Programmable AC Source 6430/6420/6415 User‘s Manual
5-2
Problem Reason Solution
Poor Voltage
Accuracy
HIGH or LOW line of output
voltage may be shorted to the case
ground.
Isolate the output line from the case.
Poor
measurement of
V, I, P
Aging of components results in
deviation of characteristics.
Regular calibration or adjustment
is required.
Refer to service manual for internal
reference of voltage adjustment.
Over
Temperature
Protection (OTP)
Ambient temperature is too high. Operate the unit between 0 and 40°C.
Over Load
Protection (OLP)
The output is overloaded. Remove the over load.
Short Circuit
(SHT)
The output is shorted. Remove the short.
Over Power
protection (OPP)
The output power is over the
specification.
Remove the over power or lower
down the output voltage.
AC Source
System cannot
be controlled by
GPIB
1. The address of the AC source is
incorrect.
2. The GPIB cable is loose at the
rear panel of the AC source.
1. Update address.
2. Check connection, and tighten the
screws.
Distorted Output 1. The output voltage from the AC
source is too low.
2. The rectified load is too large at
high frequency.
1. Program higher output voltage.
2. Reduce the load or lower the
output frequency.
Fan Inhibited
Protection
(FAN)
The fan or the holes of ventilation
is blocked.
Remove the obstruction.
Under Voltage
Protection
(UVP)
The line input voltage of the AC
source is too low.
Measure input voltage, and raise it if
it is under the specification.
Open Circuit
Protection
(OPEN)
The output voltage is not
consistent with the set value.
Consult the distributor for assistance.
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