| Precision LC Digibridge
Measurement
Parameters and Modes: Series or parallel L and Q, series or parallel C and D,
series C and ESR, or parallel C and parallel equivalent R. Continuous-repetitive,
single, or averaged (set of 10) measurements; start button initiates single or averaged
measurements. Keyboard selection of these and all measurement conditions.
Main Displays: MEASURE FUNCTION (3 selections): Value display
is LED-type numerical readout with automatically positioned decimal points and
illumination of units; five digits for LC (99999) and simultaneously four digits for D, Q,
ESR (9999). Delta-percent display is percentage difference between LC measurement
and previously stored nominal value. Bin number display shows the bin assignment of
the measured device. (Refer to "sorting" below.) ENTER FUNCTION:
Display shows comparator bin limits, nominal values and test frequency.
Measurement Rates: 0.5, 2, 3, and 8 measurements/second.
Keyboard selections are: extended accuracy, slow, medium, fast.
Test Frequencies: Keyboard selection by entering any desired
frequency: the Digibridge responds by selecting nearest one of 254 frequencies between
234.37 Hz and 20 kHz, inclusive. Selected value is automatically displayed.
Available frequencies are: f = (60/n), where n is an integer that satisfies 3 < n <
256, and f is expressed in kHz.
Ranges of Measurement at 1 kHz
| Parameter |
Minimum |
Basic Ranges |
Maximum |
| L |
.00001 mH |
1.0 mH to 64 H |
9999.9 H |
| C (with D) |
00.001 pF |
400 pF to 25 µF |
9999.9 µF |
| C (with ESR) |
.00001 nF |
0.4 nF to 25 µF |
9999.9 µF |
| D% (of LC) |
0.0001% |
(fully automatic) |
99999% |
| Q (with L) |
.0001 |
(fully automatic) |
999.9 |
| D (with C) |
.0001 |
(fully automatic) |
999.9 |
| D (ext acc) |
0001 ppm |
(fully automatic) |
9999 ppm |
| ESR (with C) |
.0001W |
(fully automatic) |
9999 kW |
Accuracy: BASIC (not including range extensions): For L,
±.04%; C, ±.02%; Q, ±.0002 [1 + (1 + Q)Q]; D, ± 100 ppm (for D < 9999 ppm); ESR,
±.02% ± 1 count.
Applied Voltage: HIGH: 1.0 V rms, open ckt. LOW: 0.25 V
rms, open ckt.
Ranges: Automatic ranging for best accuracy.
DUT Connection: 4-terminal (Kelvin) at built-in test fixture
for radial-lead or axial-lead parts.
Zeroing and Recalibration: "Zero" capacitance of test
fixture, cable, etc. is stored at keyboard command and automatically eliminated from DUT
measured values.
Bias: Internal voltage source -2 V ± 10%, on-off switch.
Sorting: Limit comparator sorts vs a Q D ESR limit and up to 8
pairs of LC limits into 10 bins. GO/NO-GO is indicated. |
