IET Labs, Inc. RLC Digibridge 1693, User And Service Manual, Page: 160 / 171

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1693 RLC Digibridge
Service and Maintenance
K. Confirm that the GO indicator is lit.
L. Press the START button.
M. Wait for the GO indicator to be lit again.
The RLC display should be .00000 ohms.
N. Press the [MEASURE MODE] key to
select CONT.
4. Connect the banana plugs of the 1687-9600
extender cable to the 1-mH inductance stan-
dard (1482-E) as follows:
• “High” leads (red and red/white) to the
LOW binding post
• “Low” leads (black and black/white) to
the HIGH binding post
• Guard lead (black/green) hanging free.
• White bands should always be closest to
1482 terminals.
5. Disconnect any link between ground and
LOW binding posts.
6. Press the [L/Q] key to select inductance pa-
rameter. Press the [EQUIVALENT CIRCUIT]
key (if necessary) to select SERIES.
7. Refer to Table 5-9 and verify that the RLC
display is between the extremes listed for
1 mH, SLOW measurement rate [first line
of table).
8. Repeat steps 4 through 7 with the other in-
ductance standards (1 mH, 100 mH, 1 H, and
10 H) as indicated in the LS column, and with
the indicated measurement rate, verify that
the RLC display is acceptable for each line
or the table, for ranges 4, 3, 2, and 1.
For more information on connecting to 1482 Series
Inductance standards, see section 3.2.11.
* These ranges of acceptable displays are based on specific accuracy of decade inductors, recently calibrated. If the inductance
values are known to higher accuracy by special calibration or lesser because of long-term drift, the “acceptable RLC extremes”
must be revised accordingly.
** Based on Q of Type 1482 Standard Inductor, as stated in IET Labs documentation. If inductor Q values are known more
accurately, the Q can be checked to tighter tolerances.
Table 5-9: Inductance accuracy checks at 1 kHz