Myron L 9PTK with FCE Free Chlorine - Manual (Page 42)

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C. Conductivity, RES, TDS, Practices to Maintain Calibration
1. Clean oily films or organic material from the cell electrodes
with foaming cleaner or mild acid. Do not scrub inside the cell.
2. Calibrate with solutions close to the measurements you make.
Readings are compensated for temperature based on the
type of solution. If you choose to measure tap water with a
KCl compensation, which is often done (ref. An Example of 2
different solution selections and the resulting compensation,
pg. 59), and you calibrate with 442 solution because it is
handy, the further away from 25°C you are, the more error
you have. Your records of calibration changes will reflect
temperature changes more than the instrument’s accuracy.
3. Rinse out the cell with pure water after taking measurements.
Allowing slow dissolving crystals to form in the cell
contaminates future samples.
4. For maximum accuracy, keep the pH sensor cap on tight so
that no fluid washes into the conductivity cell.
D. pH and ORP/Free Chlorine Practices to Maintain Calibration
1. Keep the sensor wet with Myron L Storage Solution.
2. Rinse away caustic solutions immediately after use.
ORP calibration solutions are caustic, and ±5% is considered very
accurate. By using the pH zero setting (0 mV = 7 pH) for ORP and
precision electronics for detection, the Ultrameter III delivers better
accuracy without calibration than a simpler instrument could using
calibration solutions.
iX. memOry
This feature allows up to 100 readings with their temperatures to be
stored simultaneously for later recall. At the same time, the TIME and
DATE are also recorded. To download the memory to a computer, ref.
bluDock™ WIRELESS DATA TRANSFER INSTRUCTIONS, pg. 49.
A. Memory Storage
1. While displaying a measurement, press to record the
displayed value.
2. “memOry” will appear and the temperature display will
be momentarily replaced by a number (1-100) showing the
position of the record. Figure 9 shows a reading of 1806 µS
stored in memory record #4.