Jandel HM21 Manual
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PORTABLE COMBINED CONSTANT CURRENT SOURCE AND VOLTMETERJandel EngineeringLimitedHM21 Test UnitJandel Engineering offers the HM21 Test Unit for use in making four pointprobe measurements. The HM21 has six constant current settings between100nA and 10mA, and can be used to measure voltages from 0.01mV to1250mV.The quoted measurement range of the HM21 is from 1 ohm/square to 10Megohms/square (sheet resistance), from 0.01 ohm.cm to 10 Kohm.cm (bulkresistivity).*Measurements can be displayed as mV values or directly in sheet resistancevalues. Up to 50 readings can be stored in onboard non-volatile memory fordownloading to a PC using the free software included. The software can alsobe used to operate the unit directly from a PC, and to output results as sheetresistance, bulk resistivity, or ‘bulk resistivity for wafer’ values.The HM21 enables current to be passed in a forward and reverse direction toverify good contacts and measurements.Overall accuracy is 0.5%, highest accuracy is in the mid-range of measure-ments.Connection to a computer can be made via USB connection, and the unitcan be operated standalone, via a graphical interface in the free softwareprovided, or by computer keyboard commands.The HM21 can be powered using the supplied adapter or using four size AArechargeable batteries (supplied).Jandel EngineeringLimitedGrand Union HouseLeighton RoadLeighton BuzzardBeds.LU7 1LAPhone: +44 (0)1525 378554Fax: +44 (0)1525 381945E-mail: info@jandel.co.ukWeb: www.jandel.com* measurements outside this range are possible depending on sample type and possible reduced accuracy |
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