Myron L EP-10 - Manual (Page 3)

standard solutions: a Standard Solution has a
known conductivity and ppm. Your meter was calibrated at
the factory using niST Standard Solutions. You can keep
your meter accurate by using the same niST Standard
Solutions. To pick the right Myron L Company Standard
Solution for your meter see aCCESSoRiES.
How often you calibrate your meter depends on how
much you use it. For once a day use, recalibrate it every
three months.
checking calibration
1. Turn the Range Switch to the x1000 range.
2. Test a sample of appropriate Standard Solution.
caution: Throw the Standard Solution away as you use
it. Don’t put the used samples back in the bottle.
3. if the meter does not indicate the same value as is on
the Standard Solution bottle’s label, first clean the cell.
For directions on how to do this see CELL CuP. Rinse
the cell thoroughly and test the Standard Solution again.
if the meter still does not indicate the correct value,
recalibrate it as described below.
to recalibrate the meter
1. Remove the bottom cover using fingernails or a small
screwdriver to loosen the front or rear edge. identify the
Calibration Control (see photo below) so you can find it
by touch while calibrating.
2. Test another sample of the Standard Solution (be
careful to not splash solution inside the meter).
3. adjust the Calibration Control until the meter indicates
the value that is on the Standard Solution label.
maintenance
battery check
Models EP and EP-10 have a battery indicator glow light
visible through the small hole on the lower right-hand
corner of the meter face plate. if this light fails to glow
when the black button is pressed, replace the battery.
battery replacement
To replace the battery detach the battery connector.
Pull on the plastic strap to remove the battery. Replace
with fresh zinc carbon or alkaline 9 volt battery. Reinsert
the plastic strap to secure battery.
cell cup
Self-conditioning of the built-in electrodes occurs each
time the button is pressed with a sample in the cell cup.
This ensures consistent results each time. With some
samples a small downward swing of the pointer is a result
of this conditioning action. This action is powerful and
removes normal films of oil and dirt. However, if very dirty
samples — particularly scaling types — are allowed to dry
in the cell cup, a film will build up. This film reduces
accuracy. When there are visible films of oil, dirt or scale
in the cell cup or on the electrodes, scrub them lightly with
a small brush and household cleanser. Rinse out the
cleanser and the meter is ready for accurate
measurements.
water inside the meter
Your Myron L EP meter is a rugged instrument and will
withstand water exposure around its cell, meter
movement, and switches. However, care should be taken
to keep water from leaking in around the bottom cover. it
is not sealed (to prevent condensation from forming).
if water is relatively clean (i.e., tap water or better), and
there are only a few drops inside the meter, dry it as
described below. Large amounts of water, or corrosive or
very dirty solutions will almost certainly damage the meter
movement or electronics. Such meters should be returned
to the Myron L Company for repair.
To dry your meter:
1. Shake excess water out of the inside of the meter.
2. Dab the exposed surfaces dry with an absorbent cloth
or tissue. avoid pushing any water into the Calibration
Control or switches.
3. air dry the meter in a warm area with the bottom cover
off. allow several hours for thorough drying.
if the water entered through a leak in the case or cell, or
if the instrument shows erratic readings or other unusual
behavior, return it to the Myron L Company for servicing.
warranty/service
Myron L EP and EP10 Meters have a limited two year warranty. if
your instrument fails to operate properly, check the battery and
calibration. if it still fails to function properly, return it prepaid to the
Myron L Company.
Faulty instruments may be returned to us without prior permission.
meters within two year warranty period:
Failures due to materials or workmanship will be repaired or
replaced (our option) without charge if returned freight prepaid. if
failure is deemed by the factory to have been caused by abuse or
tampering, the following procedure will apply.
instruments/controls out of warranty:
Diagnosis will be made and repairs completed providing the repair
charges are $90.00 or less.
note: actual repair charges may be less than this amount.
We will diagnose (but not repair) a returned meter and fax an
estimate of charges if anY of the following apply:
1. Repair charges will be more than $90.00.
2. You specifically request an estimate of required repairs and
charges.
3. The cost of required repairs exceeds one-half the list price of a new
instrument.
4. The instrument is over ten years old. Because of component
changes and improvements, such instruments can no longer be
repaired.
note: unrepaired meters are discarded unless you want them
returned to you. if so, there is currently a $35.00 charge per
unrepaired instrument to cover diagnosis and handling.
This warranty is limited to the repair or replacement of the Myron L
EP or EP10 Meter only. The Myron L Company assumes no other
responsibility or liability.
standard solutions
Your EP Meter has been factory calibrated with the
appropriate niST traceable Standard Solutions. all Myron L
Company Conductivity Standard Solutions are traceable to
the national institute of Standards and Technology and are
within 1.0% of Potassium Chloride reference solutions.
The concentrations of the reference solutions are
calculated from data in the international Critical Tables,
vol. 6.
Battery Strap
Calibration Control
Lower Electrode
(inside cell)
calibration/maintenance accessories