Thermo Fisher Scientific pH/ORP/Conductivity Field Monitors - Manual (Page 12)

9
7 MONITORING
Once the monitor is calibrated it is ready for monitoring. The monitor has two eyelet
holes. Mount the monitor where it can be easily viewed.
See figure below.
pH FM1
Continuous Monitor
CAL ENTER
Mounting Eyelets
8 ELECTRODE CARE AND MAINTENANCE
Since your pH/ORP electrode is susceptible to dirt and contamination, clean it every
one to three months depending on the extent and condition of use. Like batteries, a
pH/ORP electrode has limited life. Depending on the environment and the solution it
is immersed in, it may last from 6 to 12 months, or longer. Knowing when to change
your pH/ORP electrode usually comes after some experience. It is best to have
another pH/ORP tester such as pHScan/ pHTestr 1, Waterproof pHScan/ pHTestr
WP2, or ORPScan/ ORPTestr as reference.
8.1 pH/ORP electrode storage
For best results, always keep the pH/ORP bulb wet. Use the protective electrode
storage bottle filled with electrode storage solution (0.1M KCl) or pH 7 for overnight
and long term storage. DO NOT store in distilled water. The sensor should never be
stored dry. If left dry, soak in tap water or pH 7.0 buffer solution overnight.