BARTINGTON INSTRUMENTSPage 5 of 18 OM2443/23. Safe UseWARNING: The PSU1 is fitted with AA size NiMH (Nickel Metal Hydride) rechargeablebatteries. Only AA size rechargeable batteries, which are specified as compatible in therelevant datasheet, can be used in this product.WARNING: The fitting of non-approved battery cells may be dangerous and could affect thesafety of users, damage the equipment and also invalidate the terms and conditions of theWarranty.WARNING: The PSU1 can also be powered by mains electricity and contains uninsulatedparts. Ensure that the unit is properly earthed at all times. Only properly trained personnelshould open the unit.WARNING: These products are not qualified for use in explosive atmospheres or lifesupport systems. Consult Bartington Instruments for advice.4. ApplicabilityCaution: This manual applies only to the PSU1 Power Supply Unit. For the earlierMag-03PSU, please use the manual supplied with that unit or contact the BartingtonInstruments helpdesk.5. Compatible MagnetometersCaution: Use of incompatible magnetometers may cause damage to the PSU1 and/or themagnetometer. The PSU1 is designed to operate with various Bartington Instrumentsmagnetometers. For the current list, refer to the datasheet.6. Introduction to the PSU16.1 SummaryThe PSU1 provides a battery backed power supply of ±12V for the Mag-03 series of three-axisfluxgate magnetic field sensors. It also contains filters for the analogue outputs of the sensor.