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TH2515 Operation Manual
When 1.33
C p , > 1.00 , the working capacity is qualified.
When 1.00
C p , , the working capacity is insufficient.
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6) Hi (num): Be used to add up times that the measurement result exceeds the upper limit value.
7) Lo (num): Be used to add up times that the measurement result is less than the lower limit value.
8) In (num): Be used to add up times that the measurement result passes.
9) Max: Be used to display the maximum measurement result among all measurement results.
10) MaxIndex: Be used to display the test serial corresponding to the maximum measurement result.
11) Min: Be used to display the minimum measurement result among all measurement results.
12) MinIndex: Be used to display the test serial corresponding to the minimum measurement result.
3.4.4
TOOLS
CLEAR: Clear all parameters obtained from last statistic.
TRIGGER: Trigger the instrument to execute a measurement.
SAVE DATA: Touch this key to save the current measurement result (not all statistic results) to an external U disk. If no U disk is found, this function will be disabled. Touch this key again to stop saving.
3.4.5
FILE
1) File Manage: Touch this key to enter into the file manage page.
2) Screen copy: Touch this key to save the current screen page to an external U disk. If no U disk is found, this function will be disabled.
3.5
<MEAS SETUP>
Touch the main menu. And then touch the soft key MEAS SETUP to enter into the MEAS SETUP page shown as figure 3-5.
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TH2515 Operation Manual
Figure 3-5 Measurement Setup
On this page, the following parameter can set:
mR+b (ON/OFF) : Press this touch key to turn on/off the function of this option. This function indicates that the measured resistance value is linearly converted. The measured physical quantity of the resistance value can be converted into other user-defined physical meanings.
The formula is Rs = mR + b, where m, b are parameters, R is the measured resistance value, and Rs is the value after conversion.
FUNC R-T : Touch this key to select the required parameter.
RANGE AUTO : Touch this key, the following soft keys will be displayed: AUTO (automatically set the resistance range), HOLD (lock the resistance range), ↑ (increase the range), ↓
(decrease the range). Touch the corresponding soft key to set the range mode.
TRIG INT : Touch this key, the following soft keys will be displayed in the soft key zone: INT
(auto measurement mode), MAN (manual measurement mode), EXT (external trigger mode),
BUS (BUS trigger mode).
TRIG DELAY : Touch this key, the following soft keys will be displayed: AUTO , MANUAL ,
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
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TH2515 Operation Manual 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, 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 a 10nF capacitance is applied, it also 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.
0 ADJ (ON/OFF): Touch this key to select ON or OFF . ON is to turn on the short correction function while OFF is to turn off.
OVC: Touch this key to select ON or OFF . ON is to turn on the compensation voltage while
OFF is to turn off.
Adjust : Touch this key to select the correction as MANUAL or AUTO. If you select AUTO, the instrument will make corrections in every 30 minutes and it will cost 55ms. If you select
MANUAL, the instrument will make correction according to HANDLER command.
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NOTE: When two different materials contact, a thermoelectromotive force will be generated on the contact surface of them. It will vary with the environment temperature. The higher the environment temperature is, the larger the thermoelectromotive force will be. The principle of
OVC is to apply an inverse current through tested terminals and the formula is where Rp is a positive value, Rn is a negative value.
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