User Manual

ACL 450B Operation Manual Rev. Jan 10, 2022 MKB

Page 3 of 6

OPERATION

1. Power ON:

Slide the power switch to the ON position and verify activity on the display. The kV/Inch light will

illuminate red when the meter is on, and the pushbutton is in the HOLD position.

With power ON, check the display. Battery low is indicated by all four decimal points illuminated.

If low battery is indicated, replace the battery before use.

2. Ground Meter

Grounding (discharging) your body also discharges the instrument through its dissipative case. If you

are not wearing a grounded wrist strap, discharge your body by touching a grounded metal object

such as a water pipe, conduit, or workbench. The meter can also be grounded by attaching a ground

cable to the snap on the back of the case and connecting the other end of the cable to a known

ground.

3. Zero adjust the instrument

Once grounded, with unit ON, point the sensor plate away from any charged object and press the

pushbutton so that it clicks into the lower MEASUREMENT position. Do not touch sensor, but

point it toward a known grounded surface at 1 inch until the concentric ring forms. Alternatively

point the sensor into free hand (this will shield the sensor from external fields). If the display does

not read 0.00, adjust the ZERO knob until the display reads 0.00. Once set, the zero should not

have to be reset unless the control has moved.