© PCE Instruments
6
5
Operation
5.1
Measurement
Place the device on the sample and push it down on the surface with enough pressure. Read
out the hardness value from the display.
5.2
Further functions
5.2.1
Max hold function
Press the Maximum / Plus key. The
‘MAX’ indication appears in the upper right corner of the
display. The maximum value since the activation of the function is shown on the display. To exit
the max hold function, just press the Power / Menu Key. T
he ‘MAX’ indication disappears.
5.2.2
Average function
Press the Average / Minus key. The statistical measurement number indication
‘N’ and the
‘MAX’ indication appear on the display. Additionally, a ‘0’ appears on the left side of the display
and
‘0.0’ appears on the right side. The left value is the number of measurements taken. The
right value is the reading of the last measurement.
Take measurements until the number of measurements taken reaches the set value of the
statistical measurement numb
er ‘N’. Now the device calculates the average value of the
measurements taken. The result is shown on the right side of the display. In addition, an ‘AVE’
indication appears and the device emits an acoustic signal.
5.2.3
Setting the statistical measurement n
umber ‘N’
To set the statistical measurement number, press and hold the Power / Menu key for about 6
seconds until
the ‘
’ indication appears on the display. Press the Maximum / Plus key or
Average / Minus key to adjust the measurement number. The statistical measurement number
can be set between 1~29. Press the Power / Menu Key to return the standard measurement
mode.
Use the method of calculating the average of several measurements to figure out the
measurement value. The softer the sample is, the more measurements should be included. The
suggested number of measurements can be seen in the following tables:
Suggested number of measurements for aluminium alloys
(According to ASTM B648-2000)
Barcol hardness value
Min. number of measurements
50
6
60
5
70
4
80
3
