The Measurement Range - Elcometer 500 User Manual

7 SETTING THE GAUGE PARAMETERS (continued)
Readings & Differential (Δ) - Model T

(Figure 10); T he last reading is displayed
together with the variation from the NDFT
(Nominal Dry Film Thickness) value set via
Menu/Limit Memories/Create Limit Memory/
Set NDFT.
To setup the display:
1 Press Display/Setup Display/Top Display (or Bottom Display as
required).
 
2 Use the
'Select'.
Note: If 'None' is selected for one half and 'Readings' or ' Run Chart' for the other half, t he
readings or run c hart will fill the whole screen. If any other c ombination of o ptions
is selected; the data will b e shown in the top or bottom display as s pecified.

7.4 THE MEASUREMENT RANGE

The Elcometer 500 uses the 'Pulse-Echo' measurement technique (the
total thickness from the base of the probe to the material density
boundary is measured), to non-destructively measure coatings up to
10mm (390mils) thick on concrete and other similar substrates.
Whilst the Elcometer 500 can measure up to 10mm (390mils) of a typical
epoxy coating, depending on the probe used, more sound absorbent
coatings such as rubber may reduce the measurement range of the
gauge. Contact Elcometer for further information.
7.5 MEASUREMENT SUBSTRATES
The Elcometer 500 has been designed to measure coatings on concrete
and other similar substrates. These include drywall, plasterboard,
concrete block, brick, stone, cinder block and other cementitious
materials.
The Elcometer 500 is ideally suited for measuring coatings on rough and
smooth substrates alike. Due to the nature of ultrasonic technology,
however, as the roughness increases the stability of the reading - as
indicated by the signal strength indicator to the right of the display - may
deteriorate. If the signal strength indicator is green, it is a valid and
stable reading otherwise position the probe nearby on a different area of
the test surface until a strong signal is received.
c
Not available in 'Scan Mode' - see Section 5.3 'Taking a Reading in Scan Mode - Model T' on page en-8.
www.elcometer.com
c
softkeys to highlight the required option and press
Figure 10: Readings &
Differential
en-12
R