Table of Contents
Advertisement
h. Set the CAPACITANCE control to the exact value stamped on
the CS-10„
i0
Adjust C510 for a null indication on the meter,,
j.
Remove the CS-10.
f.
Calibrating the CAPACITANCE Control on the 0.001 Multiplier Range (C514).
(1)
Test equipment:
Capacitance Standard CS-1 (Boonton Electronics
Corporation) or equivalent 1 pF capacitance standard*
Two RG-58/U
coaxial cables, each approximately four inches long and terminated
in BNC connectorso
(2)
Procedure:
a.
Check that the fol lowing conditions are observed:
the
Model 75D cabinet is removed, the bridge assembly cover plate
is removed, one RG-58/U cable is connected to the REMOTE
TEST LO connector on the Model 75D and the other RG-58/U
cable is connected to the REMOTE TEST HI connector*
b.
Adjust the Model 75D front panel controls in accordance with
Table 4, except set the MULTIPLY C switch to 0.001 .
c.
Connect the free end of the REMOTE TEST LO cable to either
terminal on the CS-1 .
d.
Zero-balance the bridge as described in paragraph 3*5*
e„
Connect the free end of the REMOTE TEST HI cable to the
remaining terminal on the CS-1.
f.
Adjust the CAPACITANCE and CONDUCTANCE controls for a
null indication on the meter.
Read the CAPACITANCE dial and
compare the reading with the CS-1 value.
g.
Refer to paragraph 1 .4,a, and check the pF reading derived in
Step f
above, for conformity with the capacitance accuracy
specification.
If the accuracy of the pF reading is not consistent
with the specification, perform Steps h through j , below.
h.
Set the CAPACITANCE control to the exact value stamped on
the CS-1 .
i.
Adjust C514 for a null indication on the meter.
j.
Remove the CS-1 .
g.
Calibrating the CAPACITANCE control on the 0.0001 Multiplier Range (C5I5).
(1)
Test equipment:
Capacitance Standard CS-0.1 (Boonton Electronics
Corporation) or equivalent 0.1 pF capacitance standard.
Two RG-58/U
coaxial cables, each approximately four inches long and terminated
in BNC connectors.
(2)
Procedure:
a.
Check that the following conditions are observed:
the
Model 75D cabinet is removed, the bridge assembly cover plate
is removed, one RG-58/U cable is connected to the REMOTE
75 D
b-370
69
Advertisement
Table of Contents
