2900 Series Specifications

See sample data for the 2900 Series AGM
Magnetic moment measurement
Range
1 µemu to 5 emu full scale
Resolution
0.005% of full scale with 60% overrange capability
Accuracy
2% vs. calibration
Sensitivity10 nemu standard deviation (room temperature operation, 1 s averaging time)
Stability
≤10-4/h at constant ambient temperature
Repeatability
1% standard deviation (sample undisturbed); 2% standard deviation (sample removed and replaced)
Gradient field
x-axis coils (0.5 in air gap): 15 Oe/mm, 1.5 Oe/mm, 150 mOe/mm (typical, over 3 ranges)
Displacement amplitudeTypically in the range of 1 nm to 10 µm
Transducer probes
P1General purpose, (x-axis, samples up to 4 × 4 × 1 mm), mass ≤50 mg
P2Intermediate, (x-axis, samples up to 5 × 5 × 1 mm), mass ≤50 mg
P3Robust, (x-axis, samples up to 5 × 5 × 2 mm), mass ≤200 mg
Z1Z-axis, (samples up to 4 × 4 × 1 mm), mass ≤100 mg
Utilities
Total system cooling water power dissipation
1.5 kW at 50 or 60 Hz — see list of available recirculating chillers
 
Optional variable temperature cryostat—DISCONTINUED
TypeContinuous flow (liquid helium)
Temperature range10 K to 473 K
Temperature accuracy±1% of set temperature at ±1 K
Resolution100 mK
Cryostat cooldown time30 min to 10 K
Sample cooldown time2 min to 10 K (cold cryostat)
Cryostat inside diameter6 mm (sample zone)
Cryostat outside diameter11 mm (magnet air gap, 20 mm)
Temperature sensorChromel vs. Au 0.07 atomic % Fe, located approximately 10 mm below sample
SensitivityStandard deviation at 1 s averaging time:
10 to 50 K: <5 µemu;
51 to 100 K: <1 µemu;
101 to 473 K: <50 nemu
Temperature slew rateApproximately 5 min full span
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