Impact Products Digital Concrete Test Hammer CN652 - Manual (Page 12)

5 Measuring Process
5.1 Measuring Procedure
Preferably perform measurements at temperatures between
10 °C and 50 °C only.
The items in (brackets) are illustrated in Fig. 5.4. Perform test impacts with the
concrete test hammer on a smooth, hard surface, without the cable connected to
the display unit, before taking any measurements you are going to evaluate.
• Enter the basic settings as described under ”Settings”.
•
Use a grindstone to smoothen the test surface.
Fig. 5.1 Preparing the test surface
Warning!
The impact plunger (1) generates a recoil when it deploys. Always hold the
concrete test hammer in both hands!
• Position the concrete test hammer perpendicular to the
test surface.
• Deploy the impact plunger (1) by pushing the concrete
test hammer towards the test surface until the
pushbutton (6)
springs out.
Fig. 5.2 Deploying the impact plunger (1)
Danger!
Always hold the concrete test hammer in both hands, perpendicular to the
test surface, before you trigger the impact!
Each test surface should be tested with at least 10 impacts. The individual
impact points must be spaced at least 20mm apart.
• Position the concrete test hammer perpendicular to and
against the test surface. Push the concrete test
hammer against the test surface at moderate speed
until the impact is triggered (a high beep acknowledges
registration).
•
Repeat this procedure for the whole measurement
series.
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