HT instruments SIRIUS87 - Manual (Page 21)

SIRIUS 87
EN - 19
4.2.2. Special cases which may occur during the tests "MAN", "AUTO", "TIMER"
 In case a value of R
ISO
higher than
R
MAX
was detected (depending on the
selected voltage see following Note
table, the instrument emits a
double
sound signal at the end of the test
indicating the positive outcome of the
test and displays one screen similar to
the screen alongside.
R
ISO

> 999
M 
500 V 20
s
MAN
 In case a test is effected at a voltage
lower than the set rated voltage, at
the end of the test the instrument emits
a
long sound signal and displays one
screen similar to the screen alongside.
R
ISO

0.01
M 
500 V 20
s
MAN
SAVING: The test can be stored pressing the SAVE key twice
(according to § 5.1).
 If the terminal voltage is higher than
30V, the instrument does not effect the
test, displays the screen alongside for 5
seconds after which, it shows the
default screen relative to the R
ISO
test
under selected mode.
R
ISO

 33V
VOL AG
THIS RESULTS CANNOT BE SAVED.
ATTENTION: the
test was not
carried out.
Check that the
circuit is not
energised.
The symbol ">"
means that the
resistance value
R
ISO
is higher than
R
MAX
Test duration
Selected mode
MAN
Selected mode
MAN
ATTENTION: the test of resistance R
ISO
was
effected at a voltage value lower than the set
rated voltage. Low insulation case. This case
occurs under low insulation conditions or in the
presence of capacity on the installation.
Maximum resistance value which can be
measured (999
 is displayed if a rated voltage of
500V was selected see table).
SAVE
SAVE