HP 435B Operating And Service Manual page 51

Ad
j
ustments
M
odel 435Β
5-9 .
P
O
WER ME
T
ER
AD
JU
ST
MEN
TS WIT
H
CA
L
I
BR
ATO
R
(Cont'd)
AD
JU
ST
MEN
TS
3.
Set the
R
an ge Calibrator RAN GE
s witc h to 1 mW, FUNC TIO N
s
wi tch to
STANDBY, and POLARITY
s witch to NORMAL .
4. Set the DVM RANGE
s
witch to Vdc.
5. Remove the right side cover of the Power Meter, connect the equipment as shown
in Figure 5-5 and set the LINE switch to ON .
ΝΟΤΕ
Befo r e proceeding with
t
h e a d
j
ust m en t, co nnect the input of α
f
reque ncy counte r (suc h as th e HP 5314Α) to ΤΡ 7 or ΤΡ 8 a nd
ve rify
t h at th e multivi b r ato r
f
r eque ncy is 220 ±12
H
z .
I
f the
freque ncy is incorrect, pe rform
t
he Multivibr ato r A d
j
ustme nt
(5-
7
).
6. Center the Power Meter Balance control, A4R46.
7. Ad
j
ust A4R32 DC Offset control for α DVM reading of 0 ±0.2 mVdc.
8. Set the Power Meter RANGE s witch 5 turns from the fully ccw position.
9. Set the Range Calibrator FUNCTION switch to CALIBRATE.
10 . Ad
j
ust the Power Meter front panel
C AL ADJ control for α DVM reading of 1000
±1 mVdc.
11 . Ad
j
ust the
M
eter control A4R35 for α full-scale meter reading.
12 . Set the Range Calibrator FUNCTION switch to STANDBY.
13 . Set the Power Meter RANGE
s witch fully ccw, press and hold the ZERO switch,
and ad
j
ust A4R42 Auto Zero Offset control for α DVM reading of 0 ±1 mVdc.
14 . Set the P ower Meter RANGE switch 5 turns from the fully ccw position; set the
Range Calibrator's FUNCTION
s
witch to CALIBRATE.
15. Press and hold the Power Meter ZERO switch a nd a d
j
ust the A4R46 Balance
control for α DVM reading of 961 ±3 mVdc.