UIM-90 (221)
UIM-90 (221/В)
UIM-90 (221/Р)
UIM-90 (221/ВР)
34
n) summarize the values on the kilovoltmeter C100 when measuring the
voltages on two electrodes in the cell and compare with the LCD display readings
according to step (k). Determine the reduced measurement error of the test
voltage of the Oil tester at a certain numerical mark;
p) in the case of differences between the values of reduced error and speci-
fied, unplug the power supply cable from the power network and adjust the
built-in test voltage meter with the help of variable resistor R17 (see Figure 2);
r) repeat the steps (f) to (p);
s) repeat the steps (f) to (r) for voltages
0.2
0.25
10
,
0.2
0.25
15
,
0.2
0.25
20
,
0.2
0.25
25
,
0.2
0.25
35
and
0.2
0.25
40
kV by controlling them with indications of kilovoltmeter C100.
t) disconnect the power supply cable from the power network, set the
power switch
to "О" position;
u) repeat the steps (j) to (t) at the power network voltage 210 V and 235 V.
7.6.4.2 The result of checking the relative voltage measurement error is
considered positive if the given error does not exceed the value specified in
paragraph 1.2.
DO NOT HOLD THE BUTTON
MORE THAN 20 SECONDS
DURING INCREASING THE TEST VOLTAGE MORE THAN 30 kV!
