MI 3295 Step Contact Voltage Measuring System
Measurements
31
Note
:
For dry soil or concrete floor, a damp cloth or a film of water should be placed
between the probe and the floor.
It is possible to work with more Meters at the same time.
7.2.4 Potential
Figure 7.14:
Potential screen
Test parameters for Potential measurement
I flt
Maximum expected fault current
(
1 A ... 200 kA)
I set, I gen
Test current
manually set (
10 mA
… 50 A)
or uploaded from Station
Step
Distance between neighbouring measurement points
(
0.5 m … 5 m or 1 ft
… 17 ft)
Dir
Direction of Potential measurement or angle
(0
… 360
, step 5
)
Potential measurement
Select
POTENTIAL
function.
Set test parameters.
Connect the test leads to the instrument and to the test object.
Press the
TEST
key to start the measurement.
Set distance ‘d’ from main point (earthing rod).
Press the
TEST
key to measure Potential at set distance.
Wait until the test result is displayed on the screen.
Set new distance ‘d’ and proceed with next step or repeat step (Press the TEST
key for new straight line Potential measurement).
Store the results by pressing the
MEM
key (optional).
Make sure to save test results before changing test parameters or exiting test
function.
If five or more measurements at different distances were made before changing
test parameters, instrument displays “Save to memory?” message to remind you
to save measurements.
Set new direction and repeat the measurement(s) as described above.
Store the results by pressing the
MEM
key (optional).
Note:
The measurements can be carried out without synchronization. In this case the
measuring current must be controlled and set / changed manually. The results
cannot be corrected after the measurement.
