Impact Products Digital Concrete Test Hammer CN652 - Manual (Page 10)

Shape of the test specimen: Shape coefficient also applies for:
2nd Line: 200/200/200 Cylinder Ø 200 x 200 mm
3rd Line: 150/150/150 Cylinder Ø 150 x 150 mm
4th Line: Ø 150/300 mm Cylinder Ø 6” x 12”
4.5.2 Time Coefficient
〈t
There are two options available:
- Determining ones own time coefficient
- Time coefficient as a function of the carbonate penetration depth
Ones Own Time Coefficient
• Select
〈t, and enter the time coefficient determined. See example under
”Determining Time Coefficient”.
Time Coefficient as a Function of the Carbonate Penetration Depth
The reduction factors derived from the Chinese standard, JGJ/T23-92 and based
on the carbonate penetration depth ”d” (in mm) provide a further option (from
EPROM version 2.0).
• Select ”d”, and set a value between 1 and 6 for the defined carbonate
penetration depth (in mm). For carbonate penetration depths over 6 mm, enter 6.
The corresponding reduction factor is set automatically.
4.5.3 Eliminate Outliers
The following 4 functions can be selected: ”0”, M1, M3 and Mx. Using function
”0”, individual values can be deleted manually. Using the functions M1, M3 and
Mx, values are eliminated automatically.
”0”: Eliminating Individual Values
Individual values can only be deleted with this function. • Too high or too low
measured values can be eliminated directly during the measurement process
with the PRINT key.
M1: Eliminate Highest and Lowest Value
The highest and lowest measured values are deleted provided at least 6
measured values are present.
M3: Delete Values with Deviations of over 20 %
Values which deviate 20 % or more from the mean value after completion of a
measurement series are deleted. The number of test impacts shown on the
display is reduced by the number of deleted test impacts. Four beeps are output
to request replacement of the test impacts deleted by new ones. The result of the
measurement appears on the display as soon as ”n” test impacts have been
successfully performed.
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