1–6
CONTROL PANEL KEYPAD
The 3440-L gauge control panel consists of two sections: the 20-key
control keypad (Figure 1–2) and the 〈ON〉 and 〈OFF〉 keys. Keystrokes
result in an immediate “beep” from the gauge. If the beep is not heard, the
operation is not completed. Gauge and control panel operations are
described throughout the manual. Table 1–1 summarizes the functions of
each key, and provides page references for more information on certain
operations.
The 〈SHIFT〉 and shift function keys are color-coded yellow for ease of
identification. The 〈SHIFT〉 must be pressed before pressing a function
key. Functions are directly addressable from any other function except the
calculator mode. Pressing 〈SHIFT〉 causes the display’s top line to change
to –SHIFT FUNCTION–.
NOTE
If a function key is not pressed within four seconds, the gauge
reacts as if no key was pressed. If there is no action after
pressing a key, the gauge will return to READY after two
minutes.
The 〈YES〉, 〈NO/CE〉, and 〈START/ENTER〉 keys apply to all gauge
modes. For a complete reference to any function, consult the index.
Pressing 〈START/ENTER〉 from most modes will abort the mode and
begin a test.
The calculator function keys are 〈MS〉, 〈MR〉, 〈+〉, 〈–〉, 〈×〉, 〈÷〉, and 〈=〉.
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