IET Labs, Inc. RLC Digibridge 1693, User And Service Manual, Page: 16 / 171

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1693 RLC Digibridge
Abbreviated Specifications
(second parameter in each pair) with automatically
positioned decimal points, units of measurement
and minus signs when appropriate.
The ∆RLC display:
The ∆RLC display indicates the difference between
the measured R, L or C and a nominal value entered
by the user with appropriate units (Ω, µF etc.). The
R, L,or C difference display has five digits with a
simultaneous four digit direct reading display of
D, Q, or R with automatically positioned decimal
points and minus signs when appropriate.
The ∆% display:
The ∆% display indicates the % deviation of the
measured primary quantity and the stored nominal
value. The display is five digits with a maximum
resolution of one part per million with minus sign
when appropriate. The resolution of the DQ and
angle displays may also be increased by using the
DQ in PPM key which gives D or Q in ppm or angle
in microdegrees.
The BIN NO. display:
The BIN NO. display provides a single digit bin
assignment number based on the measured value
and user entered bin limits.
Measurement modes and rates:
There are two test modes, CONTINUOUS and
TRIGGERED. The CONTINUOUS mode makes
successive measurements continually, updating
the display after each measurement. TRIGGERED
measurements are initiated by the START button or
remotely from the IEEE bus and the result held until
another measurement is started.
There are three measurement rates selected by
single keys; SLOW, MEDIUM and FAST whose
measurement times depend on the test frequency
(see table below for C and D, L and Q, or R and Q
speeds). Other measurement rates may be selected
by programming the integration time, AVERAGING
to 255 measurements or adding a programmed
DELAY of 1 to 99999 ms.
The measurement times in the following table
were obtained with the use of the high-speed
measurement option, continuous measurement
mode, bin number display, and without IEEE-Bus
data output. For other conditions refer to the notes
below the table.
If the measurement mode is triggered, programmed
delay (settling time), if any, should be added.
Normal power up conditions include a programmed
delay of 7/f to 12/f ms depending upon
measurement rate. This delay can be programmed to
zero or any value up to 100 s.
Measurement
Rate
12 Hz 100 Hz 120 Hz 1 kHz 10 kHz 100 kHz 200 kHz
SLOW 899 ms 944 ms 944 ms 974 ms 944 ms 944 ms 944 ms
MEDIUM 694 ms 144 ms 194 ms 204 ms 194 ms 194 ms 194 ms
FAST 694 ms 129 ms 114 ms 89 ms 79 ms 79 ms 79 ms
MAXIMUM 672 ms 113 ms* 98 ms* 44 ms 34 ms 34 ms 34 ms
*These times can be shortened by 14ms by using the special quick acquisition routine.
Notes:
1. If the display is value, ∆%or ∆RLC, add 3 to 5 ms.
2. If data is output via the IEEE Bus, add 3 to 6 ms.
3. Speed in the table far e for C with D, L with Q or R with Q measurements.
Table-A: Measurement Rate