DIP Switches S-1
High Set Control VR-8
Low Set Control VR-9
Figure 38
Changing Measuring Range
The measuring range of the FX-1000p is factory set to 0-5.00 ppm. It can be changed in the field to
one of these other ranges:
• 0-0.50 ppm (mg/l)
• 0-10.0 ppm (mg/l)
• 0-1.00 ppm (mg/l)
• 0-20.0 ppm (mg/l)
• 0-2.00 ppm (mg/l)
• 0-50.0 ppm (mg/l)
• 0-3.00 ppm (mg/l)
• 0-60.0 ppm (mg/l)
Certain range changes will only require a decimal point shift such as from 0-5.00 ppm to 0-50.0 ppm or
0-0.50 ppm. Other range changes such as from 0-5.00 to 0-10.0 ppm will require a decimal point shift
and the re-ranging procedure. A change from 0-5.00 ppm to 0-2.00 ppm would not need a decimal
shift, but would need the re-ranging procedure (see page 33).
Regardless of the range change, even if it’s only a shift in the decimal point, always calibrate the FX-
1000p after changing the measuring range.
All the adjustments used on the amplifier board of the analyzer are made using 30-turn trimmers. At
either end of the 30 turns there is a ratchet type “click” sound that indicates the end of travel has been
reached. You can also count 30 full turns in either direction to reach the end of travel.
The ZERO control adjustment runs the full internal range of the analyzer and, as such, can be used
as a built-in chlorine residual simulator for re-ranging or testing.
Special Configurations
31
FX-1000p
