ST2515 Operation Manual
18
and BUS (BUS trigger mode).
TRIG DELAY: Touch this key, the following soft keys will be displayed: AUTO, MANUAL, and
INPUT. (NOTE: The setting time manually input should not be less than the DETECT time, or
the instrument will prompt a message “Input number is over ranging.”)
Auto Trigger Delay (the unit is ms.)
The setting of manual measurement delay time is determined by inputting. Range: 0ms—9.99ms
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NOTE: If the delay time is set as 0ms, the detection for wrong measurement cannot be
executed. Therefore, it is recommended to set the delay time being more than 1ms.
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AVERAGE 1: Touch this key, a numeric keyboard will pop up. Input the average number
ranging from 1 to 255. The larger the average number is set, the better the accuracy will be
obtained but the longer time it will cost to display the result.
200mΩ 1A: At the range of 200mΩ, two current sources are available of which 100mA is
commonly used for remote control or for the case of voltage rising. Note: Once the range
is set as 200mΩ, the open voltage is 5Vmax at the current of 1A while 2.6Vmax at the
current of 100mA.
DETECT: Detection time for wrong measurement. Touch this key, and the following soft keys
will be displayed in the soft key zone: AUTO, MANUAL and INPUT. The detection time should
be less than the trigger delay time.
MEAS Mode: This mode is usually applied in 4-terminal measurement. Touch this key, SLOW
and FAST will be selectable.
1)
SLOW
In circuit, the purpose of using a 10nF(C) capacitance across test terminals is to improve the
stability of testing large resistance and inductive load. However, by doing this, the response time
(T) of measuring large resistance will be greatly reduced and it is 95% of that time measuring
resistance.
Sometimes, even when the 10nF capacitance is applied, it cannot ensure the measurement
stability of all inductive loads. So if the inductance of an inductive load is larger than 10H, please
add a 0.1µF or larger capacitor across fixture terminals or adopt other solutions.
In order to make better response time in testing large resistors, please select FAST (no 10nF
capacitor is used). In this case, the test for inductive loads will be quite unstable.
2)
FAST
If fast measurement is required, please select the FAST mode.
