30
(1) Setting of Wiring System
Select Wire (2) with reference to 8-2-2 Setting for Measurement
Method in this manual.
(2) Setting of Rk
1. Put the Alligator Clips to the 2 Test Leads (green, red), and connect
the green Plug to the E Terminal and the two red Plugs to the
S(P) and H(C) Terminals respectively.
2. Select the 2Ω or 20Ω Range.
3. Engage 2 Alligator clips to short-circuit both of them.
4. Save the Rk values with reference to
8-2-7 Setting for the residual
resistance (Rk) on the Test Leads
.
Note) A break in Test Leads or burnout of Fuse is suspected when the
LCD shows Rk=OL Ω while 4 Test Leads are being shorted.
(3) Connection
Connect the Test Leads as shown in Fig.40.
Note) When the supplied Simplified Measurement Probes are not used, the
S(P) and H(C) Terminals should be shorted.
(4) Earth Resistance Measurement
Select a high resistance Range when the connection is done, and press
the TEST Button. Then the earth resistance values Re are displayed
on the LCD. Select a lower Range for the low earth resistances.
Earthed
Electrode
under Test
Secondary
Primary
Side
Side
Be sure to check
earthed side of
a commercial
power supply.
Supply Transformer
Where earth for mains supply is used.
Fig.
40
