Simpson 460 4 Series - Troubleshooting Chart

7.5
7.5.1
Servicing Instructions
TROUBLESHOOTING
If the Intsrument does not yield satisfactory results, follow
this procedure, before attempting maintenance on the Instrument:
a.
b.
Review and comply with the Preliminary Notes and Checks,
listed in paragraph 4.3.
Check that all switches are positioned correctly for the parame-
ter and range of value being measured and that the measure-
ment situation is within the ratings of the Instrument.
If the 460-4D has been operated with battery power, be sure
that the cells are charged and properly installed (paragraph
6.3).
. If the 460-4A has been operated with AC power ensure that
the power source is within the Instrument specifications, and
free from excessive fluctuations and transients.
Ensure that the environment in which the Instrument is being
used is within the Instrument specifications.
Inspect the device being measured and the measurement test
set-up to ensure that proper shielding and grounding techniques
have been used. Also consider whether the Instrument is sig-
nificantly affecting the circuit being measured.
7.5.2 If the steps taken in paragraph 7.5.1 do not yield satis-
factory results, refer to the troubleshooting chart (Table 7-1).
Direct all other repair and adjustment needs to an Authorized
Service Center.
ПА
Table 7-1. Troubleshooting Chart
Sympton
No indication on nu-
merical display when
460-4D is battery
operated. AC opera-
tion is OK.
Probable Causes
Cells — Discharged,
defective, not installed
properly, making poor
contact, or missing.
Cure
Check battery voltage.
Refer to para. 4.3.2.
If OK contact nearest
Authorized Service
Center.