Fluke ScopeMeter 190 II Series - Page 196

Fluke 190-062, -102, -104, -202, -204, -502, -504
Service Manual

Input A, B, C, D AC-Coupled Lower Frequency Test
Note
The test steps for channel C and D are only for the models
190-104, 190-204, and 190-504.
7RWHVWWKHDFFRXSOHGLQSXWORZIUHTXHQF\DFFXUDF\
 &RQQHFWWKH7HVW7RROWRWKH$DVIRUWKHSUHYLRXVWHVWVHH)LJXUH
 6HOHFWWKH7HVW7RROVHWXS
D 5HFDOOWKHVHWXSStandard Test Tool Setup3UHVV
SAVE

F2
5(&$//DQGVHOHFWSETUPSUHVV
ENTER
VHOHFWWKHVHWXSQDPHDQG
SUHVV
ENTER
WRUHFDOOWKHVHWXS
E 3UHVV
SCOPE

F 3UHVV
F2
±5($',1*«DQGVHOHFWZLWK
F1
±5($',1*6
DQG

Reading 1, on A, V ac
Reading 2, on B, V ac
Reading 3, on C, V ac
Reading 4, on D, V ac
G 3UHVV
A
DQGXVH
F2
WRVHOHFWCOUPLING AC.
H 3UHVV
B
DQGXVH
F2
WRVHOHFWCOUPLING AC.
I 3UHVV
C
DQGXVH
F2
WRVHOHFWCOUPLING AC.
J 3UHVV
D
DQGXVH
F2
WRVHOHFWCOUPLING AC.
K 3UHVV
CLEAR
WRFOHDUWKHVRIWNH\PHQXDQGVHHWKHIXOOGLVSOD\
 8VH
TIMEsns
WRFKDQJHWKHWLPHEDVHWRORFNWKHWLPHEDVHRQPVGLY
 8VH
mV
RANGE
DQG
V
RANGE
WRVHWWKH,QSXW$%&DQG'VHQVLWLYLW\UDQJHWR
P9
 6HWWKH$WRVRXUFHWKHDSSURSULDWHDFYROWDJHDQGIUHTXHQF\OLVWHGLQ
7DEOH
 2EVHUYHWKHUHDGLQJ
A, B, C, DQGD DQGFKHFNWKDWWKH\DUHZLWKLQWKHUDQJH
VKRZQXQGHUWKHDSSURSULDWHFROXPQ
 &RQWLQXHWKURXJKWKHWHVWSRLQWV

:KHQ\RXDUHILQLVKHGVHWWKH$WR]HUR9ROWDQG6W
DQGE\
Table 4-5. Input A, B AC Input Coupling Verification Points
5502A output, V rms 5502A Frequency 2 Ch Reading 4 Ch Reading
P9 +] P9WRP9 P9WRP9
P9 +] !P9 !P9