owner’s manual for use with models 10, 20, 30 39Device InformationENSpecificationsWaterresistanceRugged plastic,waterproof to IEC60529 IPX7Battery type 2 AA batteries,(alkaline, NiMH, lithium,or precharged NiMH)Battery Life Up to 25 hoursOperatingtemperaturerangeFrom -4°F to 158°F(-20°C to 70°C)About the BatteriesWARNINGThe temperature rating for thedevice (page 39) may exceed theusable range of some batteries.Alkaline batteries can rupture athigh temperatures.Do not use a sharp object toremove batteries.CAUTIONContact your local waste disposaldepartment to properly recycle thebatteries.NOTICEAlkaline batteries lose a significantamount of their capacity astemperature decreases. Therefore,use lithium batteries whenoperating the device in below-freezing conditions.Maximizing Battery LifeYou can do various things toincrease the battery life.• Leave the backlight off when notneeded.• Lower the backlight brightness(page 38).• Decrease the backlight timeout(page 38).
