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