Myron L 4P (includes Addendum 10-01) - Manual (Page 5)

XV. CONDUCTIVITY CONVERSION to
TOTAL DISSOLVED SOLIDS (TDS) . . . . . . . . . . . . . . .26
A. How it’s Done . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
B. Solution Characteristics . . . . . . . . . . . . . . . . . . . . . . . .26
C. When does it make a lot of difference? . . . . . . . . . . . 27
XVI. TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVATION . . . . . . . . . . . . . . . . . . . . . . . . . . .27
A. Conductivity Characteristics . . . . . . . . . . . . . . . . . . . . 27
B. Finding the Tempco of an Unknown . . . . . . . . . . . . . 28
C. Finding the TDS Ratio of an Unknown . . . . . . . . . . . 28
XVII. GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Addendum
I. HIGH RESISTIVITY MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . .1
Offset Zero Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Cell Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
II. USER MODE GAIN CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . 3
A. Calibration of Ultrameter for Use in User Mode . . . . . 3
B. Setting User mode Calibration “Link” . . . . . . . . . . . . . 3
C. Canceling User Mode Calibration “Link” . . . . . . . . . . . 4
* CHECKING YOUR INSTRUMENTS SOFTWARE VERSION . . . . . . . . . 5
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I. INTRODUCTION
Thank you for selecting the Ultrameter™ Model 4P, one of the Myron L
Company’s latest in a new line of instruments utilizing advanced
microprocessor-based circuitry. This circuitry makes it extremely accurate
and very easy to use (see pages 2 & 3 for Features and Specifications on
this and other models). For your convenience, your Ultrameter has a brief
set of instructions on its bottom, and a pocket sized card with abbreviated
instructions is included with the instrument.
Special note ...... Conductivity, Resistivity, and TDS require mathematical
correction to 25°C values (ref. Temperature Compensation, pg. 23). On
the left of the Ultrameter’s liquid crystal display is shown an indicator of
the salt solution characteristic used to model temperature compensation
of conductivity and its TDS conversion. The indicator can be KCl, NaCl,
442 or USER. Selection affects the temperature correction of
conductivity, and the calculation of TDS from compensated conductivity
(ref. Conductivity Conversion to Total Dissolved Solids (TDS), pg. 26).
The selection can affect the reported conductivity of hot or cold
solutions, and will change the reported TDS of a solution. Generally,
using KCl for conductivity, NaCl for resistivity, and 442™ (Natural Water
characteristic) for TDS will reflect present industry practice for
standardization. This is how your instrument, as shipped from the factory,
is set to operate.
II. RULES of OPERATION
A. Operation
Using the instrument is simple:
•
Rinse the conductivity cell with test solution 3 times and refill.
• Press the desired measurement key to start measurement.
Pressing the key again does no harm and restarts the 15 second
“off” timer.
• Note the value displayed or press the MS key to store
(ref. Memory Storage, pg. 16). It’s that simple!
B. Characteristics of the Keys
• Though your Ultrameter has a variety of sophisticated options, it
is designed to provide quick, easy, accurate measurements by
simply pressing one key.
• All functions are performed one key at a time.
• There is no “off” key. After 15 seconds of inactivity the
instrument turns itself off (60 seconds in CAL mode).
• Rarely will a key be required to be held down (as in Procedure to
Select a Solution, pg. 10 or Conductivity or TDS Calibration, pg.
14).
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