Model 425 Specifications; General Measurement; Dc Measurement; Ac Measurement - Lakeshore 425 User Manual

6 c 1: Introduction
HAPTER
1.6 Model 425
Specifications
1.6.1 General
Measurement

1.6.2 DC Measurement

1.6.3 AC Measurement

Model 425 Gaussmeter
(Does not include probe error, unless otherwise specified)
Input type: Single Hall effect sensor
Maximum update rate: 30 rdg/s
Probe features: Linearity compensation, probe zero, and hot swap
Measurement features: Autorange, max hold, relative mode, and filter
Probe connector: 15-pin D-sub socket
Probe type
Range 4 r-digit resolution
HST Probe
350 kG
35 kG
3.5 kG
350 G
HSE Probe
35 kG
3.5 kG
350 G
35 G
UHS Probe
35 G
3.5 G
350 mG
TABLE 1-4 DC measurement resolution
Measurement resolution (RMS noise floor): Indicated by value in above table for
shorted input
Display resolution: Indicated by number of digits in above table
DC accuracy: ±0.20% of reading ±0.05% of range
DC temperature coefficient: -0.01% of reading -0.003% of range/°C
DC filter: 16-point moving average
Probe type
3r-digit resolution
Ranges
HST Probe
350 kG
35 kG
3.5 kG
350 G
HSE Probe
35 kG
3.5 kG
350 G
35 G
UHS Probe
35 G
3.5 G
350 mG
TABLE 1-5 AC measurement resolution
Measurement resolution (RMS noise floor): Indicated by value in above table, mea-
sured at mid-scale range
Display resolution: Indicated by number of digits in above table
Filter on
3 r-digit resolution
000.01 kG
00.001 kG
0.0001 kG
000.02 G
00.001 kG
0.0001 kG
000.01 G
00.001 G
00.001 G
0.0001 G
000.02 mG
000.1 kG
00.01 kG
0.001 kG
000.1 G
00.01 kG
0.001 kG
000.1 G
00.01 G
00.01 G
0.001 G
000.1 mG
Filter off
000.1 kG
00.01 kG
0.001 kG
000.1 G
00.01 kG
0.001 kG
000.1 G
00.01 G
00.01 G
0.001 G
000.1 mG