Gigahertz Solutions ME 3951A Bedienungsanleitung Seite 10

Made in Germany
Choice of measurement range
General guideline: as coarse as necessary as fine as possible. Over-
flow will be shown by the vertical bar in the left segment of the dis-
play.
Measurement Instructions –
Electric Fields
Electrical fields can be measured "vs ground potential" or "potential
free"/"with floating potential". Both have their advantages and dis-
advantages. Over many years in the measurement "vs ground po-
tential" was the only one recommended by SBM. For a grounded
measurement of the electric field start by grounding the meter:
Insert the plug of the enclosed grounding cable
into the dedicated socket of the meter
the cable along the side of the case to the back
(see picture). Make sure that neither the grounding
cable nor the user's hand is in the front of the me-
ter (falsifies the reading!).
Unvarnished metal piping for water, gas or heating is especially ad-
equate for grounding with the grounding cable, if need be the in-
cluded grounding clamp will help making the contact. A large nail in
the wet ground of the garden is fine, too. Professionals can also use
the earth contact of a wall socket (Caution: Don't try this as a lay-
man).
Turn on the field meter and set it to "E". Set the filter to "50 Hz",
that is including the mains frequency of 60 Hz up to 400 kHz. Keep
the meter close to your body. The further away from the body it is
held, or if it is even put down, the more the testing results tend to
become distorted into the higher range. During testing please make
sure that the person performing the survey, as well as anybody else
present, is located behind the meter. Proceed as follows:
Move slowly through the room to be measured. Stop frequently
and take measurements pointing to all directions including ceil-
ing and floor.
Move into the direction of the highest reading in order to identify
the field source.
In places where people spend substantial amounts of time, such
as in bed or at a workplace, check all directions as mentioned
above until you have reached the maximum reading at the spot,
where the body of the person would be located.
An EMR survey of sleeping areas should be conducted under "sleep
conditions," with all electrical equipment turned on or off as you
have it at night. Under certain circumstances the electric field
strength might even be higher if these items are switched off!
8
and run
© Gigahertz Solutions GmbH