Sealey TA320 - Manual (Page 14)

DC CURRENT MEASUREMENTS
CAUTION: Do not make 20A current measurements for longer
than 30 seconds. Exceeding 30 seconds may cause damage to
the meter and/or the test leads.
1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 4000µA
DC, set the function switch to the yellow µA
position and insert the red test lead banana
plug into the µA/mA jack.
3. For current measurements up to 400mA DC,
set the function switch to the yellow mA
position and insert the red test lead banana
plug into the µA/mA jack.
4. For current measurements up to 20A DC,
set the function switch to the yellow 10A/HZ/%
position and insert the red test lead banana
plug into the 10A jack.
5. Press the MODE button to indicate “DC” on
the display.
6. Remove power from the circuit under test,
then open up the circuit at the point where
you wish to measure current.
7. Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display.