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10. Click Prolink, then Calibration - Zero Calibration (see Figure 5.10).
FIGURE 5.10
11. In the Flow Calibration screen, set the Zero Time for 40 seconds, and click
Apply. With truck engine still running and the truck PTO disengaged, click Zero
and OK at the “… Proceed?” message. After 40 seconds, if the zeroing procedure is
successful, the status box will indicate all green lights. If there are any red lights, the
procedure was not successful, and must be repeated. When successful, click Done
(see Figure 5.11).
FIGURE 5.11
12. Click Prolink, then Process Variables. The ow rates should be low and evenly distributed around
zero. It will take approximately one minute before the readings appear and stabilize. Observe them for at
least 3 minutes.The Mass Flow readings should vary no more than +/- 0.2 lb/min, and the Volume
Flow readings should vary no more than +/- .05 gal/min. It is very important that the readings are evenly
distributed around zero. If readings are either all positive or all negative, the zero is not acceptable. If
readings seem within tolerance, click Prolink, then Totalizer Control, and Reset All Totals. Now view the
Process Variables, and watch the Volume Total for 5 minutes to assure the reading is notgreater than +/-
.25 gal after 5 minutes. The smaller the number, the better the Zero, but it cannot exceed +/- .25 gal in 5
minutes (see Figure 5). Note: Always verify that the temperature indicated in the Process Variables win-
dow is reasonable when servicing an RML2000. If it is not, please consult factory for NF#RF08-01.
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