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Model 460 Gaussmeter
Model 460 3-Channel Gaussmeter
Best suited for fringe field measurements or measurement of magnets
and solenoids driven at line frequency, RMS mode measures periodic
AC fields from 10 Hz to 400 Hz. Instrument circuitry accommodates
wave forms with crest factors up to 7, with true RMS conversion.
 Can be operated with 3 individual probes,
a single 2-axis probe and 1 individual probe,
or a single 3-axis probe
Peak circuitry in the Model 460 captures single event peaks or
monitors the peak amplitude of periodic wave forms from 10 Hz to
400 Hz, with reproducible single peak measurements down to 5 ms
rise time. Instrument software accommodates indefinite hold time
with no decay. The Model 475 DSP gaussmeter is a good choice if
faster peak or RMS measurements are required.
 Displays each axis simultaneously
 Vector magnitude reading
 Resolution to 5¾ digits (1 part out of ±300,000)
 Accuracy to ±0.10% of reading
 Peak capture
 Analog voltage outputs
 IEEE-488 and serial interface
Product Description
The Model 460 3-channel Hall effect gaussmeter is the best
choice for applications requiring 3-axis measurements or
3 simultaneous single axis measurements. The Model 460
combines the performance of 3 Model 450 gaussmeters into
one package, making it an excellent value for materials analysis
and field mapping applications. The large vacuum fluorescent
display shows readings for all 3 channels simultaneously as well
as vector magnitude or differential readings. The full-function
keypad provides easy access to measurement features.
Measurement Modes
The Model 460 operates in DC, RMS, and Peak modes, with
superior accuracy and resolution in DC measurement mode.
Measurements to 5¾ digits are possible due to the low noise
floor. With low noise and high stability, the Model 460 is
ideal for multiple axis field mapping applications. Changing
fields that are often used in material analysis systems can be
measured on all 3 inputs up to 18 times per second over the
computer interface, with excellent resolution.
www.lakeshore.com
Lake Shore Cryotronics, Inc.
Range and Resolution
When used with appropriate probes, the Model 460 3-channel
gaussmeter offers full scale ranges from 300 mG to 300 kG. A different
range can be used with each input. With 5¾ digit resolution, DC
field variations approaching 0.010 mG can be detected; in larger DC
fields, resolution to one part in 300,000 is possible. For RMS and peak
measurement, resolution is 4¾ digits or one part in 30,000 because
environmental noise is more difficult to separate from the desired
signal in those modes. The filter feature of the Model 460 improves
resolution in noisy environments by taking a running average of field
readings. DC mode requires filtering to achieve 5¾ digit resolution.
Interface
The Model 460 is equipped with both parallel (IEEE-488) and serial
(RS-232C) computer interfaces for command and data exchange;
maximum reading rate can be achieved with the IEEE-488 interface.
Nearly every function on the Model 460 front panel can be performed
via computer interface. The Model 460 also includes one corrected and
three monitor analog voltage outputs. Corrected for sensor linearity,
offset, and temperature effects, the corrected output is a DC voltage
proportional to the display reading. It is generated by a digitalto-analog converter programmed at the update rate of the Model
460, with software error correction. Corrected output is compatible
with the Model 460 vector calculation software. The three monitor
outputs are real time analog voltages proportional to each input’s
field; uncorrected, they provide output across the full DC to 400 Hz
bandwidth at real-time speed.
(614) 891-2244
fax: (614) 818-1600
e-mail: info@lakeshore.com
Model 460 Gaussmeter
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Model 460 Rear Panel
 Line input assembly
 IEEE-488 interface
 Serial I/O interface
 Corrected analog output
 Monitor analog outputs
 Probe inputs




Display
The Model 460 has a four line by 20 character vacuum fluorescent
display. During normal operation, the display is used to report
field readings and give results of other features such as max/min
or relative. When setting instrument parameters, the display
gives the operator meaningful prompts and feedback to simplify
operation. The operator can also control display brightness.
