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AC power transformers should be tested to make sure
they provide proper isolation from the AC line.
Transformers should be tested for leakage between the
primary and secondary, as well as for leakage between
the windings and the metal core or frame. To test for
leakage between primary and secondary disconnect all
transformer leads from the circuit. Connect one of the
LC103 test leads to one of the primary leads and the
other LC103 lead to one of the secondary leads. If the
transformer has more than one secondary winding, each
should be tested for leakage. Most transformers used
today have a 1500 volt break down rating and should
have 0 microamps of leakage when tested at 1000 volts
with the LC103. Any leakage indicates a potential shock
and safety hazard.
MEASURING HIGH VOLTAGE RESISTORS TO 1 GIGOHM
Focus and high voltage resistors up to 1 Gigohm may be
measured using the leakage power supply in the LC103.
These resistors are often much too large in value to be
measured with any other test. The ReZolver will read the
resistance of these resistors without any calculations.
The range of resistance which the LC103 will measure
depends on the applied voltage. Table 13 shows the
amount of applied voltage needed to produce a usable
resistance reading. Simply set the leakage power supply
to a voltage just high enough to read the anticipated
resistance, and press the CAPACITOR LEAKAGE test
button. The ReZolver will display the amount of
resistance directly in ohms.
———————— WARNING —————————
This test is only intended to measure high voltage
resistors. Some resistors have voltage ratings of 200
volts or less and will be damaged by high test
voltages. Apply onle enough voltage to the resistor (as
shown in Table 13) to produce a reading.
————————
ATTENTION
————————
Ce test est seulement fait pour mesurer des
resistances de haut voltage. Certaines resistances ne
peuvent accepter que des voltages de 200V ou moins
et seront endommagés par le test de haut voltage.
Utiliser un voltage suffisant (Voir table 13) pour
obtenir une lecture.
Table 13 - To measure resistance values up to 1
Gigohm, enter the necessary leakage voltage
amount to place the resistance value within the
shaded area.
1000V
APPLIED
V
O
LT
A
GE
100V
10V
1V
10
100
OHMS
1k
10k
100k
1M
10M
100M 1000M
