Myron L 9PTK - Manual (Page 14)

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4. pH and ORP/Fr Chl Keys
Measurements are made on solution held in the pH/ORP sensor well
(ref. pH and ORP/Free Chlorine, pg. 62). The protective cap is removed
and the sensor well is filled and rinsed with the sample enough times
to completely replace the storage solution.
After use, the pH/ORP sensor well must be refilled with Myron L
Storage Solution, and the protective cap reinstalled securely (ref.
Maintenance of the pH/ORP Sensor, pg. 11 and Cleaning Sensors, 2.
pH/ORP, pg. 50).
a. pH Key
A press of displays pH readings. No units are displayed on the
right.
b. ORP Key
A press of displays Oxidation-Reduction Potential/REDOX
reading in millivolts if the unit is in ORP mode, or Free Chlorine
reading in parts per million if the unit is in Free Chlorine mode.
5. CAL/MCLR Key
While measuring conductivity, TDS, or pH, a press of allows
you to enter the calibration mode. Once in CAL mode, a press of this
key accepts the new value. If no more calibration options follow, the
instrument returns to measuring (ref. Leaving Calibration, pg. 27).
If is held down for about 3 seconds, CAL mode is not entered,
but “sel” appears to allow Solution Selection (ref. pg. 22) with the
Up or Down keys. As in calibration, the cal key is now an “accept”
key.
While measuring ORP or Free Chlorine, holding cal down for about
3 seconds allows ORP mode selection (ref. pg. 21).
For titrations and LSI Calculator, the cal key steps you through the
procedure and accepts values for final calculations.
Once in cal mode, a press of this key accepts the new value.
While reviewing stored records, the mclr side of the key is active
to allow clearing records (ref. Clearing a Record/Memory Clear, pg.
37).
6. UP or DOWN Keys
While measuring in any parameter, the or keys activate