Specifications

TOS9220/9221 Part Names and Functions 4-1
Chapter 4 Part Names and Functions
This chapter describes the names and functions of components such as switches,
displays, and connectors on the front and rear panels.
4.1 Front Panel
Fig.4-1 Front Panel
(The figure shows model TOS9220.)
[1] DANGER
This red lamp indicates that a high voltage is being output.
Since it is interlocked with the DANGER lamp of the tester proper, it lights up
during tests, as long as an output voltage remains at the output terminals, or dur-
ing automatic testing.
[2] CHANNEL
Indicates the status of each channel during a test. The channel status is repre-
sented as shown below, depending on the color of the LED lit.
Red: The channel has been set to HIGH.
Green: The channel has been set to LOW.
Orange: A contact check is being conducted. Following the check, it also
lights up if the corresponding channel has failed.
The LEDs of channels through which a test is not conducted will be unlit.
[3] POWER
When the scanner is connected to the TOS9200/9201 tester, this indicator lights
up (in green), as it is interlocked with the POWER switch of the tester proper.
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[3]
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