Model 532T1 shown
Range Switch
(set on Internal Standard)
Cell Cup
Button
Upper Electrode
Meter Zero
Adjust
Pointer
THREE RANGE DS METERS™
OPERATING INSTRUCTIONS
User’s Manual for Models
532T1
532T2
532M1
DESCRIPTION
This manual describes your Myron L DS Meter™, tells
you how to use it, and how to keep it working accurately
for many years.
Your model 532 three range DS Meter is a compact
instrument which operates on the principle of electrical
conductivity. It will quickly determine the conductivity or
ppm/Total Dissolved Solids of almost any solution. Model
532M1 has a dial calibrated in micromhos (µmhos), which
is equivalent to the metric microsiemens (µS). Models
532T1 and 532T2 convert the conductivity directly into
parts per million (ppm) of Total Dissolved Solids. All are
3.4” x 4.5” x 4.0” (85 x 129 x 126mm) and weigh less than
one pound (.45 kg). DS Meters are completely selfcontained. The built-in cell is automatically temperature
compensated from 50º to 160ºF (10º to 71ºC). They are
powered by a 9 volt battery good for at least 2000 tests, or
one year shelf life.
MODEL RANGES
532T1 0-50, 0-500, 0-5000 ppm
532T2 0-25, 0-250, 0-2500 ppm
532M1 0-50, 0-500, 0-5000 µmho
By using an RE-10 Range Extender (see
ACCESSORIES), the maximum range of each meter may
be increased ten times.
The pictures in this manual show the major operating
parts of your Myron L DS Meter. Handle your DS Meter
and identify these parts to become familiar with it.
USING YOUR METER CALIBRATION
Battery Strap
Master Calibration Control (X1000)
Lower Electrode
(inside cell)
X100
Trimmer
X10
Trimmer
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 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 value by the range setting to determine
parts per million (ppm) Total Dissolved Solids on the
532T models or the conductivity in micromhos (µmhos)
on the 532M1.
7. If the pointer goes off the scale to the right on the x1000
range, try RANGE DOUBLING (see inside) or an RE-10
Range Extender (see ACCESSORIES).
NOTE:
When you are nished 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 ll the cell
with the sample you want to test (step 3 above). This
allows the automatic temperature compensation feature
time to work properly.
CAUTION
DO NOT use with samples hotter than 160ºF (71ºC).
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 x 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.
STANDARD SOLUTIONS: A Standard Solution has a
known conductivity and ppm. Your meter was calibrated at
the factory using NIST traceable Standard Solutions. You
can keep your meter accurate by using these same
Standard Solutions. To pick the right Standard Solution for
your meter see ACCESSORIES.
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 DS Meter does not indicate the same value as is
on the Standard Solution bottle’s label, rst clean the
cell. For directions on how to do this see CELL inside.
Rinse the cell thoroughly and test the Standard Solution
again. If the DS Meter still does not indicate the correct
value, recalibrate it as described below.
TO RECALIBRATE THE METER
1. Remove the bottom cover using ngernails or a small
screwdriver to loosen the front or rear edge. Identify the
three Calibration Controls (see photo below left) so you
can nd them by touch while calibrating.
2. Test another sample of the Standard Solution (be
careful to not to splash solution inside the meter).
3. Adjust the Master Calibration Control until the meter
indicates the value that is on the Standard Solution
label.
4. The Master Calibration Control adjusts all ranges. For
best accuracy in the lower ranges, use the
recommended Standard Solutions for the x100 and x10
ranges. Use the x100 and x10 trimmers to recalibrate
those ranges as in steps 2 and 3 above.
5. Turn the Range Switch to “S” and 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:
A 532T (ppm) Meter may be calibrated to read either
442 or NaCl parts per million, but not micromhos. A
532M1 (conductivity) Meter may only be set to read
micromhos.
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 eld check
of your meter’s accuracy.
To verify your meter’s calibration:
1. Turn the Range Switch to “S” and press the button.
2. If the reading matches the INTERNAL STANDARD value
on the bottom label, your meter is in calibration. If not,
see FIELD CALIBRATION.
NOTE:
The feature described above is intended as a quick eld
calibration check, or for using the range doubling
technique. It is not a replacement for calibration with
Standard Solution.
3. Adjust Master
Calibration Control
to ½ value shown
on la bel.
4. Test sample.
5. Double Dial
Reading
1. Turn Range
Switch to “S” position.
2. Press Button
EASY STEPS TO DOUBLE RANGE
FIELD CALIBRATION/MAINTENANCE ACCESSORIES
1. Remove the bottom cover using ngernails or a small
screwdriver to loosen the front or rear edge.
2. Press the button and adjust the Master Calibration
Control until the meter reading is the same as the
INTERNAL STANDARD value.
3. Replace the bottom cover.
RANGE DOUBLING
1. Turn the Range Switch to “S”. Remove the bottom
cover.
2. While pressing the button, adjust the Master
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 4.2, adjust the Master Calibration Control until the
reading is 2.1.
