Triplett 9055 User Manual

Page 34

Notes:
Use the RANGE button to manually select the desired ACV
range. The 400mV AC range can only be selected with the
RANGE button.
Use the REL button to ‘zero’ a reading.
Use the Hz% button to measure the Frequency or Duty
Cycle of the AC voltage.
Use the HOLD button to freeze a reading or turn on the
Backlight.

Measuring AC or DC Current

1. Insert the black test lead into the COM jack.

2. For current measurements up to 4000µA, set the

function switch to the ‘µA’ position and insert the red test
lead banana plug into the ‘µA/mA’ jack.

3. For current measurements up to 400mA, set the function

switch to the ‘mA’ position and insert the red test lead
banana plug into the ‘µA/mA’ jack..

4. For current measurements up to 10A, set the function

switch to the ‘10A’ position and insert the red test lead
into the ‘10A’ jack.

5. Select AC or DC measurement by pressing the MODE

button. The mode setting is shown by annunciators on
the LCD display.

6. Remove power from the circuit under test, then open up

the circuit at the point where you wish to measure
current.

7. Connect the black test probe tip to the negative side of

the circuit.