Ground Resistance Tester Models 3705
- 14 -
Resistance
The
Ω
function provides resistance measurements from 0.1 to 1200
Ω
in
seven autoranges.
Range Resolution
0.07 to 1
Ω
0.01
Ω
1.0 to 50.0
Ω
0.1
Ω
50 to 100
Ω
0.5
Ω
100 to 200
Ω
1
Ω
200 to 400
Ω
5
Ω
400 to 600
Ω
10
Ω
600 to 1200
Ω
50
Ω
Upon initial power-on, the
Ω
function is chosen by default.
The Models 3705 will track down to 0.07
Ω
and
indicate
R .1
below 0.1
Ω
(Fig. 7). Accuracy is
not defined below 0.1
Ω
. Measurements below
0.1
Ω
typically (or even 1
Ω
) indicate the ground
tester is clamped onto a closed loop and that
the signal is not flowing through the ground
under test.
If the resistance readings are above 1200
Ω
, OL
will be displayed on the LCD (Fig. 9). This may
indicate high ground resistance but may also be
caused by a disconnected or poorly bonded
ground.
Figure 7
Figure 8
ON
OFF
Model 3705
GROUND TESTER
®
I N S T R U M E N T S
ON
OFF
R .1
Model 3705
GROUND TESTER
®
I N S T R U M E N T S
