Amprobe LH41A Panduan Pengguna - Halaman 6

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OPERATING INSTRUCTIONS

Refer to Fig. for the main operating features of the

meter.

Move the switch from the OFF / HOLD position to either

DC or AC to select the required mode of operation.

When in DC mode the display zero may change due to

thermal shifts and other environmental conditions. An

auto zero adjustment is provided. Proceed as follows to

perform the adjustment:

• Ensure that the instrument is away from the current

carrying conductor and that the jaws are closed

during the adjustment cycle.

• Select the DC position of the power switch.

• Use the auto zero button to zero the display if

necessary.

The auto zero button can be used to null the effects of

the earth's magnetic field on DC measurements.

Select as required the DC or AC measurement option

using the power switch.

If necessary adjust the DC display to read zero as

described in section 3.2. Clamp the jaws of the instrument

around the conductor ensuring a good contact between

the closing faces of the jaws.

Observe and take measurements as required. Positive

output indicates that the current flow is in the direction

shown by the arrow on the instrument.

3.4 Data Hold

To activate the data hold, turn the power switch to the

OFF / HOLD position. The data will be held on the display

for approximately 0 seconds.

The meter will power down automatically after

approximately 8 minutes of inactivity.