3-1
IM 2558A-01EN
Preparation
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App
Index
3.1 Handling Precautions
Safety Precautions
If you are using the 2558A for the first time, make sure to read “Safety Precautions,” on pages vi to x.
Do Not Remove the Case
Do not remove the case from the instrument. Some parts of the instrument use high voltages and
are extremely dangerous. For internal inspection and adjustment, contact your nearest YOKOGAWA
dealer.
Unplug If Abnormal Behavior Occurs
If you notice smoke or unusual odors coming from the instrument, immediately turn off the power and
unplug the power cord. Also, turn off the power to the target device that are connected to the output
terminals. Then, contact your nearest YOKOGAWA dealer.
Do Not Damage the Power Cord
Nothing should be placed on top of the power cord. The power cord should also be kept away from
any heat sources. When removing the plug from the power outlet, do not pull on the cord. Pull from the
plug. If the power cord is damaged, purchase a replacement with the same part number as the one
indicated on page iii.
Correct the Problem If Output Is Forcibly Turned Off
If an abnormality is detected in the internal circuit due to a voltage or current overloading, voltage or
current output oscillation, and so on, the 2558A will turn off the output and display a warning message
(No. 031 to 035) on the output display.
In the case of voltage output, remove the cause of the problem, such as the external load, and turn the
output on again.
In the case of current output, remove the cause of the problem, such as the external load, short the
current terminals, and turn the output on again.
If the output still turns off after you have corrected the problem, the 2558A may be malfunctioning.
Contact your nearest YOKOGAWA dealer.
Turn the Power Switch Off If Overheat is Detected
If internal overheating is detected due to a fan malfunction, and so on, the 2558A will turn off the
output, display an error code (No. 901 to 903), and beep intermittently. If this happens, immediately
turn the power switch off. Check that the inlet or outlet holes for the cooling fan are not blocked and
that there is adequate space around the 2558A. Check for and remove any foreign objects that are
caught in the filter on the rear panel. If the same error code appears when you turn the power switch
on after waiting at least an hour, the 2558A may be malfunctioning. Contact your nearest YOKOGAWA
dealer.
Chapter 3
Preparation
