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Operation
Operation Instructions
3
3-13
3.9.6 Timer Setup
The Test Function screen provides for configuring the timer interval, count mode, and decimal places (see
Figure 3-17).
With the timer settings displayed, press the TEST FUNCTION button. The "f" cursor will appear to the
left of the timer interval setting. Use the UP and DOWN arrow buttons to select a value from the user
customizable list. Refer to Section 3-10 for details on programming the timer intervals.
Figure 3-17. The Test Function Screen Showing the Timer Settings
Press the TEST FUNCTION button to advance the "f" cursor to the timer count mode field. Use the UP
and DOWN arrow buttons to toggle the setting between up (UP) and down (DOWN). For the up count
mode, the timer starts at zero (0) seconds and increments up to the timer interval setting. The down
count mode displays time starting from the timer interval setting and decrements to zero (0) seconds.
Press the TEST FUNCTION button to advance the "f" cursor to the timer decimal places setting. Use
the UP and DOWN arrow buttons to toggle the setting between zero (0) and one (1). Zero decimal places
displays time in whole seconds, while one decimal place displays time to a tenths of a second.
Presently, the timer counts only in whole seconds.
3.9.7 Setting Thresholds
The automatic exposure detection start and stop threshold currents can be set from the front panel.
When the thresholds screen is displayed (Figure 3-10), press the TEST FUNCTION button. The “f”
cursor will appear to the left of the start threshold. Use the UP and DOWN arrow buttons to change the
setting. Press the TEST FUNCTION button to move the “f” cursor to the stop threshold setting. Use the
UP and DOWN arrow buttons to change the setting. Press the TEST FUNCTION button a third time to
return to viewing the rest of the test screens. It is recommended that the start threshold be set to 1.3 pA
and the stop threshold be set to 1.2 pA. Depending on the system leakage, other settings may be
necessary. See Section 2.3.1 for more details.
Changing the thresholds automatically zeroes all
measurements.
Setting the thresholds to 0.0 pA disables the
automatic exposure detection. This setting
prevents the measurement of leakage current.
“Leakage NA pA” on the display indicates the
leakage measurement is not available.
NOTE
NOTE
Interval: 60 s
Count: UP
Decimal Places: 0
ADC ALC
NOTE