Apex Classic Setup and Programming Guide v2.2
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CONDUCTIVITY RANGE
The PM2 supports 4 conductivity ranges to support the conductivity measurement
of various solutions. The four ranges are described in Table 2 - Conductivity
Range Options:
Range
Units
Calibration
Solution
Description
Low
0 to 850
S/cm
447 S/cm
Typically used to
measure the purity
of RO/DI water.
Medium 0.00 to
8.50
mS/cm
Typically used to
measure the
conductivity of a
fresh water tank.
High
0 to 85.0
mS/cm
53.0
mS/cm
Typically used to
measure the
conductivity of a salt
water aquarium.
Salinity 0 to 45.0
PPT
53.0
mS/cm
Typically used to
measure the salinity
of a saltwater
aquarium.
Table 2 - Conductivity Range Options
NOTE: When the conductivity range is in salinity mode, the probe is still actually
reading the conductivity of the water. Since the ratio of ions in salt water is very
well defined, there is a direct correlation between the conductivity of the water
and the salinity of the tank.
NOTE: If the conductivity range is changed, don’t forget to update outlet
programs that are based on the conductivity reading as the values will change
with the change in range.
To select the Conductivity range:
Apex Display: Setup – Cond Setup – Cond Range – If you have more than
one Conductivity port on your system, use the up/down arrow keys to
choose the port you wish to configure, press Select, then use the up/down
