Operation manual of ZBL-R800, ZBL-R630, ZBL-C310A
Hotline: (86)010-51290405 Fax: (86)010-51290406
50
When sensor approaches rebar, the scroll bar will lengthen
gradually, or the scroll bar will shorten gradually. The location
of longest scroll bar is the exact position of rebar.
3.4.6.3 To orientate rebar
You can take following two methods to orientate rebar:
1) After rebar location, rotating sensor above the rebar, the current
thickness value and signal value in the upper left corner will change
accordingly. When signal value is maximum and current thickness
value is minimum value, at that time, sensor is parallel with rebar and
the direction of sensor is the direction of tested rebar within concrete.
2) Measuring rebar location with two parallel measuring lines
respectively, the connection of two points is the location of rebar.
3.4.6.4 To measure thickness of cover
1. Automatic
interpretation
Sensor parallels with rebar and sweeps above rebar in a uniform speed
along the vertical direction of rebar. Instrument produces a voice of
buzzing suggesting sensor goes over rebar, then value of “cover” will
automatically update to the current thickness value of concrete.
This method applies to rebar space larger than described in table 3.1.
Table 3.1
The rebars space a1, b1, a2, b2 is shown in fig.3-37.
The tested rebar on the
upper level
The tested rebar on the below
level
Thickness of
cover
Parallel
rebars
space a1
Vertical
rebars
space b1
Thickness
of cover
Parallel
rebars space
a2
Vertical
rebars space
b2
15 70 80 15 70 90
30 80 100 30 80 110
45 100 120 45 100 130
60 120 140 60 120 150
