Hold Function; C) Measuring Dc Magnetic Fields (Static) - VOLTCRAFT GM-70 Bedienungsanleitung

b) HOLD function
• In measuring mode, press the HOLD button (5) to freeze the current measured value on the LC display (3). The
'HOLD' symbol is shown on the LC display.
• Pressing the HOLD button (5) again switches back to normal measuring mode. The 'HOLD' symbol goes out.

c) Measuring DC magnetic fields (static)

Magnets are, for example, permanent magnets with a north and south pole. The magnetic field lines run outside the
magnet, always from the north pole to the south pole. This characteristic allows the polarity (north pole/south pole) to
be displayed in addition to the measured value for magnetic flux density. Proceed as follows for static field strength
measurement:
• Switch on the measuring device.
• Press the MODE - DC AC button (7) to switch through the measurement settings and resolutions. Each further
press of the button switches one step further in the loop. Measuring mode for the DC fields is indicated with the
display symbol 'N (S)'.
• Measurement settings a1 (resolution 0.1) and b1 (resolution 0.01) (see the figure below) are used for measurement
of DC magnetic fields in unit mT.
• Measurement settings a2 (resolution 1) and b2 (resolution 0.1) (see the figure below) are used for measurement
of DC magnetic fields in unit G.
One of the two sequences indicated below is switched according to the unit selected. Switch the unit of
measurement to select the other unit of measurement and therefore the other sequence. See Section 'c)
Selecting the unit of measurement'.
• Place the sensor with sensor head (16) on the object to be measured. The sensor head (15) must touch the object.
• The measured value is displayed on the LC display (3) together with the polarity (N/S) of the field. If you move the
sensor head (15), move it as slowly and as smoothly as possible along the test section. This allows you to keep
track of the positions at which the polarity changes.
• After you finish measuring, always switch off the measuring device.
If the measurement range is exceeded upwards or downwards, 'OL' is shown on the LC display (3).
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