ST2683A Operation Manual Ver.1.3
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base obtained when operating this open clear; if the user operates the open clear
unsuccessfully or sets the OPEN CLR as OFF, the clear base used in the instrument is the
Factory Default.
2. When operating open clear, the user must conform to the condition described in Chapter
One—“Environment”, pull out all the test lines in test terminals and heat the instrument for
more than 30 minutes, otherwise it may result in inaccurate clear base and then affect the
accuracy of measurement results.
3.2.9 Average
This function is used for setting the test average times of the instrument. The set range is 1~199.
Operation Procedures One for setting the CHAR TIME:
1. Touch this key to select this option and then the color of this option will become the color of
the cursor.
2. Touch this key (cursor) again to enter into the number soft keyboard, input the required
average times and then press the ENTER key to confirm and return to <MEAS SETUP> page.
Operation Procedures Two for setting the CHAR TIME:
Touch the average zone needs to be modified on the screen and the following items will be
displayed in the soft key zone.
↑↑（+ +）
Touch this key and then the instrument will increase the average times (set value) rapidly by
10.
↑（+）
Touch this key and then the instrument will increase the average times (set value) by 1.
↓（-）
Touch this key and then the instrument will decrease the average times (set value) by 1.
↓↓（- -）
Touch this key and then the instrument will decrease the average times (set value) rapidly by
10.
NOTE:
1. When the MEAS TIME is set as 0s (i.e. this procedure is set as OFF), the Average times can be
set as 1~999.
2. When the MEAS TIME is not set as 0s (i.e. this procedure is set as ON), the set value of the
Average times is subject to the MEAS TIME. Specifically, the following restriction rules are
required:
(1) When the MEAS SPEED is set as SLOW, it takes 0.06s to make a measurement, so the
restrictive relation between the Average times and the MEAS TIME is:
Average times × 0.06 <= MEAS TIME
(2) When the MEAS SPEED is set as FAST, it takes 0.03s to make a measurement, so the restrictive
relation between the Average times and the MEAS TIME is:
Average times × 0.03 <= MEAS TIME
3. For the same reason, when setting the MEAS TIME, the above restriction rules are also
required.
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