7400-S Series VSM Specifications

 
 7404-S7407-S7410-S
Magnet pole cap face diameter50 mm (2.0 in)50 mm (2.0 in)50 mm (2.0 in)
APPLIED FIELD STRENGTH (±1%)
Room temperature
3.5 mm (0.14 in) sample access
2.63 T3.05 T3.42 T
10 mm (0.4 in) sample access
2.27 T2.72 T3.16 T
16 mm (0.64 in) sample access
1.94 T2.46 T2.92 T
With oven or cryostat option
6.4 mm (0.25 in) sample access
1.49 T2.12 T2.59 T
With single-stage variable temperature option
6.4 mm (0.25 in) sample access
1.75 T2.28 T2.76 T
MOMENT MEASUREMENT
Noise floor (emu RMS)
Room temperature
 
0.1 TC; 0.1 s/pt
(no averaging)
450 nemu
0.1 TC; 1 s/pt175 nemu
0.1 TC; 10 s/pt60 nemu
With oven or cryostat option,
0.1 TC, 10 s/pt
2.5 µemu
With single stage variable
temperature option 0.1 TC, 10 s/pt
1.25 µemu
With vector option 0.1 TC, 10 s/pt5 µemu
Dynamic range1 × 10-7 to 103 emu
Time constants (TC)0.1, 0.3, 1.0, 3.0, or 10.0 s
Moment stability1Less than 0.05% RMS of full scale/day at constant field, constant temperature, and highest range after a 5 h warm-up period
ReproducibilityBetter than ±0.5%, or ±0.1% of full scale, fixed rotation angle and range, with sample replacement
Moment accuracyBetter than 1% of reading ±0.2% of full scale with a geometrically identical test sample and calibrant
Sample mass0 to 10 g (higher mass can be accommodated with decreased performance)
FIELD MEASUREMENT
Field accuracy1% of reading or ±0.05% of full scale
Field resolution
2800 kA/m (35 kOe)
8 A/m (0.1 Oe)
280 kA/m (3.5 kOe)0.8 A/m (0.01 Oe)
28 kA/m (350 Oe)0.08 A/m (0.001 Oe)
Closed loop field control stability<0.05% RMS of full scale/h
MANUAL ROTATION
Setting resolution<1°
Setting reproducibility<1°
Rotation range0 to 730°
CERTIFICATIONS
CEyes
Application of Council directives2006/95/EC LVD
2004/108/EC EMC
Standard to which conformity is declaredEN-61010-1:2010 - Overvoltage II, Pollution Degree 2 - LVD
EN 61326-1:2013 - Class A, Annex B - EMC
UTILITIES
Total system cooling water power dissipation (50 or 60 Hz) — see available recirculating chillers4.25 kW13.4 kW13.4 kW
1 Tested with an AlNiCo sample in a 1 in sensing coil gap after system warm-up period with the sample vibrating at field.
The AlNiCo samples’ moment must be >50% of full scale moment range.
 
7400-S Series VSM Equipment
 
 7404-S7407-S7410-S
VSM head driveModel 740H
VSM frame1
Control electronicsModel 736-S
Linear amplifierModel 142
Bipolar magnet power supplyModel 643Model 648
ModeDC current source
Maximum output±35 V/±70 A (2,450 W)±75 V/±135 A (9.1 kW nominal)
AC line input200/208 VAC ±10%, 13 A/phase;
220/230 VAC ±10%, 12 A/phase;
380 VAC ±10%, 7 A/phase;
400/415 VAC ±10%, 6.5 A/phase at 50/60 Hz

200 VAC ±10%, 41 A/phase;
208 VAC ±10%, 40 A/phase;
220 VAC ±10%, 38 A/phase;
230 VAC ±10%, 37 A/phase;
380 VAC ±10%, 23 A/phase;
400 VAC ±10%, 21 A/phase;
415 VAC ±10%, 21 A/phase

