
CALIBRATION/MAINTENANCE
STANDARD SOLUTIONS: A Standard Solution has a known
conductivityandppm.Your meter was calibrated at the factory using
NISTStandardSolutions.Youcankeepyourmeteraccuratebyusing
the same NIST Standard Solutions. To pick the right Myron L
Company Standard Solution for your meter seeACCESSORIES.
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. Ifthemeterdoesnotindicatethesamevalue asison theStandard
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. Removethebottomcover usingfingernailsorasmallscrewdriver
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.
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
ispowerful and removes normal filmsof 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 EPmeter is a rugged instrument and will withstand
water exposure around its cell, meter movement, and switches.
However,careshouldbetakentokeepwaterfromleaking 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.
Avoidpushing any water into the Calibration Control orswitches.
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 LEP and EP10 Meters have a limited one year warranty. If
your instrument fails to operate properly, check the batteries and
calibration. If it still fails to function properly, return it prepaid to the
Myron L Company.
Faultyinstrumentsmaybe returned to uswithoutproirpermission.
METERS WITHIN ONE 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:
Diagnosiswillbemade and repairs completed providingtherepair
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 ifANY 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 $25.00 charge per
unrepaired instrument to cover diagnosis and handling.
This warranty is limited to the repair or replacement of the Myron
LEP or EP10 Meter only. The Myron L Company assumes no other
responsibility or liability.
MAINTENANCE
BATTERY CHECK
Models EP and EP10 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 both batteries.
BATTERY REPLACEMENT
Toreplacethebatteriesdetachthebatteryconnectors.Pull on the
vinyl straps to remove the batteries. Replace with fresh zinc carbon
oralkaline9voltbatteries.Reinsertthevinylstrapstosecurebatteries.