-13-
During test, according to various phase relationship, inductive or
capacitive loads, phase sequence and polarity can be judged. If U1I1 phase
display within 0
°～
90
°
range, the measured load is perceptual; if within
270
°～
360
°
range, the measured load is capacitive. If the phase display
near 120
°
, it is positive phase sequence, and the same polarity; if near
120
°
or 300°, it is positive phase sequence, and the opposite polarity (may
be current clamp or wire reverse connection). Other conditions for negative
phase sequence (except default phase).
Ⅶ．
Battery Replacement
Take note of the battery polarity, the polarity must be
properly installed, otherwise it causes damage to
the instruments
Batteries replacement is prohibited in hazardous
area
Must use qualified alkaline batteries
（
1.5V AA×6
）
Old and new batteries are not allowed to mix in use.
1
．
“ ”is displayed when the power voltage is lower than
7.8V
～
8V,indicating that the battery should be replaced as following.
2
．
Press
OFF
to switch off
3
．
Use the cross screwdriver to loose a screw on the battery cover, open
the battery cover.
4
．
Remove the old batteries and replace a new battery, please take note
of the battery polarity.
5
．
Cover the battery cover, tighten the screws.
6
．
Press
ON
to switch on to check whether the battery is successfully
replaced, repeat step 2 if it doesn’t work.
7
．
Take out the batteries if the instrument will not be used for a long time.