FIELD CALIBRATION/MAINTENANCE
1. Remove the bottom cover using fingernails 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.
EASY STEPS TO DOUBLE RANGE
ACCESSORIES
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 specified, 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 three decades ago.
Sodium Chloride: For every ppm 442 Standard Solution, there
is a ppm sodium chloride (NaCI) solution which will have the same
conductivity. The parts per million of the equivalent NaCI solution
is on each Standard Solution label. Instruments calibrated to NaCI
standards are set using equivalent NaCI 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.
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-filled 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.
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.
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