SPM leonova emerald, User Manual

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B:4
General measurement functions
B
The instrument can be set up to perform a transducer line quality test (TLQ) before measurement.
Testing the quality of signal transmission between transducer and instrument is essential because, in
a poor transducer line, part of the signal will be lost. This in turn means that measuring results will be
lower than they should be.
The overall term for the concept of transducer line quality testing is TLQ. Depending on the transducer
used, the following applies regarding units of measure and accepted values:
If the TLQ value is outside the accepted level(s), the measuring result cannot be saved.
Further information regarding TLQ is found in the respective measuring technique chapters in this
manual.
Transducer type 40000, 42000 44000 Vibration transducers, IEPE
TLQ type TLT TLR Bias voltage
Unit of measure No unit kΩ Volt
Accepted values 15 – 25 26 – 40 kΩ According to transducer settings
Transducer Line Quality, TLQ