The operating voltage is 9.6 to 16 Vdc. The datalogger will shut down at 9.6 Vdc. When this happens, a counter is incremented in the datalogger Status table (low12Vcount). In general, 12 to 14 Vdc is a normal range. Voltages above 16 Vdc could damage the datalogger and cause bad measurements. Therefore, the resulting data should be reviewed carefully. Sustained voltages in excess of 16 Vdc can damage the datalogger and the wiring panel.