Magmeter Model GM04 

The Magnaflux microprocessor controlled Magmeter offers sophisticated use, measuring functions in simple to use, menu driven, hand-held package. 

The Magnaflux GM04 Microprocessor Controlled Handheld Magmeter represents a significant improvement in functions, features and performance in todays market. The GM04 incorporates an Analogue Peak Detector for the DC and AC peak functions. This, coupled with the Microprocessor operation of the GM04 means that fast response is possible with digital stability (fast pulses / no drop in readings). 

Measurement Functions:

The GM04 can measure:

• DC: DC magnetic field measurement
• DC PEAK: Maximum positive peak reading of the DC field
• AC RMS: True Root Mean Square (RMS)
• AC RMS. MAX: Maximum true RMS
• AC PEAK: Maximum positive peak value

Measurement Units:

The GM04 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 and Oersted (cgs units).

Data Capture:

The GM04 can HOLD measured values by pressing the Hall Probe button. Pressing the button again releases HOLD (when enabled). The GM04 can also STORE measured values. These values can later be RECALLED.

Range Changing:

If the Operator wishes to change ranges, the GM04 has a button dedicated to this function. No use of menu is required.

Utilities:

The GM04 has 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 GM04 also has the facility to operate its menu structure in English, French, German, Italian, Spanish and Portuguese.

Applications:

The GM04 is ideal for inspection and measurement of magnetic flux density of magnets and magnet assemblies in both goods inwards and quality assurance environments.

Applications include: Non-Destructive Testing (Magnetic), 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, Goods Inward and Quality Assurance Inspection, etc.

Specifications:

Auto and Manual Ranging:

Range 1: 0 – to more than 3 Tesla, resolution 1 milliTesla

Range 2: 0 – 299.9 milliTesla, resolution 100 microTesla

Range 3: 0 – 29.9 milliTesla, resolution 10 microTesla

Range 4: 0 – 2.999 milliTesla, resolution 2 microTesla

Measurements can be made in Tesla, Gauss, Amps/m or Oersted

(1 mT = 10 Gauss = 0.796 kA/m)

Accuracy (at 20o C) +/- 1%

(DC) Traceable NPL

Reproducibility +/- 0.5%

Temperature Coefficient: Better than +/- 0.1% of reading /0o C including probe

Frequency Range: DC and 15 Hz to 10 kHz

Averaging Time Constant: 100 milliseconds

Functions: DC, DC Peak, AC RMS, AC RMS MAX, AC Peak

Display: 2 Line, 16-character dot matrix LCD

Display Sampling Rate: 3/sec (approx)

Facilities: Store and Recall on 0 – 99 samples. Hold facility. Analogue Peak with digital storage. Auto and Manual ranges. Automatic reading conversion between different units. Operating set up at time of power-down is stored and recalled automatically at power on. Utilities, etc. Functions are selected with an easy to use menu.

Operating Temp. Range: 0o C to +50o C

Storage Temp. Range: -20o C to +70o C

Battery Type: 9V Longlife Alkaline (Duracell MN1604) or similar Battery Life Approximately 15 hours continuous operation. Auto Power-down after 1, 4 or 10 minutes or can be disabled, all under menu control

Dimensions: Length 196 mm x Width 100 mm x Height 40 mm

Weight: (including battery) 400 g (not including probe)