1.3.
Specification
1.3.1.
Mechanical Index of Rebound Apparatus
Metrological verification specifications:
Verification Regulations of Rebound Apparatus
(JJG_817-2011)
Impact energy:
0.225kgm (2.207J±0.100J), for testing ordinary building and
bridge construction
Rigidity of recoiling tension spring:
785±30.0N/m
Length of pointer:
20.0±0.2mm
Friction of pointer:
0.65±0.15n
Spherical radius of recoiling rod:
R25±1.0
Active length of recoiling tension spring:
61.5±0.3mm
Impact length of recoiling rod:
75.0±0.3 mm
Initial bouncing position of recoiling hammer:
graduated scale“0”+1
Calibration value on steel anvil:
80±2
Graduating position “100” of shell calibration:
overlap with the side of positioning gap
of calibrator cover plate of the rebound apparatus.
Consistency of test indicating value:
≦
±1
Operating Temperature:
-4º
C
-+40º
C
1.3.2.
Appliance Indexes
Display screen:
high-light blue OLED display screen
Resolution:
256X64
Mass Memory:
Maximally can store components: 1000
Maximum number of testing zones:
16
Maximum number of test points in a testing zone:
16 times
National unified curve:
1
Customized curve:
2
Battery:
can charge high-capacity Li-ion battery
Data interface:
Mini-USB interface
Types of sensor:
non-contact optical coupler type sensor
Strength unit:
Mp, N/mm
2
, Kgf/ mm
2
Communication mode:
serial port communication, wireless communication (optional)
1.4.
Parameter Specification
Test times (test point), for each test point in each testing zone, according to
Regulations
,
the test times are 16.
Testing zone, a test unit for testing concrete compressive strength of structure or
component, with an appropriate area no more than 0.04
㎡
.
Equivalent value of concrete strength in testing zone refers to the concrete compressive
strength value of the tested unit calculated based on the average rebound value and
carbonization depth of testing zone via strength-measuring curve.
Test angle, casting surface, if the rebound apparatus is not in horizontal direction or the
tested surface is non-concrete casting side, after setting the test angle and casting surface
respectively, the apparatus can automatically conduct angular correction and casting
surface correction of rebound value.
Содержание PCE-HT 224E
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