GW Instek APS-1102 User Manual - Manual (Page 237)

7.3 When Fault Is Suspected
APS-1102 Programmable AC/DC Power Source 7-15
Table 7-11. When Fault Is Suspected (Problem Related to Output Voltage or
Output Voltage Range Setting)
Symptom Possible Cause Required Action, etc.
Output voltage range
cannot be switched.
Fault in internal power source
(internal power source error has
occurred).
Turn power switch off.
If the output voltage range cannot be switched
after turning the power source back on, contact
Good Will or its representative for repairs.
Cannot set output
voltage. External signal input mode has
been set.
Output voltage cannot be set when the signal
source mode is external signal input (EXT).
Set the signal source mode to internal (INT) or
internal + external (ADD) mode.
See “3.4.2 Setting output mode”.
See “5.3.1 Output mode setting”.
Set value differs from
measured value.
Unnecessary items have been
set (for example, AC has been
set even though only DC output
will be used). Check the settings again.
When using ADD mode, check both the external
signal and external input gain.
See “4.10 Adding External Signals
and Internal Signals ”.
Also, check the selected measurement display
items.
See “5.5.6 Selection of measurement
display (MEASURE) ”.
A low impedance load is being
driven. With a low resistance load, inductance load, or
capacitive load, the measured value may be less
than the value set for the limiter operation.
Table 7-12. When Fault Is Suspected (Problem Related to Frequency Setting)
Symptom Possible Cause Required Action, etc.
Output frequency
cannot be set.
External signal input or external
synchronization mode has been
set.
Output frequency cannot be set when the signal
source mode is external signal input (EXT) or
external synchronization (SYNC).
Set the signal source mode to internal (INT) or
internal + external (ADD) mode.
See “3.4.2 Setting output mode”.
See “5.3.1 Output mode setting”.
Line synchronization
cannot be set. External synchronization mode
has been set.
Set the signal source mode to external
synchronization (SYNC), then set the external
sync signal source to LINE.
See “3.4.2 Setting output mode”.
See “4.7.2 Line synchronization”.
See “5.3.1 Output mode setting”.