HT Italia GSC53N, Instruction Manual

Page: 24 / 152

GSC53N - GSC57 - ZG47
EN - 22
Standard Brief description Test voltage Maximum limit value
EN60439 Electrical panel boards 230/400V 500VDC > 230k
EN60204 Electrical equipment of machines 500VDC
> 1M
Table1: Table reporting the test voltage and the corresponding limit values for few
Guidelines.
Rated voltage selected
for the test
R
MAX
= Maximum resistance
value
50VDC
99.9M
100VDC
199.9M
250VDC
499M
500VDC
999M
1000VDC
1999M
Table2: Table of maximum resistance values which can be measured under M
mode depending on the rated voltage selected.
6. Using F3 , F4 is possible to set minimum limit for Insulation measurement selected
one of following values: 0.05M , 0.1M , 0.23M , 0.25M , 0.50M , 1.00M ,
100M according to Table1.
WARNING
The value of set limit in “ MAN ” mode is used in “ TIMER ” mode also, although
the “LIM” message doesn’t appear at display.
7. If the
"TMR" mode was selected use the F3 , F4 keys to set the duration time of
the test:
WARNING
Never disconnect the test leads from the circuit under test when the
message
"MEASURING" is displayed as the circuit under test may remain
charged at a dangerous voltage. The instrument has an internal "safety
resistor" which is connect to output terminal before end of test in order to
discharge the parasite capacities of the installation.
8. Press the START key.
The instrument will start the test.
 MAN Mode: The test will take 4 seconds (maximum). If you keep
the START key pressed longer than 4 seconds the test go on
until the key is released.
 TMR mode: The test will take the time set. If you want to stop
the test when it's running, press the START key again.
START
STOP