AT682/683 User’s Manual
22
Manual ranging
To select a range, simply press the Range, < and > key. The instrument changes one
range per key press.
Auto ranging
To enable auto ranging, press the Range key. The AUTO annunciator turns on when Auto
ranging is selected. While auto ranging is selected, the instrument automatically chooses
the suitable range to measure the applied signal.
NOTE:
Auto ranging should not be used when optimum speed is required. The manual
ranging can improve test speed effectively.
Under auto ranging, some devices (such as CBB capacitance) will fail to choose
right range. Such was the situation normal. Using manual ranging will avoid such
situation.
3.4.4 Charge Timer
Accepts entry of a charge time between 0 and 999.9 seconds in 0.1 second.
1．Under discharge state, press Timer key into timer
window. Rotate knob to choose“CHARG”item and enter
setup window.
2．Press Numeric Keys to Enter time value.
3. Enter key can be pressed to finish the input.
4．Press Esc to save time value or Press Enter key to exit
setup window.
NOTE:
If charge time value set to 0s, the charge timer will be disabled.
3.4.5 Sample Timer
Accept entry of a sample time between 0 and 999.9 seconds in 0.1 second. In the
measurement state, AT682/683 will sample a data every sample time.
1．Under discharge state, press Timer key into timer
window. Rotate knob to choose“SAMPLE”item and
enter setup window.
2．Press Numeric Keys to enter time value.
3．Enter key can be pressed to finish the input.
4．Press Esc to save time value or Press Enter key to exit
setup window.
NOTE:
If sample time value set to 0 s, the sample timer will be disabled.
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