Lake Shore 420, Руководство пользователя

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Lake Shore Model 420 Gaussmeter User’s Manual
A-6
Appendix A
B5.0 SPECIFICATIONS
This section covers three types of Hall generators available from Lake Shore: HGCA & HGCT Series
Cryogenic Hall generators (Figures B-5 and B-6) with specifications (Table B-1), HGA Series Axial Hall
generators (Figures B-5 and B-7) with specifications (Table B-2), and HGT Series Transverse Hall generators
(Figures B-8 thru B-10) with specifications (Table B-3).
0.105 in.
+B
9.5 in.
(min.)
0.20 in.
0.25 in.
diameter
0.20 in.
diameter
Figure B-5 Axial Hall Generator HGA-3010, HGA-3030, and HGCA-3010 Dimensions
0.240 in.
(max.)
+B
0.63 in.
9.5 in (min.)
(Lead Length)
Protective
Ceramic Case
Center of
Active Area
0.180 in.
0.043 in. (max.)
Figure B-6 Transverse Hall Generator HGT-3010, HGT-3030, and HGCT-3020 Dimensions
Table B-1 Cryogenic Hall Generator Specifications
Cryogenic HGCA-3020 HGCT-3020
Description Cryogenic axial; phenolic package Cryogenic transverse; ceramic package
Active area 0.030 inch diameter circle 0.040 inch diameter circle
Input resistance 1 ohm 1 ohm
Output resistance 1 ohm 1 ohm
Nominal control current (I
CN
) 100 mA 100 mA
Maximum continuous current
(non-heat sinked) 300 mA 300 mA
Magnetic sensitivity (I
C
= nominal control
current)
0.56 to 1.04 mV/kG 0.56 to 1.04 mV/kG
Maximum linearity error
(sensitivity vs field) ±1.0% RDG (-30 to +30 kG)
±2.0% RDG (-150 to +150 kG) ±1.0% RDG (-30 to +30 kG)
±2.0% RDG (-150 to +150 kG)
Zero field offset voltage (I
C
= nominal
control current)
±200 µV (max.) ±200 µV (max.)
Operating temperature range 4.2 K to 375 K 4.2 K to 375 K
Mean temperature coefficient of magnetic
sensitivity ±0.01%/K (approx.) ±0.01%/K (approx.)
Mean temperature coefficient of offset (I
C
= nominal control current)
±0.4 µV/K (max.) ±0.4 µV/K (max.)
Mean temperature coefficient of resistance ±0.6%/K (max.) ±0.6%/K (max.)
Leads 34 AWG copper w/Teflon insulation 34 AWG copper w/Teflon insulation