7.7
Auto Zero Function
Procedure
1.
Press
CONFIG
in the MEASURE section of the front panel to display the CONFIG
menu.
2.
Press the
AutoZero
soft key to display the AutoZero menu.
Turning the Auto Zero Function ON/OFF
3.
Press the
AutoZero
soft key to select On or Off.
Retrieving the Zero Calibration Value
4.
Press the
ZeroCal Exec
soft key to retrieve the zero calibration value.
The
ZeroCal Exec
indicator in the display is highlighted while the zero calibration value is
being retrieved.
Explanation
Auto Zero Function
• On
Enables the auto zero function. The GS820 measures the internal zero point for
each measurement. The measured result is obtained by subtracting this value from
the measured value canceling the A/D offset drift of the measurement circuit in the
GS820. However, the measurement takes approximately twice as long as when the
auto zero function is OFF, because the GS820 measures twice.
• Off
Disables the auto zero function.
Retrieving the Zero Calibration Value
Use this function to execute the zero reference measurement at a desired timing.
When a zero calibration value is retrieved, the zero reference is remeasured on all
measurement ranges by disconnecting the voltage measurement circuit from the Hi and
Lo terminals and shorting the terminals in voltage measurement and disconnecting the
current measurement circuit from the Hi and Lo terminals and opening the terminals
in current measurement. Then, the new zero reference is applied to the subsequent
measurements. The new zero reference remains effective even if the measurement
function or measurement range is changed. When zero reference measurement is
executed, the source and measurement operations are interrupted for few seconds.
<<Corresponding Command Mnemonic>>
[:CHANnel<n>]:SENSe:ZERo:AUTO 1|0|ON|OFF
[:CHANnel<n>]:SENSe:ZERo:EXECute
7-8
IM 765601-01E
