Brymen BM039F User Manual page 5

4
ACV (LPF added), & Line-level Hz (LPF added) (Model 039F only)
Inputs are made via the test lead terminals COM/+. Defaults at ACV Function. Press
the SELECT button momentarily to select Line-level Hz function.
Note:
ACV and Line-level Hz functions are bundled with LPF low-pass filter, and are capable
of dealing with most VFD (Variable Frequency Drives) signals. It also improves reading
stability in noisy electrical environments.
DCV
Inputs are made via the test lead terminals COM/+.