Cooling water requirementsTap water or closed cooling system
(optional chiller available) +15 °C to +25 °C
Tap water or closed cooling system
(optional chiller available) +15 °C to +25 °C
Flow rate5.7 L (1.5 gal)/min minimum7.6 L (2.0 gal)/min minimum
Pressure drop10 kPa (1.5 psi) at 5.7 L (1.5 gal)/min
minimum for power supply only
159 kPa (23 psi) at 7.6 L (2 gal)/min
minimum for power supply and mandatory flow switch
ElectromagnetModel EM4-HVAModel EM7-HVModel EM10-HV
Pole diameter100 mm (4 in)180 mm (7 in)250 mm (10 in)
Pole cap face diameter 50 mm (2 in)50 mm (2 in)50 mm (2 in)
Field homogeneity ±0.1% over 1 cm3 (0.06 in3)±0.1% over 1 cm3 (0.06 in3)±0.1% over 1 cm3 (0.06 in3)
Cooling water requirements Tap water or closed cooling system
(optional chiller available)
Tap water or closed cooling system
(optional chiller available)
Tap water or closed cooling system
(optional chiller available)
Inlet temperature 15 – 25 °C (59 – 77 °F)15 – 25 °C (59 – 77 °F)15 – 25 °C (59 – 77 °F)
Flow rate 7.6 L (2 gal)/min11.4 L (3 gal)/min15 L (4 gal)/min
Pressure drop 200 kPa (30 psi)250 kPa (36 psi)200 kPa (30 psi)
Water chiller capacity2.5 kW (8,530 BTU)/h5 kW (17,060 BTU)/h8.8 kW (30,035 BTU)/h
Hall probe High sensitivity; 102 mm (4 in) aluminum stemHigh sensitivity; 203 mm (8 in) aluminum stem
Pick-up coils741SC and 741LC
Instrument console483 mm (19 in) rack
Computer with IDEAS™ softwareModel 740906
 
 
7400-S Series VSM Options Specifications
Model 74018 variable temperature cryostat
With LHeTemp range4.2 K (base), 5.5 K to 450 K (control)
Temp stability±0.1 K
With LN2Temp range77.6 K (base), 85 K to 450 K (control)
Temp stability±0.2 K
Temperature resolution0.001 K
Cool-down time5 min (15 min initial cool-down)
Nominal ramp rateContinuous flow
LHe liquid usage<1 L/h when operating >7 K
LN2 liquid usage<1 L/h when operating >85 K
InsulationVacuum
Sample zone dimensions Bore size7.1 mm (0.28 in)
Outside diameter22.4 mm (0.88 in)
More information about VSM options
 
Model 74033 autorotation
Full range of rotation-10 to 730°
Setting resolution<1°
Setting repeatability<1°
More information about VSM options
 
Model 74034 high temperature oven
Temperature range303 K to 1,273 K
Temperature stability±0.1 K
Temperature resolution0.001 K
Maximum ramp rate80 K/min at maximum heating rate of 80 W
InsulationVacuum plus multiple reflective shields
Sample zone dimensions Bore size7.1 mm (0.28 in)
Outside diameter19 mm (0.75 in)
More information about VSM options
 
Model 74035 single stage variable temperature option
Temperature range78 K (base), 100 K to 950 K (control)
Temperature stability0.1 K RMS when operated with argon (high temperature) and 0.9 K RMS when operated with nitrogen (low temperature)
Temperature resolution0.001 K
GassesLN2 and nitrogen gas for T<350 K;
argon for T>350 K
Cool-down time15 min from room temp to 100 K,
40 min from 950 K to room temp
Nominal ramp rate
(in the domain)
5 K/min
Hold timeContinuous flow
LN2 liquid usageTBD
Nitrogen gas usage3.2 L/min 100 K to 350 K
Argon gas usage3.6 L/min
InsulationVacuum
Sample zone dimensions Bore size7.1 mm (0.28 in)
Outside diameter17.8 mm (0.7 in)
More information about VSM options
 
Model 74046 magnetoresistance (MR) probe
Number of probes 4
Probe pin to pin spacing0.9 mm
Total 4-pin spacing2.7 mm
Nominal sample size4.5 mm × 4.5 mm cross-section, maximum height 3 mm
Temperature range20 K to 673 K
Current ranges6 ranges; 1 µA to 100 mA
Resistance ranges9 ranges: 0.2 Ω, 2 Ω, 20 Ω, 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ, up to 10 MΩ
Probe tip compliance voltage0 V to 5 V, measurement
0 V to 100 V, contact formation
More information about VSM options
 7404-S or 74047407-S or 74077410-S or 7410
Model 74032XY standard vector coils2
Pole caps100 mm (4 in)100 mm (4 in)100 mm (4 in)
Air gap50.8 mm (2 in)50.8 mm (2 in)50.8 mm (2 in)
Maximum applied field7.7 kOe (0.77 T)12.5 kOe (1.25 T)20 kOe (2.0 T)
RMS noise (Y coils)5 µemu5 µemu5 µemu
Sample access25 mm (1 in)
Torque density minimum
(at maximum applied field)
38 × 10-3 dyn•cm62 × 10-3 dyn•cm60 × 10-3 dyn•cm
2 Requires large diameter pole caps; sold separately for 7400 Series systems
More information about VSM options