Realize that a chemical test (salt strips or titration) is testing specifically for chloride ions while a meter, whether stand alone or a readout in the SWCG is testing the conductivity of the water, making some assumptions about the makeup of the ionic material in the water so the two will not always agree. Also, temperature does affect conductivity so it will be lower when the water is colder and higher when the water is hotter which is why it sometimes seems that the salt level is dropping in colder weather when measured with a meter or the cell readout. As far as your salt system is concerned it is since the conductivity is lower but if you add more salt you will find that the salt is too high once the weather warms up.