East Tester ET3501, Руководство по эксплуатации

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ET35 Series Digital Bridges（LCR）Operating Instructions
Hangzhou Zhongchuang Electron Co., Ltd. 26
3.1.11 Deviation measurement function
The deviation measurement function enables the deviation value instead of the actual
value to appear on the screen. The deviation value equal to the current actual
measurement value less the reference value set in advance. This function is used to
easily observe how the parameters of DUT vary with changes of temperature, frequency,
offset and other conditions. The deviation measurement function can be used for main or
auxiliary parameters, or for both the main parameter and auxiliary parameter at the same
time. The instrument provides two modes of bias measurement as follows:
Delta (absolute) deviation measurement
To identify and measure the difference between the actual measurement value of the
DUT and the set reference value. This value is calculated as follows:
Y X Delta  
X The actual measurement value of DUT
Y The set reference value
Delta% (percentage) deviation measurement
To identify the difference between the actual measurement value of the DUT and the
set reference value divided by the reference value in the form of percentage. The
percentage deviation is calculated in accordance with the following formula:
% 100
) (
%



Y
Y X
Delta
X The actual measurement value of DUT
Y The set reference value
The steps of settting the deviation measurement function:
1. Select the proper measurement function.
2. Press the [Meas Setup] key.
3. Use the arrow key to select "Reference A" and press the [Enter] key.
4. Use the numeric keys to enter the main parameters of the reference value, if the
reference value of the main parameter is entered using numeric keys, the function key will
change to the unit, and the function key can be used to enter the unit of the reference
value. When you press the [Enter] key to enter the reference value, the default unit is (mH,
uF and Ω).
5. Use the arrow key to select "Reference B", and press the [Enter] key.
6. Use the numeric key to enter the reference value of the auxiliary parameter.
7. Use the arrow key to select the "Deviation A" and press the [Enter] key.
8. Use the function keys to select the deviation measurement method.
9. Use the arrow key to select the "Deviation B", and press the [Enter] key.
10. Use the function keys to select the deviation measurement method.
Function keys: DELTA, DELTA%, off.