Setting The Backlight Auto Off Function Off; Setting The Calibration Factor (Cal); Making Measurements - Extech Instruments 480836 User Manual

4-5-7 Setting the backlight auto off function off

1. Press key to turn off the meter.
2. Press and hold
auto off function.

4-5-8 Setting the calibration factor (CAL)

MEM
READ
1.
Press the key turn to off the meter.
2. Press and hold down the
the meter, the display then shows "CA" (The Calibration factor setting mode).
3. Simultaneously press the
4. Press the key to store the new setting value and exit.

4-6 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.
4-6-1 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.
UNIT
key and turn on the meter again to disable the backlight
MEM
READ
MEM
READ
and keys, then press the
READ
MEM
or key to increase or decrease the value.
14
key to turn on
480836 V5.0 8/09