physical value	current
Number of channels	1-channel
Other characteristics	USB programmable