AW Gear Meters PROSCAN - Manual (Page 15)

ProScan In-Line Process Sensor
User Manual
14
This following illustrates how you can tailor the ProScan calibration to meet different process control
needs.
Figure 4 on page 16 shows an example of a multi-point calibration. For this example, milk samples were
used. Water = 4 mA, skim milk = 8 mA, 1% milk = 12 mA, 2% milk = 16 mA and whole milk = 20 mA. The
calibration selector switch was 0 position for water, 1 position for skim milk, 2 position for 1% milk, 3
position for 2% milk and 4 position for whole milk.
Figure 5 on page 17 shows a slightly different example of a multi-point calibration. In this case, a dairy
customer wanted a greater degree of sensitivity near 1% milkfat; a 6-point calibration was used, which
emphasized the 1% to 1.3% milkfat concentration. All that was necessary was to prepare samples of the
proper concentration. The ProScan calibration linearizer divided the 4 to 20 mA span into five sections of
3.2 mA each, including the key range in the middle of the graph.
If questions arise at any time, please call AW Gear Meters at (262) 884-9800.
Figure 2: ProScan Sensor attached to a sanitary T, electrical connection facing floor