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e.
Connect the one megohm resistor between the TEST HI and LO
binding posts. Insert the resistor pigtails fully into the binding
posts and tighten securely.
f.
Adjust the CAPACITANCE and CONDUCTANCE controls for a
null indication on the meter. Read the CONDUCTANCE R-scale
dial.
g.
Refer to paragraph 1 .4,d, and check the CONDUCTANCE R-scale
reading for conformity with the resistance accuracy specification.
If the CONDUCTANCE R-scale reading is not consistent with the
specification, refer to the note at the end of paragraph 4.11,6.
h.
Remove the 1 MQ resistor.
c„
Checking CONDUCTANCE R-Scale Calibration on the 100 Multiplier Range.
(1) Test equipment: One 100 kQ deposited carbon resistor, 1%, 1/4 watt
or 1/2 watt.
(2) Procedure:
a.
Adjust the Model 75D front panel controls in accordance with
Table 4.
b.
Check that the terminal shield is removed from the front panel
binding posts.
c.
Set the MULTIPLY C switch to 0.01 and the DIVIDE G/MULTIPLY
R switch to 100.
d.
Zero balance the bridge as described in paragraph 3.5.
e.
Connect the 100 kQ resistor between the TEST HI and LO binding
posts and tighten securely.
f.
Adjust the CAPACITANCE and CONDUCTANCE controls for a
null indication on the meter. Read the CONDUCTANCE R-scale
dial.
g.
Refer to paragraph 1.4,d, and check the CONDUCTANCE R-scale
reading for conformity with the resistance accuracy specification.
If the CONDUCTANCE R-scale reading is not consistent with the
specification, refer to the note at the end of paragraph 4.11 ,e.
h.
Remove the 100 kQ resistor.
d.
Checking CONDUCTANCE R-Scale Calibration on the 10 Multiplier Range.
(1) Test equipment: One 10 kQ deposited carbon resistor, 1%, 1/4 watt
or 1/2 watt.
(2) Procedure:
a.
Adjust the Model 75D front panel controls in accordance with
Table 4.
b.
Check that the terminal shield is removed from the front panel
binding posts.
c.
Set the MULTIPLY C switch to 0.01 and the DIVIDE G/MULTIPLY
R switch to 10.
75D
b-370
71
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