Myron L 512T5D - Manual (Page 3)

CHECKING CALIBRATION
1. Test a sample of the appropriate Standard Solution.
CAUTION: Throw the Standard Solution away after using it. Do
not put the used samples back into the bottle.
2. If the PoolMeter does not indicate the same value as is on
the Standard Solution bottle’s label, fi rst clean the cell. For
directions on how to do this see CELL, pg. 3. Rinse the
cell thoroughly and test the Standard Solution again. If the
PoolMeter still does not indicate the correct value, recalibrate
as described below.
TO RECALIBRATE THE METER
1. Remove the bottom cover using your fi ngernails or a small
screwdriver to loosen the front or rear edge. Identify the
Calibration Control (see photo pg. 1) so you can fi nd it by
touch while calibrating.
2. Test another sample of the Standard Solution (be careful to
not get any solution inside the meter).
3. Adjust the Calibration Control until the meter indicates the
value that is on the Standard Solution label.
4. Select the “S” position.
5. Press the button. Compare the meter reading to the
INTERNAL STANDARD value on the meter’s bottom label. If
they are noticeably different, mark the new value in place of
the old one.
NOTE:
The PoolMeter may be calibrated to read either 442 or NaCI
parts per million. Calibrating one will automatically calibrate
the other.
INTERNAL STANDARD: An INTERNAL STANDARD value
for each meter is on the label on the bottom cover of each
meter. Use it as a reference between normal calibrations as
a fi eld check of your meter’s accuracy. To verify your meter’s
calibration:
1. Select the “S” position.
2. Press the button.
3. If the reading matches the INTERNAL STANDARD value on
the bottom label, your meter is in calibration. If not, see FIELD
CALIBRATION below.
NOTE:
The feature described above is intended as a quick fi eld
calibration check, or for the Range Doubling technique. It is
not a replacement for calibration with a Standard Solution.
FIELD CALIBRATION / MAINTENANCE
1. Remove the bottom cover using your fi ngernails or a small
screwdriver to loosen the front or rear edge.
2. Select the “S” position.
3. Press the button.
4. Adjust the Calibration Control until the meter reading is the
same as the INTERNAL STANDARD value on the bottom
label.
5. Replace the bottom cover.
RANGE DOUBLING
1. Remove the bottom cover.
2. Select the “S” position.
3. While pressing the button, adjust the Calibration Control until
the meter reads one-half the INTERNAL STANDARD value
shown on the bottom label. For example:
If the INTERNAL STANDARD value is 4200, adjust the
Calibration Control until the reading is at 2100.
4. Test your sample (take care to keep the inside of the meter
dry). Multiply the reading of the sample tested by two. For
example: If the meter reading is 3200, the actual value of the
sample tested is 6400 (3200 x 2).
NOTE:
After completing tests requiring Range Doubling, reset “S” to
its proper value and replace bottom cover.
MAINTENANCE
BATTERY CHECK
1. Select “S” position.
2. Press the button. Adjust the Calibration Control to maximum.
3. If the meter reads less than full scale, the battery should
be replaced. Remove the bottom cover. Detach the battery
connector. Pull on the vinyl strap to remove the battery.
Replace with a fresh 9 volt battery. Re-insert the vinyl strap to
secure battery.
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