Boonton 75D Instruction Manual page 53

Table 5. Equipment Performance Checklist (Cont'd)
STEP ITEM
ACTION OR CONDITION
PERFORMANCE STANDARD
3.
(Cont'd)
P-
Adjust CAPACITANCE
control until NULL
INDICATOR pointer
is centered,,
p. NULL INDICATOR
pointer is at midscale
increment.
q°
Read CAPACITANCE dial. q. CAPACITANCE dial
reads < 1 pF.
r.
Set CAPACITANCE
control to zero and meter
switch to ZERO LEFTo
r. None.
So
Set MULTIPLY C switch
to
0.001.
s. None.
t. Zero balance the bridge
as described in para¬
graph 3.5.
t. NULL INDICATOR
pointer dips to within
one subdivision of zero
on LO sector of dial
scale.
u.
Set meter switch to ZERO
CENTER
u. NULL INDICATOR
pointer deflects toward
midscale.
V. Adjust CAPACITANCE
control until NULL
INDICATOR pointer is
centered.
v. NULL INDICATOR
pointer is at midscale
increment.
w. Read CAPACITANCE dial. w. CAPACITANCE dial
reads < 1 pF.
X,
Set CAPACITANCE
control to zero and meter
switch to ZERO LEFT.
x. None.
y«
Set MULTIPLY C switch
to
0.0001.
y. None.
75D
b-370
48