A 1199
ρ
-Adapter
ρ
-Adapter operation
10
4.
ρ
-Adapter operation
ρ
-Adapter 1
st
use and later battery replacement
Required tool: screwdriver
-
ρ
-Adapter must be disconnected from any device.
-
Put the
ρ
-Adapter on desktop with backside up (
figure 3.3
).
-
Remove screws (
pos. 4
on
figure 3.3
).
-
Remove battery cover.
-
Insert battery cells correctly in battery holder (
figure 3.4
).
-
Return back the battery cover and screw it.
-
Press a key on the
ρ
-adapter. LED (
pos. 1
on
figure 3.2
) must light.
-
The
ρ
-Adapter is ready for application.
ρ
-Adapter application
-
Prepare test setup for the measurement of specific earth resistance.
-
Connect test leads of the
ρ
-Adapter to the spikes, inserted into the ground plane.
-
Connect the
ρ
-Adapter to the instrument and turn its power on.
-
On the instrument select
EARTH
test function and
ρ
subfunction and enter the
distance
a
between spikes.
-
Start measurement(s) and store result(s) (optional) after finished measurement.
-
If necessary rearrange spikes and repeat the measurements.
-
After finished measurements, turn power off of the
ρ
-Adapter and the instrument.
-
Disconnect test leads, remove inserted spikes, clean them and keep all in
accessory bag.
Figure 4.1: Connection circuit for measurement of specific earth resistance
Specific earth resistance is calculated according to the following formula:
ρ
= 2
π
aR
with:
ρ
Specific earth resistance [
Ω
m (
Ω
ft)].
a
The distance between spikes [m (ft)].
R
Measured earth resistance.
