Accuracy Verification; General - IET Labs, Inc. RLC Digibridge 1693 User And Service Manual

1693 RLC Digibridge

5.8 Accuracy Verification

5.8.1 General

This procedure is a more rigorous alternative to the
performance verification described above. Precision
standards of impedance are required for this proce-
dure, which checks the accuracy as well as the overall
performance of the instrument. It will be controlled
from the front panel, without disassembly. Table
5-5 lists the recommended standards and associated
equipment. For the C accuracy checks, the standard
is a precision decade capacitor.
Calibration of Standard. The acceptable RLC readout
(min to max range) may have to be modified if the
actual (calibrated) value of your standard or it s ac-
curacy (either or both) is different from the tabulated
value(s).
Test Fixture. This procedure requires that a remote
test fixture (1689-9600) be connected to the 1693.
For example , if your 10-pF standard is known to
be 10.18 ±0.25 pF, then compute the new tolerance
as follows: Digibridge accuracy ±0.02 percent . The
limits are, therefore, 9.92 to 10.44 pF.
130
Verify that the instrument meets performance speci-
fications as follows.
Name Requirements
Decade, 3-terminal, 1pF to 1µF,
Capacitor
Accuracy: ±0.05% ±0.5pF
Decade, 50pF to 1.111115 µF
Capacitor
Accuracy: ±0.5%
Four-terminal, ratio type, 10µF
Capacitor
to 100µF, accuracy: ±0.25%
Capacitor DC , 500 µF, 10 V blocking
Three-terminal, 1uF, accuracy:
±0.02%, uncertainty within
Capacitor
±0.03% including effects of
aging since last calibration
Decade, 3-terminal, 10 ohm to 1
Resistor
Mohm, accuracy: ±0.01%
Fixed, 2-terminal
1 mH, ±0.1%
Inductors 100 mH, ±0.1%
1 H, ±0.1%
10 H, ±0.1%
Table 5-5: Equipment for accuracy verification
Recommended
IET 1413
IET 1412
IET 1417
any
IET 1409-Y
HARS-X-7-1
1482-E
1482-L
1482-P
1482-T
Service and Maintenance