Lakeshore 425 - 1.6 Model 425 Specifications

6 cHAPTER 1: Introduction
Model 425 Gaussmeter
1.6 Model 425
Specifications
(Does not include probe error, unless otherwise specified)
1.6.1 General
Measurement
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
1.6.2 DC Measurement
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
1.6.3 AC Measurement
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
Probe type
Range
Filter on
4 r-digit resolution
Filter off
3 r-digit resolution
HST Probe
350 kG 000.01 kG 000.1 kG
35 kG 00.001 kG 00.01 kG
3.5 kG 0.0001 kG 0.001 kG
350 G 000.02 G 000.1 G
HSE Probe
35 kG 00.001 kG 00.01 kG
3.5 kG 0.0001 kG 0.001 kG
350 G 000.01 G 000.1 G
35 G 00.001 G 00.01 G
UHS Probe
35 G 00.001 G 00.01 G
3.5 G 0.0001 G 0.001 G
350 mG 000.02 mG 000.1 mG
TABLE 1-4 DC measurement resolution
Probe type
Ranges
3r-digit resolution
HST Probe
350 kG 000.1 kG
35 kG 00.01 kG
3.5 kG 0.001 kG
350 G 000.1 G
HSE Probe
35 kG 00.01 kG
3.5 kG 0.001 kG
350 G 000.1 G
35 G 00.01 G
UHS Probe
35 G 00.01 G
3.5 G 0.001 G
350 mG 000.1 mG
TABLE 1-5 AC measurement resolution