MRO 3 & 4 MANUAL
30
98-0140
Rev. F
6.3
CONTROLLER ADJUSTMENTS
Your controller has been calibrated prior to shipment and the conductivity set point has been
preset based on an analysis of your water provided at the time of sale. It may be necessary
to periodically calibrate the Conductivity. If the controller should require calibration, follow the
instructions below. Please contact AmeriWater at 800/535-5585 or 937/461-8833 if you have
any questions regarding the procedure.
CONDUCTIVITY CALIBRATION
Refer to Figure 6.2 for adjustment location (SPAN). To calibrate the Conductivity, place the
cell in a known standard solution. Adjust the span adjustment for the correct reading. If the
cell is installed, the unit can be calibrated by taking a sample from the PRODUCT TEST
PORT and testing it with a known, calibrated meter. Adjust the span control until the reading
matches the meter.
To calibrate the 2
nd
TDS / Conductivity, place the cell in a known standard solution. Adjust the
span adjustment for the correct reading. If the cell is installed, the unit can be calibrated by
taking a sample of the water from the chloramine sample port and testing it with a known, good
meter. Adjust the span control until the reading matches the meter.
DISPLAY ADJUSTMENT
The display contrast can be adjusted for best viewing by adjusting control R3. This control is
located toward the upper right corner of the board, just to the left of the cell connector.
Summary of Contents for MRO3
Page 8: ...MRO 3 4 MANUAL 5 98 0140 Rev F SECTION 3 COMPONENTS AND SCHEMATICS 3 1 EXTERNAL FRONT VIEW...
Page 10: ...MRO 3 4 MANUAL 7 98 0140 Rev F 3 2 INTERNAL REAR VIEW...
Page 12: ...MRO 3 4 MANUAL 9 98 0140 Rev F 3 3 ELECTRICAL DIAGRAM MRO3 MRO4...
Page 13: ...MRO 3 4 MANUAL 10 98 0140 Rev F 3 4 FLUID DIAGRAM MRO3 MRO4...
Page 34: ...MRO 3 4 MANUAL 31 98 0140 Rev F FIGURE 6 2...
Page 35: ...MRO 3 4 MANUAL 32 98 0140 Rev F FIGURE 6 3...
Page 52: ...MRO 3 4 MANUAL 49 98 0140 Rev F SECTION 11 MRO3 4 SPARE PARTS LISTING...