3. Test your sample (take care to keep the inside of the
meter dry). Multiply by two the reading of the sample
tested. For example: If the meter reading is 3.2 on the
x1000 range (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.
CELL
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 lms of oil and dirt. However, if very dirty
samples — particularly scaling types — are allowed to dry
in the cell cup, a lm will build up. This lm reduces
accuracy. When there are visible lms 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 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.
MAINTENANCE
BATTERY CHECK
1. Turn the Range Switch to “S” and press the button.
Adjust the Master Calibration Control to maximum.
2. 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 zinc carbon or alkaline 9
volt battery. Reinsert the vinyl strap to secure battery.
SERVICE
Any service required other than battery replacement,
cleaning, or calibration must be referred to the Myron L
Company. If you have any questions about this instrument,
its use, or a particular application, please contact the
Myron L Company.
STANDARD SOLUTIONS
Your DS Meter™ has been factory calibrated with the
appropriate NIST traceable Standard Solution. All Myron L
conductivity Standard Solution bottle labels show three
values: ppm 442™, ppm sodium chloride, and
conductivity in micromhos.
442™: Unless otherwise specied, the calibration used
for all DS Meters is the “442” standard. The 442 Standard
Solutions™ consist of the following salt ratios: 40% sodium
sulfate, 40% sodium bicarbonate, and 20% sodium
chloride. This salt ratio has conductivity characteristics
closely matching natural waters and was developed by the
Myron L Company over four decades ago.
Sodium Chloride: For every ppm 442 Standard
Solution, there is a ppm sodium chloride (NaCl) solution
which will have the same conductivity. The parts per
million of the equivalent NaCl solution is on each Standard
Solution label. Instruments calibrated to NaCl standards
are set using equivalent NaCl values.
Conductivity: All Myron L Company 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.
RE-10 Range Extender
ACCESSORIES CONTINUED
RECOMMENDED STANDARD SOLUTIONS
MODEL/RANGE SOLUTION NUMBER
532T1
x 10 442-30
x 100 442-300
x 1000 442-3000
with RE-10 442-30,000
532T2
x 10 442-15
x 100 442-150
x 1000 442-1500
with RE-10 442-15,000
532M1
x 10 442-30
x 100 442-300
x 1000 442-3000
with RE-10 442-30,000
RANGE EXTENDER
The RE-10 Range Extender is a useful accessory for
testing high conductivity/ppm solutions beyond the normal
range of your DS Meter™. Inserting the RE-10 into a
sample-lled cell cup increases the maximum range ten
times. Use the Range Extender whenever the reading is
off the scale.
USING THE RE-10
1. Fill the cell cup three times to rinse it, but each time
insert the Range Extender to rinse it also.
2. Fill the cell cup with your sample. Push the Range
Extender into the cell cup, seating the O-ring seal.
3. Use and read the DS Meter in the normal manner.
Multiply the reading by 10.
4. For best accuracy, repeat the complete test with a
fresh sample.
5. When you’re done testing, remove the Range
Extender. Thoroughly rinse the cell cup and Extender
with clean water (preferably distilled or deionized) to
eliminate dried salts build-up. This is extremely
important when the instrument will be used to test high
purity water.
CALIBRATING THE RE-10
1. Calibrate x1000 range of meter (without RE-10) with
Standard Solution
2. Fill cell cup with appropriate high conductivity
Standard Solution (442-15,000 or 442-30,000).
3. Insert RE-10 and press the button. Multiply the reading
by 10 and compare it with the value on the Standard
Solution label. It they are not the same the RE-10 must
be recalibrated.
NOTE: DO NOT adjust the Conductivity Calibration
Control.
4. Adjust the white insert of the Extender as follows:
If the reading is too high — push or tap inward.
If the reading is too low — twist or pull outward with pliers.
NOTE: The Range Extender is factory calibrated to a
particular meter. It should be recalibrated if it is to be used
with another meter.
PORTA PAK
Carrying Case for use with
all Myron L DS/pDS meters.
Foam lined and molded of
sturdy ABS plastic
ORDERING
To order accessories contact your nearest stocking
distributor, or the Myron L Company.
The Myron L 532T1, 532T2, 532M1 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
authorization.
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 $80.00 or less.
NOTE: Actual repair charges may be less than this amount.
WARRANTY/SERVICE
an estimate of charges if ANY of the following apply:
1. Repair charges will be more than $80.00.
2. You specically 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.
Myron L 532T1, 532T2, 532M1 Meters only. The Myron L
Company assumes no other responsibility or liability.
Specications subject to change without noticePrinted in the U.S.A.
We will diagnose (but not repair) a returned meter and supply
This warranty is limited to the repair or replacement of the
2450 Impala Drive
Carlsbad, CA 92010-7226
TELEPHONE: +1-760-438-2021
FAX: +1-760-931-9189
www.myronl.com
© Myron L Company 2008
3ROM WEB 05-08
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