Following are four examples of the various display configurations:


Probes and Sensors
Lake Shore offers an extensive line of single, two-, and three-axis
probes, standard Hall sensors, and probe accessories. Lake Shore
probes are factory calibrated for accuracy and interchangeability.
Factory-calibrated probes feature a programmable read-only
memory (PROM) in the probe connector so that calibration
data can be read automatically by the instrument. If the probe
is equipped with a temperature sensor, the Model 460 reads
both temperature and field signal and continuously adjusts the
calculated field value. The customer can also download sensitivity
for discrete Hall sensors. In addition, Lake Shore can custom
design probes and assemblies to meet specific application needs.
Normal Reading – the display configured to show the live
DC field readings for the X, Y, and Z axis, as well as the
vector magnitude
Model 460 Rear Panel Configurations
Max DC Hold On – the display configured to show the live
DC field readings for the X, Y, and Z axis, as well as the
maximum field reading (settable to any axis)
Model 460 configured as 3 separate gaussmeters
Differential Reading On – the display configured to show the
live DC field readings for the X and Y axis, as well as the X-Y
axis differential reading
Model 460 configured as a 2-axis and single axis gaussmeter
3 Separate Probe Readings On – the display configured to show
the X, Y, and Z axis as three separate gaussmeters: the X axis as
a DC field reading with audible and visual alarm, the Y axis as an
RMS field value, and the Z axis as a peak field value
Model 460 configured as a 3-axis gaussmeter
www.lakeshore.com
Lake Shore Cryotronics, Inc.
(614) 891-2244
fax: (614) 818-1600
e-mail: info@lakeshore.com
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Model 460 Gaussmeter
Model 460 Specifications
Interfaces
General Measurement
Number of inputs: 3
Update rate: Up to 4 rdg/s on display; up to 18 rdg/s with IEEE-488 interface
Measurement modes: DC, RMS, peak
Probe compatibility: Standard, multi-axis, and custom probes
Probe features: Linearity Correction, Temperature Correction, Auto Probe Zero
Measurement features: Autorange, Max Hold, Relative Mode, Filter, Vector Magnitude,
Differential Reading
Probe connector: 15-pin D style
DC Measurement
Probe type
Range
HST Probe
300 kG
30 kG
3 kG
300 G
HSE Probe
30 kG
3 kG
300 G
30 G
UHS Probe
30 G
3G
300 mG
5¾ digits with filter
4¾ digits without filter
0.001 kG
0.0001 kG
0.00001 kG
0.001 G
0.01 kG
0.001 kG
0.0001 kG
0.01 G
0.0001 kG
0.00001 kG
0.001 G
0.0001 G
0.001 kG
0.0001 kG
0.01 G
0.001 G
0.0001 G
0.00001 G
0.001 mG
0.001 G
0.0001 G
0.01 mG
General
Ambient temperature: 15 to 35 °C at rated accuracy. 5 to 40 °C with reduced accuracy
Power requirement: 100, 120, 220, 240 VAC (+5%, -10%), 50 or 60 Hz, 40 VA
Size: 432 mm W × 89 mm H × 368 mm D (17 in × 3.5 in × 14.5 in), full rack
Weight: 7.5 kg (16.5 lb)
Approval: CE mark
DC accuracy: ±0.10% of reading ±0.005% of range
DC temperature coefficient: ±0.05% of reading ±0.003% of range per °C
AC RMS & Peak Measurement
AC display resolution: 4¾ digits
Probe Type
Range
HST Probe
300 kG
30 kG
3 kG
300 G
HSE Probe
30 kG
3 kG
300 G
30 G
UHS Probe
30 G
3G
300 mG
RMS Resolution
Peak Resolution
0.01 kG
0.001 kG
0.0001 kG
0.01 G
0.01 kG
0.001 kG
0.0001 kG
×
0.001 kG
0.0001 kG
0.01 G
0.001 G
0.001 kG
0.0001 kG
0.01 G
×
0.001 G
0.0001 G
0.01 mG
0.001 G
0.0001 G
×
Ordering Information
Part number
460
460-10
Accessories included
115-006
Detachable line cord (U.S.)
