Examples Of Limit Entry - IET Labs, Inc. RLC Digibridge 1693 User And Service Manual

Upon Demand. To see the current "nominal value",
depress the [NOM VALUE] key (while the ENTER
indicator is lit). To see the limits in any particular
bin (or to verify that it has been closed), depress
[SHIFT][BIN NO] and the desired number, similarly.
Displays selected in this way are limited by the units
that are shown on the panel. For example, if the bin-
3 limits are 162 and 198 nF, but the display units
are pF, when you press [BIN No.][0][3], the display
will go blank. Select either nF or µF (instead of pF)
to obtain a display of these limits. However, any
"nominal values" previous to the current one are
lost and cannot be displayed (unless entered again).
Bin limits are not lost until replaced by new entries
in the particular bin; but they are normally lost when
POWER is switched OFF. To prevent loss, lock the
keyboard; see paragraph 3.9.
For comments on how bin sorting information is
displayed, see paragraph 3.3.3

3.8.5 Examples of Limit Entry

Nested Limits. To enter a set of nested limits, oper-
ate the keyboard as described below for the example
of inductors having Q > 21, Ls = 33 mH +/- 0.35%,
+/- 1%, +/- 5%, +7 -9%.
1. With [FUNCTION] key, select ENTER.
2. With [EQUIVALENT CIRCUIT] key, select
SERIES.
3. With parameter key [Ls/Q], select RLC
units: mH.
4. Enter Q limit thus: [2][1][=][SHIFT]BIN
No.][0][0].
5. Enter nominal RLC value : [3][3][=][SHIFT]
[NOM VALUE].
6. Set bin 1 limits: [1][3][5][%][=][SHIFT]
[BIN No.][0][1].
7. Set bin 2 limits: [l][ %][=][SHIFT](BIN No.]
[0][2].
8. Set bin 3 limits: [5][%][=][SHIFT][BIN No.]
[0][3].
9. Set bin 4 limits: [7][%][-][9][%][=][SHIFT]
[BIN No.][0][4].
10. Close bin 5 (if open): [0][%][=][SHIFT][BIN
No.][0][5].
11. Close bins 6 through 13, similarly, if used
before.
Operation
Sequential Limits. Sequential limits can be entered
by either of the following methods; use the method
that fits your application.
Method 1, changing the nominal value for each bin.
Advantage: Straightforward definition of each bin
in terms of percentages of the bin's nominal value.
Disadvantage: overlaps or gaps in coverage among
several bins are not obvious. (Remember that
overlaps default to the lower-numbered bin; gaps
default to bin 14.)
Example: For sorting capacitors into part of the stan-
dard 5% series, setting D < .005, and nominal values
for the bins at Cs = 0.91, 1.0, 1.1, 1.2, 1.3 µF.
1. With [FUNCTION] key, select ENTER.
2. With [EQUIVALENT CIRCUIT] key, select
SERIES.
3. With parameter key [Cs/D], select units: µF.
4. Enter D limit: [.][0][0][5][=][SHIFT][BIN
No.][0][0].
5. Enter nominal C value: [.][9][1][=][SHIFT]
[NOM VALUE].
6. Set bin 1 limits: [5][%][=][SHIFT][BIN No.]
[0][l].
7. Redefine nominal: [1][=][SHIFT][NOM
VALUE].
8. Set bin 2 limits: [5][%][=][[SHIFT]BIN No.]
[0][2].
9. Redefine nominal: [l][.][l][=][SHIFT][NOM
VALUE].
10. Set bin 3 limits: [5][%][=][SHIFT][BIN No.]
[0][3J.
11. Redefine nominal: [1][.][2][=][SHIFT]
[NOM VALUE].
12. Set bin 4 limits: [5][%][=][SHIFT][BIN No.]
[0][4].
13. Redefine nominal: [1][.][3][=][SHIFT]
[NOM VALUE].
14. Set bin 5 limits: [5][%][=][SHIFT][BIN No.]
[0][5].
15. Close bin 6 (if open): [0][%][=][SHIFT][BIN
No.][0][6].
16. Close bins 7 through 13, similarly (if used
before).
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