JT2003
Professional Multimeter
User Manual
22
Note:
Phase sequence measurement condition:
Above AC 80V, frequency is 40 Hz to 80 Hz,
the flashing " " symbol will be displayed
on LCD screen and it will keep on waiting if
range of frequency response is exceeded.
Multi-harmonic anti-interference decoding
mode is set in the chip of JT2003. The
high-frequency interference signal will
be filtrated by a special filter circuit built
in the chip, this will be suitable for the
measurement in variable-frequency
voltage fields. Measurement phase
sequence lock time is about 10s more or
less.
When measuring JT2003 products in
variable frequency condition, due to
the impact of multiple-harmonic PWM,
measurement phase sequence lock time is
much slower {about 30s more or less), and
the frequency range is only suitable from
50 Hz to 80 Hz, and the unstable state of
phase sequence measuring may occur.
1)
2)
3)
Figure 2