115-007
Detachable line cord (European)
4060
Zero gauss chamber
MAN-460
Model 460 user manual
Display type: 4-line by 20-character, vacuum fluorescent
Display resolution: Up to ±5¾ digits
Display update rate: 4 rdg/s with Vector off, 3 rdg/s with Vector on
Displays units: Gauss (G), Tesla (T)
Units multipliers: µ, m, k
Annunciators: RMS: AC input signal, DC: DC input signal, MAX: Max Hold value, s: relative
reading, R: Remote operation, : Alarm on
Keypad: 25 full travel keys
Front panel features: Intuitive operation, display prompts, front panel lockout, brightness
control
www.lakeshore.com
Lake Shore Cryotronics, Inc.
Description
Model 460 gaussmeter
Model 460 gaussmeter with corrected analog output set to
±10 V instead of ±3 V
Specify line power option
VAC-100
100 VAC, includes U.S. power cord
VAC-120
120 VAC, includes U.S. power cord
VAC-220
220 VAC, includes universal Europe power cord
VAC-240
240 VAC, includes universal Europe power cord
VAC-120-ALL
120 VAC, includes U.S. & universal Europe power cords & all fuses
AC frequency range: 10 Hz to 400 Hz
AC RMS accuracy: ±2% of reading (50 Hz to 60 Hz)
AC RMS frequency response: 0 to -3.5% of reading (10 Hz to 400 Hz)
(All AC RMS specifications for sinusoidal input >1% of range)
AC peak accuracy: ±5% typical
AC peak speed: 5 ms for single peak
Front Panel
RS-232C capabilities
Baud: 300, 1200, 9600
Connector: RJ-11 configuration
Update rate: Up to 14 rdg/s at 9600 baud
IEEE-488 capabilities
Complies with IEEE-488.2 SH1, AH1, SR1, RL1, PP0, DC1, DT0, C0, E1
Update rate: 18 rdg/s with Vector off, 14 rdg/s with Vector on
Alarm
Settings: High and low setpoint, Inside/Outside, Audible
Actuators: Display annunciator, beeper
Monitor analog output (3)
Configuration: Real time analog voltage output
Scale: ±3 V = ±FS on selected range
Frequency response: DC to 400 Hz
Accuracy: Probe dependent
Minimum load resistance: 1 kΩ (short circuit protected)
Connector: BNC
Corrected analog output (1)
Configuration: Voltage output generated by DAC
Range: ±3 V; ±10 V for the Model 460-10
Scale: User-defined
Resolution: 0.366 mV of ±3 V
Update rate: Same as field measurement
Accuracy: ±0.1% full scale in addition to measurement error
Minimum load resistance: 1 kΩ (short circuit protected)
Connector: BNC
Accessories available – also see Gaussmeter Accessories section
4001
RJ-11 4-wire cable assembly used with RS-232C interface –
cable is 4.3 m (14 ft) long
4002
RJ-11 to DB-25 adapter – connects computer to RS-232C port
4003
RJ-11 to DE-9 adapter – connects computer to RS-232C port
4004
IEEE-488 interface cable connects customer-supplied computer
to IEEE-488 interface – cable is 1 m (3.3 ft) long
CAL-460-CERT
CAL-460-DATA
CAL-N6-DATA
RM-1
Instrument recalibration with certificate
Instrument recalibration with certificate and data
Calibration data for a new Model 460
Rack mounting shelf to attach one Model 460 gaussmeter
to a 483 mm (19 in) rack mount space
Probes ordered separately; custom probes available – consult Lake Shore
(614) 891-2244
fax: (614) 818-1600
e-mail: info@lakeshore.com
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