Siemens SITRANS WW300 Betriebsanleitung - Seite 33

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Troubleshooting

9.1

Mechanical troubleshooting

Review mechanical installation procedures and perform a thorough visual inspection to be sure

the operating error is caused by a mechanical problem. Then review and check the common

problems listed below.

Note

If you have difficulty determining the cause of the problem, contact your Siemens

representative. Be sure to have the Model Number and Serial Number of your system and all

of the calibration and setup parameters available before calling.

9.2

Zero Drift, non-repeatability, or non-linearity

Check for the following conditions:

● weigh idler alignment

Verify weigh idler alignment is as accurate as possible. Improper alignment is the most

common mechanical problem affecting scale accuracy. Contact your Siemens representative

if you find a problem here.

Note

Alignment should be +1/32" (+0.8 mm) to 0" (0 mm) aligned with approach and retreat

idlers.

● material buildup on weigh section or pulleys, or between the weigh deck and weighfeeder

frame

● belt mis-tracking

● belt too tight

● load cell bolts loose

● speed sensor, pulley, or idler slippage

● load cell shipping bolt (tagged) never removed

● head or tail pulley too high or low, relative to idler alignment. The head and tail pulleys should

be at least 1/8" lower than the approach and retreat idlers

SITRANS WW300

Operating Instructions, 05/2015, A5E33560691-AB