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Scale Rate - 0 At All Times
Asphalt Meter Rate - Erratic Rate Indication

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 3. If  the  measured  voltage  is  less  than  1  vdc  or  greater  than  4.25  vdc,  replace  the  Scale  load  cell  amplifier  in  the scale mounted junction box. 4. If the measured voltage is still less than 1 vdc or greater than 4.25 vdc, replace the weigh scale load cell. 5. If the measured voltage is 2 or 4 vdc, force a new scale zero setting from screen 8652 using the procedure in the operators manual. Scale Rate - Constant, Non Zero Positive Value NOTE Scale re-calibration may be required f components are replaced. Inspect all sensor cables and connections. 1. Measure scale input voltage on Blend I/PO terminal strip, terminal 1 (+) to 2 (-). 2. If the measured voltage is 0, go to PROCEDURE 3, Blending Control fails to respond. 3. If  the  measured  voltage  is  less  than  1  vdc  or  greater  than  4.25  vdc,  replace  the  scale  load  cell  amplifier  in  the scale mounted junction box. 4. If the measured voltage is still less than 1 vdc or greater than 4.25 vdc, replace the weigh scale load cell. 5. Replace the input module in line with Blend I/O terminals 1 and 27). Asphalt Meter - O At All Times NOTE Meter re-calibration may be required if components are replaced. Inspect all sensor cables and connections. 1. Verify the meter shaft is actually turning, and that the casting at the outboard bearing of the meter has not been broken by excessive line pressure. 2. Open the Asphalt meter J-Box and verify that the pulse pickup wheel is mechanically centred on the pickup probe. 3. Verify the A/C meter span value shown on screen 865 is a non zero value similar to the nominal value recorded for this scale. page 4 - 13







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