Ideal 61-796 Manual De Instrucciones página 2

CAUTION
To protect yourself, think "Safety First":
• Voltages exceeding 30VAC or 60VDC pose a shock hazard so use caution.
• Use appropriate personal protective equipment such as safety glasses, face shields,
insulating gloves, insulating boots, and/or insulating mats.
• Never ground yourself when taking electrical measurements.
• Always work with a partner.
• When using the probes, keep fingers as far behind the probe tips as possible.
Operating Instructions
• Before proceeding with
measurement, if the
" " symbol appears on
the display, replace with new
batteries.
• Short the tips of the leads.
Adjust the 0Ω. ADJ control to
set the reading to zero.
• Rotate the function switch to the "EARTH VOLTAGE" position and press to test. Earth volt-
age will be displayed on the LCD. If earth voltage is more than 10V, an inaccurate reading
may be obtained.
• Precision earth resistance measurement method:
(1) Connect the green, yellow and red test leads to instrument terminals E, P and C with
auxiliary earth spikes P1, C1 placed into the soil "IN A STRAIGHT LINE". (Fig. 1)
(2) Rotate the function switch to a suitable range then press the pushbutton to test and
take the reading.
• Simplified earth resistance measurement method
(1) This method is recommended where an earth resistance higher than 10Ω is
measured or where it is not possible to drive auxiliary earth spikes. An approximate
value of earth resistance can be obtained by the two wire system shown in Fig. 2.
(2) Rotate the function switch to "EARTH VOLTAGE" position and press to test. Make
certain that earth voltage is less than 10V.
(3) First rotate the function switch to the "200Ω" position and press to test. Read earth
resistance. If the display shows "1" (MSD), switch to the "2KΩ" position and read
earth resistance.
(4) The reading obtained (Rx) is an
approximate earth resistance
value. There is no need for
external shorting as P and C
terminals are shorted by
using the test leads
specified for the simplified
measurement.
Green
Yellow
C
E P
Green
Red
E P C
2
Red
5-10m 5-10m
Auxiliary
Earth
Spikes
Secondary
re Rx
Earth
Electrode
under test
Where earth for mains power
supply is used.
Figure 1
Earth
Electrode
under test
Figure 2
Rx = Re-re
Primary
Side Side
Supply
Transformer