Myron L RO Meter RO-1 Скачать руководство пользователя страница 4

CALIBRATION

STANDARD SOLUTIONS:

 A  Standard Solution has a known

conductivity and ppm value. Your meter was calibrated at the factory

using Myron L Company 442-1000 Standard Solution. You can keep

your meter accurate by using this same Standard Solution (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. Test a sample of Myron L 442-1000 Standard Solution.

CAUTION:

 Throw the Standard Solution away as you use it. Don't

put the used samples back in the bottle.

2. If the Meter does not indicate the 1000 ppm value on the Standard

Solution bottle's label, first clean the cell. For directions on how

to do this see CELL CUP inside. 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

and "S" button (see photo below left) so you can find them 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 1000

ppm value on the Standard Solution label.

4.  Press the internal "S" 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 feature described below is intended as a quick field calibration

check. It is not a replacement for calibration with Myron L 442-1000

Standard Solution.

INTERNAL STANDARD:

 An INTERNAL STANDARD value for each

meter is on the label on the bottom cover of each meter . Use it

between normal calibrations as a field check of your meter's accuracy

.

To verify your meter's calibration:

1. Press the internal "S" button.

2. If the reading matches the INTERNAL STANDARD value on the

bottom  label, your meter is in calibration. If not, see FIELD

CALIBRATION.

MAINTENANCE

BATTERY CHECK

Press the internal "S" button. If the pointer does not reach the

INTERNAL  STANDARD  value, readjust the "S" (see FIELD

CALIBRATION).  If the pointer will not reach the INTERNAL

STANDARD value, the battery should be replaced.

BATTERY REPLACEMENT

Detach the battery connector. Pull on the plastic strap to remove

the battery. Replace with a fresh zinc carbon or alkaline 9 volt battery

.

Reinsert the plastic strap to secure battery. Replace the bottom cover.

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 electrode,

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 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 the 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 either of

the 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.

FIELD CALIBRATION/MAINTENANCE

1. Remove the bottom cover using fingernails or a small screwdriver

to loosen the front or rear edge.

2. Press the internal "S" button and adjust the Calibration Control

until the meter reading is the same as the INTERNAL STANDARD

value.

NOTE:

If the meter will not adjust to the INTERNAL STANDARD value the

battery should be replaced. See MAINTENANCE above right.

3. Replace the bottom cover.

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Business Park Dr

. Vista, CA 92081

  

 

(760) 727-3711

    

 

(760) 727-4427   

 

www.appliedmembranes.com  

 

 

[email protected]

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