Myron L TH1 - Manual (Page 10)

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III. RULES of OPERATION
A. Operation
Using the instrument is simple:
• Individual or multiple parameter readings may be obtained by
filling individual sensors or entire cell cup area.
• Rinse the conductivity cell or pH sensor well (TPH1 &TH1) with
test solution 3 times and refill. Temperature and/or
measurement extremes will require additional rinses for
maximum accuracy.
• Press the desired measurement key to start measurement.
Pressing the key again restarts the 20 second auto “off” timer.
• Note the value displayed or press the MS key to store the
reading (ref. Memory Storage, pg. 16). It’s that simple!
B. Characteristics of the Keys
• Though your TechPro II 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 20 seconds of inactivity the
instrument turns itself off (60 seconds in CAL mode).
• Rarely is it necessary to press and hold a key (as in Procedure
to Select a Solution, pg. 9; or Cond. or TDS Calibration, pg. 11).
C. Operation of the Keys (See Instrument Illustration on pg. i)
1. Measurement Keys in General
The measurement keys turn on the instrument in the mode selected.
The parameter is shown at the bottom of the display, and the measurement
units appear at the right. Pressing a measurement key does this even
if you are in a calibration sequence and also serves to cancel a change
(ref. Leaving Calibration, pg. 11).
2. COND and TDS Keys (TPH1 & TP1)
These keys are used with solution in the Conductivity Cell.
Precautions:
• While filling cell cup ensure no air bubbles cling on the cell wall.
• If the proper solution is not selected (KCl, NaCl or 442), (ref.
Why Solution Selection is Available, pg. 9).
a. COND Key
Solution to be tested is introduced into the conductivity cell and a press
of displays conductivity with units on the right. On the left is
shown the solution type selected for conductivity.