Myron L 9PTK - Manual (Page 25)

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of table salt and tap water (ref. Cleaning Sensors, 2. pH/ORP,
pg. 50). Do not allow pH/ORP sensor to dry out.
I. ORP and Free Chlorine Modes
The Ultrameter III features the ability to measure the activity of oxidizing
or reducing chemicals in solution as ORP mV and the level of residual
sanitizer as ppm free chlorine. mV and ppm free chlorine are the two
most commonly used sanitizer measurement units in water quality
management.
1. ORP Mode Selection
ORP mode selection allows the user to choose to display ORP readings
in either ORP millivolts (mV) or as converted to parts per million (ppm)
free chlorine. Use ORP to measure the effectiveness of all oxidizing
and reducing sanitizers, such as ozone, bromine and chlorine. Use Free
Chlorine in systems sanitized by chlorine only. To select between ORP
and Free Chlorine modes:
1.
Press .
2. Press and hold for approximately 3 seconds.
The current preference for ORP units of measure is displayed. Factory
setting for this preference is mV.
3. Press the or keys to toggle between mV
(standard ORP mode) and ppm (free chlorine measurement
mode). The setting chosen is displayed.
PPM
4. Press any parameter key to exit ORP unit preference selection
or let the unit time out. ORP unit preference will be saved.
2. Measuring ORP
1. Ensure the 9P is in ORP mode (ref. ORP Mode Selection, pg. 21).