12
Is the transducer shaft positioned outside the specified range (either extension or retraction) of
the instrument? Note that when the transducer shaft is fully retracted with the alignment pin
inside the alignment slot (Figure 1) the readings will likely be unstable because the vibrating
wire is now under-tensioned.
Is there a source of electrical noise nearby? Most probable sources of electrical noise are
motors, generators and antennas.
Symptom: Crackmeter Fails to Read
Is the cable cut or crushed? This can be checked with an ohmmeter. Nominal resistance
between the two transducer leads (usually red and black leads) is 180
,
10
. Remember to
add cable resistance when checking (22 AWG stranded copper leads are approximately 14.7
/1000' or 48.5
/km). If the resistance reads infinite, or very high (>1 megohm), a cut wire must
be suspected. If the resistance reads very low (
100
) a short in the cable is likely. Splicing
kits and instructions are available from the factory to repair broken or shorted cables. Consult
the factory for additional information.
Does the readout or datalogger work with another transducer? If not the readout or datalogger
may be malfunctioning.
