Zero-Adjust Function - ITech IT5101 User Manual


Insert USB with files to be recalled inside. The instrument will search for the
data file inside and display file list, as shown above. Press Down key to select
required file name and press [Recall] key to recall data records in the USB.

3.15 Zero-Adjust Function

Execute zero adjustment befor measuring to nullify any residual offset voltage
from the instrument or measurement environment. Measurement accuracy
specifications are applicable after zero adjustment.
Zero adjustment is a function which adjusts the zero point by deducting the
residual value obtained during 0Ω measurement. For this reason, zero
adjustment must be performed when connection is made to 0Ω. However,
connecting a sample with no resistance is difficult and therefore is not practical.
In this respect, when performing the actual zero adjustment, create a pseudo
connection to 0Ω and the adjust the zero point.
Wiring principle for Zero-Adjustment
The voltage between Sense(Red) and Sense(Black) becomes 0V according to
the Ohm's Law of E=I*R. In other words, if you set the voltage between
Sense(Red) and Sense(Black) to 0V, this gives you the same state of 0Ω
connection.
Before executing zero adjustment, connect the test leads (probes) as follows:
1.
2.
3.
Sine the amount of zero adjustment varies with the position and state of the
Recall Data
Connect Sense (Red) to Sense (Black).
Connect Source (Red) to Source (Black).
Connect Snese(Black) and Source(Black).
Note
The detailed information for test leads probes, please refer to the test lines introduction.
Copyright© Itech
Electronics Co., Ltd.
Function and Features
30