Reference Multimeter and 8 ½ Digit Multimeter
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• Maximum current: Use the numeric keypad and to input the
maximum current that can be applied to the shunt without causing a
resistance value change. Maximum current is displayed as the third field
in the shunt information line.
• Power ref. level: Enter the current level used when calibrating the shunt
resistance value.
• Power coefficient: Enter the power coefficient of the shunt, in μA/A.
The Power ref level and Power coefficient entries are used to calculate the
additional uncertainty of the displayed current due to self-heating of the
shunt. The Power uncertainty is shown as an integer value between 0 μA/A
and 999,999 μA/A, and does not affect the calculated current. See the screen
below.
Calculation of the Power Uncertainty
Power uncertainty = Power coefficient x { 1 - (Measured current/Power ref
level)
2
}
See the screen below:
iei014.png
Push (Save as new) to save as a new DCI Ext Shunt, or push to
save as changes to the existing shunt.
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