Sencore ReZolver LC103, Operation And Application Manual

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for aluminum electrolytic capacitors, and Table 2 for
tantalum capacitors. These values are worst-case
conditions as defined by the EIA. Some circuits may
malfunction due to a capacitor’s increasing ESR even if
it falls within these limits. If the capacitor is
questionable, compare it to a known-good capacitor of
the same type, value, and voltage rating.
To measure capacitor ESR:
1.
Connect the out-of-circuit test leads.
2.
Zero the test leads.
3.
Connect the capacitor to the test leads. If the
capacitor is polarized, be sure to connect the black
test clip to the “-” terminal of the capacitor and the
red test clip to the “+” capacitor terminal.
4.
Press the CAPACITOR ESR button and read the
amount of ESR in ohms on the COPONENT TEST
RESULTS display.
5.
Compare the measured ESR to the value listed in the
following ESR tables for the capacitor type, value,
and voltage rating of the capacitor you are testing.
NOTE: By entering the component type, working
voltage, and value parameters for the capacitor, the
LC103 will automatically display the measured ESR
along with the same GOOD/BAD indication as the ESR
tables.
Measuring Capacitor Dielectric Absorption
Dielectric Absorption is often called “battery action” or
“capacitor memory” and is the inability of the capacitor
to completely discharge. While all capacitors have some
minute amounts of dielectric absorption, electrolytics
may often develop excessive amounts which affect the
operation of the circuit they are used in.
To check a capacitor for dielectric absorption, press the
DIELECTRIC ABSORPTION button and compare the
value to the chart. A fully automatic GOOD/BAD test
may also be used to test for dielectric absorption when
COMPONENT TYPE and COMPONENT
PARAMETERS are entered.
To measure capacitor dielectric absorption:
1.
Connect the out-of-circuit test leads.
2.
Connect the capacitor to the test leads. If the
capacitor is polarized, connect the red test clip to the
“+” capacitor terminal and the black test clip to the
“-” terminal.
3.
Press and hold the DIELECTRIC ABSORPTION
button. An arrow (—>) will appear and slowly move
through the display indicating that the test is in
progress.
4.
Read the percentage of dielectric absorption on the
COMPONENT TEST RESULTS display.
Standard Aluminum Electrolytic Capacitors
Capacity
in uF
1.5V 3.0V 6.0V 10V 15V 20V 25V 35V 50V 100V 200V 300V 400V 500V 600V 1000V
<1.0 1411 1411 1411 1411 988 988 988 705 705 564 564 564 564 564 564 564
1.0 663 663 663 663 464 464 464 464 332 332 265 265 265 265 265 265
1.5 442 442 442 442 310 310 310 221 221 177 177 177 177 177 177 177
2.2 302 302 302 302 211 211 211 151 151 121 121 121 121 121 121 121
3.3 201 201 201 201 141 141 141 101 101 80 80 80 80 80 80 80
4.7 141 141 141 141 99 99 99 71 71 56 56 56 56 56 56 56
6.8 98 98 98 98 68 68 68 49 49 39 39 39 39 39 39 39
10 66 66 66 66 46 46 46 33 33 27 27 27 27 27 27 27
15 44 44 44 44 31 31 31 22 22 18 18 18 18 18 18 18
22 30 30 30 30 21 21 21 15 15 12 12 12 12 12 12 12
33 20 20 20 20 14 14 14 10 10 8.04 8.04 8.04 8.04 8.04 8.04 8.04
47 14 14 14 14 9.88 9.88 9.88 7.06 7.06 5.65 5.65 5.65 5.65 5.65 5.65 5.65
68 9.76 9.76 9.76 9.76 6.83 6.83 6.83 4.88 4.88 3.90 3.90 3.90 3.90 3.90 3.90 3.90
100 6.63 6.63 6.63 6.63 4.64 4.64 4.64 3.32 3.32 2.65 2.65 2.65 2.65 2.65 2.65 2.65
150 4.42 4.42 4.42 4.42 3.10 3.10 3.10 2.21 2.21 1.77 1.77 1.77 1.77 1.77 1.77 1.77
220 3.02 3.02 3.02 3.02 2.11 2.11 2.11 1.51 1.51 1.21 1.21 1.21 1.21 1.21 1.21 1.21
330 2.01 2.01 2.01 2.01 1.41 1.41 1.41 1.01 1.01 .804 .804 .804 .804 .804 .804 .804
470 1.41 1.41 1.41 1.41 .988 .988 .988 .706 .706 .565 .565 .565 .565 .565 .565 .565
680 .976 .976 .976 .976 .683 .683 .683 .488 .488 .390 .390 .390 .390 .390 .390 .390
1000 .663 .663 .663 .663 .464 .464 .464 .332 .332 .265 .265 .265 .265 .265 .265 .265
1500 .442 .442 .442 .442 .310 .310 .310 .221 .221 .177 .177 .177 .177 .177 .177 .177
2200 .302 .302 .302 .302 .211 .211 .211 .151 .151 .121 .121 .121 .121 .121 .121 .121
3300 .201 .201 .201 .201 .141 .141 .141 .101 .101 .080 .080 .080 .080 .080 .080 .080
4700 .141 .141 .141 .141 .099 .099 .099 .071 .017 .056 .056 .056 .056 .056 .056 .056
6800 .098 .098 .098 .098 .068 .068 .068 .049 .049 .039 .039 .039 .039 .039 .039 .039
10000 .066 .066 .066 .066 .046 .046 .046 .033 .033 .027 .027 .027 .027 .027 .027 .027
15000 .044 .044 .044 .044 .031 .031 .031 .022 .022 .018 .018 .018 .018 .018 .018 .018
22000 .030 .030 .030 .030 .021 .021 .021 .015 .015 .012 .012 .012 .012 .012 .012 .012
33000 .020 .020 .020 .020 .014 .014 .014 .010 .010
47000 .014 .014 .014 .014 .010 .010 .010
56000 .012 .012 .012 .012
68000 .010 .010 .010 .010
Table 1 - Maximum allowable ESR for aluminum electrolytics per EIA standards.