Amprobe Telaris-ISO-PRO Insulation-Tester - Manual (Page 14)

Performance of Measurements
Insulation Measurement
The Amprobe ISO-PRO generates the test voltage as pre-set via the measurement function
selection dial (19) at the connection socket RISO (14). A current-voltage measurement is used
to determine the respective insulation resistance.
A built-in automatic device calculates the current measurement value within a few seconds.
Thus, a multitude of measurements may be carried out saving time and battery power. The
measurement time depends on the insulation resistance measured and on the capacity.
WARNING
• Prior to any insulation measurement ensure that the system parts to be tested are not live.
Failure to respect this prescription can cause instrument damage.
• During insulation measurement all loads must be disconnected from the mains.
Furthermore, ensure that all interrupters of the system being tested are switched on.
• During the measurement the UUT/the system being tested may not be touched. Danger of
electrical shock!
• The insulation measurement causes the capacitance UUTs to be charged by test voltage.
The Amprobe ISO-PRO automatically discharges the UUT after the completion of
measurement. When interrupting the measurement or when removing the test leads prior
to the completion of measurement, a dangerous voltage may be present and remain at
UUT. If a dangerous voltage is detected during voltage measurement, the UUT must be
discharged manually, using a high-resistant load (not via short-circuit!).
• The RISO connection socket is supplied from the instrument with a voltage of < 1kV within
the RISO 1000 V measurement range.
1) Set the measurement function selection dial (19) to one of the four ”RISO
measurement functions" (1000 V/ 500 V/ 250 V/ 100 V).
2) Connect the red test lead to the ”RISO" socket and the black test lead to the ”COM"
socket.
• 3 different limit values (0.5/1.0/2.0 M
Ω) can be set using the ”LIMIT" key (16).
• Resistance values between 0.005 M
Ω and 1.999 GΩ can be measured within all four
insulation measurement ranges.
4) Now connect the test leads to UUT.
5) Press the ”Start" key (20). The measurement is started.
12
PAEB30872322:Layout 1 02.10.2008 15:56 Uhr Seite 12