Simpson 460 4 Series - Page 57

9;
10.
11.
7.6
Sympton
Slow response. Oper-
ation OK when using
a low impedance in-
put.
Accuracy not within
specifications when
checked with a sta-
ble, higher accuracy
(at least 5 times bet-
ter) low impedance
(voltage measure-
ments) source.
Accuracy of Instru-
ment is within speci-
fications, but meas-
urements appears in
error.
Servicing Instructions
Probable Causes
Parameter being meas-
ured has a high source
impedance.
a.
b.
. Instrument
Instrument is out
of calibration.
Instrument not ze-
roed properly.
affects
circuits being meas-
ured.
. Common and/or
normal mode speci-
fications is being
exceeded.
REPLACEMENT PARTS AND
SCHEMATIC DIAGRAM
NOTE: This instrument must be serviced by qualified
personnel. To aid in troubleshooting a schematic dia-
gram is enclosed. The accompanied parts list (Table
6-1) describes the components and refers to Simpson
part numbers.
Cure
cells for checking
purposes only. If
problem still exists,
contact an Auth-
orized Service Cen-
ter.
None required.
Contact Authorized
Service Center.
a. Study circuit being
measured vs. In-
strument specifica-
tions. Correct indi-
cations accordingly.
b. Refer to cure in
item 6 above.
Reference Symbol numbers correlate
the components shown on the schematic diagram with
the parts list.
7.6.1 The following information is provided as an adjunct to
7-7