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Cryogenic Spares » Electronics » Gauss Meters and Hall Probes
Gauss Meters and Hall Probes
ICEoxford can offer a range of Gaussmeters and Hall probes.
Hand Held Gaussmeters
· Menu Driven
· Graphical LCD display
· DC, AC, PEAK, MAX, HOLD and STORE functions
· Operating functions and units displayed
· USB & RS232 option
· Battery operated
· External power supply connection option
· Multi lingual
· Thin semi-flexible probe
· Visible measurement point
· Probe polarity indicator
TheICEELC01 & ICEELC02 are microprocessor controlled Gaussmeters designed for factory floor, on site and laboratory use. The instrument offers a simple menu driven front end. The Gaussmeters give sophisticated measuring functions in a simple to use, menu driven, and handheld package allowing measurement of magnetic flux Density and Magnetic Field Strength in SI or CGS, these instruments offer excellent value for money.
Introduction
The ICEELCO1 and ICEELC02 are controlled via a simple menu and are supplied with a thin semi-flexible Transverse Hall Probe suitable for all but the very smallest of applications. The ICEELCO1 and ICEELC02 incorporates an analogue peak detector for the DC and AC peak functions. This, coupled with the microprocessor operation means fast response is possible with digital stability (fast pulses / no droop in readings).
Measurements
DC DC magnetic field measurement.
DC PEAK Maximum positive peak reading of the DC field.
AC RMS True RMS (Root mean Square) of input signal.
AC RMS MAX Maximum true RMS.
AC PEAK Maximum positive peak value.
Utilities
The ICEELCO1 and ICEELC02 have a number of UTILITIES options allowing the operator to disable or select various times for the automatic POWER DOWN. Also nulling routines can be selected. The ICEELCO1 and ICEELC02 also has the facility to operate its menu structure in English, French German, Italian, Spanish and Portuguese.
Calibration
The ICEELCO1 and ICEELC02 are calibrated to standards traceable to the National Physical Laboratories. During manufacture, the accuracy of nuclear magnetic resonance (NMR) is used to determine the irregularities and none- conformities of the ICEELCO1 and ICEELC02 and its Hall Probe. This is stored and used mathematically to automatically correct readings taken by the ICEELCO1 and ICEELC02.
Measurement units
The ICEELCO1 and ICEELC02 can measure magnetic flux density or magnetic field strength. The menu system enables the operator to easily choose between Tesla, Amps/m (SI Units), Gauss or Oersted (cgs units).
Data Capture
The ICEELCO1 and ICEELC02 can HOLD measured values by pressing the Hall Probe button. Pressing the button again releases HOLD (when enabled). The ICEELCO1 and ICEELC02 can also STORE measured values. These values can later be RECALLED, either on the meter or via RS232/USB with the ICEELC02.
Applications
The ICEELCO1 is ideal for inspection and measurement of magnetic flux density of magnets and magnetic assemblies in both goods inward and Quality Assurance environments. Where individual measurements need to be recorded the ICEELC02 will store and upload not only the measured values, polarity, measurement units and measurement function, but also the time at which the measurement was taken.
Applications include: Computer Disk Drive Actuators, Loudspeaker Air Gaps, Electric Motor air gaps(including pancake and Permanent Magnets), Transformer Stray Field measurements, Magnetiser and Demagnetiser Field measurements, Bending Magnets, Non-Destructive Testing (Magnetic), Goods inward and Quality Assurance Inspection,automated magnet calibration, Superconducting magnet stray fields, etc.
Communications
The ICEELC02 features all of the functions of the ICEELC01 plus: An interface to provide RS232 and USB communication for uploading measurement data to a host computer. The ICEELC02 can also be remotely controllable via this link.
A full driver suit is available as an optional extra. This includes sample programs with full source code (Microsoft Visual C++ .NET) for the 2000 operating system, XP and later. A Labview ¹ VI is included. Linux is also supported.
The ICEELC02 also incorporates a non volatile memory to enable the retention of stored values even when switched off.
The ICEELC02 also includes a time keeping device to record the time data is stored and an external DC power supply socket for bench top applications.
More information:
sales@iceoxford.com
Available in the following:
| Code | Price | Qty | Basket | |
| ICEelc01 | £500.00 | |||
| ICEelc02 | £650.00 |
Hall Probes
Both the ICEELC01 and the ICEELC02 are supplied with a transverse Hall probe as standard (Tp002). The design of the Hall probe is critical to the satisfactory operation of any gaussmeter. For the ICEELC01 and the ICEELC02 we have used our
experience to produce a transverse Hall probe which is semi-flexible and only 1 mm thick by 4 mm wide. This enables operators to take measurements in tight spaces and narrow air gaps. In addition the sensitive Hall element is clearly visible so the user knows exactly where the measurement is being made. The probe is fitted with a push button enabling the operator to HOLD and STORE measurements and orientate the probe for polarity readings. All transverse and axial probes are fully interchangeable with both the ICEELC01 and the ICEELC02 Gaussmeters
Axial and transverse probes are also available with longer cable lengths. If you require a long cable or a custom probe please contact ICEoxford for further information.
Hall Effect Theory
In an ideal world, a Hall Element consists of a small slab of semiconductor material. Current passes from one end of the slab to the other and the voltage on each edge of the slab is the same when no magnetic field is present. If a magnetic field is now applied through the top to bottom surfaces of the slab, a voltage appears across the sides of the slab which is directly proportional to the Magnetic Flux Density or Magnetic Field Strength. In reality, all practical Hall Probe elements are only linear within certain limits, normally 1%-2%. The more accurate and thinner the probes, the greater the expense. Most Gaussmeter manufacturers approach this problem by selecting current and Hall Probe load resistance to minimise these non-linearity errors.
The Hall Probes are connected to Gaussmeters, the Gaussmeters are designed to be linear to make the best use of the non-linear Hall Probes.
The philosophy behind the design of ICEELC01 and the ICEELC02 is that both the Probe and the Gaussmeter will contain non-linearities and errors. The difference between a theoretical, perfect Hall Probe and that of an individual Hall
Probe is measured and the difference recorded in an E2prom located in the Hall probe socket (this memory device also contains other information such as serial number and calibration date).
The perfect Hall Probe is in fact a calibration process using a technique known as Nuclear Magnetic Resonance (NMR) which gives very high accuracy.
The errors between the ICEELC01 and the ICEELC02 and an ideal electronic circuit are measured and recorded in it's internal E2prom. When a measurement is taken the voltage generated by the Hall Probe element is amplified by the ICEELC01 and the ICEELC02 electronic circuit and digitised in an Analogue to Digital converter.
The software of the ICEELC01 and the ICEELC02 then automatically corrects this data mathematically, firstly with the Hall Probe calibration information and then with the ICEELC01 and the ICEELC02 calibration information. This technique gives superb results and enables calibration of the Gaussmeter to be carried out in software rather than "select on test" resistor values. The ICEELC01 and the ICEELC02 includes other innovative techniques which further improve and give additional long term stability.
The ICEELC01 and the ICEELC02 also includes a linear analogue circuit for peak detection. This dedicated circuit enables the accurate capture of transient events without the inherent delays of Analogue to Digital Converter sampling times.
Although this captured voltage level will decay, in the analogue circuit, it is converted and displayed from a digital storage giving zero droop digital storage.
More information:
sales@iceoxford.com
Available in the following:
| Price | Qty | Basket | ||
| £POA |
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I have worked with IceOxford for a number of years building, developing and repairing cryogenic systems, and I have found their Cryobitz supplies section excellent in both availability and speed of response.
Dr Mark Ellerby, Department of Physics and Astronomy, University College London