Chauvin Arnoux IMEG 500 Mode D'emploi page 26

INSULA INSULA INSULATION RESIST TION RESIST TION RESIST TION RESISTANCE MEASUREMENT
INSULA INSULA TION RESIST
SWITCH POSITION
EXTENT OF MEASUREMENT
TEST VOLTAGE
A C C U R A C Y
INTENSITY OF
MEASUREMENT CURRENT
MEASUREMENT TIME
FOR CAPACITATIVE LOAD
DISCHARGE TIME
PERMISSIBLE OVERLOAD
TYPE OF PROTECTION
* Approximate value corresponding to the automatic change of scale (when red
l i g h t l i t : m u l t i p l y t h e r e a d i n g b y 1 0 t o g e t t h e r e s u l t )
Disconnect the part of the circuit to be checked from the energy source
Place the switch on the voltmeter position
Connect the instrument according to the diagram (red terminal to the earth to
measure insulation resistance compared to the earth)
Check that the circuit isn't live (no movement of the needle)
Put the switch on an adequate position
Turn the handle until the orangish indicator on the right of the instrument lights
up
Take the reading :
i f t h e r e d i n d i c a t o r s i t u a t e d o n t h e l e f t o f
the instrument is lit multiply the reading
by 10 to get the result
Let the circuit discharge
(a few seconds) before
disconnecting the instrument.
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ANCE MEASUREMENT ANCE MEASUREMENT ANCE MEASUREMENT
ANCE MEASUREMENT
M W
0,5...5,5 *...200 MW
500 V DC constant (± 5 %)
± 2,5 % of the end of scale value
5 mA max
0,5 s/µF
5 s/µF
600 V AC and DC
Over capacity components
Switch on MW
o r kW p o s i t i o n
kW
0 . . . 4 5 * . . . 5 0 0 kW
from a few volts to 650 V max
1 mA constant
Insulation resistance