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3.4
Turning the Power Switch ON and OFF
To Be Checked before Turning the Power ON
Location of the Power Switch and ON/OFF Operation
Power Up Operation
To Make Accurate Measurements
Shutdown Operation
IM 704610-01E
• Is the instrument properly installed?:
• Is the power cord properly connected?: Section 3.3, "Connecting the Power Supply"
The power switch is located at the lower left corner of the front panel. The power switch
is a push button. Press once to turn it "ON" and press again to turn it "OFF."
When the power switch is turned ON, a test program is launched automatically and the
model name and results of each test are displayed on Display 2 (model name -> EQ
board -> MEMORY -> ETHER, and so on). If the test program finishes successfully, the
instrument enters measurement mode. The setup conditions are restored to the ones
that existed immediately before the power switch was turned OFF after the previous
session.
Note
If the TA220 does not operate as described above when the power switch is turned ON, turn
OFF the power switch and check the following points:
•
That the power cord is securely connected.
•
That the supply voltage from the power outlet is correct -> See section 3.3.
•
That the power fuse has not blown -> See section 12.8.
•
That, if necessary, the setup information on the instrument is initialized. Two initialization
methods can be used. -> See section 11.2.
If the instrument still fails to power up when the power switch is turned ON after checking
these points, the instrument is most likely malfunctioning. Contact your nearest YOKOGAWA
dealer for repairs.
To ensure accurate measurements, check the installation conditions indicated in section
3.2, then allow the instrument to warm up for at least thirty minutes after the power
switch is turned ON.
The setup information that exists immediately before the power switch is turned OFF is
stored. This holds true also when the power cord becomes unplugged. Please note that
measured results will not be saved.
Note
The lithium battery that is used to store the setup information has a limited life span. When
the voltage level of the lithium battery drops below a given level, error code 909 appears on
the display when the power switch is turned ON. If the error code appears frequently, the
lithium battery must be replaced quickly. The user cannot replace the battery. Contact your
nearest YOKOGAWA dealer. For the life span of the battery, see section 12.9.
Section 3.2, "Installing the Instrument"
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