CWT CWT Troubleshooting & Maintenance

Question 1

A digital scale displays an unstable, fluctuating reading even with no load on the platform. What is the most likely cause?

Accepted Answer

Drafts, vibration, or electrical interference affecting the load cell signal

Answer

The scale needs a new display unit

Answer

The calibration certificate has expired

Answer

The scale is operating above its maximum capacity

Question 2

What is the recommended first step when a load cell-based scale consistently reads higher than the actual weight?

Accepted Answer

Perform a span calibration adjustment using certified reference weights

Answer

Replace the display unit

Answer

Clean the weighing platform

Answer

Increase the scale's maximum capacity setting

Question 3

During routine maintenance, a CWT discovers that the load cell cable insulation is cracked near the junction box. What is the correct course of action?

Accepted Answer

Replace or repair the cable before returning the scale to service

Answer

Wrap the crack with electrical tape and continue using the scale

Answer

Document the finding and schedule replacement at next annual service

Answer

Increase the scale's filtering to compensate for the signal noise

Question 4

A vehicle scale fails the shift test, reading significantly lower when a test weight is placed at one end versus the other end. What component is most likely faulty?

Accepted Answer

One or more load cells or their wiring connections

Answer

The junction box power supply

Answer

The indicator's analog-to-digital converter

Answer

The scale's printer interface

Question 5

What maintenance practice helps prevent the build-up of debris under a floor scale platform that can cause false readings?

Accepted Answer

Regular cleaning of the scale pit and checking that check rods and bumpers are free

Answer

Painting the scale pit walls annually

Answer

Replacing the load cells on a fixed schedule regardless of condition

Answer

Installing a cover plate over the junction box

Question 6

A scale indicator displays an 'overload' error with no visible load on the platform. What should a CWT check first?

Accepted Answer

Whether something is physically jamming the platform or pressing against the scale structure

Answer

Whether the indicator's firmware needs updating

Answer

Whether the power supply voltage is too high

Answer

Whether the printer paper has run out