CME4/0908
Concrete Encounter CME4
User Guide
7
also be noted that there seems to be no linear correlation
between moisture content measurements and lbs
emission measurements as obtained using calcium
chloride testing methods.
4. The middle 0-4 CM~ scale is based on equivalent
readings taken when testing on concrete with a calcium
carbide gauge. These are intended as a guide and are not
meant to replace the calcium carbide readings when
specified. When Calcium Carbide testing is specified it is
recommended that the Tramex CME4 is used to take
readings until the screed has reached satisfactory
moisture levels and then the calcium carbide test is
carried out to confirm the readings according to the
specification.
5. Alternatively, the lower, 0 to 100, reference scale can be
used for comparative readings. This scale is not to be
interpreted as a measurement of percentage moisture
content, or relative humidity. It is not a relative humidity
reading and it does not have any linear correlation with
Relative Humidity measurements. This scale should be
regarded as a comparative or qualitative scale only. This
scale is included to facilitate comparative testing of
different areas where direct contact with the bare
concrete surfaces may not be possible due to some form
of thin coating or covering on the concrete, or additive in
the concrete that could influence the readings. Readings
from the reference or relative scale are comparative only
and of help in identifying areas with moisture problems.
6. The CME 4 will automatically power-off after ten
minutes if no button is pressed or if no change in meter
reading is detected. If a button is pressed or the meter
reading changes, the power-off will be extended for an
additional 10 minutes.
7. To freeze readings press the HOLD button once. While
on HOLD, the upper LED will flash slowly. If the unit
powers OFF while on HOLD, the frozen meter reading is
digitally memorized and restored next time ON/OFF is
selected. To remove freeze, press HOLD button again.
