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Measurements
TS The Timer measurement is started pressing the
"Start" key. During the time that the test volt-
age is present at UUT the symbol of the mea-
surement unit (M /G ) is blinking.
TS The limit value monitoring is permanently car-
ried out during limit value monitoring, i.e. if the
measurement value falls below the limit value.
This condition is indicated by an acoustic sig-
nal and the display of the respective symbol.
TS The Timer measurement is interrupted when
pressing the "Start" key. A confirmation signal
is audible. The UUT is automatically dis-
charged upon completion of the measure-
ment,. The measurement unit symbol is also
blinking during this procedure.
6.1.2
Acoustic control during Timer
Measurement Timer measurement
If the measurement value changes for the first time
from the overflow (>1.999 G ) to a value < 2.000
G
, abrief signal sound is audible as confirmation
for having connected a UUT. If the insulation resis-
tance falls below the pre-set limit value, an addi-
tional signal (continuous signal) is audible, where-
by the signal level is clearly different from the first
signal sound. Thus, it is possible to test the insula-
tion of several current circuits. The TELARIS ISO
plus is connected to a protective conductor via a
cable. The second cable will be equipped with a test
probe. Test voltage and Timer duration will be set.
The limit value will be selected. Then, the measure-
ment is started pressing the Start key. The user
hears a brief acoustic sound when connecting the
test probe to acurrent circuit. During the measure-
ment of the subsequent current circuit, a further
brief signal sound is audible, etc. If the insulation
resistance of a current circuit is too low, the user
hears acontinuous sound during the time, the test
probe is measuring the faulty current circuit.
ES" If no brief signal sound is audible during the
measurement of a current circuit, either the
timer duration has already elapsed, or the mea-
surement value amounts to
> 1.999 G
, or
the measurement instrument has not yet dis-
played the overflow between two measure-
ments.
13° Thelast measurement
value remains displayed
until a new measurement procedure is started
or a different measurement range is selected.
6.1.3 Limit Value (LIMIT)
Repeated pressing of the "LIMIT" key (16) allows
the setting of 3 limit values for the insulation mea-
surement, or to switch off the limit value monitor-
ing.
The set limit value is displayed. If the measurement
value falls below a pre-set value, a warning signal is
audible and the respective symbol is displayed.
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