PMC MicroMag™ Electromagnet/Power Supply Specifications

Magnetic field measurement/control
Ranges30 Oe, 100 Oe, 300 Oe, 1 kOe, 3 kOe, 10 kOe, and 30 kOe full scale
Resolution0.005% of range in use, with 60% overrange
Accuracy2% of indication ±1 Oe
Noise5 mOe rms (100 ms averaging time)
Stability0.01% of full scale, ±0.02% of reading per °C
2 in electromagnet
Weight50 kg (110 lb)
Width610 mm (24 in), including bell cranks used to adjust magnet gap
Depth410 mm (16 in)
Height530 mm (21 in), including probe translation stages
Resistance4.0 Ω (cold)
Maximum current15 A
Water cooling2 L (0.5 gal)/min at full power
Air gapAdjustable, 10 mm to 76 mm (0.4 in to 3.0 in)
Poles51 mm (2 in) diameter
Pole capsTapered to 38 mm (1.5 in) diameter
Maximum field14 kOe at 12 mm (0.5 in) air gap, 10 kOe at 20 mm (0.75 in) air gap, with cryostat
Power supply for 2 in electromagnet
EnclosureRackmount chassis, 140 mm (5.5 in) height, 480 mm (19 in) width, 480 mm (19 in) depth
Weight11.4 kg (25 lb)
Input electrical power200/208/381/416 VAC (specify), 3-phase, 50/60 Hz, 3 kVa
Output±125 VDC at ±18 A
TypeBipolar, wideband switching-mode power amplifier
RegulationFeedback control of magnetic field
CoolingForced air
ProtectionMagnet coolant flow overtemperature, PS overcurrent, and overtemperature
4 in electromagnet
Weight261 kg (575 lb)
Width0.94 m (37 in), including bell cranks used to adjust magnet gap
Depth610 mm (24 in)
Height1.65 m (65 in), including probe translation stages and console
Resistance2.4 Ω (cold)
Maximum current30 A
Water cooling8 L (2.0 gal)/min at full power
Air gapAdjustable, 10 mm to 89 mm (0.4 in to 3.5 in)
Poles102 mm (4 in) diameter
Pole capsTapered to 51 mm (2.0 in) diameter
Maximum field22 kOe at 12 mm (0.5 in) air gap, 18 kOe at 20 mm (0.75 in) air gap, with cryostat
Power supply for 4 in electromagnet
EnclosureRackmount chassis, 140 mm (5.5 in) height, 480 mm (19 in) width, 530 mm (20.9 in) depth
Transformer enclosure (remote on casters), 400 mm (16 in) height, 560 mm (22 in) width, 510 mm (20 in) depth
WeightRackmount chassis 11.4 kg (25 lb); remote transformer enclosure 90 kg (200 lb)
Input electrical power200/208/381/416 VAC (specify), 3-phase, 50/60 Hz, 6 kVa
Output±140 VDC at ±32 A
TypeBipolar, wideband switching-mode power amplifier
RegulationFeedback control of magnetic field
CoolingForced air
ProtectionMagnet coolant flow overtemperature, PS overcurrent, and overtemperature