ELTEX EM03, Operating Instructions Manual

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BA-en-1020-1804_EM03
3. Operation
3.1 Startup
Warning!
The instrument must NOT be used in explosion hazard area.
When measuring extremely high static charges, the electric field meter
must be grounded using the alligator clip supplied with the unit. The first
measurement must be made from a sufficient distance to ensure that the
maximum applied surface potentials are determined from a safe measu-
ring distance.
To obtain reliable results on magnitude and polarity of the measured elec-
trical field, the unit itself must be adequately grounded.
Connect the instrument to ground via the grounding cable and the groun-
ding socket (7, Fig. 1) (bondingconductor).
During normal use it is sufficient if the person taking the measurements is
grounded (e.g. conductive footwear or touching grounded machine parts)
and touches the grounding socket (7, Fig. 1).
The unit is switched on by pressing the "function on"-key on the front plat
(5, Fig. 1). Pressing the key twice in brief succession during normal opera-
tion will switch the unit off.
Note!
The unit will switch off automatically after five minutes to avoid battery
exhaustion. Switch the unit back on for subsequent measurements.
3.2 Taking measurements
Remove the protective cap from the modulator system.
The preset measuring distance after switching on is 2 cm.
If this setting is used for measurements, hold the instrument at a distance
of 2 cm from the object to be measured. This measuring distance is ideal
in most cases because it will allow you to measure charges of up to 20 kV
(see Technical Specifications). When measuring at a distance of 2 cm, use
the spacers mounted in the aluminium plate next to the modulator system.
There are instances when the measuring distance ought to be changed.
For instance, if you have very high static charges or a very rough surface
on the measured object, the measuring distance ought to be increased.
On the other hand, if you have very small static charges, and if the surface
of the object measured allows, you should select the smallest measuring
distance of 1 cm.