Extech Instruments 480836 Betriebsanweisung PDF herunterladen (Seite 12)

480836-en-EU_V5.3 09/14

Setting the backlight auto off function off

UNIT

1. Press

key to turn off the meter.

2. Press and hold key and turn on the meter again to disable the backlight auto off

function.

Setting the calibration factor (CAL)

MEM

READ

MEM

READ

1. Press the

key turn to off the meter.

2. Press and hold down the

MEM

and

READ

keys, then press the

key to turn on the meter,

the display then shows “CA” (The Calibration factor setting mode).

3. Simultaneously press the

MEM

READ

key to increase or decrease the value.

4. Press the

key to store the new setting value and exit.

Making measurements

Important:

If the sensor is moved quickly, excessive field strength values will be displayed which do not

reflect the actual field conditions. This effect is caused by electrostatic charges.

Recommendation:

Hold the meter steady during the measurement.

Short-term measurements

Application:

Use either the “Instantaneous” or the “Max. Instantaneous” mode if the characteristics and

orientation of the field are unknown when entering an area exposed to electromagnetic

radiation.

Procedure

1. Hold the meter at arm’s length.

2. Make several measurements at various locations around the work place or the interested

areas as described above. This is particularly important if the field conditions are unknown.

3. Pay special attention to measuring the neighboring vicinity for possible radiation sources. Apart

from active sources, those components connected to a source may also act as radiators. For

example, the cables used in diathermy equipment may also radiate electromagnetic energy.

Note that metallic objects within the field may locally concentrate or amplify the field from a

distant source.

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