Myron L EP-10 - Manual (Page 2)

1. Turn the Range Switch to the desired range. if you don’t
know which range to use, set it to 1000.
2. Rinse the cell cup three times with the sample you want
to test. (For very hot or very cold samples see
TEMPERaTuRE CoMPEnSaTion below.)
never fill the cell by dipping the meter into
water!
3. Fill the cell with another sample to at least 1/4” (6mm)
above the upper electrode.
4. Press the black button.
5. Read the dial’s black scale value indicated by the
pointer. if the pointer is very low on the left or goes off
the scale to the right, try the next lower or higher range.
6. Multiply the dial’s black scale value by the range setting
to determine conductivity in micromhos (microsiemens).
7. if the pointer goes off the scale to the right on the x1000
range, use an RE-10 range extender (see
aCCESSoRiES).
note:
When you are finished with the meter, RinSE THE CELL
CuP with clean water, preferably distilled or deionized.
temperature compensation: For very hot or very
cold solutions, let the three rinse samples each remain in
the cell for several seconds. Then immediately fill the cell
with the sample you want to test (step 3 above). This
allows the automatic temperature compensation feature
time to work properly.
resistivity measurement: Model EP only. accurate
measurement of high purity water is difficult even under
controlled conditions. Water temperature and even carbon
dioxide (Co
2
) in the atmosphere will greatly influence
resistivity. use the following methods for best accuracy:
1. Turn the range switch to the x.1 range (with the “Ω”
symbol around it).
2. Hold your meter close to the high purity water outlet.
While pressing the button, allow the water to flow into
the Cell Cup and out again, continuously purging the
cell. Do not allow air bubbles to collect.
3. as the cell is washed clean of trace contamination, the
reading will drop and eventually stabilize. Read the
resistivity directly in megohms on the red scale. do
not multiply the dial reading by the range switch value.
note:
The closer the tested water temperature is to 25ºC
(77ºF), and the less it is exposed to air, the more accurate
your reading will be.
caution
always rinse the cell cup with pure water immediately
after use or cleaning. This will prevent the build-up of
unwanted deposits and possible contamination of the next
sample.
do not use with samples hotter than specified. The
readings WiLL noT be accurate.
do not splash solvents such as lacquer thinner, acetone,
benzene or chlorinated solvents on the plastic case.
do not fix or modify the meter. That will void your
warranty. See SERviCE for details or consult Myron L
Company
do not dip the instrument into water. if water
does get inside the instrument, see MainTEnanCE for
instructions on drying it.
MODEL EP MODEL EP MODEL EP10
using your meter