Power Requirements and Charging the PSY1 Internal BatteryThe PSY1 is a self contained instrument that incorporates a lithium polymerbattery. Before using the instrument, this battery MUST be charged.To choose from a range of charging options see :Connecting a Power Supply to the Instrument (pages 7 to 11).The unique power-bus plug design was developed by ICT International tosimplify the electrical wiring process. It minimises the need for custom tools inthe field, requiring only that the outer cable sheath be stripped back to exposethe copper wire. See section: Connecting a Power Supply to the Instrument(page 7) No other tools are required with all necessary components fullyincorporated into the instrument design. Retaining straps ensure that thepower-bus plugs do not separate from the instrument when removed from thepower-bus during wiring preparation and connection of external power.6ICT InternationalEnabling better global research outcomes in soil, plant & environmental monitoring.The PSY1 can be charged from a range of external voltages via the Bus Plugs,however there are limits. For the PSY1 to correctly charge, the external powersupply must be within a voltage range of 8Volts DC to 30Volts DC at alltimes. If the voltage falls below 8Volts DC the logger will automatically stopusing the supply to charge the internal battery. 30Volts DC is a predeterminedmaximum voltage that the PSY1 can handle. Supply voltages that exceed thislevel are not recommended and may cause accidental triggering of theprotection circuitry. Triggering this circuit may result in semi-permanentdisabling of the external power which will require the PSY1 to be sent back toICT for repair.