Promax PE-335 Manual De Instrucciones página 28

(3) First rotary the function switch to 200Ω position and press to test, read earth
resistance. If the display shows "1" (MSD), switch to 2000Ω position and read
earth resistance.
(4) The reading obtained (Rx) is an approximate earth resistance value. In order
to make this measurement, terminals P (yellow) and C (red) must be short-
circuited before.
(5) Rx = Re - re.
Rx = True Earth Resistance
Re = Indicated Value
re = Earth Resistance or Earth Electrode
(6) Since measuring current is as low as 2 mA, the earth leakage current breaker
(ELCB) does not trip even if the earth side of the commercial power supply
with an ELCB is used.
Follow the proper connection such as fig. 1 the LED (red) indication will lit. This
proves a correct current circulation is under its operation.
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Figure 2.-
USER'S MANUAL. PE-335
07/2015