Etatron eSelect M 1 CD COOL, Инструкция по эксплуатации и техническому обслуживанию

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ENGLISH
Notes on CONDUCTIVITY PROBES
NOTE FOR CONDUCTIVITY SENSORS
The eSelect M - CD COOL instrument works with a simple conductivity sensor with open 2-electrode system, one graphite electrode or
AISI 316, both with PTFE body. Also available in AISI 316 with PVC body.
FOR 4/6 WIRE CONDUCTIVITY SENSORS (with built-in temperature sensor) by virtue of the various models on the market, should the
operator wish to use these sensors, they are kindly requested to contact the ETATRON service or the local dealer to receive the correct
set-up for connecting to the terminal board.
The instrument is NOT suitable for inductive sensors!
The eSelect M - CD COOL instrument is automatically adjusted for various conductivity ranges and adapts to the various features of
cell constants “ K ”. However, at the start of programming and in Expert Menu - Setpoint 1” the user may adjust the desired K factor.
IMPORTANT: the conductivity ranges described above are only indicative; considering that, for example, a K1 probe (range 20 mS) is able to
perform fair measurements below 2000 μS, only resolution will be less accurate. However, the same concept does not apply to higher ranges
ALPHA factor / TEMPERATURE / CONDUCTIVITY
The CE alpha factor is a corrective factor for the conductivity measurements to take into account the temperature: EACH
CONDUCTIVITY SENSOR DEPENDS ON THE TEMPERATURE. Conductivity changes linearly with the temperature of the solution. This
coefficient normalises the conductivity measurements at the reference temperature of 25°C. The
alpha factor assures the best measurement
result and the best accuracy. 2% for every °C, is on average the typical value found for many water samples with dissolved solids. Over a wide
temperature range (e.g. 0-100 °C) the temperature offset factor might not remain constant.
SENSOR CLEANING AND MAINTENANCE AND TECHNICAL SPECIFICATIONS
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