Front Panel Operation
Instructions for Current Measurements 4
4-27
Set Up a Fluke A40B Shunt
The Product is optimized of the use of A40B shunts.
To set up an A40B shunt:
1. Select Setup Menu >Instrument Setup >Current Shunt Details.
2. Select the range of the A40B shunt.
3. For a new shunt, select Add New to load the shunt Information. For an
existing shunt, select the serial number from the list.
4. From the A40B calibration certificate, add the serial number, calibration date,
DC error, and AC/DC Diff Error.
Notes
The DC Error on the calibration certificate is based on the deviation
from the nominal resistance which the A40Bs gives a 0.8 V output
for the nominal full-scale current.
The Loading Error at various frequencies is based on empirical
studies and is listed in the A40B Instruction Manual. These loading
errors are pre-programed as defaults for each shunt range.
5. Select Done to save the A40B shunt to memory.
Measure with a Fluke A40B Shunt
To make a current measurement with the Fluke A40B:
1. Set up the A40B shunt as instructed in Setting Up a Fluke A40B Shunt.
2. Connect the shunt to the INPUT 1 Type "N" connector or INPUT 2 binding
posts. Refer to Connecting to an A40B.
3. Select INPUT 1 or INPUT 2 from the front panel.
4. On the main menu, choose Select Current Shunt to open the menu to select
the shunt. Shunts are organized by their range and serial number.
5. Select the desired shunt. Once selected, the shunt information is shown on
the display next to the current measurement. At any time, select Shunt
Details to view the A40B shunt information.
6. Set and average a dc reference to use transfer mode if necessary. See
Instructions for Transfer Mode.
Note
For A40B shunts, it is not necessary to use the transfer mode
function. However, the transfer mode provides improved
specifications for ac measurements as listed in the AC/DC Transfer
Mode column in the specification tables.
7. Apply the ac current under test. Results are shown and continuously updated
on the display.
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