CMO Equipment Calibration & Diagnostics 4

Question 1

A Mobilyze operator calibrates a flow meter and finds the 'as-found' reading is within tolerance. What is the correct action?

Accepted Answer

Document the as-found reading and return the instrument to service without adjustment

Answer

If the as-found reading is within tolerance, no adjustment is needed; the result is documented and the instrument is returned to service without alteration.

Question 2

Which symptom most strongly suggests a Mobilyze encoder has lost its reference (home) position?

Accepted Answer

Erratic or absolute position drift after power cycling

Answer

Absolute position drift or incorrect position after power cycling indicates the encoder's reference point has been lost, requiring re-homing.

Question 3

What is the effect of performing calibration outside the specified temperature range of the instrument?

Accepted Answer

Thermal expansion and sensor response changes may introduce errors into the calibration

Answer

Temperature affects sensor response characteristics, material dimensions, and electronics, so calibrating outside the specified range introduces errors not present under normal operating conditions.

Question 4

A Mobilyze diagnostic readout shows 'ADC Saturation' on a sensor channel. What does this indicate?

Accepted Answer

The analog-to-digital converter is receiving a signal beyond its measurable input range

Answer

ADC saturation means the input voltage exceeds the converter's maximum range, producing clipped or maximum output values and making accurate measurement impossible.

Question 5

During vibration diagnostics on a Mobilyze platform, an FFT spectrum shows a dominant peak at exactly twice the shaft rotation frequency. This is typically associated with:

Accepted Answer

Misalignment

Answer

A dominant vibration peak at 2× rotational frequency (2X) is a classic signature of shaft or coupling misalignment.

(CMO) Certified Mobilyze Operator Practice Test

(CMO) Certified Mobilyze Operator Practice Test

CMO Equipment Calibration & Diagnostics 4