Dci Ext Shunt (8588A Only) - Fluke 8588A Operator's Manual

DCI Ext Shunt (8588A Only)

The DCI Ext Shunt function measures the dc voltage across the shunt and shows
the calculated current, taking into account specific characteristics of the external
shunt. Push  then  (DCI Ext Shunt) to use the DCI Ext Shunt
function. With DCI Ext Shunt, the Product is used with an external dc current
shunt to measure current. The voltage can be shown as a secondary reading.
DCI Ext Shunt is used to augment the measurement capability of the Product
and to calibrate current shunts themselves.
The default external shunt is the Basic and allows quick setup. This shunt always
appears at the top of the list of shunt data with asset number and manufacturer
both represented by "---". Maximum current and resistance value are the only
editable fields for the default basic shunt. See the screen below, which shows the
shunt information line above the calculated current reading:
DCI Ext Shunt Menu
This section explains the DCI Ext Shunt menu.
 (Range): Allows selection of the Auto, 100 mV, 1 V, or 10 V dc ranges.
Auto will autorange between those ranges depending upon input. The input
impedance is 10 MΩ. The internal firmware of the Product calculates and
corrects for shunt loading based on the 10 MΩ input impedance if Shunt
Corrections is set to ON under Measure Setup.
 (Resolution): The default resolution is 6 Digits. Other choices available
are 4, 5, and 7 Digits.
 (2 nd Reading): The actual dc voltage or additional Power Uncertainty can
be shown as the secondary reading. Secondary reading is not shown if OFF is
selected. Power Uncertainty is the symmetrical uncertainty due to the self-
heating of the shunt based on the current applied and power reference level
setting for the external shunt. See Calculation of the Power Uncertainty.
 (Select Shunt): This menu opens a number of other menus that provide
access to specific current shunts and their characteristics.
Reference Multimeter and 8 ½ Digit Multimeter
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